HomeMy WebLinkAboutUNDERGROUND TANK
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Groundwater Scientists · Environmental Consultants
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April 18, 1994
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Kern County Environmental Health Services Department
2700 "M" Street, Suite 300
Bakersfield, California 93301
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Attn: Ms, Flora Darling
RE: Addendum to Closure Workplan for Remediation of Gasoline Impacted Soil at
Pence Petroleum located at 901 E. Truxtun Avenue, Bakersfield, California.
Dear Ms, Darling:
Pursuant to our phone conversation on April 8, 1994, the information you requested
regarding the quantities of propane used and the volume of removed contaminants as
follows.
PROPANE USAGE
DAΠQUANTITY
09/24/92 114 gallons
09/14/93 142 gallons
1 2/16/93 194 gallons
12/17/93 169 gallons
01/10/94 174 gallons
02/07/94 193 gallons
Total 986 gallons
Note: Propane use records were obtained from Pence Petroleum files.
INSITU CONTAMINANT REMOVAL
An estimation of the final removal of hydrocarbons from the subsurface by the IC
Engine was calculated using the ideal gas law, stated as follows;
Ibs/day, = (ppm of constituent / E6)(lbs/lb-mole of constituent)
(volume of air; cfm) (atm. pressure; psi) (144 sq. in.! sq. ft.)
(60 min/hr) (hours run) divided by (1545) (temp,; deg. R),
1701 Westwind Drive, Suite 101 · Bakersfield, California 93301
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The estimation of hydrocarbon volumes were also based on the following
assumptions:
Hydrocarbon concentrations necessary to maintain operation of IC Engine = 5000
ppmv
Molecular weight of hydrocarbon = 86 Ib/lb-mole
Vapor flow rate = 58 cubic feet/minute
Standard conditions for temperature and pressure
Density of hydrocarbons = 53 Ibs/cubic foot
From the ideal gas law, an estimated 1.55 pounds of hydrocarbons vapors are
removed and consumed per hour. This volume translates into the following hourly rate
of usage:
1.55 Ibs/hour
53 Ib/cubic foot
X 7.48 gallons 1 cubic foot = 0,22 gallonsl hour
The YES machine has run for 9,561 hours since start-up of the equipment and has
used 986 gallons of supplemental propane. Therefore, the machine has removed
approximately 1,117.42 gallons from the subsurface (9,561 hours X 0.22 gallons/hour-
986 gallons of propane).
Should you require additional information or wish to discuss this matter, please contact
the undersigned,
Respectfully Submitted,
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Patrick McCullough
Project Geologist, I
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:;-Philip GcÞþlwin, R.G, #4779
Principal" Hydrogeologist
Registration Expires 6/30/94
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Groundwater Scientists · Environmental Consultants
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Closure Workplan:
Remediation of
Gasoline Impacted Soil
at
Pence Petroleum
Bakersfield, California
Presented to:
Mr, Robb Pence
Pence Petroleum
and
Mrs. Flora Darling
Kern County
Department of Environmental Health
Presented by:
AquaGeosciences, Inc,
March, 1994
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Patrick McCullough
Staff Geologist
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Philip Goalwin, R,G. #4779
Principal Hydrogeologist
Registration Expires 6/30/94
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1701 Westwínd Drive, Suite 101 · Bakersfield, California 93301
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TABLE OF CONTENT
PAGE ~O,
1.0 INTRODUCTION 2
1.1 Purpose 2
1.2 Scope of Work 2
1.3 Schedule 4
2,0 BACKGROUND 4
2,1 Property Description 4
2.2 Project History 4
3.0 WORKPLAN 9
3,1 Soil Boring Depths and Locations 9
4.0 METHODS 9
4.1 Boring Methods 9
4.2 Soil Sampling 10
4.3 Field Screening of Soil Samples 10
4.4 Soil Analyses 11
5.0 HEALTH RISK ASSESSMENT 11
6.0 CLEANUP TARGET CONCENTRATIONS 11
7.0 REPORT OF FINDINGS 12
8.0 SITE ABANDONMENT 12
9.0 QUALITY ASSURANCE PLAN 12
9.1 Sample Collection and Handling 12
Protocol
9.2 Sample Identification and Chain 12
of -Custody Protocol
9.3 Analytical Quality Assurance 13
10,0 SITE SAFETY PLAN 13
Exhibit 1 Vicinity Map
Exhibit 2 Site Map/Boring Locations
Appendix A Site Safety Plan
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1,0 INTRODUCTION
1.1 Purpose
Based upon propane usage for the Vapor Extraction System, AGI recommends the
following course of action:
1. Advance confirmation boring to establish the concentrations of residual
gasoline fuel remaining throughout the plume,
2. Prepare a contaminant fate transport analysis and a health risk assessment
prior to requesting regulatory closure of the site.
1.2 Scope of Work
The scope of services described in the Workplan include:
*
Locating underground utilities from as-built drawings (if available) as well
as Underground Service Alert (U.S,A.);
*
Advancing one (1) soil boring in the vicinity of the former gasoline storage
tanks and associated underground piping;
*
The one boring will be advanced to a depth of 110 feet, or ten feet of clean
(non-detect) soil, or until encountering groundwater;
*
Steam cleaning of all drilling and sampling equipment prior to the boring to
minimize cross-contamination;
*
Collecting soil samples at depths to be evaluated in the field, Initially,
samples will be collected at approximately five (5) foot intervals beginning
ar five (feet) feet below ground surface (bgs) and continuing until total
depth, The samples will be collected using a standard California split-
spoon sampler equipped with brass tubes, which have been steam
cleaned prior to use. These samples will be field screened and selected
samples will be submitted for chemical analyses;
*
Field Screening will be accomplished using a photo-ionization detector
(PID) equipped with a 10.0 eV lamp or a flame-ionizing detector (FID), Soil
samples will be placed in mason jars to approximately 50% capacity,
shaken, and let stand for approximately 15 minutes, A standard
headspace reading will then be collected;
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Soil samples for chemical analyses will be collected in brass tubes and
sealed with teflon tape, end caps and duct tape, The sealed tubes will be
placed in a cooler at 4° centigrade for transport to Halcyon, a State of
California OHS certified laboratory, under chain-of-custody protocol;
*
Analysis of approximately 22 soil samples for Total Petroleum
Hydrocarbons as gasoline and volatile aromatics using EPA Methods 8015
modified and 5030/8020, respectively;
*
Prepare field boring logs with appropriate lithology descriptions, blow
counts, PIO readings, etc, in accordance with ASTM Methodology and the
Unified Soils Classification System;
·
Prepare a Risk Assessment to assess whether soil contamination may be
left in place without threatening groundwater. AGI proposes using the
SESOIL Model described in the Leaking Underground Fuel Tank (LUFT)
Field Manual issued by the State of California LUFT Task Force. SESOIL
is a mathematical model which simulates the long-term environmental fate
of pollutants in the unsaturated zone, It can simulate movements of
pollutants introduced into the vadose zone and predict the quantity of
pollutants which may migrate to groundwater, The SESOIL simulation can
also be used to evaluate emission rates at the soil surface of the site, Input
parameters are similar to those used to determine groundwater risk.
*
AGI will prepare a Health Risk Assessment for benzene, a volatile aromatic
constituent in gasoline which poses the most concern from a human health
standpoint. The Health Risk Assessment will be conducted in accordance
with the methods described in the Toxic Air Pollutant Source Assessment
Manual for California Air Pollution Control Oistrict Permits (known as the
CAPCOA Manuãl),_ Cancer risk for benzene is evaluated using the
emission rates calculated from the SESOIL Model and the resultant
ambient air concentrations from the CAPCOA guidelines.
·
Prepare a written report summarizing the results of the investigation
including conclusions and recommendations, Additionally, a summary of
the Risk Assessment which will include all input assumptions and
variables used in the calculations will be presented, The report will be
certified by a California RegiStered Geologist. It should be noted that
preparation of this assessment and its subsequent certification by a
registered geologist does not automatically assure approval for closure,
but provides a quantitative evaluation of the risk to human health for further
evaluation by the State,
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1,3 Schedule
AquaGeosciences, Inc. anticipates beginning work described herein within one week
upon approval from the County and authorization to proceed from Mr, Robb Pence,
The soil boring can be drilled and sampled in approximately two working days. The
analytical data will be reported within two weeks of field work completion and the
report will be completed within one month after receipt of the analytical results,
2.0 BACKGROUND
2.1 Property Description
The site, known as Pence Petroleum Company, is located at 901 E. Truxtun Avenue,
on the southeast corner of East Truxtun and Beale Avenues in Bakersfield, California
(Exhibit 1), The property parcel number is APN 017-160-07-00-0,
The property is currently unoccupied and was formerly operated as Pence Automated
Fuels by the Pence Petroleum Company. Prior to 1986, the site was owned by Davies
Oil, Bakersfield, California, and was used as an automated cardlock fueling station,
Exhibit 2 shows the former locations of the site facilities, as well as the former borings
and existing wells,
Positioned to the south-southeast of downtown Bakersfield, land use surrounding the
site is varied in nature ranging from Light and Service Industrial to High Residential as
indicated by the Metropolitan Bakersfield 2010 General Plan - East Map (3-7-90,
updated 10-14091), On three sides (north, west, and south) the site abuts public
streets (East Truxtun, Beale, and East 18th Street, respectively), To the east, at 985
East Truxtun, is Signet Hardware, Inc. Residential areas lie to the south and southeast
of the site.
2.~~ Project History
In 1986 Pence Petroleum purchased the site from Davies Oil of Bakersfield. On
November 1, 1989, two (2) 6,000-gallon underground gasoline storage tanks, one (1)
10,000-gallon underground gasoline storage tank, one dispenser island and
associated product lines were removed from Pence Petroleum's Automated Fuels
Cardlock. Soil samples were collected from 2 and 6 feet beneath the former tanks at
the time of their removal. Table 1 summarizes the results of the laboratory analyses of
the soil samples reported in the Associated Soils Analysis, Inc., Site Assessment
Study of December 28, 1990, on file with the County,
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SAMfLE LOCATION
P1-2'
P2-6'
P3-2'
P4-6'
P5-2'
P6-6'
P7-2'
P8-6'
P9-2'
P10-6'
P11-2'
P12-6'
P13-2'
P14-6'
P15-2'
P16-S'
TEST METHOD:
Minimum
Reporting Levels:
NO
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TABLE 1
Summary of Laboratory Analyses
Tanks and Fuel Island Removal
November 1, 1989
(Soil in ppm)
Benzene Toluene Xylenes Ethvl-Benzene IEI:iLgl
0.28 4.17 42.98 5.20 534.09
r-i) 0.38 8.51 0.84 127.88
NO r-v 0.84 0.09 47.60
NO r-v 0.24 r-v 27.90 ..I
23.81 350,69 888.24 88.56 4550.10
58.81 588.24 1543.82 213.32 8843.63 .¡
NO r-v NO t-.O NO
NO NO 0.72 0.05 31.52
2.40 48.95 222.26 14.10 1719.31 )
10.63 136.03 630.24 53.35 3491.08 J
tÐ 0.10 0.33 0.02 6.93
NO 0.03 0.16 NO fII)
NO fII) 0.11 f\D 11.85
NO ND NO NO ND
NO ND NO ND r-v
NO 0.54 2.32 0.26 65.55
TPH as gasoline by DHS LUFf Method a015m and BTEX by EPA Method 8020
BTEX 0.03 uglg
TPH 5.0 ug/g
Non-Detected
The laboratory results indicated that the soil was impacted with petroleum fuel, with the
highest concentrations of petroleum constituents detected at the eastern ends of the
former tanks, Based upon these results, on March 2, 1990 the County requested a site
characterization to assess the extent of impacted soil.
Subsequent to the request, Associated Soils Analysis Inc, (ASA) advanced four soil
borings to a maximum depth of 120 feet below surface grade (bsg). Boring B-3 was
advanced in the vicinity of the former product line, believed to have originated the
release, and -detected a maximum concentration of total petroleum hydrocarbons as
gasoline (TPHg) of 24,000 mg/kg at a depth of 50 feet (bsg), B-3 was terminated at a
depth of 80 feet (bsg) with TPHg concentrations of 4,700 mg/kg, Boring B-3A,
advanced ten feet to the west of B-3, detected various concentrations of TPHg ranging
between non detect to 0.62 between a depth of 90 to 120 feet (bsg), Chemical
analyses of these borings are summarized in Table 2 and reported in the Associated
Soils Analysis, Inc" Site Assessment Study of December 28, 1990, on file with the
County.
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TABLE 2
Laboratory Results of Soils-Associated Soils Analysis Inc. Investigation
July 9 & 10 and November 6 and 7,1990
ßgrlng, Dig1h Benzene Toluene Ethylbenzene ~ IW
B2 11 I\D I\D NO NO t\O
B2 16 ND NJ NO NO t\O
B2 26 I\D t\O NO f\[) ND
B2 36 0.013 0.028 NO 0.0178 NO
B2 51 0.29 0.49 0.030 0.179 5.2
B3 11 fin 49 13 184 1800
83 31 : 21 340 78 480 4200
B3 51 I ~~ I 2000 400 2430 24000
B3 71 1600 350 12080 18000
B3 81 ~ 370 97 600 4700
B3A 90 0.061 0.006 0.069 0.022 0.54
B3A 95 0.073 0.062 0.38 0.31 2.2
B3A 100 0.008 0.006 0.023 0.018 f'.D
B3A 105 0.032 0.32 0.17 0.16 1.3
B3A 110 7.0 ¡ t\O 11 NO t\O
B3A 115 0.01 0.01 0.042 0.05 0.62
B3A 120 0.041 0.052 0.28 0.27 2
84 75 0.078 0.009 NO 0.023 /II)
B4 85 0.18 0.19 0.025 0.057 0.82
B4 95 0.38 0.05 0.22 0.18 2.0
B4 105 0.3 0.35 0.13 0.11 1.5
B4 110 I\D f'.D ND NO f'.D
B4 115 NO t.{) NO NO NO
84 120 NO t.{) NO NO I\D
All results in milligrams per kilogram
ND '= tiot.D.ellàld
The Phase I assessment work performed by ASA did not delineate the vertical limit of
hydrocarbon impacted soil beneath the probable product line release, nor was the
study able to define the lateral limits of the plume towards the north, east, or south of
the site, Th& County requested an additional investigation to assess the lateral and
vertical extent of impacted soil.
In August, 1991 AquaGeosciences, Inc. (AGI) advanced four borings in compliance
with the County's request and completed the borings as vapor extraction/inlet wells,
The borings were advanced to varying depths ranging between 40 to 105 feet (bsg),
Table 3 summarizes the laboratory analyses of select soil samples collected from the
soil borings,
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Laboratory Results of Soils-AquaGeosciences Inc. Investigation
August 21 through 30, 1991
ß2J:ing, Qggtb Benzene Toluene Ethylbenzene ~ IW
VI-1 25 183.750 421.220 82.1 05 984.220 15000
VI-1 40 73.505 168.210 31.215 492,015 6625
VI·1 55 91.875 210.000 42.310 615.010 7420
VI·1 70 61.250 140.000 27.010 322.975 5105
VE·1 65 200.335 505.075 92.015 1105.125 17220
VE-1 85 147.310 323.015 52.710 779.875 12910
VE-1 100 0.995 1.210, 0.275 4.225 125
VE-1 105 NO t-l) NO NO t-i)'
VE·2 35 0.335 1.010 0.105 2.220 120
VE-2 50 12.220 28.885 5.500 103.775 1850
VE-2 60 2.210 9.055 0.875 12.150 375
VE-:2 80 ND NO t-l) NJ 30
VE-3 10 t-i) t-l) NO 0.105 80
VE-3 15 1.115 20.210 0.725 9.990 320
VE-3 20 11.775 26.210 3.330 88.845 1250
VE·3 30 17.200 50.270 7.710 161.075 1825
All results in milligrams per kilogram
ND = HotlletectBd
Elevated concentrations of TPHg were encountered to a depth of approximately 100
feet (bsg) in boring VE-1. The extraction well borings were positioned within the ..
vicinity of highest concentrations of soil contamination and completed with 30 to 40
feet of screen over intervals selected on the basis of field screening results to initiate a
soil vapor extraction remediation program, An internal combustion engine was
manifolded to the extraction wells to extract and destroy the hydrocarbons contained in
the soil vapor,
AGI recommended the installation of additional air/vapor inlet wells to enhance
recovery of bydrocarbon vapors in the soil. On October 13 and 14, 1993, AGI
advanced three borings and completed the borings as vapor inlet wells. The
analytical results are listed below in Table 4. These inlet wells were designed to
sweep contaminants toward the present vapor extraction wells,
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SUMMARY OF LABORATORY ANALYSIS
OF SOIL SAMPLES FROM SOILS INVESTIGATION"
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Borina
VI·4
VI-5
VI-6
Ethyl Total
Samcle Oecth(ft) Benzene Toluene Benzene Xvlene
V-4-35 36-36 5 NO NO NO NO
V-4-45 46-46 5 o 12 0,53 o 32 1 0
V-4-50 51-51.5 NO NO NO NO
V-4-60 61-61 5 o 78 2.0 NO 4,3
V-4-65 66·66 5 NO NO ND NO
V-4-70 71-715 0.023 0,022 NO o 021
V-4-85 86-86,5 NO NO NO NO
V-4-95 96-96,5 NO NO NO NO
V-5-15 16-16 5 NO 0,33 o 74 3 9
V-5-20 21-215 NO 2.3 3,2 9,5
V-5-30 31-315 0,2 3 7 2.5 1 1
V-5-40 41-415 NO 1 0 NO 22
V-6-25 26-26 5 NO NO NO NO
V-6-35 36-36 5 NO NO NO NO
V-6-40 41-41,5 NO NO NO NO
V-6-45 46-46 5 NO NO NO o 01
V-6-50 51-515 NO NO NO NO
V-6-55 56-56.5 NO 0.009 NO o 015
V-6-70 71-715 NO NO NO NO
V-6-80 81-815 NO NO NO NO
" Results reported in mg/kg (ppm)
TPH (Gas'
31
200
NO /
1000 ,
NO
0,7
NO
NO
810
910 J
1200 "
5200./
NO
NO
1 8
0,5
NO
3,9
NO
NO
~
From October 15, 1993 through December, 1993, the machine ran almost exclusively
on processed -soil vapors and required very little supplemental propane. Beginning in
early December, 1993 propane usage increased dramatically indicating that the
concentration of the soil vapors had decreased. At this time the machine was shut
down for a period of one week to allow soil vapors to reaccumulate. The machine was
then restarted. Propane use was low for one day and then increased dramatically.
This cY9ling ~s conducted three times from December, 1993 through January, 1994, //
each time propane use was exceedingly high; therefor inion that soil ../
por concentrations have decreased to a concentration that warrants a confirmatory
s6ìf boring.
----------
The following sections detail AGl's workplan for this confirmatory sampling and
potential request for site closure.
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3.0 WORKPLAN
AquaGeosciences, Inc, proposes to assess and evaluate the remediation by vapor
extraction of gasoline and BTEX impacted soil at the Pence site toward obtaining final
closure, The proposed confirmatory sampling program is designed to meet the
closure requirements of the Kern County Environmental Health Services (KCEHS)
and to address any remaining public health concerns by conducting a Health Risk
Assessment with data derived from a site specific calibrated SESOll model of surface
emission/vadose diffusion/and groundwater transport of the primary constituent of
concern, which is benzene.
3,1 Soil Boring Depths and locations
One (1) soil borings will be advanced to a depth of approximately 110 feet. Soil
samples will be collected at five (5) foot intervals beginning at five (5) feet and
continuing to a proposed depth of 110 feet. Should field screening indicate the
presence of hydrocarbons, drilling will continue until groundwater is encountered or,
ten feet of unimpacted soil is detected,
The proposed locations are shown on Exhibit 2. The location has been chosen to
provide roughly continuous hydrocarbon concentration data in the area where pre·
remediation concentrations were the highest. Confirmation Boring C-1 will be
centrally located in the impacted soil plume between boring VE-1 and B-3, The
highest concentrations of petroleum constituents were detected at these locations
during the initial investigations.
4.0 METHODS
The following sections will describe in detail the methods to be employed in
implementing this workplan, -
4.1 Boring Methods
The borings will be advanced using aCME 75 rig, or equivalent, with a six inch or
larger diameter hollow stem continuous flight auger in accordance with ASTM Method
o 1452-80 for soil investigations and sampling by auger borings, The augers will be
steam cleaned prior to drilling each boring. The lithology and other pertinent data will
be recorded on a field boring log in accordance with Method D 2488-84 for visual
description and identification of soils,
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Cuttings and other spoil from the borings will be placed in appropriate O,Q,T, approved,
55·gallon drums until verified, with analytical results, whether or not the soil is
contaminated, If the material is contaminated, a written plan will be submitted by the
facility operator to the County for their approval before treatment and/or disposal
occurs, Disposal will be the responsibility of the Facility operator and will occur within
90 days of completion of drilling, /
Backfilling of the boring will be accomplished by pouring a cement/bentonite slurry. If
contaminants are not found or suspected in this boring, backfilling will take place by
placing native soil into the borehole and capping with a cement/bentonite plug,
4.2 Soil Sampling
Soil samples will be collected through the auger in 2-inch diameter brass sleeves
driven in a split spoon sampler by a 140 pound hammer with a 30-inch drop in
accordance with ASTM Methods 01586-84 for split-barrel sampling of soil and 01587-
83 for thin-walled tube sampling of soils. The brass sleeves and sampler will be steam
cleaned prior to each use,
Soil samples will be driven at depths of 5 foot intervals in each boring to a total depth
of 110 feet. The blow counts, recovery, and lithology will be recorded on the field logs,
lithology will be described by an experienced environmental geologist under the
direct supervision of a California Registered Geologist in accordance with ASTM
procedure 02488-84 (Standard Practice for Description and Identification of Soils),
One brass sleeve with soil from each interval will be sealed with teflon tape, capped,
secured with duct tape, labeled in accordance with EPA protocols, recorded on a
chain-of-custody form, placed in a cooler at 4° centigrade or less, and transported to a
California Certified Laboratory with the chain-of-custody for the specified analyses,
4.3 Field Screening of son Samples
Soil samples will be collected using three six-inch brass tubes installed inside a split-
spoon samplér. The middle sample tube will be immediately sealed and prepared for
transport, and stored in an iced c..ler upon collection. The bottom tube will be used
for lithologic description, and the top tube will be used for field screening, The material
from the top tube will be placed in a mason jar to approximately 50 percent capacity,
shaken, and stored for a period of 15 minutes. A standard heads pace reading will be
collected at this time and noted on the boring log. Field screening will be
accomplished using a photo-ionization detector (PI D). Additionally, on-site chemical
analyses, using an SRI Instruments Gas Chromatograph (GC) in AGl's Mobile
Laboratory, will be performed during field operations,
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4.4 Soil Analyses
Approximately twenty two (22) soil samples will be analyzed by Halcyon Laboratories,
a California State Certified Laboratory in accordance with state guidelines and EPA
protocols. The number of samples analyzed will be determined by the total depth of
the boring; however, a sample of each five (5) foot interval will be submitted for
analysis,
The samples will be analyzed for fuel hydrocarbons as gasoline and volatile aromatics
using EPA methods 8015 Modified and 5030/8020, respectively. The detection limits
for TPH as gasoline will be 0.5 mglkg and for BTEX, 0,005 mg/kg.
5.0 HEALTH RISK ASSESSMENT
Once the remnant gasoline concentrations have been evaluated, a Health Risk
Assessment will be conducted to demonstrate the residual levels that may be left in
place without significant risk to human health or the environment. The Health Risk
Assessment will be performed according to the methods described in Sections 2 and 3
of the October 1, 1987 draft of the Toxic Air Pollutant Source Assessment Manual for
California Air Pollution Control District Permits (known as the CAPCOA Manual). The
objective is to demonstrate that the residually impacted soil may be left in place,
Therefore, the assessment will focus on exposures due to non-inhalation pathways,
such as soil ingestion, as well as, surface water and groundwater ingestion, The
inhalation exposure due to the residual gasoline fuel remaining is expected to be
minuscule and need not be pursued beyond a screening level unless initial estimates
indicate a substantial risk from this exposure pathway,
AGI proposes using the SESOIL Model described in the Leaking Underground Fuel
Tank (LUFT) Field Manual issued by the State of California LUFT Task Force, SESOIL
is a mathematical model whiçh simulates the long-term environmental fate and
transport of pollutants in the unsaturated (vadose) zone. It can simulate movements of
pollutants introduced into the vadose zone and predict the amount of pollutants which
will enter the -groundwater. The SESOIL model can also be used to simulate emission
rates at the surface of the site. Input parameters are similar to those used to determine
groundwater.
6.0 CLEANUP TARGET CONCENTRATIONS
Cleanup target concentrations for gasoline and purgeable aromatics in soil are 1000
part per million (ppm) fer TPHg and 1,0 ppm for BTEX with laboratory detection limits
of 0.5 ppm TPHd and 0.005 ppm BTEX.
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7,0 REPORT OF FINDINGS
A report of findings will be prepared which will detail field activities, analytical results,
discussion of analytical results, conclusions, and recommendations. The report will
also include a summary of the Health Risk Assessment which will contain all input
parameters, assumptions and variables used in the calculations. The report of
findings will recommend what further action, if necessary, may be required, If
additional work is warranted, the scope of the additional work will be specified in the
report, The report of findings will be certified by a California Registered Geologist.
8,0 SITE ABANDONMENT PROCEDURES
Abandonment of operations at the subject site requires the removal of surface
facilities, as well as the destruction and/or cementation of all vapor extraction and inlet
wells. to include the following points:
*
Piping will be disconnected from the Vapor Extraction System and
well heads;
*
The Vapor Extraction machine and piping will be loaded onto a trailer and
removed from the site;
*
Upon approval from the County, the Vapor Extraction wells (VE-1 through VE-3)
and Vapor Inlet wells (VI-4 througmyl-6) will be destroyed by removing the well
head extensions and backfilling the casing and screen from total depth to
surface'grade with neat cement.
9,0
QUALITY ASSURANCE PLAN
This section describes field and--analytical quality-assurance procedures to be
followed during the investigation and remediation.
9,1 Sample Collection and Handling Protocol
Proper soil sample coHection and handling are essential to assure quality of data
obtained from a sample. Each soil sample, therefore, will be collected in a brass tube,
properly preserved for the intended analysis, and analyzed within the permissible
holding time, Protocol to be applied in this project is described in Section 4,
9.2 Sample Identification and Chain-of-Custody Protocol
Sample identification and chain-of-custody procedures are designed to assure sample
quality and to document sample possession from the time of collection to the time of its
ultimate disposal. The container for each sample submitted for analysis will have a
1 2 of 19
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label affixed with the identifying number or the number will be inscribed directly on the
container, Additional information, such as, location, the depth of collection, sampler,
and date and time of collection will be included on the label.
The analytical laboratory will assign a separate sample number unique to that sample
for internal sample coordination and identification, A description of the sample
including the sample number and other pertinent information regarding its collection
and/or geologic significance will be written in field notes and/or a geologic boring log
being prepared by the site geologist. These field documents will be kept in a
permanent project file. All samples will be analyzed by a State certified laboratory for
the requested parameters,
A properly completed chain-of-custody form will be submitted to the analytical
laboratory along with the sample{s) and the laboratory's assigned number will be
properly entered on the form, A quality control officer at the laboratory will verify
integrity of samples submitted, proper sample volume, correctness of containers used,
and properly executed chain-of-custody form, Pertinent information will be entered
into a log book kept by the laboratory,
9.~1 Analytical Quality Assurance
In addition to routine calibration of analytical instruments with standards and
blanks, the analyst is required to run duplicates and spikes on 10 percent of analyses
to assure an added measure of reliability and precision, Accuracy is verified through
the following:
1. U,S, EPA and State certification of results;
2, Participation in inter-laboratory round robin program;
3, "Blind" samples are submitted for analysis by the quality control officer on
a weekly basis. These are prepared from National Bureau of Standards
specifications of EPA reference standards;
4. Verification of results with an alternative method,
10.0 SITE SAFETY PLAN
Appendix A contains a Site Safety Plan which complies with Worker Right to
Know Regulations and CCR Title 26,
1 3 of 19
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AauaGeoscjences Inc
1701 Yt·~~¡~··..,.md Driv~ Suite- 10:::
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East Truxtun Avenue
Sidewalk
Fence Line
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Approximate location of
former underground tanks
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AquaGeosciences, Inc,
1701 Westwind Drive, Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax: (805) 32801129
Sidewalk
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B-2
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Vapor
Extraction
Unit
B- A
VE-3
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VI-1
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VI-6
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Proposed Confirmation Boring
VE-1
o
Approximate location of dispenser island
VI-5
·
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Approximate limit of
petroleum hydrocarbon
impacted soil
Key
e Testhole Borings
o Vapor Extraction Wells
· Vapor Inlet Wells
· Confirmation boring
o
Pole Anchor
Title
pence PetroklluD
901 E, Truxtun
Bakersfield, California
SITE MAP
Exhibit
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APPENDIX A
SITE SAFETY PLAN
Introduction:
A Site Safety Plan (SSP) has been designed to address safety provisions needed
during the confirmation boring, Its purpose is to provide established procedures to
protect all on-site personnel from direct skin contact, inhalation, or ingestion of
potentially hazardous materials that may be encountered at the site, The SSP
establishes personnel responsibilities, personal protective equipment standards
decontamination procedures, and emergency action plans.
AquaGeosciences, Inc. seeks to enter property described above for the purpose of
conducting a confirmation boring consisting of one (1) boring to evaluate the residual
contamination of the soH,
Soils samples will be collected at five-foot intervals during exploratory drilling using a
California modified split-spoon sampler through a hollow-stem auger, All possible
efforts will be made to collect undisturbed samples, Each sample to be chemically
analyzed will be collected in a brass sleeve, capped with lined plastic lids, sealed with
tape, and placed on ice in a cooler immediately. All Chain-of-Custody protocol will be
followed,
Drilling equipment will be brought to the site and operated by a subcontractor:
Soils Engineering, Inc,
4700 District Boulevard
Bakersfield,. California 93313
C-57 License Number 253192
The SSP describes means for protecting all on-site personnel from deleterious
contamination or personal injury while conducting on-site activities, As described
below we will meet all requirements promulgated by the California Department of
Health Services,
Site Background:
This property is owned by Mr. Robb Pence, located at 901 E. Truxtun Ave"
Bakersfield, California. The facility contained two (2) 6,000-gallon underground
gasoline storag,e tank and one (1) 10,000-gallon underground gasoline storage tanks.
1 4 of 1 9
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Responsibilities of Key Personnel:
All personnel on site will have assigned responsibilities. Mr, Patrick
McCullough of AquaGeosciences, Inc, will serve as Project Manager and On-Site
Geologist. He will also serve as Site Safety Officer (SSO), As SSO, Mr. McCullough
will assure that on-site personnel have received a copy of SSP. Personnel will be
required to document their full understanding of the SSP before admission to the site,
Compliance with the SSP will be monitored at all times by the SSO. The SSO will
conduct a training session to assure that all are aware of safe work practices, In the
training session, personnel will be made aware of hazards at the site and will utilize
Material Safety Date Sheets for information on compounds to be encountered,
Mr, Patrick McCullough will also be responsible for keeping field notes,
collecting and securing samples, and assuring sample integrity by adherence to
Chain-of-Custody protocol.
On-site employees will take reasonable precautions to avoid unforeseen
hazards. After documenting understanding of the SSP, each on-site employee will be
responsible for strict adherence to all points contained herein, Any deviation observed
will be reported to the SSO and corrected. On-site employees are held responsible to
perform only those tasks for which they believe they are qualified,
Provisions of this SSP are mandatory and personnel associated with on-site
activities will adhere strictly hereto.
Job Hazard Analysis:
Hazards likely to be encountered on site include those commonly encountered
when operating any mechanical equipment, such as the danger of falling objects or
moving machinery. -
Simple precautions will reduce or eliminate risks associated with operating
such equipmént.
A drilling contractor has been employed to deliver and operate all drilling
equipment. Qualified personnel only will have any contact with this equipment. All on-
site personnel, including the drilling contractor and his employees, are required to
wear hard hats when in close proximity to drilling equipment. Latex gloves will be
worn by persons collecting or handling samples to prevent exposure to contaminants,
Gloves will be changed between samples, and used ones discarded, to avoid cross-
contamination. Proper respiratory equipment will be worn if vapor contamination
levels on site exceed action levels as determined using a PID, Action
levels requiring respiratory apparatus will be 5 ppm, in the breathing space.
1 5 of 19
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Furthermore, no on-site smoking, open flame, or sparks will be permitted in order to
prevent accidental ignition.
Risk Assessment Summary:
Exposure to chemicals anticipated on site include gasoline, and benzene,
toluene, and xylene (BTX). These chemicals represent a hazard because they are
moderately to extremely toxic and most are highly flammable, Threshold Limit Values
(TLV's), Short Term Exposure Limits (STEL's), and Toxicity levels (LD50, oral-rat), all in
mg/kg (ppm), are listed below:
Compound TLV STEL
Gasoline 200 300
Benzene 10 25
Toluene 100 150
Xylene 100 150
Toxicity
4894
5000
4300
Benzene is considered an extreme cancer hazard.
Exposure Monitoring Plan:
A Photo-Ionization Detector (PID) will be used to monitor vapor concentrations
around the site, Should concentrations exceed TLV's, protective measures will be
taken. Passive dosimeter badges will be placed in downwind locations if PID reading
indicate high levels of volatile organics in the breathing space.
Personal Protective Equipment:
Personnel on site will have access to respirators with organic vapor cartridges.
Replacement cartridges will be available on site as needed. When handling samples,
the on-site geologist will wear latex gloves, Hard hats will be worn by all personnel on
site when in proximity of drilling equipment.
Work Zones and Security Measures:
Access to the site will be restricted to authorized personnel. A set of cones,
placards, or wide yellow tape, surrounding the site will define the perimeter, The
Project Manager will be responsible for site security
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Decontamination Measures:
Avoidance of contamination whenever possible is the best method for
protection, Common sense dictates that on-site personnel avoid sitting, leaning, or
placing equipment on possibly contaminated soil.
All personnel will be advised to wash their hands, neck, and face with soap and
water before taking a break or leaving the site, Respirators will be washed with soap
and water following each day's use,
Drilling and sampling equipment used will be decontaminated by steam-
cleaning, Sampling equipment will be decontaminated before each sample is taken
and drilling equipment will be decontaminated before each boring is commenced.
General Safe Work Practices:
Drillers and other on-site personnel will be briefed each day in "tailgate"
meetings as to the day's goals and equipment to be used, Anticipated contaminants
and emergency procedures will be reviewed, Appropriate personal protective
equipment will be put on and verified correct by SSO, including respirator fit.
Drilling and sampling equipment will be steam-cleaned before being brought
on site. Split-spoon sampling equipment will be steam-cleaned before each use.
Augers will be steam-cleaned between borings,
The On-Site Geologist will oversee operations and log borings in consultation
with drillers. The Sample Coordinator will assure that proper protocol is used at all
times in collecting and handling samples,
Training Requirements:
The SSO will conduct a pre-site training session which will include all points of
MSDS forms, - contaminant properties, warning signs, health hazard data, risk from
exposure, and emergency first aid, The SSO will assure that everyone fully
understands site hazards,
Medical Surveillance Program:
1-
According to CFR 29, 1910,120, Paragraph (f), employees who wear respirators
30 days or more during one year or who have been exposed to hazardous substances
or health hazards above established permissible exposure limits are required to be
monitored medically, All site personnel will be required to have had a complete
chemical physiçal within the past year.
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Record Keeping:
Documentation will be kept on personnel exposed to contaminant hazards on
the job site according to OSHA regulations, These will include documentation that
employees have received training on the SSP, respiratory protection, MSDS forms,
and all emergency procedures, These will be reviewed during the pre-site training
meeting,
Exposure records on each job will be kept for 30 years to meet requirements.
Included will be names and social security number of employees, medical evaluation,
on-the-job logs from entry to exit, first aid administered, visits on site by outside
persons, and personal air monitoring records.
Contingency Plans:
In the event of accident, injury, or other emergency, the Project Director, Senior
Project Manager, or other person will notify appropriate government agencies or
individuals as follows:
1 . Kern County Environmental Health Services Department
2700 "M" Street, Suite 300
Bakersfield, California 93301
(805) 861-3636
Contact: Ms. Flora Darling
2. Police, Fire, or Ambulance emergency 911
3, Nearest Emergency Hospital:
Kern Medical Center
1830 Flower Street
Bakersfield, California 93305
(805) 326-2000
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Emergency Numbers for AquaGeoscienC9s, Inc, personnel:
Mr, Patrick McCullough of AGI will serve as Project Manager and On-Site
Geologist. He may be contacted at the work site by calling the following numbers:
Pager: (805) 632-0103
Car Phone: (805) 838-0842
In case of an emergency, you may contact Mr. Phil Goalwin, R.G, of AGI at the
following numbers:
Office: (805) 328-0962
Car Phone: (805) 838-7735
Home: (805) 664-0876
1 9 of 1 9
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Groundwater Scientists · Environmentl! Consultants
,REVISED CLOSURE REPORT
OF
GASOLINE IMPACTED SOIL
AT
PENCE PETROLEUM
BAKERSFIELD, CALIFORNIA
PRESENTED TO
MR. ROBERT PENCE
PENCE PETROLEUM
AND
MRS, FLORA DARLING
KERN COUNTY
DEPARTMENT OF ENVIRONMENTAL HEALTH SERVICES
PRESENTED BY
AQUAGEOSCIENCES, INC,
NOVEMBER, 1994
Î "/ . ~ "./Ú / /
C:¡(?¿t~~ ¿-, é)M;Øt¿_-2'/l¿~
PATRICK MCCULLOUGH
CLAUS L. ENGELHARDT
STAFF GEOLOGISTS
(I\) f) ~I
\J~LV-t~6< .
PHILIP G LWIN, R.G, # 9
PRINCIPA HYDROGEOLOGIST
REGISTRATION EXPIRES 11/11/96
4440 Grissom Street, Suite 100 · Bakersfield, California 93313
(805) 836-8100 · FAX (805) 836-8800
(800) 301-4244
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TABLE OF CONTENTS
PAGE NO,
1,0 INTRODUCTION 2
2.0 BACKGROUND 2
3,0 SITE DESCRIPTION 3
4.0 SITE GEOLOGY 7
5.0 FIELD ACTIVITIES 8
5.1 Boring Methods 8
5,2 Soil Sampling 8
5.3 Field Screening ot Soil Samples 9
5,4 Soil Analyses 9
6.0 FINDINGS 9
7.0 RISK ANALYSIS - GROUNDWATER 10
8.0 RISK ANALYSIS - SURFACE ENVIRONMENT 16
8,1 Summary ot Risk Analysis tor Benzene 16
8.2 Risk Analysis tor Benzene 17
9.0 RECOMMENDATIONS 21
10,0 LIMITATIONS 21
11,0 REFERENCES 21
Exhibit 1
Exhibit 2
Exhibit 3
Exhibit 4
Exhibit 5
Exhibit 6
Tables 1-5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Vici nity Map
Site Map/Boring Locations
Aerial View ot Plume
Cross-Section A-Ä
Cross-Section B-B'
Boring Log C-1
In Text
Leaching Potential Analysis
General Risk Appraisal
Benzene Environmental Fate Worksheet
Toluene Environmental Fate Worksheet
Ethylbenzene Environmental Fate Worksheet
Xylene Environmental Fate Worksheet
Appendix A Site Assessment Lab Reports and Chain-ot-Custody
Appendix B Additional Inlet Wells - Lab Reports and Chain-ot-Custody
Appendix C Contirmation Boring - Lab Reports and Chain-ot-Custody
Appendix D Acceptable Cumulative Soil Contamination Levels - BTEX
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1,() INTRODUCTION
Gasoline impacted soils were discovered during the removal of three underground
tanks in November 1989 at the Pence Petroleum Company facilities at 901 East Truxtun
Avenue in Bakersfield, California, Subsequently, a series of assessment borings were
drilled at the site during several site visits, A gasoline' plume was defined centered at
the eastern end of the former tank cluster, The vertical extent of the plume was
determined to be approximately 120 feet below grade while laterally significant
contamination was interpreted to extend 25 to 30 feet from the plume's center,
although hydrocarbons were detected in borings beyond those limits. Published data
indicates first groundwater under the site at a depth of approximately 200 feet.
Remediation was initiated by AquaGeosciences, Inc. in October 1991 with the
installation of four vapor extraction and/or inlet wells, each screened through a section
of the impacted soil interval. The wells were eventually connected to a vapor
ex1raction system (VES) utilizing an internal combustion engine (IC) to provide the
motive power to pull vapors from the wells and which used the vapors as fuel.
Catalytic converters provided air pollution control and supplemental propane fuel was
used as required in the latter stages of remediation. Additional vapor extraction/inlet
wells were installed In October 1993 to enhance the efficiency of the system and by
early 1994 decreasing influent concentrations and increased propane usage signaled
the end of the remediation process.
A confirmation boring was drilled at the center of the most impacted area to a total
depth of 110 feet in May 1994. Samples were collected at five foot intervals and all
were chemically analyzed for BTEX and TPH as gasoline. Gasoline constituents were
detected in most samples, but at concentrations considerable reduced as compared
with pre-remediation levels. The analytical results were used to prepare risk analyses
for groundwater and human health (due to inhalation of potential vapors reaching the
suriace) because of the hydrocarbons left in place, The results indicated minimal risks
and site closure was recommended in a Closure Report dated June 1994. This
recommendation was accepted by the Kern County Department of Environmental
Health Services, however additional analysis, particularly of the consequences of the
remaining TPH concentrations was requested, This report is a revised and expanded
copy of the original submitted addressing those concerns.
2.0 BACKGROUND
Three underground gasoline tanks (one 10,000 gallon and two 6,000 gallon
capacities) and an associated dispenser island were removed from the subject site in
November 1989, The tanks were located adjacent to one another elongated in an
east-west direction in the center of the property. Chemical analyses of preliminary
assessment soil samples which were collected beneath the tanks and dispenser
indicated very elevated gasoline concentrations centered at the east end of the central
and northernmost tanks (Table 1).
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TABLE 1
Summary of Laboratory Analyses
Tanks and Fuel Island Removal
November 1, 1989
(Soil in ppm)
~PLE LOCATION Benzene cfuene Xvlenes Ethylbenzene IEl:fLgl
South tank east end
P1-2' 0.28 4.17 42.98 5.20 534.09
P2-6' NO 0.38 8.51 0.84 127.88
South tank west end
P3-2' NO NO 0.84 0.09 47.60
P4-6' NO NO 0.24 NO 27.90
Center tank east end
P5-2' 23.81 350.69 888.24 88.56 4550.10
P6-6' 58.81 588.24 1543.82 213.32 8843.63
Center tank west end
P7·2' NO ND NO NO NO
P8·6' NO ND 0.72 0.05 31.52
North tank east end
P9·2' 2.40 48.95 222.26 14.10 1719.31
P1D-S' 10.63 136.03 630.24 53.35 3491.08
North tank west end
P 11-2' NO 0.10 0.33 0.02 6.93
P12-6' NO 0.03 0.16 NO NO
Dispenser west end
P13-2' NO NO 0.11 NO 11.85
P14-6' NO ND NO NO NO
Dispenser east end
P15-2' NO NO NO NO NO
P16-6' ND 0.54 2.32 0.26 65.55
TESï ME"T1;OD: TPH as gasoline by DHS LUFT Method 8015m and BTEX by EPA Method 8020
Minimum BTEX 0.03 ug/g
Reporting Levels: TPH 5.0 ugIg
NO Non-Detected
A site assessment by Associated Soils Analysis 1 was subsequently conducted
b,etween July and November 1990, Four borings (82, 83, 83A and 84) were advanced
to a maximum depth of 120 feet below grade and selected samples from each boring
were chemically analyzed (Table 2), 8ecause of drilling difficulties, the contaminant
plume was not fully defined, Twin borings 83 (81,S TD) and 83A (120 feet TD) located
near the center of the most impacted area at the east end of the former north tank
assessed the vertical extent of the contamination, Elevated gasoline concentrations
(maximum benzene - 370 ppm and TPH as gasoline - 24,000 ppm at a depth of 51
feet) were encountered from the surface to 80 feet, while low but detectable
concentrations persisted to total depth. Very low 8TEX and TPH (gasoline),
concentrations were reported in samples collected between 36 and 51 feet in boring
82 (TD 51,5 feet) drilled at the center of the former south tank location. 80ring 84 was
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siteid at the southwest corner of the property approximately 65 feet from 83. Sampling
and field monitoring of hydrocarbon volatiles began at a depth of 60 feet and.
continued to a total depth of 120 feet. Field evidence of hydrocarbons was noted
through this interval, but analysis of selected samples indicated very low
concentrations between 60 and 105 feet below which no hydrocarbons were detected,
TABLE 2
Laboratory Results of Soils-Associated Soils Analysis Inc. Investigation
July 9 & 10 and November 6 and 7, 1990
~ Dfuilll Benzene cluene Ethylbenzene ~ IEtl
82 11 NO NO NO NO NO
B2 16 NO NO NO NO NO
82 26 NO NO NO NO NO
82 36 0.013 0.028 NO 0.0178 NO
82 51 0.29 0.49 0.030 0.179 5.2
B3 11 3.1 49 13 184 1800
B3 31 21 340 78 480 4200
B3 51 370 2000 400 2430 24000
B3 71 340 1600 350 12080 18000
B3 31 44 370 97 600 4700
B3A 90 0.061 0.006 0.069 0.022 0.54
83A 95 0.073 0.062 0.38 0.31 2.2
B3A 100 0.008 0.006 0.023 0.018 NO
83A 105 0.032 0.32 0.17 0.16 1.3
83A 110 7.0 t>l) 11 NO NO
B3A 115 0.01 0.01 0.042 0.05 0.62
B3A 120 0.041 0.052 0.28 0.27 2
B4 75 0.078 0.009 ND 0.023 NO
84 85 0.18 0.19 0.025 0.057 0.82
84 95 0.38 0.05 0.22 0.18 2.0
84 105 0.3 0.35 0,13 0.11 1.5
84 110 ND NO ND NO NO
84 115 NO NO ND NO NO
84 120 ND NO ND ND ND
All results in milligrams per kilogram (ppm)
ND ., Not Dell9ctsd
AquaGeosciences, Inc, (AGI), in August 1991, continued the site characterization
activities and simultaneously initiated remediation by constructing vapor extraction
wells in the assessment boreholes, Four vapor extraction system (VES) wells were
constructed using two-inch PVC casing, each screened through a section of the
impacted soil interval. Selected soil samples were collected and analyzed (Table 3).
VE-1 was drilled at the east end of the former south tank to a depth of 105 feet.
Elevated photoionization (PID) readings were reported from the 5 feet to 90 feet. The
well was screened between 65 and 95 feet, an interval in which analysis of samples
indicated high gasoline concentrations (12,910-17,220 ppm TPH). VE-2 was placed at
the east end of the former center tank, Impacted soils were penetrated between 15
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feet and and a total depth of 80 feet. The well was screened between 40 and 80 feet.
VE-3 was installed near the center of the former dispenser island north of the former·
tank cluster. and was screened between 10 and 40 feet. The final well, VI-1, was
located 10 feet northeast of VE-3, a point approximately 20 feet from the plume's
center, however, field screening and analytical results from selected samples
demonstrated the presence of high gasoline concentrations (5105-15,000 ppm TPH-
gasoline) from 25 feet to a total depth of 70 feet. This well was designed to function
primarily as an air inlet well with the perforated interval between 25 to 65 feet.
~
Laboratory Resu~s of Soils-AquaGeosciences Inc. Investigation
August 21 through 30, 1991
ß.Q.dng. .QÐgth Benzene cluene Ethylbenzene ~ :œI:i
VI-1 2f· 183.750 421.220 82.105 984.220 15000
VI-1 40 73.505 168.210 31.215 492.015 6625
VI-1 55 91.875 210.000 42.310 615.010 7420
VI-1 70 61.250 140.000 27.010 322.975 5105
VE-1 65 200.335 505.075 92.015 1105.125 17220
VE-·1 85 147.310 323.015 52.710 779.875 12910
VE-·1 100 0.995 1.210 0.275 4.225 125
VE--1 105 NO NO NO ND ~I)
VE-2 35 0.335 1.010 0.105 2.220 120
VE-2 50 12.220 28.885 5.500 103.775 1850
VE-2 60 2.210 9.055 0.875 12.150 375
VE-2 8.0 NO NO NO ND 30
VE-3 10 NO NO ND 0.105 80
VE-3 15 1.115 20.210 0.725 9.990 320
VE-3 20 11.775 26.210 3.330 88.845 1250
VE-3 30 17.200 50.270 7.710 161.075 1825
All u~su~s in milligrams per kilogram
ND ., Not Detected
Vapor extraction commenced under permit from the Kern County Air Pollution Control
Oistrict in August 1992 using a modified VW industrial liquid cooled internal
combustion engine equipped with exhaust emission catalysts, Fuel for the engine was
provided by the hydrocarbons drawn from the wells by the inductive action of the
engine itself. This system operated until mid 1993 when continued high influent
concentrations, lack of supplemental propane fuel usage and the presence of gasoline
condensate in the knockout chamber indic.ated the need for improving efficiency of the
system, The installation of three additional YES wells was proposed and
subsequently the wells were installed in October 1993, The wells were located
approximately 30 feet southwest (VI-4), southeast (VI-5) and northeast (VI-6) from the
center of the most impacted area at the east end of the former north and center tanks,
VI-4 was advanced to 96,5 feet and was screened between 50 and 95 feet; VI-5 was
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drilled to 41,5 feet and was screened between 10 and 40 feet, whereas VI-6 reached a
total depth of 81.5 feet and the perforated interval was placed between 30 and 80 feet.
Each wellhead was equipped with a valve allowing the well to be used for extraction
or as an inlet for outside air; the latter being the primary function. Selected samples
were collected for chemical analysis during drilling of these additional well (Table 4).
Elevated gasoline concentrations were detected particularly in the case of VI-5 (810-
5200 ppm TPH-gasoline) although levels notably of the BTEX components were
considerably lower than in previous sampling at the site reflecting remediation
activities and the location of the borings away from the core area of the plume,
:::::::::::::::;:~:::::::::::::::::::::::::::::~::~::~:~:~:::I:::::;::::::;::::::::~::~~;:::;:::;':~::::I::~:::::::~::::::::;:~:::::::::~:::~:::::~:~:TABLE4:~;';:::::;::::~:::::::;:~::::::::::::::::;::::::;:::::::::::::::::::::::::::~::~;;:::~::::::;::;::::;::::::::;~;:::~:::::::::::::;;:::::j::::::~:~::::::::::::::':~:;:::::::::::::'::~:~::::::::::::::j:::::::::~~:::::::::I
SUMMARY OF lABORATORY ANALYSIS
OF SOIL SAMPLES FROM SOl L.S INVESTIGATION·
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Ethvl Total
Borina Sample OeDth(ft) Benzene Toluene Benzene Xvlene TPH (Gas
V I - 4 V - 4 - 3 5 3 6 - 3 6 5 NO NO NO NO 3 1
V - 4 - 4 5 4 6 - 4 6 5 0 1 2 0 53 0 3 2 1 0 2 0 0
V - 4 - 5 0 5 1 - 5 1 5 NO NO NO NO NO
V - 4 - 6 0 6 1 - 6 1 5 0 78 2 0 NO 4 3 1 0 0 0
V - 4 - 6 5 6 6 - 6 6 5 NO NO NO NO NO
V - 4 - 7 0 7 1 - 7 1 5 0 0 23 0 0 2 2 NO 0 02 1 0 7
V - 4 - 8 5 8 6 - 8 6 5 NO NO NO NO NO
V - 4 - 9 5 9 6 - 9 6 5 NO NO NO NO NO
V I - 5 V - 5 - 1 5 1 6 - 1 6 5 NO 0 33 0 74 3 9 8 1 0
V - 5 - 2 0 2 1 - 2 1 5 NO 2 3 3 2 9 5 9 1 0
V - 5 - 3 0 3 1 - 3 1 5 0 2 3 7 2 .5 1 1 1 2 0 0
V - 5 - 4 0 4 1 - 4 1 5 NO 1 0 NO 2 2 5 2 0 0
V I - 6 V - 6 - 2 5 2 6 - 2 6 5 NO NO ND NO ND
V - 6 - 3 5 3 6 - 3 6 5 NO NO NO NO NO
V - 6 - 4 0 4 1 - 4 1 5 NO NO NO NO 1 8
V - 6 - 4 5 4 6 - 4 6 5 NO NO NO 0 0 1 0 5
V - 6 - 5 0 5 1 - 5 1 5 NO NO NO NO NO
V - 6 - 5 5 5 6 - 5 6 5 NO 0 0 0 9 NO 0 0 1 5 3 9
V - 6 - 7 0 7 1 - 7 1 5 NO NO NO NO NO
V-6-80 81-81.5 NO NO NO NO NO
By early 1994, the operation of the IC engine could not longer be continued without the
almost exclusive use of supplemental propane indicating a reduction of influent
concentrations, On May 18, 1994 a confirmation boring C-1 was drilled to a depth of
6
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110 feet at a location at the east ends and between the former north and center tank,
the center of the plume, Samples were collected and analyzed from 5 foot intervals
throughout the length of the boring. Although elevated hydrogen flame ionization
(FID) readings were recorded, analytical results demonstrated a significant decrease
in gasoline concentrations, particularly in the BTEX constituents compared with pre-
remediation results (maximum benzene - 1.5 ppm änd TPH-gasoline - 3000 ppm).
These results were presented with an analysis of risks to groundwater resources and
an analysis of inhalation risks to people from vapors emanating upwards from the
impacted soil mass in a Closure Report dated June 1994. Both risks to groundwater
and human health were interpreted to be minimal. No further action was deemed
necessary and site closure was recommended, The Kern County Environmental
Health Services Department by letter dated June 27, 1994 accepted this
recommendation provided the VES system was dismantled and all wells were
properly abandoned, This has now been accomplished, Subsequently, due to
lingering concerns regarding the still elevated TPH concentrations remaining at the
site, additional analysis was requested. The following revision to the Closure Report
addresses these concerns
3.0 SITE DESCRIPTION
The site, known as Pence Petroleum Company, is located at 901 E. Truxtun Avenue, on
the southeast corner of East Truxtun and Beale Avenues in Bakersfield, California
(Exhibit 1). The property parcel number is APN 017-160-07-00-0,
The property is currently unoccupied and was formerly operated as Pence Automated
Fuels by the Pence Petroleum Company, Prior to 1986, the site was owned by Davies
Oil, Bakersfield, California, and was used as an automated cardlock fueling station,
Exhibit 2 shows the former locations of the site facilities, as well as the former borings
and existing wells,
The property is situated to the south-southeast of downtown Bakersfield, Land use
surrounding the site is varied in nature ranging from Light and Service Industrial to
High Residential as indicated by the Metropolitan Bakersfield 2010 General Plan - East
Map (3-7-90, updated 10-14091), On three sides (north, west, and south) the site abuts
public streets (East Truxtun, Beale, and East 18th Street, respectively). To the east, at
985 East Truxtun, is Signet Hardware, Inc, Residential areas lie to the south and
southeast of the site,
4.10 SITE GEOLOGY
Soil borings at the site penetrated a sequence of unconsolidated sediments to a
maximum depth of 120 feet below grade, The unconsolidated soils are Recent non-
marine flood-plain fan deposits (California Division of Mines and Geology, 1964) 2.
The stratigraphic section consists of alternating dense to very dense silty sands and
sandy silts with interbedded clay and poorly graded sand. The soils moisture content
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varies between dry to moist, predominately slightly moist.
No free standing ground water was encountered during the various field
investigations, Published data (Kern County Water Agency, 1991) 3 show that
groundwater occurs beneath the site at a depth between 200 to 250 feet (bsg) with a
gradient to the south and southwest. .
5.0 FIELD ACTIVITIES
AGI drilled one (1) confirmatory boring in the middle of the preexisting plume to show
that soil has been remediated to reasonable levels given the depth to groundwater at
this site. Boring C-1 was advanced to 110 feet at the location shown on Exhibit 2.
5.1 BORING METHODS
One (1) soil boring, C-1, was advanced using aCME 75 rig with a six inch diameter
hollow stem continuous flight auger in accordance with ASTM Method D-1452-80 for
soil investigations and sampling by auger borings, The augers were steam cleaned
prior to advancing the boring, The lithology and other pertinent data was recorded on
field boring logs in accordance with Method D 2488-84 for visual description and
identification of soils, Soil generated during the drilling process was placed on
Visquene at the site while waiting for analytical confirmation. Analytical results
indicate the cuttings were impacted so this soil will be remediated on site using
aeration and/or bioremediation. A cement slurry was used to abandon the borehole,
5,2 SOIL SAMPLING
Soil samples were collected through the auger in 2-inch diameter brass sleeves
driven in a split spoon sampler by a 140 pound hammer with a 30-inch drop in
accordance with ASTM Methods D1586-84 for split-barrel sampling of soil and D1587-
83 for thin-walled tube sampling of soils. The brass sleeves and sampler were
washed in Alconox prior to each use.
Soil samples were taken at depths of 5 foot intervals to a total depth of 110 feet. The
blow counts, recovery, and lithology were recorded on field logs. Lithology was then
described by an experienced environmental' geologist under the direct supervision of
a California Registered Geologist in accordance with ASTM procedure D2488-84
(Standard Practice for Description and Identification of Soils), One brass sleeve with
soil from each interval was sealed with teflon tape, capped, secured with duct tape,
labeled in accordance with EPA protocols, recorded on a Chain-of-Custody form,
placed in a cooler at 40 centigrade, and transported to Halcyon Laboratories, a
California Certified Laboratory with the Chain-of-Custody for the specified analyses,
Appendix C contains the boring log for C-1,
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5.3 FIELD SCREENING OF SOIL SAMPLES
Soil samples were collected using three (3) six-inch brass tubes installed inside a
split-spoon sampler. The middle sample tube was immediately sealed and prepared
for transport and stored in an iced cooler upon collection, The bottom tube was used
for lithologic description and the top tube was used for field screening. The material
from the top tube was placed in a mason jar to approximately 50 percent capacity,
shaken, and stored for a period of 15 minutes, A standard headspace reading will be
collected at this time and noted on the boring log. Field screening was accomplished
using a photo-ionization detector (PID).
5.4 SOIL ANALYSIS
Twenty two (22) confirmation soil samples were sent to Halcyon Laboratories, a
California State Certified Laboratory in accordance with state guidelines and EPA
protocols. All samples were analyzed for Total Petroleum Hydrocarbons (TPH) as
gasoline and volatile aromatics (BTEX) using EPA Method 8015 modified and 8020,
respectively.
6.0 FINDINGS
On May 18, 1994, AGI advanced a confirmation boring, designated as C-1 (Exhibit 2),
to 110' below surface grade. ACME 75 hollow stem auger drilling rig operated by
Soils Engineering Inc. was used. The rig was positioned to the south of the VES unit,
approximately 4 feet from VE-3, Although field indicators of hydrocarbons (petroleum
odor and photo-ionization detector readings of cuttings) appeared high, lab analyses
indicate that the hydrocarbons concentrations present in the soil in the central area of
the plume have been greatly diminished, Table 5 includes analytical results for C-1,
Appendix D contains laboratory reports with the chain of custody,
9
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~ .
..... . ................. ..... .................... ... ............... . ........ ........ .......... ..... ..:.:.:.:.:.:.:.:.:.:.:.:.:.:...:.....:...........;.;.:...:.;.:.:.:.:.:.:.:.:.:.;.:.....:...:...:...:.;.:.:..,:.:.:.:.:.:.:.;.:.:.;.'.:.:.;.:.;.:.;.:.;.:.:.;.:.:.:.:.;......;.;.:.;.:.:.:.:.;.:.:.;.;.:.:.:.:.:.:.:..
....................
..................... ..................... ....................
5' NO NO ND NO NO
10' NO 0,005 NO 0,033 1.2
15' 0.06 0.63 0,68 2,4 1800
20' NO 1.5 1 5,9 520
25' 0.4 3.3 2,5 14 3000
30' NO 2.5 1.7 9.3 1200
35' NO 1.5 NO 1 0 690
40' NO 0.5 NO 7,8 410
45' 0.8 2,1 1.2 7 450
50' 1 2,9 2.6 1 2 1700
-'--
55' 1.5 3,1 2,9 1 1 2300
60' 1 1.8 2,4 3,1 1100
65' NO NO NO 1 100
70' 0,5 1,3 0.8 3.8 380
75' 0,5 1.2 0,7 2.3 130
80' 0,2 0.5 0.2 1,5 80
85' 0,4 1.5 1.4 8,2 1900
90' 0.4 1.3 0,8 5.6 1200
95' 0.2 1 0,6 4,1 650
100' NO NO NO 0,5 40
105' NO 0.005 ND 0,01 NO
11 0' 0.005 0.02 0.01 0,08 6,5
ANALYTICAL MEHTOD: BTEX - EPA METHOD 8020, TPH (G) - 8015M
MINIMUM DETECTION LIMIT: BTEX - 0.5 mg/Ka: TPH (G) - 50 maiKo
maiKo - millioram cer Kilooram (carts cer million - com) I
NO - None Detected I I
7.0 RISK ANALYSIS - GROUNDWATER
The primary objective of the underground tank regulations is protection of groundwater
resources. The State of California through the Department of Health Services and the
State Water Resources Control Soard developed the Leaking Underground Fuel Tank
(LUFT) Manual 4 to provide guidelines to regulatory agencies and other interested
parties concerned with investigation, risk assessment and cleanup of underground
tank related leaks, That document presents two methods to determine if soil
contamination can be left in place without threatening groundwater. The simplest is a
leaching potential analysis for gasoline which evaluates those site characteristics
which influence the downward migration of the fuel components STXE and
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TPH(gasoline) such as; depth to groundwater, precipitation, soil lithology and the
presence of conduits, both manmade and natural (fractures), to determine the
allowable BTXE and TPH concentrations which can be left in place without threatening
groundwater. Using this approach the Pence Petroleum site was determined to fall into
the low leaching potential category, however, several samples from the confirmation
Boring C-1 exceeded the stipulated maximum allowable TPH(gasoline) and BIT/XIE
levels which for the low category are 1000 ppm and 1/50/50/50 ppm, respectively
(Table 6),
For those sites with a value above allowable levels, further analysis using the General
Risk Appraisal is recommended, This is a more sophisticated approach adapted from
two computer simulations to estimate the concentrations of BTEX components which
can be left in place without endangering groundwater, This method also considers the
physical characteristics -of the site as well as environmental fate and chemistry data for
BTEX, The first step is use of a questionnaire to determine whether site conditions do
not present a greater risk to groundwater than those on which the models are based.
An environmental fate worksheet is then completed for each of the BTEX components
(Table 8, 9, 10, & 11). The concentration detected in samples at each successive five
foot interval is added to the sum of the previous concentrations for the total vertical
distance of the plume. The sum at each interval is compared to Acceptable
Cumulative Contamination Levels provided in Appendix E for each aromatic
component to determine if remediation was successful. These tables show distance to
groundwater from the contaminated mass on the vertical axis and annual rainfall on
the horizontal axis,
Use of the General Risk Appraisal for Pence Petroleum appears to be suitable based
on the preponderance of "NO" answers on the checklist (Table 7), Worksheets for the
confirmation boring were then completed to evaluate residual risks to groundwater. A
depth to groundwater of 200 feet was used in the analysis based on Kern County
Water Agency maps,
A complete profile of the present distribution of gasoline hydrocarbons at the center of
the impacted soil mass was provided by analysis of samples collected during the
drilling of confirmation Boring C-1. Samples at every 5 foot interval between 5 and 110
feet were chemically analyzed. At no depth interval were cumulative concentrations of
any BTEX components found to be in excess of Acceptable Levels (Tables 8, 9, 10, &
11), On the basis of this analysis, it can be concluded that the hydrocarbon
concentrations still present at the site do not constitute a threat to groundwater
resources.
Another approach to evaluate the potential for fuel hydrocarbon contaminants to
migrate to the deep groundwater aquifer is modeled after a fate and transport analysis
used by Environmental Science and Engineering, Inc, at a similar site in Kern County5.
This report was provided AGI by the KCDEHS as an acceptable methodology,
1 1
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It can be assumed that 5 years after the removal any source of fuel leaks and after a
period of vapor extraction, downward migration of liquid gasoline hydrocarbons at the
Pence site has essentially ceased, As a finite quantity of bulk hydrocarbons spread
vertically and laterally in the soil column driven primarily by gravity they are eventually
transferred to a state of residual saturation, that is, they are immobilized by adsorptive
and capillary forces acting between the hydrocarbons and the mineral grains of the
soil. Although some diffusion of volatile fractions in the interconnected pore spaces
will occur, further downward movement will be dependent on the action of any
infiltrating water passing through the contaminated soil mass, dissolving a portion of
the adsorbed hydrocarbons, and carrying them downward, Other than possible
manmade sources (irrigation water), precipitation provides the hydraulic loading which
drives this process. The annual amount of soil water percolating downward can
roughly be estimated by the water balance equation (Dragun, 1988) 6:
Q=P-R-ET-dW
Where:
Q = Percolation rate
P = Annual Precipitation
ET = Annual Evapotranspiration
dW = Change in storage in the unsaturated zone
Assuming that dW and R are negligible:
Q=P-ET
For Bakersfield average annual rainfall is 5.74 inches or 14,58 cm (Kern County Water
Agency, 1993). Average annual evaporation as measured at three Kern County
stations is 62.46 inches or 158,65 cm (Kern County Water Agency, 1993),
Evapotranspiration is estimated using a measured Class A pan evaporation rate in the
following formula (EPA, 1988) 7.
ET = EVAP(Cet)(Cveg)
Where:
EVAP = evaporation rate
Cet = Correction factor for converting evaporation rates to
evapotranspiration rates from turf grass.
Cveg = Correction factor for converting evapotranspiration from turf
grass to evapotranspiration from other vegetative cover
types,
Values for Cet (0,5) and Cveg (0,6) were obtained from the EPA (1988) and are based
on moderate winds of 10 miles per hour and relative humidity of less than 60 percent.
12
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Therefore:
ET = (158,65 cm/yr)(0.5)(0.6) = 47.60 cm/yr
By substituting values derived for P and ET into the equation for a, the percolation rate
for the site is calculated:
a = 14.58 cm/yr - 47.60 cm/yr = - 33,02 cm/yr
The negative result indicates no significant percolation of water occurs at the site and
therefore, hydrocarbon constituents are not expected to leach to groundwater.
To insure a conservative analysis, a percolation rate of 1 cm/yr is assumed (this would
require that occasionally annual rainfall totals reach 19,13 in/yr or 48,60 cm/yr), Based
on the site characterization information, approximately 80 feet separate the water table
from the base of the contaminant plume, and therefore, at a 1 cm/yr percolation rate,
over 2400 years would be required for dissolved hydrocarbons to reach groundwater,
To continue the analysis assuming hydrocarbons do occasionally reach groundwater,
the concentration of constituents of concern in percolating water can be estimated by
using the equilibrium solubilty of the constituent (Co) as determined in the following
equation:
Co = Csoii/(Koe)(foc)
Where:
Co = Equilibrium solubilty of the constituent (mg/L)
Csoil = Concentration of the constituent in soil (mg/kg)
Koc = Soil water partition coefficient
foc = Fraction of organic carbon in soil
According to Dragun (1988), subsoils typically possess organic carbon contents of less
than 0,1 percent and therefore, foe of 0.1 percent is used in the calculation, Generally
the presence of organic material in the soil promotes hydrocarbon adsorption, The
BTEX concentrations used are the mean value derived from all samples in which a
particular constituent was detected in Boring C-1, as shown in the following Table,
Constituent Detection Frequency Range Mean Standard Deviation
Benzene 13/22 .005-1.5 ,54 .41
Toluene 19/22 .005-3.3 1.4 1.00
Ethylbenzene 15/22 ,005-2,9 1.3 .92
Xylenes 21 /22 .005-12 5,2 4.3
The values use of Koc are derived from the EPA, 19868. Estimated equilibrium water
concentration for the BTEX constituents calculated using the above formula are listed
in the following Table.
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Constituent Csoil(mg/kg) Koc (Ukg) Co (mg/L)
Benzene .54 83 6,5
Toluene 1.4 300 4,7
Ethylbenzene 1.3 1100 1.2
Xylsnes 5,2 240 21.7
The loading rate or intensity with which bulk hydrocarbons are released from a liquid
to dissolved state can be estimated by the following formula (EPA, 1988):
Lc = (Q)(A)(Co)
Where:
Lc = Constituent loading rate (mg/yr)
Q = Percolation rate (cm/yr)
A = Area of contamination (m2)
Co = Equilibrium solubilty of the constituent
The area of significant contamination based on the assessment findings has a
diameter of approximately 60 feet which equates to an area of 2826 ft2 or 2.6 x 106
cm2, A value of 1 cm/yr is used for percolation rate (0), The loading rate calculated for
each BTEX constituent is listed in the following Table,
Constituent Co (mg/L) Lc (mg/yr)
Benzene 6.5 1.7 x 104
Toluene 4.7 1,2 x 104
Ethylbenzene 1.2 3.1 x 103
Xylenes 21.7 5,6 x 104
The estimated loading rates for BTEX are very low and demonstrate that leaching to
groundwater is insignificant.
To estimate future concentrations of BTEX in groundwater under the Pence site, the
volumetric flow rate of groundwater as calculated using Darcy's equation:
Q = -KiA
Where:
Q = Flow rate (Uyr)
K = Hydraulic conductivity (m/day)
i = Hydraulic gradient (m/m)
A - Cross sectional area of aquifer through which flow occurs (m2)
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A hydraulic conductivity of 10-1, m/sec or 86.4 m/day was selected. According to Fetter-9
this is representative for well sorted sands. A gradient of ,004 ft/ft was used based on
the average gradient between Bakersfield and Arvin as depicted on Kern County
Water Agency maps (1993). The thickness of the impacted upper portion of the aquifer
was assumed to be 32,8 feet or 10 meters and the width of the impacted zone 60 feet
or 18 meters. A flow rate of 2.3 x 107 Uyr was calculated.
Dividing loading rates for the BTEX constituents by the flow rate yields an estimated
maximum concentration as shown on the next Table.
Constituent
Loading Rate (mg/yr)
Estimated Maximum Concentration (mg/L)
Benzene
Toluene
Ethylbenzene
Xylenes
1.7 X 104
1.2 X 104
3.1 X 103
5,6 X 104
7.4 x10-4
5,2 x 10-4
1,3 X 10-4
2.4 X 10-3
Regarding the consequences of leaving TPH as gasoline in the ranges indicated by
the Boring C-1 sample analyses, to the knowledge of AGI there are currently no
models which are applicable to TPH alone. The fate and transport analysis presented
is based on the BTEX components alone because these are relatively simple single
compounds, as compared with gasoline which is a mixture of numerous compounds,
BTEX constituents are also the most soluble and mobile components of gasoline, as
well as posing the highest health risks. Therefore, they they are the most likely
components of gasoline to reach the deep groundwater aquifer, If it can be
demonstrated, as AGI believes it has, that these constituents pose little risk, it can also
be assumed the less mobile TPH constituents do not endanger groundwater
resources as well.
However, to evaluate potential risks associated with TPH as gasoline, a mean TPH
concentration of 882 mg/kg was calculated from the analytical results from the Boring
C-1 samples, Concentrations ranged from 1.2 to 3000 mg/kg, This value was used to
calculate equilibrium water solubilty concentration (Co), groundwater loading rate (Lc)
and maximum groundwater concentration as was done for BTEX. It should be restated
that this is based on a percolation rate of 1 cm/yr which is predicated on an annual
rainfall for the area which seldom occurs, Another factor not considered in thes,e
models is the beneficial effects of biodegradation due to the action of aerobic and
anaerobic bacteria through time, The calculations result in the following findings:
Co = 10, 626 mg/L
Lc = 2,7 X 107 mg/yr
Estimated Maximum Concentration = 1 .2 mg/L
15
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8,0 RISK ANALYSIS - SURFACE ENVIRONMENT
Risks to people and the surface environment from vapors migrating upward from the
contaminated soil masses are also considered to be very low, The affected area at the
former tank location will be overlain by asphalt paving used for parking space for the
business to the east. If left in this condition, little to no risk to human receptors would
exist. The following Risk Assessment for the Surface Environment is performed in the
unlikely event that a building would be placed on this vacant area.
An effort has been made to evaluate health risks due to exposure to benzene
volatilizing from the soil and entering a fictitious building from the plume. Benzene
was used because of its high volatility and known carcinogenic properties, it is
considered to pose the greatest health risks, The highest concentration reported from
the confirmation boring C-1 was 1,5 ppm which was detected at a depth of 55 feet.
This value was used in the calculations, Laboratory determined values for soil
properties required for the analysis are not available, Assuming a sandy
unconsolidated sediment type with a low moisture content, the following parameters
were estimated:
Porosity .35
Bulk Density 2,0
Moisture Content ,15
The approach used for the risk assessment is based in part on the methods and logic
presented in the California Site Mitigation Tree Manuapo and a report by Chemrisk11
submitted to the Orange County Health Care Agency and made available as an
example of a state of the art risk assessment. The steps followed and conclusions of
this analysis are outlined below followed by a complete discussion and the
calculations.
8.1 SUMMARY OF RISK ANALYSIS FOR BENZENE
The first step in the risk evaluation process is the calculation of the steady state flux of
benzene through the soil matrix assuming a non-diminishing source at some distance
below the ground level. This determination requires a knowledge of benzene's
coefficients of diffusion in air and through the soil as well as the vapor phase
concentration of the compound at the source,
Knowing the vapor phase flux through the soil, the volume of air within the building, a
ventilation rate and assuming a leakage rate through a structure's foundation, a
benzene vapor concentration within a building can be predicted, Then, taking a worst
case scenario of a person working their entire 45 year occupational lifetime at the
business, a lifetime average daily dose (LADD) received can be derived,
1 6
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Values of indoor vapor concentrations and LADDs can be compared to regulatory
guidelines to evaluate degree of exposure and risks, In this instance, the indoor
concentration of benzene was calculated to be 2.1 X 10-8 mg/m3, The Department of
Health Services Applied Action Level for benzene in ambient air is 3.2 X 10-3 mg/m3.
The air concentration for lifetime cancer risk due to benzene exposure 6,6 X 10-4
mg/m3 can also be used, Based on an individual who worked at the site for 45 years, a
LADD of 1.0 X 10-9 mg/kg-day was calculated. This result can be compared to 3,0 X
10-4 mg/kg-day which is considered to result in a 1 and 100,000 excess cancer risk
under DHS Proposition 65 guidelines, In all cases, calculated values are well below
established guidelines.
The potential for carcinogenic health effects can also be evaluated by multiplying the
lifetime benzene exposure (inhaled volume times concentration) with an "adjusted
potency factor" (USEP A,1988b)13 to derive a carcinogenic risk associated with a
specific exposure to benzene, In general, regulatory agencies have found that a risk
in excess of 1 and 1 million is acceptable, In some instances risks of 1 in 100,000 are
used in setting environmental standards, At Pence Petroleum a risk of 3.86 X 10-11 was
derived, well below the 1 in 1,000,000 criteria,
In conclusion, based on this risk assessment, no significant health hazards related to
the gasoline contamination at the Pence Petroleum site are believed to exist. The
contamination does not encroach on any proximal building and the site will be sealed
at the surface with asphalt paving,
8,2 RISK ASSESSMENT FOR BENZENE
STEADY STATE VAPOR FLUX
The first step in determining the benzene exposure to occupants is the calculation of
the rate of emission of the chemical from the soil. This rate is influenced by such
factors as the degree of partitioning of benzene between vapor, soluble and non-
aqueous phases, the rate and degree of movement of the various phases through the
soil, soil properties, and environmental factors such as temperature, moisture and
surface conditions, The general approach used, is to take the dominant transport
mechanism, in this case vapor diffusion, and model the process, The model used is
based on one developed to predict emissions from landfills by Thibodeaux and
Hwang14, It assumes steady-state fluxes for a non-diminishing source at a specific
depth below the ground surface, The applicable equations are:
F = Cv Ds
H
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Where:
F=
Cv=
Ov=
H=
Steady-state flux through a soil matrix from a non-diminishing
source - mg/m2-day
Vapor phase concentration of ben~ene at the source - mg/m3
Vapor phase diffusion coefficient through soil - m2/day
Depth below ground surface of the contamination - 15 ft (4.9 m)
Cv = x P M w
RT
Where:
x=
P=
T=
Mw=
R=
Mole fraction of benzene in the free liquid hydrocarbon phase, It is
assumed to be approximately equal to the weight fraction of
benzene in residual 1,5 ppm benzene/2300 ppm TPH. The TPH
value is the concentration at 55 ft.
Pure benzene vapor pressure (atm) at temperature T - 0.10 atm
Temperature (oK) - 298 oK
Molecular weight of benzene - mg/mole - 78000
Universal gas constant - 8,2 X 10-5 m3 -atm/mole-oK
J..&..
C v = 2300 (0.10) (78000) = 207,9 mgfln
(8.21 X 10.5)(298)
The following equations are derived from Millington -Quirk15,
_ (Oa)(a3.33)
Os -
r2
a = E-MB
Where:
Da=
Diffusion coefficient of benzene in air· = 0.71 m2/day, This value
is calculated after Fuller et a 16
Soil air content
Soil moisture content - 0,15
Porosity - 0,35
Soil bulk density - 2,0
Porosity -0.30
a=
M=
E=
B=
T=
18
e
e
a = E-MB = 0,35 . (0.15)(2) = 0.05
(0.71 )(.053.33)
DS = = 9.4 X 10-5 m2/day
.35
Substituting Cv, Ds and H into the equation for steady-state flux:
F = Cv Ds
H
-5
= (207.9)(9.4 X 10 ) = 3.9 X 10-3 mg/m2-day
4.9
BENZENE CONCENTRATION IN INDOOR AIR
Knowing the vapor flux through the soil, an estimate can be made of the concentration
of benzene in the indoor air of the fictitious building which might contains a volume of
approximately 8600 ft3 (244 m3) given the space available. Benzene reaching the
surface under the structure may enter the building through openings in the floor, for
example, cracks, joints and loose fitting pipes, The ratio of leakage to total floor area
in the average California home is 2 . 10 cm2/m2 of floor area (Grimsrud et al )17,
Commercial buildings built on concrete slabs would experience less leakage than
residences with crawl spaces, therefore, the lower value of 2 cm2/m2 is used in this
analysis,
The ventilation rate for the building is based on studies of Fisk et a118. They estimated
that the average air exchange rate for residences at 0.5 . 0,9 air changes per hour,
The most conservative low end value 0.5 is used, A retail business with numerous
customers entering and leaving and equipped with modern ventilation systems would
experience much higher exchange rates,
The concentration of benzene in the indoor air is predicted by the equation:
FA
Cb =-
Q
Where:
F --
--
Indoor air concentration of benzene due to volatilization from the
soil . mg/m3
Vapor flux through openings in the foundation - mg/m2. hr
3.9 X 10-3 mg/m2-day X 1 day/24 hr = 1.6 X 10-4 mg/m2-hr
Cb=
19
e
e
Q=
Leakage area = 2 cm2/m2 =0.0002 m2 openings/m2 floor area X
100 m2 floor area = 2.0 X 10-2 m2
Ventilation rate in building - m3thr = 0,5 exchange ratethr X 304 m3
building volume = 152 m3/hr
A=
Cb = (1.6 X 10.4)(2,0 X 10-2) = 2.1 X 10-Smg/m3
152
RISK BY EXPOSURE
In order to estimate the health risks associated with exposure to benzene, a very
conservative approach was used based on a individual working at the business for an
entire occupational lifetime of 45 years, 5 days a week and 50 weeks a year with an
inhalation rate of 10 m3/hour.
Total lifetime inhaled volume = 1,13 X 105 m3
Average daily volume = 4.4 m3/day
Exposure is the product of contaminant concentration (Cb) and the air volume
breathed calculated by the following equation:
LADD = Cb AB
Bw
Where:
LADD =
Cb=
A=
B=
Bw=
Lifetime Average Daily Dose - mg/kg-day
Concentration of benzene in air = 5,5 X 10.8 mg/m3
Inhalation bioavailability (fraction of benzene inhaled) -
100%
Average daily volume inhaled = 4,4 m3/day
Body weight = 70 kg
LADD = (2.1 X 10 ,s)(1 )(4,4) = 1.0 X 10-9 mg/kg-day
70
The carcinogenic risk associated with a specific exposure can be estimated by the
following:
R=P'E
20
e
e
Where:
R=
p'=
E=
Risk associated with a specific exposure
Benzene adjusted potency factor [mg/lifetime exposure]-1 =
1.63 X 10-8 per USEPA 1988 - derived from
epidemological studies on cancer induced leukemia,
Exposure = inhaled volume M3 X concentration
R = (1.63 X 10.8)(1,13 X 105)(2.1X 10 -8) = 3.86X 1011
9.0 RECOMMENDATIONS
Based on the information obtained and analyzed from confirmation boring C-1, risks to
groundwater resources and public health are considered to be extremely low, No
further assessment or remediation of the site is deemed necessary and site closure is
recommended,
10.0 LIMITATIONS
AquaGeosciences, Inc. performed this investigation in accordance with generally
accepted standards of care which exists in California at this time, It should be
recognized that definition and evaluation of geologic conditions is a difficult and
inexact science, Judgments leading to conclusions and recommendations are
generally made with limited knowledge of the subsurface conditions present. No
warranty expressed of implied, is made.
11.0 REFERENCES
1. Associated Soils Analysis, Site Assessment Study for Petroleum Constituents
Present in Soil at Pence Petroleum Company 901 E. 19th Street, Bakersfield,
California, December 28, 1990
2. Smith, A. - complier, Geologic Map of California. Bakersfield Sheet, State of
California, Department of Conservation, Division of Mines and Geology, 1964
3, Clark, Thomas N. - General Manager. Kern County Water Agency Water Supply
Report 1990, September 1991
4. State of California Leaking Underground Fuel Task Force, Leaking
Underground Fuel Tank Manual: Guidelines For Site Assessment,
Cleanup and Underground Storage Tank Closure, October 1989
5. Environmental Science & Engineering, Inc, Additional Site Assessment, Fate
and Transport Analysis, and Risk Assessment Report, Arkelo Ranch
Headquarters, Kern County, California, June 24, 1993
21
e
e
6, Dragun James, The Soil Chemistry of Hazardous Materials, Hazardous
Materials Control Resources Institute, 1988
7. United States Environmental Protection Agency. Superfund Exposure
Assessment Manual, Office of Remedial Response, OSWER Directive 9285.5-
1,1988a
8. United States Environmental Protection Agency: Superfund Public Health
Evaluation Manual, Office of Emergency and Remedial Response, Washington
DC, OSWER Directive 9285.4-1
9. Fetter, C.W Applied Hydrogeology, 2nd Edition, Merrill Publishing Company,
1988
10, State of California Department of Health Services Toxic Substances Control
Division, Alternative Technology and Policy Development Section, The
California Decision Tree Manual, May 1966
11, Chemrisk, Screening Level Risk Assessment for Benzene, Toluene, Xylene and
Ethylbenzene in Indoor Air at the Former Shell Gasoline Station at Cost Mesa,
September 19, 1989
13, U,S, Environmental Protection Agency, Update of the Risk Characterization
Tables in SPHEM (Toxicity Data for Potential Carcinogenic Effects and Non-
Carcinogenic Effects), 1988b
14, Thibodeaux, L. J, and Hwang, S. 1: Landfarming of Petroleum Wastes-
Modeling the Air Emission Problem: Environ, Prog" 1982
15. Millington, N, J, and Quirk, J. M. Permeability of Porous Solids: Trans. Faraday
Soc. 57, pg, 1200-1207, 1961
16. Fuller, E. N., Schettler, p, D., and Giddings, J, C, A New Method for Prediction of
Binary Gas Phase Diffusion Coefficients: Ind, Eng, Chern, 59, pg, 19-27, 1966
17. Grimsrud, D,T., Sonderegger, and Sherman, R.G, A Frame work of a
Construction Quality Survey for Air Leakage in Residential Buildings:
Proceedings of Thermal Performance of External Envelopes of Buildings, pg.
442-452, 1983
18, Fisk, W J" Spencer, R. K., Grimsrud, D, T., Offerman, F. J., and Sextro, R. Indoor
Air Quality Control Techniques: Radon, Formaldehyde, Combustion Products:
Poliution Tech. Review No. 44: Noyes Data Corp
22
e
e
TABLES
Leachin(~f' PÕtëi1tlál-Xnålÿ-S-iš- -{õr ·-ëãsoi. ine--änd Diesel
Using Total Petroleum Hydrocarbons(TPH)
and Benzene, Toluene, Xylene and Ethylbenzene (BTX&E)
4De following table was designed to permit estimating the
concentrations of TPH and BTX&E that can be left in place without
threatening ground water. Three levels of TPH and BTX&E
concentrations were derived (from modeling) f~r sites which fall into
categories of low, medium or high leaching potential. To use the
table, find the appropriate description for each of the features.
Score each feature using the weighting system shown at the top of
each column. Sum the points for each column and total them. Match
the total points to the allowable BTX&E and TPH levels.
,
S SCORE S SCORE S SCORE
SITE C 10 PTS' C 9 PTS C 5 PTS
0 IF CON- 0 IF CON- 0 IF CON-
FEATURE R DITION R DITION R DITION
E IS MET E IS MET E IS MET
Minimum Depth to >100 51-100 25-50\.1
Ground Water from the 10
Soil Sample (feet)
Fractures in subsurface 10 None Unknown Present
(applies to foothills
or mountain areas)
Average Annual· <10 10-25 26-40~
Precipitation (inches) 10 -
-
I
Man-made conduits which None Unknown Present
increase vertical 10
migration of leachate
Unique site features: None At least More
r~charge area, coarse 9 one thàn one
soil, nearby wells, etc
I COLUMN "TOTALS-+TOTAL PTS I 40 + 9 t + 0 = 149
RANGE OF TOTAL POINTS 49pts or more 41 - 48 pts 40pts or less
MAXIMUM ALLOWABLE 1/50/50/50' .3/,3/1/1 NA\.I
B/T/X/E LEVELS (PPM)
MAXIMUM GASOLINE 1000 100 10
ALLOWABLE TPH :
LEVELS (PPM) DIESEL 10000 1000 100
I
\.
I
AQuaGeosciences. Inc.
~ 701 Westwind Drive Suite 101
.akersfteld, California 93301
I T~~{80S)32~962
fax 328-1129
IPæm~ IPætbNDllæuil1ID.
KERN COUNTY, CALIFORNIA
TABLE
6
Leaching Potential Analysis
F --
I
,
GENERAL RISK APPRAISAL ;
FOR PROTECTION OF WATER QUALITY:
APPLICABILITY CHECKLIST YES NO
. 1. Is the site in a mountainous area? (shaded moist ,
X i
areas &/or areas with rocky subsurface conditions)
2. Is the site in an area that could collect surface
runoff or intercept water from a source other than
the natural precipitation? X
3. Does the areal extent of soil contamination
exceed 1000 feetZ? X
4. Do the concentrations of fuel constituents in any
soil samples exceed the following amounts: .
benzene - 100 ppm, toluene - 80 ppm, xylene - 40 X
ppm, ethylbenzene - 40 ppm?
5. Are there any records or evidence of man-made or
natural objects which could provide a conduit for X
vertical migration of leachate?
6. Do any boring or excavation logs show the presence
of fractures, joints or faults that could act as a X
conduit for vertical migration of leachate?
,
7. Do any boring logs show that contaminated soil X
I -
could be within 5 ft. of highest ground water?
.
8. Do any boring logs show the presence of a layer of
material, 5 ft. thick or more, which is more than X
75% sand and/or gravel?
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 101
Bakersfield, California 93301
I T~eph~:(805)32~962
Fax 328-1129
JPœm~ JPœtlJN)ilœ!Jil1D1
KERN COUNTY, CALIFORNIA
TABLE
7
General Risk Appraisal
Ii
01 S-TMtE FRa4
SURfACE TO
GI OOkD UA'JER
..
1..2-0..0. f t
/
. rA8lE 2,) ~
ENVIRON At FATE ~KSHEET ,at RAn 7.An A ..<FU""ST rrUENf)
Table 8
Pence Petroleum
C
D
E
CUHULArlVI:.
CaNT Al41 NA TlON
lEVelS C .C. L.
SOIL SURFACE
SAMPLE ,ND
= C.C.l. L-.
.. ~~P~È ~o.__... I~·III
= C.C.L. 2--
C.C.L. 2 .
.. SAMPLE :sO _ 06 r,fA
= C.C.l. 3Q.:-Ò~6 .
C.C..l. :5
. SAMPLE ~_º _ ppn
= C.C.L. "0 __06._.
C.C.l. " .
.. SAMPLE sQ.~4__ ~> -Ja
~ C.C.L. '>CL..A6---
C.C.l. 5
.. SAMPLE ~-º-:.....P ~"
= C.C.l. t.() ~46_ _.
C.C,l. 6
.. SAl4PlE;¡ND PJ.1D
= C.C.L, ~4Jl____
C.C.t. 7
.. SAI'IPLf ~~n
= C.C.l. 8.0--4-6-__
C,C.l. 8
.. SAMPLE 9 0 . 8 ppn
= C.C,L. 91. 2é
C.C.l. 9
..SAMPLE 10 1, 0 ppn
=C.C.L. to 2. :2 é
C.C.L. 10
..SiWllE 111, 5 ppn
=C.C,L. 111 76
C.C,l, 11
. "SAMPLE 121.0 ppn
=C,C,l. 124 ~ 7.(;
...
J- A
f AVERAGE ANNUAL
r PIIECIPI TATfOtl S
. ___INCHES
.' .-.-" ----..-.
I I I I I I I I , I I I I I
i I I I I I I I I I I I I I
f C
tCCEPIAUl~ CLEANUP?
UJtHAHINAflON YES IF E >- F
LEVELS NO IF E S F
_H·UI
yc!> ~~C.no
..
..... ......... .............: ........................:.......;......,....................................................... ................. '" ," . ", ,".. . ... . . ".. ..... .,. ..... p' .......
l --
_ ~ . _ '::::" ___ . _ _..""_ . ~.:L-
~.':;~--1 .:..-~ ~".-_-~.:; _ -_.~ ____.;~.-, ~:_··~-;~t~~:g~J.ç~~~.:~~_·.·~~-~.--;- i:;~~--- .~~~~: -.~ -~---. :-
. . . -; _Sft 1·-::.·:
. ::-..':- .. 3'5··· 165 .
.'. _ y___)i: SAMPLE 7 _'t
.;,L. .:::":'::.:....
Sft I ... ..
. Y 40': ¡:t -·;·SAM~~E 8 ~ft
,L
Sft
45
Y_ft
..' .. :..,~ ....... ..
···:::-5f~I:·::>/}( :::
,-- 0 . .6:0,...:..... ..:....:.,.... :..' _ .
.;.-. : ::~: ;.: ~::.:.:::::.:.~-;.·t.::;\:::£).:;::.:-}\:~t:!}.:.{rl::~iIIf~i;~\~::~:.:: . .:- '. _ .-...- .
::.:.:-" . :-:·:-:·i· :::'-::-:':'.. .. .-...:-:-~:...:.:.... ;.:.;.::.::.......:.:-:.:::: -.. :.::.:-:.:...::.:.:.:.:..: :.: ;.;.:.:.:: -:: .-. :::... -:.:- .-.-- . '. : ..... .
.. .-....
.. -- .. -.- -
------
. __yes X-no
ft . feet ppII '" parts per .,ll ion
. NOTE: CCllCE) TRATlONS FOR AMY SINGLE SOIL SAMPLE (ANNOT EXCEED 100ppn fOR BENZENE, 80ppn fOR TOLUENE, 100ppll FOR X'flUE
AND 100ppm FOR ETMYLBE) ZENE IN ORDER TO Be USED WITH THE CENERAL RISK APPRAISAL,
THE LAST SAMPLE TO Be I) ClIJlED IN THe CALCULATIONS FOR CUMJlATIVE CONTAMINATION MUST SE AT OR ABOVE THe
OETECTION LIMIT; DO NOT INCLUDe BOTTOM SAMPLES WHICH HAVE CONCENTRATIONS LESS THAN THE DETECTION LIMIT,
DISTAHCE fRa4
SAMPLE TO
SURFACE
DISTAHce fRa4
SAMPLE TO
GROOHt) UA T ER
..
5 ft SAMPLE 1 19_~ t c
..
Sft I ~~~..ft
,,10 It SAJoIPLE 2
...
S fc I
,,15 It SAMPLE 3 185_ft
...
5ftl
20 ft SAMPLE 4 180 ft
Y
...
5ftl
25 SAMPLE S 175 ft
Y_ft
~
Sftl . ....
. 30 ft SAMPLE 6 170 ft
"
... .-.
SAMPLE 9
155 ft
....
.. .
Sft ~:6- fi: SAMPLE 10 150 It
Y
-
'.:'" ..c.
5 ft 15~ 145
" It SAJoIPlE 11 ft
- -
42
_lQ.9..º_
_ye" Lno
1000
.- -- -. -..-
__yc.... X _no
1000
........ --"'-
_. ..'fc... Ln.'
__100.º-_.
_yes Lno
1000.-
_yes Lno
1000
yes X no
1000
yes Lno
1000
_yes Lno
1000·
_yes ~no
1000
_.~Ÿes_-X_no
. ....."...:..:...:.: .... .'.: ::.:...... .;..;..... "';":;"':':.'
.. .... .................. '.' ....
. .' .............. ........ .....
It
D J $.r AJlC;E F Raf
WRfACE TO
CI!()Jk[) UA'JER
12Q Q_.f t
I
- .
..
...
...
..
".
'-
..
. TABLE Z·J ~
ENVIRONM AL FATE UOIIKSHEET '01( Benzene ..cfU~STITUEHT)
Con t.
i
Table 8 Cont.
Pence Petroleum
C
D
E
r-IAVERAC: ANNUAL
r PRECIPITATION
I ..... -::-~.-=-:.I.~CHE~__~
/ / I I I / I I I I I I I I
i I I I / I I I I I I I I I
f G
. ... ........ ................ ...... . ..."................ .... .. ..... -". .,.. .'
. ¡ - - - -
~ -~~_:-F-~--=-" ~ -_~~:-;~ : ---~~ ~-=~.,---¿-- ~~-:-~;~È~~~~~~~~;----~,~==~~-~¡;-~: : - .
~
5 f t I . 13.9f c
.70 ft S.vIPlE 2
---
,\
5' t I 12Stt
~B ft SA>lPLE 3
,\
'5f t I 12O,t
~O ft S.vIPLE '-
,\
5 f t I 11Stt
~5 It SAMPLE S
-
... ,\
..' Sft~ . ..
....
. .
- 0 ft SAI4PLE 6 11O,t
... . . ..
..- Sftk'::'-: -:.
. -
. 5' 10 5,~
__jt SAMPLE 7
....... ..::.-....:......
5i.tho:OH - .: SAI4PLE 8 10 Ütt
...
Sftl 9S
~O 5 ft SAI4PlE 9 - ft
.... ..
Slt : ..- . .... 90
. ~ .-. .'
. . .
" ~10 t-t '.
SAMPLE 10 - ft
..... . -. " ..
Sftl
y ft S»IPlE 11 ft
- -
..
.... ....
..... .. .......... ·.·.·<..·¿!éi.;:;:~t:~;:·tt;;,\:s:~;,i:, ............ .: '.. ..
<- . yo . :::::: .:': :.;::';::':-:':._ - - :'-'-:::;:-:::;::;-.:' ·:::::·:::":;·:-;:;:;:::::.:.:·:··.:::::::X;·::.::~:;::::-_:_::: :::::::;: -.::....._:.:_:" .:X.·:·:·.::: :. -._-
ft :0 feet ppnI :0 parts per .i II ion
· NOTE: CONC!JITItATlONS Fœ AMY SINGLE SOil SAAPlE CANNOT EXCEED 100ppa FOR BENZENE, 80ppm FOR TOlUEME, 40Wl' Fat X'I'lENE
ANO 40ppm Fœ ETKYlBENZENE IN ORDER TO BE USED WITH THE CENERAL RIS~ APPRAISAL.
THE LAST SAMPLe TO se INCLUDED III THE CALCULATIONS FOR CUMULATIVE CONTAHJIIATION MUST BE AT OR ASOVE THE
DETECTION liMIT; DO NOT INCLUDE SOTTOM SAMPLES WHICH HAVE CONCEMTRATIONS LESS THAN ThE DETECTION LIMIT,
DISTANCE FRCH
SAI4PLE TO
SURFACE
DISTANCE fRCH
SAMPLE TO
GROOND \lATER
..
65 fc SAMPLE 1
l}St t
CUHULA r I Vl
CONT.vII NATION
LEVelS C.C.L.
ACCEP r AUU;
U)f,I r AHI NA r 1011
lEvElS
CLEANUP?
YES IF E > F
NO I F E ~ r
SOIL SIJRFACE
SAMPLE '.ND. . .f-I.'"
:: C.C.l. 1 ·4,-76 " .lOOD_ ___y!?!. X..no
C.C.t. ,
+ SAMPLE 2-D.A.5.r.f-'1I
:: C.C.l. 2_5 .26 IQQ'p_ . __yes Lno
C.C,L. 2
.. S1J1PLE 3 0...-5 J,'II
:: C.C.l. 3-5-.·7-6· ___J.f>'Q.{L yo:-" Lno
C.C.l. 3
.. S.vIPlE 1,_0....2 ppOl
: C.C.t. 1,·-5-.·96 -. __ __10. 0..0_ __ye... x._no
C.C.t. I,
+ SAAPLE S -D--.~. ppa
:: C.C.t. 'j~3-é-- ._ J-Q_O.Q. YC1', Lnn
C.C.l, S
.. SAMPLE 6Jl~.ppll . __l.O_iLQ_.
: C.C.t. é-6-.-16 -. YC'i X-no
C.C,L. 6
... SAMPLE 7 _Q....2...PP"
: C.C.l. 1 ~-.-9-&-- 1000 _yes X-no
C.C.l. 7
,. S.vIPlE 8 ND _J'P'q 1000 L
: C.C.l. 8.~__ _yes no
C,C,l. 8 ....
... SAMPLE 9 ND r::pn
: C,C.l. 9 6.. 96 100-0 _yes ~no'
C,C,L, 9
..SAMPLE 100.0Cri)m
:C.C.l. 10 6 .. 965 1000 _yes Lr,o
C.C.t. to
+SAAPLE 11 ppn
:C.C.t. 11 yes _no
C,C,l. 11
+SAI4PLE 12 ppn ..
.. :C,C,l. 12 yes _no
. ,.".
- .
. -.
.. .........
. "... -..
'. ..:......: .:....: .... .-.... ............. :.".::"
. .. ":" :.'~ :~'."..:::':::::::':'. p' ......
42
It
01.. AHtE F'''' I
SURfACE TO
G~()J)d) \JA1ER
-
A
I~?·~ft
I
.'
..
C
DISTANCE FRQ4
SAMPLE TO
SURFACE
.'
A
L_ f t
L
5ft I
ylº-_ ft
.
5 (t I
.,15 _ ft
.
Sf t I
.,~- ft
..
SIt .
"li- ft
..
5ftl' .
...~ ft
"' - .
Sftl :::-.-<: ::
.,.35 Oft
. .....-::-....:.. ".
5i.tL-~:-<t
¡.
Sft I
. ~5.ft
A-
Sitl_..·· . ..
.,50 ft
e
EHVfRONMENTAl
fABLE Z·J
fATE \/CRKSHEET fat Toluene
I
Table 9 :
Pence Petroleum
. ...... .
Sft I' '::" .'.
.·..,~ft
D
E
=
DISTANCE fRai
SAJoIPlE TO
GROOND \JATER
CUHULA T I VI:.
CONTAMINATION
LEVElS C.C.L.
SOIL SIJRfACE
SAMPLE 1.'ND ~""
SAMPLE 1 1~. Sf t = C.C.L. 1....,...... .
C.C.L. 1
.19Qtt .. SNlPLE 2-º.~_.OJ:\·~n
SA.I4PlE 2 : C.C.l. 2-0.00.5
C.C.l, 2
18 Stt .. SAMPLE 3 Ó_~.(>.?r,."
SAMPLE 3 :: C.C.l. 3-0-..635
C.C.l. 3
180ft · SAMPLE ~_!.~_5 ppll
SA.I4PlE t. : C.C.L. 1,.2_.135
C.C,L. I,
1 7 SIt .. SAMPLE 5 _3~ J. I'P"
SA.I4PlE 5 :: C.C.l. 5~~~
.... C.C,L. 5
. 170ft. · SAMPLE 6_2 . 5.ppn
SAJoIPlE 6 = C.C.L. 6_7__9.35..
C.C,l. 6
16~~ + SA.l4PlE 7J:.~b
SAMPLE 7 :: C.C.l. 7 ..9~4..3.5_
C.C.L. 7
... i6Cft · SA.I4PLE 8 0 ,5 ppn
SAMPLE 8 = C.C.L. 8.9-...9..35_
C.C,l. 8 1
155tt .. SAMPLE 9 2 . ppm
SAMPLE 9 = C.C.t. 9 12 . 0.3..5
C.C,l. 9
15 Ûft "SAMPLE 10 2 ,9 ppm
SAMPLE 10 :C.C.t. 10 1 4 q36
C.C.L. 10
14~t ..SAMPLE ,,3,lppn
SAJoIPLE 11 =C.C.l. 1118.035
..;.':æ;;.5:;;I~~.;:i\~tE ", . 7: eft :~~~+ H ~ ; 8 R ~
,. ." . . .:::::.:....:...:.::.:.:....::..:: ..:. ':...::.;::::.:..:--.... '::::::. ..
".. :.:-0.:,. :...'.~_. :... .:: ..: :.:-: .':':.:.>:.:... :.:...:.:.:.:.:.:.::.:.:-:.:. .:.:.:.:.:.:.'.:':'..:'::': ~:...::.:.:..:.:.:.'.:.. :./. . .... . _ 4.... . .
::.::- .,. -::):.:'::-:::':::::-:':... :.:.:-.;:...:-:::-:.-:.::::::.:::--:....-:::-:::.:::......:':':':;:::"'::';::::;.:::::-:'::::::.::' .....:.::.,. _::::-..:.;'.::: :-:'--..'
..< fue.ONST I TlÆNT)
.1- A
r AVERAGE ANNUAL
I.J ~Rf;.IPU~~~~~~_S
/ / I I I I I I I I I I I I
; I / / I I I I I I I I I I
F G
E:CCEPfAUl~ CLEANUP?
~(~fAHI~ArIOu YES iF E ~ F
lEVELS NO IFf ~ f
.. -- -... - - -
.10.0.0.--
- La 0.0.-
-.l..O 011.-
--~O 0-0-
. _lO..O.Q._.
lonA'
1000
. .
1000-.
1000
1000'
1000
:
__.yc!> __.no
___yes x-no
_ye~ x-no
__yO!:. X-_no
__ ..yc!-' X-nn
_yes Lno
_yes X-no
_yes X-no
_yes X-I'IO
_yes X-r,o
_yes Lno
- -
... .. .'.
. ..
.. ....... .... -..... ...
.......... . ..............-.--.. ..... .
. . ... '.. ,'..........
..'..... . .. .....,....:.............
: ~yes _ !Lrio
.. . ... ... .... ..:.:........ ..:.. .-:..:.....:....................:.... .... ..... ........ ..." ........... . .... -.. ... .,. ...- ..... .... .
- ~ -'
_ . -; _. _ . ,- -_(", '0'_ - -....r-
~ -__;~ - -=~~ ~ ~" ~:. ;: - -; -~ ~ ~__~:~ .~~:~~~~E=~~;~ 5S~-~--_·~·--:",.æJ1'-_· ~.~~=: --~~--~~~::.;~:-.- "::..0. -~-~~:;;-~ - ~- ~- -
ft .. feet pp" .. paru per .i' l ion
. NOTE: CONCENTRATIONS FOR ANY SINGLE SOfL SAMPLE CANNOT EXCEED 100ppa FOR BENZENE, 80ppm FOR TOLUENE, 40pplt FOR XYlEME
AHa t.Oppm fOR ETHYlBENZENE IN ORDER TO BE USEe WITH THE GENERAL RISK APPRAISAL.
THE LAST SAMPLE TO BE INCLUDED IN THE CALCULATIONS FOR CUMULATIVE CONTAMINATION MUST BE AT OR ABOVE THE
DETECTION lIMIT; DO NOT INCLUDE BOTTOM SAMPLES WHICH HAVE CONCENTRATIONS lESS THAN THE DETECTION LIMIT.
42
Ii
OISTAHtE H!CIt
SURfACE TO
G~OOId) UA'JER
..
1~~2-1t
I
e
fABLE Z·J
ENVIRONMENTAL fATE ~ICSHEET fOR Toluene _pUEl CQHSflfUENT)
Con t,
e
C
DISTAHCE fRCIt
SAMPLE TO
SURFACE
6...5_ f t
..
5 f t I
"2~.f t
A-
5 r~ I
. "15-.'t
A-
. -
5ftl
,,8 L' t
A-
5 f t I .
"ª-2- f t
A-.
5ft I - .
~ft
.A- ..:,-.
Table 9 Coot.··
Pence Petroleum
D
DISTANCE FRCIt
SAMPLE TO
GROOND UATER
..
SAMPLE 1 135'[
SAMPLE 2 .1.3.0' [
SAMPLE 3 ..l.23 t
SAMPLE t, lW t
SAMPLE 5 ll.,;t t
....
SAMPLE 6 ~t
SAMPLE 7 10 !:it
S»IPlE 8 10CJt
SAMPLE 9 ~ft
SAMPLE 1D ..2JL f t
SAIoIPlE 11 - ft
E
CUMUlA T I VE.
CONTAMINATION
lEVelS C.C.L.
SOIL SIIRFACE
SAMPLE 1.~D ..PI."I
C.C.L. 1.l9.~835
C.C.L. 1
+ SAMPLE 2 1, 3 ''Ietll
= C.C.L. C2T:135
C.C.L. 2 .
+ SAMPLE 3 ~......? H cu
= C.C.l. 3_22.-..3.35
C.C.l. 3 5
+ SAMPLE l, 0 . ppa
= C.C.l. (.2.-2.835
C.C,L. l, 1 5
+ SA.'IPLE 5_~.. F-i.>:I
= C.C.L. ')_2A.~33_5
J- A
r AVERAGE ANNUAL
r PRECIPITATION
I" -::-::-_-==-_1 NCHES
J J I I I J I I , I I I I I
¡ I I I I I I I I I I I I I
f C
ACCEPIAUlt
WH lAMINA r ION
lEVel S
u ~O.Olt
10..0ll
_ __1.Qilil.
.. -~j) Q.Q
__.l!lO.o..
C.C.l. 5 1 3
+ SA.'IPLE 6_ . .PI~1t
= C.C.l. 6_2~6J.~ ._--LQ:O_Q.
C.C.l. 6 1 0
+ SAJ4PlE 7 . Wit
= C,C.l. 7-¿Q.~6 3_5
C.C.l. 7 ND
+ SAMPLE 8 -.P£'ß
= C.C.l. (20: º ¿..?
C,C.l. 8 0 0&
+ SAMPLE 9 ..
= C.C.l. 9 26, 4
C,C.l. 9 0 o~
+SAIoIPLE 10 .
=c.c.l.1026,6
C.C.l. 10
+SAHPlE 11
=C.C,L. 11
1090
1000
1000
1000
pp11.
pP1I
CLEANUP?
YES If E > F
NO Iff ~ f
._.yc~ X..no
.___yes x-no
_ye,. Lno
__yc... X_no
__ ._yc~ Lnn
_yes Lno
_yes X-no
_yes ~no
_yes ~no
_yes Lr,o
_yes _no
_ .. ~yes _ _no
. .
. -
....
... . ..
. ..." .. - .. .. .
. . ".. ..... .". . ............
.. -. ............. .... .... .
. . :......:.::.....:.:.:... ::.:..........
~
.5ft .·::.;:... _;::'
yllO ft
...:...
Sf1l '
"_ft
..,;;_:.A- ...,.. . ,
,::::::V~ ::.\i./:::: ; .{\ :-:..;_ .
':'<-:-::::::::--:-_:,:;;::~~ft ,..~LE 12 _ft.
. ....... ...... ... .,... ...
.. ..... .. ...,.' .....
. ..... ...... .... ...... .....
.. ... .. ...... .'. ....... ... ... ....... . .... ...
.. ............. ....... ... .. .... .. ........ ..
.. . ... ....... ......... .... ...... ..... ... ..... ... ..
.. . :.;.: :..::(:x::....:... ..:':':=:'.::::::::::=:'. ":::..:::.::.::::::.::::::::.:"':.:.~.::::::::::::.::::.::::::.:.;::.::::....::::.::...::;:: '.. .::9 .'.
;::::-:.,.. - ;;);.;:-; :./:;:';-:":-_. ;- ;-".::::;.;;;;:;:.-:' --:;:;.::;.';;.;.;':;;::;::.:.':...;;:;:;::::::'::.::::::::::..:.:;: ;.:;::::- :.::.' .;.:.:,.. .:;::..:.:..;:: .: ....-
_: .::_: 5f~1 .-
-; .~ft
..... .:.-."; ".-.
, .
5ftl>·; .
. ylOOft
..
C.C.L. 1~
. +SAIoIPlE 12
:=C.c,l. 12
..
.-
.. .... ... .... ............ ... ...... . ...................... '" '" .... . ...... ." ... .
I - - -- ,-. ~'~"'- . - - ~ c - . . ~
_:_~-:::-.. - -j ~ _ .:~: ~-__- . _ - _- ~ -~ ~-~__;_-:~--~~~~~;:~~~_~_ 0: ,,-~~-dl__- =~~~;__~~.. ~~- --~~~~;-;;.-:;--:~~~~~~ ~- ..'- -_
'"
5ftl
,,10 5 ft
'.6, ':":.'
...... .
..
. ..
ft . feet ppa ~ perts per IIi II ion
. NOTE: CCNŒNtRATtONS FOR AMY SINGLE SOIL S»IPLE CANNOT EXCEED 100ppa FOR BENZENE, 80ppu FOR TOLUENE, 40ppll FOR )('flUE
AND 40ppa fOR ETHYL BENZENE IN ORDER TO BE USED WITH THE GENERAL RISK APPRAISAL.
THE lAST SAMPLE TO BE INCLlI)ED IN THE CALCULATIONS FOR CtMJlATlVE CONTAMINATION MUST BE AT OR AsaVE THE
DETECTION LIMIT; DO NOT INCLlI)E BOTTOM SAMPLES WHICH HAVE CONCENTRATIONS LESS THAN THE DETECTION LIMIT,
42
Ii
D I ~T AH(;E fRat
SURfACE TO
G~CXJÞd) IJAiER
.
1-1_ 9--º. f t
I
. .
...
...
-.
e TABLE l'} e
ENVIRONI4ENTAL fATE ~KSHEET ,Oft Ethy1Ben_~fuEL COfjSTITUENT)
C
DISTANCE FRat
SAMPLE TO
SURFACE
..5__ft
Áo
5 f t I
".liLft
A
5 (c I
. "li_ft
A
5ftl
"2.D...ft
A
Sftl
.. .2..5... ft
A.
Sftl
..~ft
,. . .
sftl:>_-: .:
.....lLft
...... .:-....:.
Sit I.... '. .
·..~ft
,.
5ftl
...!â.-ft
. ... ........ -
5ftl p- ..:.,
.. 2.Q.... ft
..... ......
sft¡'::
_ ,,2...2-.ft
" ,.
<Sf t I· .:::':.
. . . - ..' ..
. ...... ....... ".
P,' ..,...
.. :_..6Òn
Ethy1benzene
Table 10
Pence Petroleum
o
DISTANCE fRat
SAMPLE TO
GRa.JND IJATER
A
SM4PLE 1 1cI-Slt
SAMPLE 2 ~-2..Qf t
SAMPLE 3 185ft
SAI4PLE '+ 180ft
SAMPLE 5 175ft
SAJoIPLE 6 170ft
SAMPLE 7 165ft
SAMPLE 8 160ft
SAJoIPLE 9 155ft
SAMPLE 10 150ft
SAMPLE 11 145ft
.. -.<. - .
,- '" ......
... ...... ..' ..... -.....
._..0 . P·-. ....
0.. .... _. ..' '" ..... . .
.- ........... .
. ...".... . .... .. .'-
«dd,,' .. . ......--... ..-
. p' ........ . ............ ...
. .......... ..... "- .....- -..... .' ....... ..
. '............. .............. . ........ .".
........... -.' .......... ...... ............. .,...
.....'....'... ....... ............. ... ..... - ....
:.:--.;-;...:.:.:..-:..:.;.;.:.:..-::;.;.:-:........ ....:-:.;-;.;.:;._;.;-;.;.;..-_....:._...;_::..:....y
"5mLE 12 140f{
E
CUHUlA TI VI:.
CONT AI4/ HA TlON
LEVELS C.!:.L.
SOIL SIIRfACE
SAMPLE 1_~D .H·f11
= C.C.L. 1--
C.C.L. ,
+ SAI1PLE 2!iº_. _.I~-'''
= C.C.L. 2-=-
C.C.L. 2
+ SAJoIPl E 3 0.. 6 Sr, .n
= c.c.l.3.Q~~·6·8.
C.C.l. 3
· SAMPLE "_~n~ -º ppn
= C. C .l. i, _1 Þ .6 8 ..
C.C,L. 4 _
+ SAMPLE 5 3~? ~>f.\:I
= C.C.L. sA....JJL,_
C.C.L. 51 7
· SAMPLE 6__~.Pf~n
:: C.C.l. t..5 .~t8._.
C.C.L. 6
+ SAJoIPLE 7ND F'P"
= C.C.L. 7:>:~___
C.C.l. 7 D
· SAJoIPLE SN ppn
:: C.C.l. 8.S , 8 ~__
C.C.l. 81 2
+ SAMPLE 9· ppm
:: C.C.l. 97, 08
C,C.l, 92 6
+SAMPLE 10· ppm
=C.C.L. 109.68
C.C.l. 102
+SAMPLE 11 . 9 epn
=C.C,l. 1112. 58-
C.C,l. 1'2 4
. +SAJoIPlE 12' rn
::C,C,L,1214.9
r-f~~ERAG~ ANNUAL
r p~ecrPITATION
.. INCHES
----
.. --.-..----
I I / I / I / I , I I / I I
i / I I I / / I I I I I I I
f C
Aceep r AUtl.
UIH rAMINA r IOU
levEL S
-- - .- .- -
... . ------
_1.0.0.0.._
..100_ Q_.._
.lOQQ_
. _l.OJl Q_ _.
100q'
1000
lOOL
1000
1000'
1000
CLEAlIUP?
yes IF E )0 F
NO I F e ~ F
yc~ no
..._ye... _no
_ye,. X-no
__yc... X-_no
_. ..yc!. X-nn
_yes X-no
_yes X-no
yes ~no
_yes Lno
_yes Lr,o
_yes Lno
'. _yes. Lno
- .-
...
~
.--
. .-........... '" ...... . ................... .' :... - . '.. ...... '.
j - . .... _. .. --
~.._~~~~~..~~~~-~: ~~=~~~o:-, -- .e~~... .-...-.~.~.~.-.._~.'~.~.::::~;-~~~~~~.~ -'~
ft =0 feet ppm :: parts per mi II ion
+ NOTE: CONCENTRATIONS FOR ANY SINGLE SOIL SAMPLE CANNOT EXCEED 100ppm FOR BENZENE, 80ppm FOR TOLUENE, 40ppm FOR X~lENE
AND '+Oppm FOR ETHYlBEHZEHE IN ORDER TO BE USED WITK TME CENERAL RISK APPRAISAL.
THE LAST SAMPLE TO BE INCLUOED IN THE CALCULATIONS fOR CUMULATIVE CONTAMINATION MUST BE AT OR ABOVE THE
DETECTION LIMIT; DO NOT INCLUOE BOTTOM SAMPLES WHICH HAVE CONCENTRATIONS LESS THAN fHE DETECTION LIMIT.
42
a
DISTANtE FR~
WRfACE TO
G~OOId) 'oIAJER
---.
-2:G-G- f t
,
, .
"
."
..
"
e
e
TASlE 2,'
ENVIRONHENTAl FATE UORKSHEET 'OR
_.CfUEl CONSTlTlJfHT)
Ethylbenzene Cont.
Table 10 Cont.
Pence Petroleum
~- A
AVERAce ANNUAL
r· . Pl/fCIPI TATlCH
I '" ~:-.=-_INCHES
I 1// I / / I / / I / I I
i / I I I / / / I / I I I /
f C
C
D
E
DISTANCE FRCf4
SAMPLE TO
SURFACE
DISTANCE FRat
SAMPLE TO
GRooND UATER
CUMULATIVE
CO+ITAMINAT ION
lEVelS c.C.L.
ACCEP r AUl f:
to.u AM I NA rr 011
LEVELS
CLEANUP?
YES If E > F
NO IF E $. F
=
Q.?_fr
.. SOIL SIIRFACE
SAMPLE 1..~P ..f-1,"1
SAMPLE 1 1_3 :1 t = C.C.l. '.14.98 .lODO. . .__yc'!' X..no
C.C.L. 1
+ SAMPLE 2_o..~. ª.I-i-'II
SAMPLE 2 . 13Jh = C.C.L. 2_15.78 .lO.QO._ yes .x....no
C,C,l, 2 º_<? J,f"
+ SAliPlE 3
SAMPLE 3 125t = C.C.l. 3_.16-,..48 _ ~ O..Q.Q...::.. _ ye~. X-no
C.C.L. 3
120t · SAMPLE ,,_.Q_~ 2 ppn
SAHPlE 4 = C.C. L. "._16 M 6,8 " .J..O.O 0.._ --y~... ]Lno
C,C,L. l, 4
11!it + SAMPLE 5_1. .,.H->:.
SAMPLE 5 = C.C.L. 5 -1.8 ~8 ._l.OJlO_ _. .:rc." ..x..no
. . C.C.l. 5
· SAMPLE 6 O. 8 PI)" :
SAMPLE 6 . - 11 (h = C.C.L. é~1.a..:aß. . _JJ1.QJL. _YC$ Ã..no
.:-
C.C.l. 6
10 !it .. SAl4PlE 7_Q~pprr 1000 JLno
SAMPLE 7 = C.C,L. 7 -.l9.--...4Jt _yes
C.C.L. 7 ND
- , lOth · SAl4PlE 8 ppm
SAMPLE 8 = C.C.l. 8~_~ 1000 _yes 1l.no
C.C,l. 8 ND ;....
~ft + SAMPLE 9 ppm 1DOL
SAMPLE 9 = C.C.t. 9 19,'18 _yes lLno
C.C.L. 9 O.Ob
+SAMPlE 10
SAMPLE 10 .....2.-º-ft =C.C.L. 10 19,49 1000 yes 1l.r,o
..
5ftl70
· _._.it
·
5 f ,t I
.~ft
..
5ftl
"~ft
'"
Sf t I
"~ft
"'-
SHI - .
.~ft
· .",
5_ft 1':.:'_- .:
"~ft
". .:-.:.': '--
Sft I":. ,',
. ,.10 Oft
·
Sftl
,.105ft
· -
5ftl :.....' -.-
. ,.110ft
".: ~ ;..
Sft I
,.
pPI!I
.:'. '_ _yes ,"_r'tO
C.C.L. 10 '
+S.o!PlE 11
=C.C.l. 11
pçm
SAMPLE 11 _____ft
_yes _no
.--:'",
.... . ........./.... .·....¡¡¡.¡¡·,:~;,t¡±i.;.~\~~~"¡':;;:.,.. :' ...... ..'
C.C,L, 11
+SAMPlE 12
:'=C,C,L, 12
~
.. . ..' ,...... .... ... ..... ... ...... . ................... ... .... -" .... . . .... .
- j --
~~;-¿~~F ~::_-=-~~:_:~:~ -::--:-~~~:~;~~=~;~.~~~~~~~SE:~~~~:~~~~ - - :._:-~,,~-~~ _: - -. -
.. .. .
ft . feet pptI . parts per lDi II ion
· NOTE: CCNŒIITItAT IONS FOR AHY SINGLE 501 L ~PLE CAIINOT EXCEED 100ppn fOR BENZENE, 80ppn fOR TOLUENE. 40~ FOR XnEME
AMe 40pptl FOR ETHYLBEHZEIIE IN ORDER TO BE USED WITH THE CENERAl RIS( APPRAISAL,
THE lAST SAMPLE TO BE INCL\J)ED IN THE CALOJLATlONS fOIl ClKJLATlVE CONTAMINATION MUST BE AT OR ABOVE THE
DETECTION LIMIT; DO NOT INCL\J)E BOTTOM SAMPLES WHICH NAVE CONCENTRATIONS LESS THAN THE DETECTION LIMIT.
. -
. ...
.... ... ".
....... .... ..... .. ... . ....
.'. . ......:............-.. ............. .....
.. '.. ............. ....
....:.:...:.::.:.:...:.:.:.:.:.....:.:...:. .
. ... ,..
. ...
42
ij
DIS.TAJlC;E FI~Q4
SURfACE TO
G~OOId) UA1IER
--
Î _~.9Jlft
¡
...
..
-.-
..
e
fABLE 2'1
ENVIRONMEHrAL fArE \ØICSHEET 'OR Xy ene
C
DISTAHCE FRQ4
SAMPLE TO
SURFACE
5.._ f t
..
5ftl
..~.ft
..
5 r ~ I
.. ..l.5.._ f t
..
'Htl
.. .2.fL.f t
..
.'
5ft I
".2..5- f t
"-
5ft ' -
.. .3..íL. f t
.. ..
. Sftl_·:-;:··-:·
. "-3...5-.fi:
.... '::'. ..
SIt -·..:
-"~ft
...
Sft I
" J..Ltt
.... ........ .'
Sft I'.:
.. 5JLh
..... ..'
Sfll'::' .
"22-ft
.. ..
Table 11
Pence Petroleum
D
DISTAHCE FR()4
SAI4PLE TO
GRCUND UATER
..
SAMPLE 1 195ft
SAI4PLE 2 l..9...O. f t
SAMPLE 3 l.ß.S..t t
SAMPLE 4 l.8Jl f t
SAMPLE S l..2.5- f t
. -
SAMPLE 6 . 1.1..0... f t
SAMPLE 7 l...6..5.. f t
...
SAMPLE 8 160 It
SAMPLE 9 155 ft
.. S~PLE 10 150ft
SAMPLE 11 145ft
.::-Sftl:i .....
......... ..' .........:..
_. _.::::::~ ~..?.._:f~..:.· ..~:~E_._1_~.: __ _ '. _..'
.. - ... .. .. ... . . .. .
.. .....~... . ,. ... .... -. .... ..... ... .
.. -.. .-..... .............. .. ... ....
.". :: ::.. ".:.. :::.::.:.:..-:",:. :?::"::::::'::-::::::::::, ;:.::::::::::":::::.::::':::.:::::.<:::::":'::'::'::".::~:: ..... .:.
. . .,. ":':-:-'.::':'::'.:::'-' :.:-".:-.:.:.....: '.':-:-:':"'::':"':':'''-' .....:.:...:-:.::..:,.:.:.:..._.:-.:.:-:.: -::....-.-.y ....:..:.:.:::
E
CUHUlATIVl
COtH AMI NA T ION
LEVELS C.C.L.
SOIL StJRFACE
SAMPLE '~P.. Jim
= C.C.L. 1~:-_
C.C.L. 1
.. SMlPLE 20. 0 3 À.UI
= c. c. L. 2õ~'~-ö33
C.C.t. 2 - 4
.. SAMPLE 32 _~... _. J, ell
= C.C.L. 32..4.33
C.C.L. 3
.. SMlPlE l,?~_~ PI'li
= C.C.l. l,B ..333..
C.C.L. l, .
.. SAMPLE 5!~.. J,,~:a
= C, C . L. ~ 2..2..... 3_:L
C.C.l. S
.. SAMPLE ~~l_Pl~1I
= C.C.L. 631..63_.
C.C,L 6
.. SAMPLE 7!0 _PS"II
= C.C.t. 7U....6.ll
C.C.l. 77 8
.. SAMPLE 8' ¡Jpn
= C.C.l. ~9 .-.{)_:i
C.C.L, ~
.. SAMPLE 9~
= C,C.l. 95b:433
C,C.t. 9ól2
"SAMPLE 1 ppm
=C.C,L. 11:6 8,433
C.C.L. '~l .
"SAMPLE 11 ~
=C. C. L. 11/9, 4.5 3
C.C,L, ~~. 1
4 0 -f~:~~~~: 12Ö ¿ . ::> 33
..-
.....
e
..<FUEL CONST I TUEHT)
r-I~~ERAG~ ANNUAL
PRECIPI TAT lOtI
I ... r -::-::-.-===.1 NCHES
/ / / / I I / I / I / I I I
¡ / I / I / / / I I I I I /
f G
ACCEP I AUl f.
WNIAHINArION
lEvelS
.. ~O 0 Q .
_ .1íl!HL
_~.O_O!L
.. ~QOiL
._ HlD!L
. _lO..O..D_._
1 (lO-n
1000
. .,..
10.0JL
1000
1000
1000
CLEANUP?
YES IF E .. f
NO IF E ~ f
___ye~ -X.no
o _yes ..x,..no
_ye,- ...x...no
__yc:. ...x...no
_. __yc~ Lno
_yef> ...x...no
_yes Lno
_yes lLno
_yes Lno
_yes .x..r,o
yes lLnÖ
- _yes .-lLnO
-_.
.. -
. -.. .. .
... 0..". -0. .
. ....: 0":':. ..:.~..". 0..::: ::::.::..) .: .:. .0,. ".:.,.::.-:.. OF ":. ". '."
',"". .... .... .................... ....0', .
....:..... .....;.:...::.::..:...:.:........;.:... "."".
~
o. ... ....._. .... '0...·. ... .... . ................... ,.. ... .. .... . . - . .. .
- L - 0 -
~~;~~~~~-r<~~-~o;~~~ :70~~~;~~-::~ ~~~~~~~~~1-~~:~~=-----c~_oo-~~--_~:- - :_ "0"
.. ...
ft :0 feet ppm :0 pa,.ts pe,. ..i II ion
. NOTE: CONCEMTRATIONS FOR ANY SIHGLE SOIL SAMPLE CAHNOT EXCeED 100ppm FOR BENZENE, 80ppm FOR TOLUENE, 40ppa FOR X1LEME
AND 40ppm fOR ETHYLBEHZEHE IN ORDER TO BE USED WITH TKe CENERAL RIS( APPRATSAL,
THE LAST SAMPLE TO BE INCLUDED IN THE CALCULATIONS FOR ClMJLATIVE CONTAMINATION MUST BE AT OR ASOvt: THE
DETECTION LIMIT; 00 NOT INCLUDE SOT TOM SAMPLES WHICH HAVE CONCENTRATIONS LESS THAN THE DETECTION liMIT,
42
It
OI:¡T AIIe;E fltC»4
$URfACE TO
GI!OOIiD UAJER
..
1..2.0..0.f t
,
.'
- .
.. .
..
..
..
..
e
TABl.E Z'3
ENVIRONMENTAL FATE \ØICSHfET ,~ xylene
e
..( fUEl. CONST !TUE""
t
DISTANCE FRC»4
SAAPlE TO
SURFACE
-6-5- f t
..
5ftl
.. :J.D.-.ft
...
5ft
....25.._ f t
...
Table 11 Cont. ;
Pence Petroleum
D
OISTANCE fRC»4
:; SAAPlE TO
GRCJJNO UATER
..
SAMPLE 1 13-5 tt
S.v1PLE 2 1-3-0.£ t
SAMPLE 3 ft
5ft
YllOL_ft SAMPLE 4
...
5ft I
Y.ß...5- f t
....
5tt I
".9..0- f t
.... .':. .
5f~ I ..- -. .
.. .::.:q\: ft
5ft ,. .
.. .l..O..O. it
.
5ttl
"ll..5. f t
'. .
Sft I·. .
"ll..O. it
,.:", .......
Sft¡'
.._ft
..
SAMPLE 5
. .
SAMPLE 6
SAMPLE 7 ft
-..
SAHPlE 8 ft
SAMPLE 9 ft
SAHPLE 10 - ft
5.v!PLE 11 - ft
-Sft I:
..... . ..... .......... . ."d¥TA;;¡ì;;.{.,'i",i,:;:,:,:: ~ft
::.::/ y -.::-::::::·::-X:::·:-;'·.· .: ..,.:---:.::.--: ':':-:.:.::':::':'.':':':.:. .-.':-:':-;'.::' -:.:.;-".,,_.:. .:.;.:.: '.:.:.: :-_-y ....; .':':_: ::. .
SOl L SIJRfACE
Ft
ft
ft
E
J- A
f AVERAGE ANNUAL
PRECIPITATION
,. J -::.-:-_:=:.I_~CHES
I I / / I / / I / I I I I I
i I I I I I I , I I I I I I
f G
s
.. ... ......... ..... ....... ".. ...... . ................. 0.. .,. .. .... . ...".
- I - ' .
. - - . - . -. ":I';,",=~- =. ~ --- -,,..~ _ - _ -:,.':""
:=:<~ ~J~~:~;.-~;;~;~~._~;:~~~~=~~;:~~-=~~~~;;~~- -: ~~.-~~7~--_~_:'·_-r=!ii!I.::-~~-:~~~~-_.-_:~~~~;~~.~_·__ '-. --.
CUHULA TI Vl
COHTAAIHA flON
LEVELS C.C.L.
ACCEPTAUlf.
WHrAAINArlON
L E YEL S
CLEANUP?
YES r Fe> F
NO IF E ~ F
ft a feet ppa :r parts per e¡ t t ion
· NOTE: CONœ»TRATlONS FOR A) Y SINGLE SOIL S»4PLE CANNOT EXCEED 100ppll FOR BENZENE, 80pprn FOR TOLUENE, r.Oppll Far X'ft,ENE
"NO 40ppm F~ ETHYlBEN2EIIE III ORDER TO BE USEO WITH THf GENERAL RISK APPRAISAL.
THE LAST SAMPLE TO BE IIIClLIIED IN THE CALCULATIONS F~ Cl.HJlATtVE CONTAMINATION MUST BE AT OR ABOVE THE
DETECTION liMIT; DO NOT INClLIIE BOTTOM SAMPLES WHICH HAVE CONCENTRATIONS LESS THAN THE DETECTION LIMIT,
SAMPLE 1:1,., 0 _~'"
::: c.e.L. 183 . 533 --l-DO 0- - .__yc~ X.no
C.C.L. 1
+ SAMPLE 2l.~.ª_. ¡-i.1II
::: C.C.L. 28_7.333 ...lO.QQ_ . __yes Lno
C.C,L. Z
+ SAMPLE J2 ~J _. .n "'
= C.C.L. 38-9.·-633 _~.QQ.O_ _ye,. Loa
C.C,L. 3
+ SAJlPLE 41. 5 ppn
= C.C.L. "91'.:-133 _. ~O_O Q_ __yc... .lLno
C.C.L. r.
+ S.v1PLE ~J__ pp:a
:; c.e,L. '59.9..- 3- 3..3 ._l.O..QCL _. ...'fc:e. Lno
C.C.L. 5
+ S.v1PLE 6?~_PI) '
:; C.C.L. tl 0.4- . .933 . _lO...O.Q_. ye.. Loa
C.e.l. 6
+ SAMPLE ì'!~Lpµ J
::: c.e,L. 7J.Jl9_033 1000 yes ]Loa
C.C.L. 7
+ SAMPLE ¡J) . 5 _ypn 1000 1L
:; C.C.l. BJJl9.....5A..3 yes oa
C.C.L. ~ 01 ' ..
+ SAMPLE . PP" 1000 ]Loa.
= C.C.L. q¡OQ.543 _yes
C.C.l. 9 .
+ SAMPLE 1d) . 08 ppn
:::e.e.1.. 1<JI 0 q Fi23 1000 _yes 1L no
e.c.1.. 10
+SAMPlE 11
=e.c.L. 11
ppn
_yes _no
C.C,L. 11
. . +SAMPlE 12
..=C,C.L. 12
pPII
_ _.. _yes.- _no
-. .
.. .
..-
..
. .....
-- -
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. . .... "':<"::'::'.-".:.:-.; :::::;";:.":":: - ...... . ..
...0 .....:.;.....:.::......:.:.;.....:.:..........
42
e
EXHIBITS
e
J
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. o<II,IOY..
.
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....~~At
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i t:: ~- 2 OIQI.S ~ "VI J~
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~ _ ~ _ .. Jl/lCHFW cr
c...:',LS -~ j -.~:"<-"~~"VI I
ðCC - - - . =----- ~ s..w.rrH Sf
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a.&ÞO ",..,.
IT :1 ,~
.,. ., ¡.
~ I' -.-J c.r.TfWAY 011: :
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f
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i
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i
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E;~ hi bit
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J 1 '!r' ~s~"'o('nd Cr;v!' Suit~ 1 03
·zTÏi'1d. ~.};jf(¡rn;a -?33C:
rO:....¡Jl'loo@. (ZO:;) .~Z3-Q'76:
; ~;.; 328-1 I 29
I
I
I
I
I ¡
I I
I ¡
,
i I
~er:ce ?eU-:))8Urn
:'~)(~ nfi~1 d ::;.j 1 j ¡'or ni:)
I
I I
..... :CINIT'..' ~AF
1
I
I
\
i
'.
-
----- --
Ibdtl '1U:II. ...-- -
East Truxtun Avenue
o Streetlight SlgHost
\ Sidewalk
X Fence Line
N. VI-1
% Vapor 0 VI-6
Extraction .
VE-2 Unit
0 B- A
/ VE-3
Dirt Lot 0
Confirmation Boring
Q.
Approximate location of VE-1 Approximate location of dispenser island
former underground tanks 0
B-2
.
B-4
.
Scale 1":::; 10'
o
5 10
--.J
20
Sidewalk
15
o
Pole Anchor
AquaGeosciences, Inc,
1701 Westwind Drive, Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax: (805) 32801129
Title
~
901 E. Truxtun
Bakersfield, California
SITE MAP
VI-5
.
\
Approximate .limit of
petroleum hydrocarbon
impacted soil
Key
ø Testhole Borings
o Vapor ExtractIon Wells
. Vapor Inlet Wells
ø Confirmation boring
.:9
~
~
æ
Exhibit
2
\
N
Estimated Portion of Plume
Requiring Remediation
Former Gasoline
Tanks and
Dispenser Island
manhole
o
Q)
-¡;
Q)
"D
East Truxtun
- --
.
streetlight
parking lot
- --
East 18th
SCALE 1 " = 20'
. Prior Boring Location
o Vapor Extraction/Inlet well
Title
Pence Petroleum
901 E, Truxtun
Bakersfield, California
AERIAL VIEW OF PLUME
Exhibit
, AQuaGeosciences, Inc,
1701 Westwind Drive Suite 103
- 'kersfieJd, California 93301
I elephone: (805) 328-0962
I Fax 328-1129
3
~
Surface
V!-4
B-2 VE-' VE-3
VI-'
VI-6
20'
. ~·..O¡:8 "-
NO h:t: :0..:.:..·:.·.11\
L¡{;;{, .::::
H':::D~ aza ;.. i'=.. ..
. . . .;~ ..j:~~():.::..:: .. . ...:.. :: .. .+:?::: . ··..:::·X.:·...
...:::::,::. ~::. ... . .??? .......
NO ,ì~~:;;~f,:r~:;j!~ .\ NO
~ N:: .: .. ... :;::~:r'::::::;·.:.!!:.m!m:!:!!!!:!!m::::i¡:¡:! ~ :.:¡::¡Ii¡!!¡!:¡!¡!;:~::::::.:!·~·¡::!!:)::¡!:::t -
31 .. ... .......):):)):;::,):::::::):I:::::. .... . ... . r:f:···· .... NO
40'
Screened Interval
60'
, "', ",,··I.)&%R-'· '" "'" ".'
No(~?;~.,Jj:'IJ ,~~." _ ::
k::::. . .::::::::::... . ...(::::(::::::.... .:::::.:....:..::::.:::... ,... ... ::}}} .:i!:::::!:·:=::::::=:::::.. .::::::::::::,7
ill~lr;' NO'! , II-'W'
... ·2·······························..·· ···-::::::::::···V NO ·....·\f:{··::::::::::::: ,::::::./
:::: .>::::.:::;)!.:::::~:!).:;!::¡;:::=::!~:!.:j.:::::.:::: ... .i: ::.\...:: ... .. .:. . ¡:~:li¡!¡!li!¡!r
. .. .
NO
80'
'00'
NO
NO
NO
TPHg Plume
Scale 1 " = 1 5'
o
20'
I
40'
Title
Pence Petroleum
90' E. Truxtun
Bakersfield, California
Cross Section A-A'
Exhibit
AquaGeosciences, Inc.
1701 WestwInd Drive, Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax: (805) 328-1129
4
o
-Surface
B-3
VE-3
VI-S
20'
eened Interval
40'
60'
80'
100'
TPHg Plume
120'
o
20'
I
40'
Scale 1 " = , 5'
Exhibit
Telephone: (805) 328-0962
Fax: (805) 328-1129
Ti1le
Pence Petroleum
901 E. Truxtun
Bakersfield, California
Cross Section B-B'
5
AquaGeosciences, Inc.
1701 Westwlnd Drive, Suite 103
Bakersfield, California 93301
Total depth of borIng: 110' DIameter of borIng: 6- Date 5/16/94
Casl ng¡ dl ameter: Length: Slot sl ze:
Screen dIameter: Length: MaterIal type:
Drl111ng company: Sol1s Englneer1ng. InproJect.Geologls~Patr1clc McCu110ugh
Method used: Hollow Stem Auaer
DEPT
SAMPLE
NO.
-0-
-2-
-4-
-6-
-6-
-10-
-12-
-14
-16
-16
-20
-22
SIgnature of RegIstered ProfessIonal:
Registration No.: 4779
P. Goa1w1n
State: CA
LOWS F.I.D. U.S.C.S
CODE
DESCR I PTI ON
Su rface
4
4
4
SP
SAND - sorne gravel, gravel to sand grade,
red/org., darnp, no odor, no stain
o
22 SAND - sorne gravel, gravel to sand grade,
1 1 950 SP red/org., dry, moderate odor, slight stain
3
15
57 575 SM SAND - some silt, sand to silt grade,
gray, damp, mod. to strong odor, no
stain
1 1 SAND - some silt, sand to silt grade,
25 1000 SM gray, damp, strong odor, no stain
+
26
Key ~ UIIll ~ Q II EZl [g
SW ML CL SP SM SC GP
LI TH WELL
TYPE CONS
· . . .
· . . .
· . . .
· . . .
· . . .
· . . .
· + + .
· . . .
· . . .
· . . .
· . . .
· . . .
· . . .
· . . .
· . . .
· . . .
· . . .
· . . .
Exh1b1t
1701 Westwfnd Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
T1t1e
PENCE PETROLEUM
901 E. TRUXTUN AVENUE
BAKERSF I ELD. CALI FORN I A
CONFI RMATI ON BORI NG C-'
6
DEPT SAMPLE BLOW F.I. USCS DESCRIPTION LI THO WELL
.
NO. CODE TYPE CONST.
-24 5 SAND - some silt, sand to silt grade,
10 850 SM red/org., damp, strong odor, no stain
-26 13
· . . . .
-26 · . . . .
23 SAND - some gravel, gravel to sand · . . . .
1000 · . . + +
-30 36 SP grade, redlorg., damp, strong · . . . .
+ petroleum odor, no stain + + . . .
24 · . . . .
-32 · . . . .
· . . . .
-34- 12 SAND - some silt, mad. sand to silt
23 000 SM grade, redlorg., damp, strong odor, no
-36- + stain
27
-38 · . . . .
12 SAND - coarse sand to mad. grade, · . . . .
000 SP · . . . .
-40 26 red/org., dry, strong odor, no stain · . . . .
+ · . . . .
34 · . . . .
-42 · . . . .
-44 15 SAND - some silt, med. sand to silt
28 000 SM grade, brown, damp, strong odor, no
-46- + stain
31
-48-
8 SILT - some sand, trace clay, fine to
-50- 16 000 ML clay grade, brown, sltly. damp, strong
24 + odor, no stain
-52-
-54- 7 SILT - some sand, trace clay, fine to
18 1000 ML clay, reddislbm., dry, strong odor, no
-56- 42 + stain
Exh1b1t
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (80S) 328-0962
Fax 328-1129
Title
PENCE PETROLEUM
901 E. TRUXTUN AVENUE
BAKERSF I ELD. CALI FORN I A
CONF IRMA T ION BOR I NG C- 1
6
Page 2
DEPT SAMPLE BLOW .I.D USCS LI THO WELL
NO. CODE DESCR I PTI ON TYPE CONST
-58-
15 SILT - some sand, trace clay, fine to clay
-60- 42 1000 ML grade, brown, sltly. damp, strong odor,
43 + no stain
-62-
-64- 18 SAND/SILT - mad. to silt grade,
57 000 MlIS
-66 + bmJorg., dry, strong odor, no stain
-68- 16
29 000 SM SAND - some silt, mad. to silt, brn./org.,
-70- + dry, strong odor, no stain
40
-72-
-74- 9 SAND - some silt, trace clay/gravel,
22 000 SM gravel to clay grade, reddish bm., damp,
-76- 25 + strong odor, no stain
-78- 12 · . . . .
SAND - mad. to fine grade, raddishlorg., · . . . .
-80- 24 000 SP dry, strong odor, no stain · . . . .
· . . . .
+ · . . . .
43 · . . . .
-82- · . . . .
· . . . .
21 SILT - some sand, trace clay, fine to
-84- 32 000 ML
clay grade, bm., damp, moderate
34 + odor, no stain
-86-
-88- SILT - some sand, some clay, very
13 000 ML
-90- 30 + fine to silt grade, brown, damp, strong
34 odor, no stain
Title
PENCE PETROLEUM
901 E. TRUXTUN A VENUE
BAKERSF I ELD. CAL I FORN I A
1701 Westwind Drive Suite 103
':\akersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
CONFIRMATION BORING C-1
Exhtb1t
6
Page 3
SAMPLE BLOW F.I. USCS WELL
DEPT NO. CODE DESCR I PTI ON CONST.
-92
-94 9 SAND - some silt, trace gravel, gravel t
30 000 SM silt grade, org./bm., damp, strong odor,
-96 + no stain
37
-98
15 SAND - some silt, very coarse to silt
100- 26 000 SM grade, org./bm., dry, strong odor, no
23 + stain
-102-
-104- 18 SAND - some silt, coarse to silt grade,
41 000 SM orgJbm., damp, strong odor, no stain
-106 45 +
-108
31 000 SM/M SAND - some silt, mad. to silt grade,
- 110 51 orgJbm., damp, strong odor, no stain
+
- 112
114- END OF BORING @ 110'
116-
118-
120-
122-
124-
I I
1701 Westwind Drive Suite 103
~akersfleld, California 93301
"elephone: (805) 328-0962
Fax 328-1129
T1t1e
PENCE PETROLEUM
901 E. TRUXTUN AVENUE
BAKERSF I ELD. CAL I FORN I A
CONFIRMATION BORING C-1
Exh1b1t
6
Page 4
e
e
APPENDIX A
Site Assessment Lab Reports
and
Chain-oj-Custody
e/1 ¡'lL!~_jAl
SAMPU: I ()
C:~N' s~~~. ~¡f J¡ ~ ¡
JAIN- W",", ~.;;'. i'
EllS IWI 'r ~ J:.
S:~~' /~~
J 5 V V
I .s vv
I 5 V V
J .5 ../ I
lP. NO.
¡PO NO)
=Nce - 9ò/ E. "fft/'Jtn¡J
SAMPL E RS CS'IJ""tul"/Nurn",,o¡
81' J.
/- h, I, n
SAMPLE 10 /
TIME
HDD/YY tHi MM SS
DATE
11 I", q 'tj"~ JUi VT: - 1 r;;) :i,A)
/..',"1' JI1')'l/J1vI \/'1:-1 Iff) 40'
~.... ,
2.' rt\1 If) ',tlf AM VI- ,1\) .~-S-
,,'r,)1 1/ "'AM IIr-1 ¡;i) ']()J
I ....-
'J..'JIPJI IIJ: SeJ nt1
. ,
n./' J J', oç J'\ m
. I . ,
,."1.1(,)/ !J' ,,^ "'''"''
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I I
-
^
~':~( hld~y~~:D
.,.
linqullh' by: (SlgnllulI,
linqullh.d by: (SlgnllulI'
~~c:¡J/ltbOr'IOrY ~,~ J ./
JIj., /I" Fa;'" ¿.J/.C; I / Jt~
"(J"'Y (/ 'Canary' Relu,n Copy To Shipper
(;H 1\ TN OF CT TRTOOV
t/E - J (i) 1.,6-'
V £ - J M'J ~ç; J
'--'
\/ £- -I t'lñ Il'ft> '
-....
V E. - I (ó) 111<: )
v' V
vii
1 5 l/ II
I S v' V
J 5
J '5
D.le/Time Re~eived by: (Signaturl)
1~11-~ltt,1 'r~a ~
I doT'" 0".1", by' ""',,.,,
Remarks
D.lerme
White 5arnoltl
''V
/1 ab, /e LIit
.:/ß c. ;
AEMAR~;S
Send Results To Eh' /' Î IV tÙ ¡.J
Allentlon 01 I I 0 (;t{)~
AQUAGEOSCIENCES I
1701 Weslw,nd Dr.. Suire 101
Bake,sheld, CalifornIa 93301
P"'h ldtl CNlt
::::> ? -e.\.x-ùJ tv ~ /
\~Si \ . eV\u-· NO. S.mpl. ~
l.P. NO. SAMPLERS ISlyndlure/Nllrnt>etl OF Typo ~ <ß~
(PO NO I 'Ph', \~ ~ hoA-L~ ~ Soli ~
CON· IS) .>..'"
....,
TAIN· WI'" ~"f'
DATE SAMPLE 10 1 SAMPLE ID ERS (W) "f' ~~
TIME Sludgo / At(
MIOO/YV Hit MM S5 ISiI)
~ r t1hl 'I '. ;J(J AM VE.-z, @ .'- .-' ~ ;/ V
.:;>'>
1111/ 10.' O~·- At1 vJ3,-1-e J vlV
~-ò , 5
'VI 1J II>: JAAr-1 \/6-).. @ (,.ð I J S / tI .
f) -"';/'1 J ,,: 1.tJ AM \I ,¿ ..."). (ét), );0' I .s /£1
I
. ~t/'1J <6'.33 Å'~ \/fi,- ~ @. I I 5 vV'
/6
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~,~ 3' ... '-4 s- N^f ve..- oz., (iJ I I C) t/y
c,]ð ,
rI,' " ". i~"AM v1§..-3 (&> ~Di , 5 vlv
,
r\Ob' \L, Lr
-
¡-LNG
REMARKS
-
r..
~Krn~Q "/' W;;r;:: ,,; ";¿:...;~
Rema,ks
SendResullsTo~ . \ í~ .,.,.J
Attention of . y\" \ \ ( "1 ('\ A-\ .Lò I
le,T'nqullned \y:I(SignllulI'
Da:T'me
Da:i,me
~)CÍ¡Al:wp
Recalved by: (SIo"llu'll
AQUAGEOSCIENCES
1101 Weslwrnd 0,.. SUIte 101
Bakersfield. Calolornla 93301
Wt1llt 5d Hpl~f
~~w~'li~
tJ'L
Canary. Relurn Copy To Shlppe'
Pm" LaD .Coo.
lellnqullhed by; (SignllulIl
~ -/.~
rH ^ TN OF CTTSTOnV
e
e
~~ JIfO.
ArIzona
Nðvada
5327 Wfngfoot DrIve
Bakersfield, CA 93306
(80s) 872-4750
Laboratory Res.uIts Par
Pence Petroleum
901 East Truxtun Ave
Bakersfield, CA
Date Received : 8/23/91
Date Analrzed : 8/30/91
Analyst : J.S. Johnson
Lab NO. 910122
Sample Matrix ¡soils
Benzene
. mg/Jcg
Toluene
mg/kg
Ethylbenzene
mg/kg
Xylenes
mg/kg
Tot Pet Hyds
mg/kg
v r - 1 @ 2 5 I, 183.750 421.220 82.105 984.220 15,000
VI-1940' 73.505 168.210 31.215 492.015 6,625
VI-1@55' 91.875 210.000 42.310 615.010 7,420
VI-l@70' 61.250 1.40.000 27.010 322.975 5,105
YE-19ôS' 200.335 505..075 92.015 1105.125 17,220
VE-1@851 147.310 323.015 52.710 779.875 12,910
VE-l~100' .995 1.210 .275 4.225 125
VE-1@10S' ND ND ND ND 30
All Results Reported in xilligrams per Kilogram
ND = Non Detectable: EPA 802å (.OOS mq/kg)
EPA 8015 Modified for Gasoline (5 mg/kg)
Analysis of VOlatile Aromatics ; EPA 6020 ,
-Analysis of Total Petroleum Hrdrocarbons ; BPA S015 Modified for Gasoline
*The TPH Method for Gasoline is' the Calif DOHS Recommended Procedure
Certificate Number
E739
-------
Certified Full Service On Sitc Analytical Laboratorie~
. ..,..,.., ecn.¡ï :n T an.1 I.Jn~-J QCI! t t t~.:. T.-~t-~
e
e
Nevada
~ .inJM, JICe.
Arizona
5327 Wlngfoot Drive
BakersfIeld, CA 93306
(805) 872-4750
Laboratory Results For
Pence Petroleum
901 East Traxtun Ave
Bakersfield, CA
Date Received : 9/1/91
Date Analyzed : 9/9/91
Analyst : J.S. Johnson
Lab No. 910130
Sample Matrix; Soils
Ben~ene
. mg /kg
Toluene
mg/kg
Ethylbenzene
mg/kg
Xylenes
mg/kg
Tot Pet Hyde
mg/kg
VE-2@35' .335 1.010 .105 2.220 120
VE-2@50' 12.220 28.885 5.5ÒO 103.775 1SS0
VE-2~60' 2.210 9.055 .S75 12.150 375
VE-2Q1S0' ND Nt> ND ND 30
VE-39l0' ND ~_D Nt> .105 80
VE-3@lS' 1.115 20.210 .725 9.990 320
VE-3@20t 11.775 26.210 3.330 88.r45 1250
VE-3630' 17.200 50.270 7.710 161.075 1825
All Results Reported in Milligrams per Kilogram
ND = Non Detectable; EPA 8020 (.005 mq/kg)
EPA 8015 Modified for Gasoline (5 mg/kg)
Analysis of Volatile Aromatics ; EFA 8020 . .
*Åna~yeis ot Total Petroleum Hydrocarbons; BFA 8015 Modified for Gasoline
.The TPH Method tor GasQline is the Calif DOHS Recommended Procedure
Certificate Number
E739
~.
Cattified Full Service On·Site Analytical Laboratories
-,-"",.-. ,-.~..., ~'P""t""'tll I~"'U-.J t:O:.TT T'::~T_CT_~
e
APPENDIX B
Additional Inlet Wells
Lab Reports
.. and
Chain-oJ-Custody
e
'W
. . -.J
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. _. II." KK0550. IIUIlIcr'S "oilll Shipyard IIldg. 114 · San francisco. California 94188 · (, 30-3000 · Fax: (415) 822-5864
5417 l'a,1 La Palma Avellue · Anaheim. California 92807 · (71'1) 693·1026 · Fax: (714) 693-1034 FILE NO. LAB NO.
.lENT NAME: Rvi Pc::...... Cc:: ANALYSES REQUESTED: . REMARKS:
¡OJECT NAME: ¡PC'.., C e ?c. 7;. Ie: to -., PROJECT NO. P.O.NO.
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NO. SAMPLED SAMPLED SAMPLE DESCRIPTION WATER BOIL SLUDGE OTII~R TAT . TYPE COMMENTS:
I_;_JO /o/Ij/n /r)o 7.JA- 2. ~ Ý ./' / !] /' /'
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~~- ' .,/a-. r .Pc ¡-;. ¡' (... Æ- /1~G. ~..~ /'Yf{ F/' I~ IIII'M 1. Samples returned 10 client? YES
øllllQulshed By: Sl niSluru and P""led .N:frí¡e) Received !:Iy: (SlgnelUle end Printed Name)¡;j' , Dale: Time:
2. Samples will not be stored over 30 days. unless
allllQuished By: (S'gnature and Printed Name) Received By: (Signature and Printed Name) Date: Time: additional storage time is requested.
3. Storage time requested: _____ days
¡PECIAL INSTRUCTIONS: By
Dale.. . ..:.-.-
......
1,',,/1 .\'('1\'1&"1.' JIICJt'/Jt:"J~,,' 'f(')';'II: l.ilb.II a¡ \' J- \f J,/HhüJ I t)O.J
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DISTRIBUTION: WHITE, YELLOW. PINK TO SECD - GOLD TO CLIENT
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l'a,1 Wa,hinglUn BoukvanJ · Los Angeles. California 'J0021 · ( '49-3411 · Fax: (213) 745-6372 DATE: PAGE _ OF
. .1, Bu. KK0550,IIunler's Poinl Shipyald Bldg 11·1 · San Francisco, California 94188 · (. J30·3000 · I'a.: (415) 822-5864
5427 !'asl La Palma Avenue · Anaheim, California 92807 · (714) 693-1026 · Fax: (714) 693-1034 FILE NO. LAB NO.
lENT NAME: /(0 6~/' -;- .P~ "7 c. f? ANALYSES REQUESTED: REMARKS:
:OJECT NAME: ~... 0( <- ~T,.." /CÚ~ PROJECT NO. P.O.NO.
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0 ~ SAMPLE CONDmONl
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NO. SAMPLED SAMPLED SAMPLE DESCRIPTION SLuooe TAT COMMENTS:
WAT£II SOIL 0'01,£11 . TYPE
~ '-.li /oj;)/¡ J o 7$tù 7.JA ¡ 7 y- / / fJ ./ /
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~:;- ~ ~/, /. j¡r, . , . , "FI HClt.¡P'T1hft?tJyPn II JiM 1. Samples returned to client? ® NO
.hnquiahed By: (Signalure anlll"~lI Name) Received By: (519£:9 and Printed Name) Dale: Time:
2. Samples will not be stored over 30 days, unless
alinquished By: (Signalu/u allll P,inlull Nemal Rucuived By: (Slgnalure and Prlnled Nemel Dale: Time: additional storage time is requested.
"
, ;!~. 3. Storage time requested: days
iPECIALINSTRUCTIONS:
By Dale
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. . . .. - ~ .. . . ... .
f' 1/ \' \' J d J I r I I I I II 1/ I JlI)(J.I
DISTRIBUTION: WHITE. YELLOW, PINK TO SECD - GOLD TO CLIENT
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HALCYON
IJLaboratoríes.
Certified by the State of California Department of Health SeMceS
Loba'OOOO- # IÇ)2C)
1701 Westwhld Dr. Suite 103
ßnke."sileld, C,-\. 93301
Phone: 805-328-0962, Fax: 805-328-1129
II I
Illh
Report of Analysis
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-4-35
Matrix: Soil
Analyst: MCM
Lab #: 93A286
Date of sampling: Oct 14, 1993
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units L*
Benzene ND mgIKg (ppm) 0.05
Toluene ND mg/Kg (ppm) 0.05
Ethylbenzene ND mgIKg (ppm) 0.05
X lenes ND m 0.05
TPH gasoline 31. mg/Kg (ppm) 1.
TPH diesel ND m m l.
*PQL = Practical Quantitation Limit
~ )
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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HALCYON
hJla bù r ato rít£í.
Certined by the State of (a Mfornia De~rtment of Health Services
Lðba'ðt"A::rY # 1<J2()
1701 1f...·stwhld I)... Suite 103
Bnkel~Ueld. (\-\. 93301
PhOr1ê: .'305-3~.8·00f32. Fa'-: 805·328·1129
. ¡fIll I 1111111.
Test: 80 15mJ8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company; Aquageosciences
1701 Westwind Dr. Suite 101
BakersfielcL CA 93301
Contact person: Patrick MCCullough
Sample: V -4-45
Matrix: Soil
Analyst: MCM
Lab #: 93A287
Date of sampling: Oct 14, 1993
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units L·
Benzene 0.12 mg/Kg (ppm) 0.02
Toluene 0.53 mgIKg (ppm) 0.02
Ethylbenzene 0.32 mgIKg (ppm) 0.02
X lenes 1.0 m 0.02
TPH gasoline 200. mg/Kg (ppm) .5
TPH diesel ND m m .5
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa LeniŽ, Ph.D.
Laboratory Director.
e
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1111'ffiucYON'111
I,Jlaboratúríes.
Certified by the Store of Colifornia Department of Health Services
LðlM:nJko' # '~2()
1101 Wl-sh"'hul Dr. Suite 103
Uakel'Siield. (',", 93301
F't~O )ç: 805-3~:'3·0gf3:.:?, Fax: 1305·328-1129
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111h.
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
COIltact person: Patrick MCCullough
Sample: V -4-50
Matrix: Soil
Analyst: MCM
Lab #: 93A288
Date of sampling: Oct 14~ 1993
Date of analysis: Oct 19~ 1993
Date of Report: Oct 19, 1993
Com und Concentration Units L*
Benzene ND mgIKg (ppm) 0.005
Toluene ND mgIKg (ppm) 0.005
Ethylbenzene ND mgIKg (ppm) 0.005 ..
X lenes ND m m 0.005
TPH gasoline ND mgIKg (ppm) .1
TPH diesel ND m m .1 .
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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IJLaboratorÍc£i,
CertJfied by the State of California Department of Health Sel"vices
Lðb«ðk:f'Y # .~~
1701 Westwlnd Dr. Suite 103
Bakersfield, C,-\. 93301
phone: 805-328-9962, Fax: 805-328-1129
I 111
Report 0' Analysis
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -4-60
Matrix: Soil
Analyst: MCM
Lab #: 93A289
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report: Oct 28, 1993
Com und Concentration Units L*
Benzene .78 mgIKg (ppm) 0.05
Toluene 2.0 mg/Kg (ppm) 0.05
Ethylbenzene ND mgIKg (ppm) 0.05
X lenes 4.3 m m 0.05
TPH gasoline 1000. m~g (ppm) 1.
TPH diesel ND m m l.
*PQL = Practical Quantitation Limit
~Æ~
Rafael Espinosa LeíÍiz, Ph.D.
Laboratory Director.
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)J[aboratorí£s.1
Certifì0d by the St.aœ of California Deportment of Health Sel'o.1ces
LðÞc:;nt ta'Y # 1<)'2()
1701 Westwhld Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-328-0002, Fax: 805-328-1129
1111
Illh.
Report o' Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BJEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -4-65
Matrix: Soil
Analyst: MCM
Lab #: 93A290
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report: Oct 28,1993
Com ound Concentration Units L*
Benzene ND mgIKg (ppm) 0.005
Toluene ND mglKg (ppm) 0.005
Ethylbenzene ND mglKg (ppm) 0.005 .
X lenes ND m 0.005
TPH gasoline ND mglKg (ppm) .1
TPH diesel ND m .1
*PQL = Practical Quantitation Limit
?/~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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aLaborntoríe£).
Certified bV the StDte of California Deportment of Health SeNices
Lðb«'ðUt'..,.. # 1c,)'2()
1701 Westwlnd Dr. Suite 103
Bakersfield, CA 93301
phone: 805-328-0062, Fa.x: 805-328-1129
.¡III 1111h,
Report 0' Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-4-70
Matrix: Soil
Analyst:MCM
Lab #: 93A291
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report: Oct 28, 1993
Com und Concentration Units L*
Benzene .023 mgIKg (ppm) 0.005
Toluene .022 mg/Kg (ppm) 0.005
Ethylbenzene ND mgIKg (ppm) 0.005
X lenes .021 m 0.005
TPH gasoline .7 mglKg (ppm) .1
TPH diesel ND m .1
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa LetÍiz, Ph.D.
Laboratory Director.
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)~ILaboratoríes.f
Certified bV the State of California Department of Health Sel'.lÌces
Lðba"ðta""Y # 'Çþ~
1701 Westwind Dr. Suite 103
Bnkersiield, C.-\. 93301
Phone: 805-328-0962, Fax: 805-328-1129·
Report o' AnalysIs
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-4-85
Matrix: Soil
Analyst: MCM
Lab #: 93A292
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report: Oct 28, 1993
Com und Concentration Units L*
Benzene ND mgIKg (ppm) 0.005
Toluene ND mgIKg (ppm) 0.005
Ethylbenzene ND mgIKg (ppm) 0.005 .
X Ienes ND m 0.005
TPH gasoline ND mg/Kg (ppm) .1
TPH diesel ND m m .1
*PQL = Practical Quantitation Limit
~~,
Rafael Espinosa LenÎz, Ph.D.
Laboratory Director.
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)JLaboratoríes.(
Certifiød by the State of California Deoortment of Health Services
Labu-üt«y # .<)'2()
1701 Westwhld Dr. Suite 103
Bnkersfield~ CA 93301
Phone: 805·32.~-0962, Fax: 805·328·1129
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Ilh\
Report 0' Analysis
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
BakersfielcL CA 93301
Contact person: Patrick MCCullough
Sample: V -4-95
Matrix: Soil
Analyst: MCM
Lab #: 93A293
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report Oct 28, 1993
Com und Concentration Units L*
Benzene ND mg/Kg (ppm) 0.005
Toluene ND mg/Kg (ppm) 0.005
Ethylbenzene ND mWKg (ppm) 0.005
Xlenes ND m 0.005
TPH gasoline ND mgIKg (ppm) .1
TPH diesel ND m m .1
*PQL = Practical Quantitation Limit
/~::.-/~- .
Rafael Espinosa ~, Ph.D.
Laboratory Director.
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IJLaboratoríes.
CerbAed by the State of California Deportment of Health SeNiC0S
LalKfilkrY # .~2()
1701 Westwlnd Dr. Suite 103
Bake-rsfield, CA 93301
Phone: 805-328-0962, Fax: 805-328-1129
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Report 01 Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-5-15
Matrix: Soil
Analyst: MCM
Lab #: 93A282
Date of sampling: Oct 13, 1993 @ 15:00 pm.
Date of analysis: Oct 18, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units L*
Benzene ND m!ifKg (ppm) 0.05
Toluene 0.33 m!ifKg (ppm) 0.05
Ethylbenzene 0.74 m!ifKg (ppm) 0.05
X lenes 3.9 m m 0.05
TPH. gasoline 810. mg/Kg (ppm) 1.
TPH diesel ND m m 1.
*PQL = Practical Quantitation Limit
.~~
Rafael Espinosa Leniz, Ph.D,
Laboratory Director.
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IJLaboratoríe%.,
Certjfìød by the State of California DecxHtment of Health Services
Lðbu"ðtc:o-' #I .~~
1701 Westwlnd Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-32ß-0962, Fax: 805-328·1129
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Report o' AnGlysls
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -5-20
Matrix: Soil
Analyst: MCM
Lab #: 93A283
Date of sampling: Oct 13, 1993 @ 15:09 pm.
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mglKg (ppm) 0.2
Toluene 2.3 mgIKg (ppm) 0.2
Ethylbenzene 3.2 mg/Kg (ppm) 0.2
X lenes 9.5 m m 0.2
TPH gasoline 910. mgIKg (ppm) 1.
TPH diesel ND m m 1.
*PQL = Practical Quantitation Limit
~G
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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)JLaboratoríes.,
Certified by the State of (ahfomia Department of Health SeMces
Lðba"ðtu"Y # .~~
1701 Westwlnd Dr. Suite 103
Bakersfield, tjA 93301
Phone: 805-32ß-0962, Fax: 805-328·1129
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Report o' AnalysIs
Test: 80 1 5mJ8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -5-30
Matrix: Soil
Analyst: MCM
Lab #: 93A284
Date of sampling: Oct 13, 1993
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units L*
Benzene 0.2 mg/Kg (ppm) 0.2
Toluene 3.7 mg/Kg (ppm) 0.2
Ethylbenzene 2.5 mg/Kg (ppm) 0.2
X lenes 11. m 0.2
TPH gasoline 1200. mg/Kg (ppm) 1.
TPH diesel ND m m 1.
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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)JLabo rat 0 ríe$'1
Certifìød by the State of California ()eportment of Health Services
Lðbu"aW"Y It .~~
1701 Westwlnd Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-328-0002, Fax: 805-328-1129
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Report o' Analysis
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -5-40
Matrix: Soil
Analyst: MCM
Lab #: 93A285
Date of sampling: Oct 13, 1993
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units L*
Benzene ND mg/Kg (ppm) 0.2
Toluene 10. mg/Kg (ppm) 0.2
Ethylbenzene ND mg/Kg (ppm) 0.2
X lenes 22. m 0.2
TPH gasoline 5200. mg/Kg (ppm) l.
TPH diesèl ND m m l.
*PQL = Practical Quantitation Limit
,~G
Rafael Espinosa Len~ Ph.D.
Laboratory Director.
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IJLaboratorírS'.f
CertJlied bV the Stote of CalifomÎa Department of Health Services
Lab«'atuy #I .()~
1701 Westwind Dr. Suite 103
Bakersfield, CA 93301
Phone: 80S-32'8·0962, Fax: 80S-328-1l29
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Report o' Analysis
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -6-35
Matrix: Soil
Analyst MCM
Lab #: 93A275
Date of sampling: Oct 13, 1993 @ 10:03 am.
Date of analysis: Oct 15, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mgIKg (ppm) 0.005
Toluene ND mgIKg (ppm) 0.005
Ethylbenzene ND mg/Kg (ppm) 0.005
X lenes ND m 0.005
TPH gasoline ND mgIKg (ppm) 0.1
TPH diesel ND m m 0.1
*PQL = Practical Quantitation Limit
~-~
Rafael Espinosa Le~ Ph.D.
Laboratory Director.
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,JLaboratorítS ·f
Certified by the State of California De~rtment of Health Services
Lab«"at«y # .~'2()
1701 Westwind Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-328-0962, Fax: 805-328-) 129
, ¡III
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Report o' Analysis
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfiel~ CA 93301
Contact person: Patrick MCCullough
Sample: V -6-40
Matrix: Soil
Analyst: MCM
Lab #: 93A276
Date of sampling: Oct 13, 1993 @ 10:21 am.
Date of analysis: Oct 15, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mWKg (ppm) 0.005
Toluene ND mg/Kg (ppm) 0.005
Ethylbenzene ND mg/Kg (ppm) 0.005
X lenes ND m 0.005
TPH gasoline 1.8 mg/Kg (ppm) 0.1
TPH diesel ND m m 0.1
*PQL = Practical Quantitation Limit
~0
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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IJLaboratoríeS'.,
Certified bV the State of California Department of Heolth Services
Lðb«ðt«y 1# .~'2()
1701 Westwind Dr. Suite 103
Bakersfield, CA 93301
..
Phone: 805-328-0962, Fax: 805·328·1129
, IIII
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Report of Analysis
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -6-45
Matrix: Soil
Analyst: MCM
Lab #: 93A277
Date of sampling: Oct 13, 1993 @ 10:37 am.
Date of analysis: Oct 15, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units P L*
Benzene ND mg/Kg (ppm) 0.005
Toluene ND mg/Kg (ppm) 0.005
Ethylbenzene ND mg/Kg (ppm) 0.005
X lenes 0.010 m m 0.005
TPH gasoline 0.5 mg/Kg (ppm) 0.1
TPH diesel ND m m 0.1
*PQL = Practical Quantitation Limit
~0
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
e
11111111111
JIIIP'.· ''111111111
HALCYON
IJLaboratoríe~.1
Certified by the Stote of California Deportment of Health Services
LalKrata-v # .~~
1701 Westwind Dr. Suite 103
Bakersfield, <;A 93301
Phone: 805-32'8-09132, Fax: 805-328-1129
AI
Illh
Report o' Analysis
Test: 80 15m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -6-50
Matrix: Soil
Analyst: MCM
Lab #: 93A278
Date of sampling: Oct 13, 1993 @ 10:54 am.
Date of analysis: Oct 15, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mgIKg (ppm) 0.03
Toluene ND mg/Kg (ppm) 0.03
Ethylbenzene ND mg/Kg (ppm) 0.03
X lenes ND m m 0.03
TPH gasoline ND mgIKg (ppm) 0.5
TPH diesel ND m m 0.5
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
e
11111111111
11111111'" '.,11111111
HALCYON
)',JLaboratoríes ·1
Certiñed bv the StrIte of Colifcmio DeCX)rtment of Heolth Ser'oJices
Lðb«ðt«Y # .~24)
1701 Westwind Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-328'()962, Fax: 805'328-1129
,till
1111t
Report of Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-6-55
Matrix: Soil
Analyst MCM
Lab #: 93A279
Date of sampling: Oct 13, 1993 @ 11:10 am.
Date of analysis: Oct 18, 1993
Date of Report: Oct 19, 1993
Com und
Concentration
Units
L*
Benzene
Toluene
Ethylbenzene
X lenes
ND
0.009
ND
0.015
mg/Kg (ppm)
mg/Kg (ppm)
mg/Kg (ppm)
m
0.005
0.005
0.005 '
0.005
TPH gasoline 3.9
TPH diesel ND
*PQL = Practical Quantitation Limit
0.1
0.1
~~
Rafael Espinosa eniz, Ph.D.
Laboratory Director.
e
e
11111111111
11111111'" ."11111111
HALCYON
IJLaboratorítS'.f
CerMed by the 5tDte of Canf'ornia Deportment of Health Services
Lðba'ðtuy 1# .~~
1701 Westwtnd Dr. Suite 103
Bakersfield, CA 93301
phone: 805·328-0962, Fax: 805-328-1129
, illl
Ilh.
Report o' Analysis
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-6-70
Matrix: Soil
Analyst: MCM
Lab #: 93A280
Date of sampling: Oct 13, 1993 @ 12:16 pm.
Date of analysis: Oct 18, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mgIKg (ppm) 0.005
Toluene ND mgIKg (ppm) 0.005
Ethylbenzene ND mgIKg (ppm) 0.005
X lenes ND m m 0.005
TPH gasoline ND mg/Kg (ppm) 0.1
TPH diesel ND m m 0.1
*PQL = Practical Quantitation Limit
~0
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
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11111111111
1111111"" ."11111111
HALCYON
IJLabnratorít~.1
Certified by the Stele of Ca&fornia Department of Health Ser\lices
Lab«ata-y #I . .~~
1701 WestwAnd Dr. Suite 103
Bakersfield, (;A 93301
phone: 805-328-0962, Fax: 805·328·1129
I¡IIII Ilh.
Report 01 AnalysIs
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -6-80
Matrix: Soil
Analyst: MCM
Lab #: 93A281
Date of sampling: Oct 13, 1993 @ 13:00 pm.
Date of analysis: Oct 18, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units L*
Benzene ND mglKg (ppm) 0.005
Toluene ND mgIKg (ppm) 0.005
Ethylbenzene ND mg/Kg (ppm) 0.005 .
X lenes ND m m 0.005
TPH gasoline ND mglKg (ppm) 0.1
TPH diesel ND m m 0.1
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
e
APPENDIX C
CONFIRMATION BORING
LAB REPORTS
AND
CHAIN OF CUSTODY
il;IJI'·IIAI.<:YONII¡~1111
1~.'Ð.IILJorl\l orirs I:I!
CHAIN OF CUST"DY AND ANALYSIS REQUI:..., r
1701 Westwind Dr., Suite 103., Bakersfield, CA 93301 805-328-0962
.It
CLIENT NAME A<L.<:. &~of( ,~,.,c~j .:Inc. ANALYSES REQUESTED REMARKS
PROJECT NAME I ~ ,
~c:. /',-0 If '-'-, ~
""Cc::: S q 0
ADDRESS ~. ~ ~
,,~
PHONE .l~)}- 0 J~ ¿ ~
PROJECT MANAOER)J. .rt r(.. /~q.,,¿ FAX g ~
,/ \\~
SAMPLER NAME A /-,..., 'c Æ- /'/ ( ('... /~ 4c ,( ~
I "'-
SAMPLE DA TE/TIME SAMPLE DESCRIPTI"'ON, IDENTIFICATION
. SAMPLED 1.111 I r I x, oontalner, elo... \" ~
1111'17'1 o3ýr So.'! C1-..s- / / /
r ftp /~Y
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REUNQUISHED aÝ ~~ /-~. Date . time RELINQUISHED BY De Ie , lime
SIGNA TURE AtÐ PRINTED NAME .,p If ~ ,. c.. A- /"1 e .. .. c.,. ( SIGNA TURE AND PRINTED NAME
rECEIVED BY, /].?A ~~A Y' RECEIVED BY,
~I~_~~_TURE ANO PRIN;~ N;t.4E Æ-9h;ÍH/ C. /JI/~vo-n SIGNA TURE AND PRINTED NAME
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I:I"'IIAIJ:\'ON" ~II!I
1~:Ð.¡\llOrt\1 orirs ,: :
CHAIN OF CUS1~DY AND ANALYSIS REQUE...., r
1701 Westwind Dr., Suite 103., Bakersfield, CA 93301 805-328-0962
,iI!
CLIENT NAME d4.l.,r &coJc,'r... c.. r 1,..,(, ANALYSES REOUESTED REMARKS
! "
PROJECT NAME ~ Pc 1 ''0 ;~ ~ ,..,
~nc<=- £
ADDRESS 7o / E. /.....'<y/G.h ~
,
~. 0
PHONEJ 21'- o,ç ~ ~
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PROJECT MANAGER FAX ~
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SAMPLER NAME p~,;:::: , . c k /'1 C(.. //v~~< ~ "-1
SAMPLE DA TE/TI ME SAMPLE DESCRIP"tION, IDENTIFICATION ~
. SAMPLED Milt r I x, container, etc... "
///9 ,
QL¡IILfØ'5 .rh"i/1S1' JO:/ C-1- ~O ~ i/ v
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'1///. II(/'/ So: I c.. 2 - (é;..s- ./
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7rr
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. ?%
SIGNA TURE AtÐ PRINTED NAME ,P<;-....,'c. k /1 C'C... /t U<4t( SIGNA TURE AND PRINTED NAME
Æ.CEIVED BY~~ -/£~ . v RECEIVED BY.
~~~~~!URE AND PRINT!:I NAME ;Wc. '/'..h,~ AVn? SIGNA TURE AND PRINTED NAME
¿.-/ /
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1IIIIIIIlII
IPIIIP" "/ ."II~IIII
lL\LCY O.~
1·\,J.Lrrbüt'iltorics'lll
Certified bV the State of Cahfornia Deportment of Health Service3
Lab«at«y #I N'2{)
1701 Westwind 0.·. Suite 103
Bake.·síield, C."- 93301
Phone: 805-328-o962, Fa:\: 805-328-\129
I I t I
I'lL
Report 0' Analysis
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: Cl-5'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A474
Date of sampling: May 18, 1994
Date of analysis: May 26, 1994
Date of Report: June 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethylbenzene
X lenes
ND
ND
ND
ND
mglKg (ppm)
mglKg (ppm)
mglKg (ppm)
m IK m)
0.005
0.005
0.005
0.005
TPH gasoline ND
TPH diesel N A
*PQL = Practical Quantitation Limit
. ND = No detected at given PQL.
N A = Not Analyzed
0.5
0.5
~ß:?
Rafael Espinosa Leniz, Ph. D.
Laboratory Director.
e
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11111111111
!!II I',P·L. . "'11111111 I
FI-L \J-J CYO 0T
!,.1Ln bl.J rat {) r i cs' ,I
CertJAed bV the State of Colifornia Deportment of Health Sel\lices
Labaat4)ry» '.;):2()
1101 Westwhul Dr. Suite 103
Bakersfield, C.-\. 93301
Phone: 805-328-0962, Fax: 805-328-1129
1111
IIIL
Report 0' Analysis
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: C1-10'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A475
Date of sampling: May 18, 1994
Date of analysis: May 26, 1994
Date of Report: June 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethylbenzene
X lenes
ND
0.005
ND
0.033
mgfKg (ppm)
mgfKg (ppm)
mgfKg (ppm)
m fK ( m)
0.005
0.005
0.005
0.005
TPH gasoline 1.2
TPH diesel N A
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
0.5
0.5
~¿-;
Rafuel spinosa Leniz, Ph. D.
Laboratory Director.
·
e
11111111111
11 l1!!"',' ''111111111 I
, IlfliC:{O='T '
I~fiborator its',j
CertJfied by the State of Cahfornia Deoortment of Health SeMces
iLab«at«y # N~
1701 Westwind Dr. Suite 103
Bakersfield, C,-\. 93301
Phone: 805-328·0962, Fax: 805·328·1129
¡ II
tilL
Report o' Analysis
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: Cl-15'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A476
Date of sampling: May 18, 1994
Date of analysis: May 26, 1994
Date of Report: June 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethy lbenzene
X lenes
0.06
0.63
0.68
2.4
mg/Kg (ppm)
mg/Kg (ppm)
mg/Kg (ppm)
m /K ( m)
0.05
0.05
0.05
0.05
TPH gasoline 1800.
TPH diesel N A
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
0.5
0.5
~?7
Rafael Espinosa Leniz, Ph. D.
Laboratory Director.
e
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11111111111
IllfJIII='" ',11111111 I
I·' IL.\l'C-l{O?\T
1 ¡ "-' I ¡
¡ ¡ .iL a b Dr at 0 r 1 e 13' . I, ¡
Certified by the State of California Deoortment of Health Services
La boca tUY # ~ ')'2'()
1701 \Vestwlnd Dr. Suite 103
nalu~rsneld!l C,-\. 93301
Phone: 80S-32ß-0962, Fa.x: 80S-328'1129
¡ I
II Ii,
Report of Analysis
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: Cl-20'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A477
Date of sampling: May 18, 1994
Date of analysis: May 27, 1994
Date of Report: June 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethylbenzene
X lenes
ND
1.5
1.0
5.9
mg/Kg (ppm)
mg/Kg (ppm)
mg/Kg (ppm)
m /K m)
0.2
0.2
0.2
0.2
TPH gasoline 520.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
N A = Not Analyzed
20.
20.
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
-
11111111I1t
1111111'1" .. "'1111\1111
·r-~r). -rC·-\70 -'\.T
_ . _~:LL .' .1..._ '1
1!.\) lLabû r d t 1) ri es' '11,
Certified by the State of California Deportment of Health Services
iLab«at«y # i<)'2()
1701 Westwilld Dr. Suite 103
Bakersfield, C,",- 93301
Pho ne: 805.3~:---0962, Fa .x; 805·328·\\?9
,1111
¡IlL
Report 0' Analysis
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: Cl-25'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A478
Date of sampling: May 18, 1994
Date of analysis: May 27, 1994
Date of Report: June 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethy lbenzene
X lenes
0.4
3.3
2.5
14.
mg/Kg (ppm)
mg/Kg (ppm)
mg/Kg (ppm)
m /K m)
0.2
0.2
0.2
0.2
TPH gasoline 3000.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
20.
20.
~.
Rafael ES~Leniz, Ph.D.
Laboratory Director.
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11111111111
II 1II I l';I'_ .~ 7 "'¡""llll
" }ILliC.:( CYN
.1 j I]L n b 0 rat 0 r it S' .11
CertJAed by the State of Cahfornia (:;oePortment of Health Services
Lab«at<O' # .Ç)~Ð
1701 Westwhl(l Dr. Suite 103
Bnkersfiehl, CA 93301
Phone: 805-328-0962, Fa:-<: 805-328-1129
I III
Ilh,
Report of Analysis.
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: Cl-30'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A479
Date of sampling: May 18, 1994
Date of analysis: May 27, 1994
Date of Report: June 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethylbenzene
X lenes
ND
2.5
1.7
9.3
mg/Kg (ppm)
mg/Kg (ppm)
mg/Kg (ppm)
m /K m)
0.5
0.5
0.5
0.5
TPH gasoline 1200.
TPH diesel N A
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
50.
50.
~~
Rafael Espinosa niz, Ph.D.
Laboratory Director.
e
-
Certified by the State of California Deportment of Health Services
Lah4()l"a~ # I()~()
111111111\\
111 lI I~ I·.: '."1111111
I ~ HALCYO,N
11.iLaboratûrl£S ·1
1701 \'" est",,"bld Dr. Suite 103
Bakelesneld!, Cf\. 93301
Phone: 805-328-0962, Fax: 805·328-ll29
¡III
Ilh.
Report of Analysis
Project Pence Petroleum
Test: 80 15m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: CI-35'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCul10ugh Lab #: 94A480
Date of sampling: May 18, 1994
Date of analysis: May 27, 1994
Date of Report: JW1e 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethylbenzene
Xylenes
ND
1.5
ND
10.
mgIKg (ppm)
mglKg (ppm)
mg/Kg (ppm)
m
0.5
0.5
0.5
0.5
TPH gasoline 690.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL"
NA = Not Analyzed
50.
50.
~?-7
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
·
e
IIIIII ¡II!
1' JIII I I'~"I I IlIII
I-IAI~CY() ='I
I ¡]Labùrntorieß'"
1
Certlfied 01) the State of CalifornIa De(JOrtment of Health SeMceS
l.anu-at«y # 'r,)~()
1701 U'est,,"ind Dr. Suite 103
Bakersfield, C.-\. 93301
Phone: 805-328-0962, Fax: 805·328·1129
,ill I Ilk
Report of Analysis
Project Pence Petroleum
Test: 80 15mJ8020/5030 Total Petrolemll Hydrocarbons &
BTEX's by Purge and Trap Sample: C 1-40'
Company: Aquageosciences Matrix: Soil
170 I Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A481
Date of sampling: May 18, 1994
Date of analysis: May 27, 1994
Date of Report: June 1, 1994
Benzene
Toluene
Ethylbenzene
Xylenes
ND
0.5
ND
7.8
Units P L*
mglKg (ppm) 0.5
mglKg (ppm) 0.5
mgIKg (ppm) 0.5
m m) 0.5
mglKg (ppm) 50.
m gfK. ( m) 50.
Com ound
Concentration
TPH gasoline 410.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
~?-7
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
.
e
11111111111
11 l1'~I'·, . /'1 I~1111 I
lIMC).O?\1
laLaboratorít£5" II I
IIIL
Cert¡Red bV the State of Cahfornlc DeOC\rtmef'lt of Health Services
lübCf'üttt')-' # ")'2(1
1701 Westwhul Dr. Suite 103
Bake-rsfield, C,"" 93301
. Phone: 805-328·0902, Fa.'\:: 805-328-1129
/111
Report of Analysis
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: C 1-45'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A482
Date of sampling: May 18, 1994
Date of analysis: May 31, 1994
Date of Report: June 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethylbenzene
X lenes
0.8
2.1
1.2
7.0
mg/Kg (ppm)
mg/Kg (ppm)
mglKg (ppm)
m IK m)
0.5
0.5
0.5
0.5
TPH gasoline 450.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
50.
50.
~~
Rafael Espinosa Leniz, Ph. D.
Laboratory Director.
.
.
II 11111111
I !IIP":- I "'11111111
, IIL\LC). O~
{i .... I
j I -j( '1 b Ú t· ,-d- 0 [·1 ... 1-' I
¡/ ) ,~l.... ~. ·~n . E :ö . t
"
Certified bl,J the State of California Department of Health Serw:es
iLab«at«y # .\)~
1701 Westwind Dr. Suite 103
Bakersfield, C,",- 93301
Phone: 805-328-0962, Fax: 805-328-1129
,¡III
IIIL
Report 0' Analysis
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: Cl-50'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A483
Date of sampling: May 18, 1994
Date of analysis: May 31, 1994
Date of Report: June 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethy lbenzene
X lenes
1.0
2.9
2.6
12.
mg/Kg (ppm)
mg/Kg (ppm)
mg/Kg (ppm)
m fK. m)
0.5
0.5
0.5
0.5
TPH gasoline 1700.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
50.
50.
~?-¿
Rafael Espinosa Leniz, Ph. D.
Laboratory Director.
I
I
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¡!,\¡]Lftùoratories'.¡ III
CertJñed by the State of California DeCX)rtment of Health Services
Lðbu'ðtuy # .<)~
1101 Westwilld Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-328-09132, Fax: 805·328·1129
11111
Ilk
Report 0' Analysis
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: C 1-55'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A484
Date of sampling: May 18, 1994
Date of analysis: May 31, 1994
Date of Report: June 1, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethy lbenzene
X lenes
1.5
3.1
2.9
11.
mg/Kg (ppm)
mg/Kg (ppm)
mglKg (ppm)
m /K m)
0.5
0.5
0.5
0.5
TPH gasoline 2300.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
N A = Not Analyzed
50.
50.
~?-7
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
e
11111111111
1111111111", "',"111111
II I~AlACYO,N .
¡kJLabúratúrtcz
Certlfed ::",' t:",e State of (a'ifOrnia DerxFtme'1t of rlealth S€rvice3
l.alb«"awO' # I<)~'
1701 U~st,whul nr. Suite 10:1
Bnkel"sfield!, C,\. 93301
Pt~one: .805-:328-0962. Fax: 805-328-1129
¡ III
Illh.
Report of Analysts
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: CI-60'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A485
Date of sampling: May 18, 1994
Date of analysis: May 31, 1994
Date of Report: June 2, 1994
Benzene
Toluene
Ethylbenzene
X lenes
1.0
1.8
2.4
3.1
Units L*
mgIKg (ppm) 0.5
mgIKg (ppm) 0.5
mgIKg (ppm) 0.5
m m 0.5
mgIKg (ppm) 50.
m m 50.
Com ound
Concentration
TPH gasoline 1100.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
~?--;
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
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JI1IIIIII"" "''1111111
! I Ilf\I~C~~ON ..
!!aLaboratoríez II
:=ertlfcd:"J c-,\;\ State of (a'ifornio Deoo:t.m.¿;,1t of Health ~r"ices
LðJJ<:'f'at-vIrY II iI'}2{'
1701 't'~~-twind nr. Suit~ IU:I
Rnkel"Sfield~ {~['- 93301
PtlO~: 805-3213-0962. FeJx: 0905·328·1129
¡IIII
11111,
Report of Analysis
Project Pence Petroleum
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: Cl-65'
Company: Aquageosciences Matrix: Soil
1701 WestwindDr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A486
Date of sampling: May 18, 1994
Date of analysis: May 31, 1994
Date of Report: June 2, 1994
Benzene
Toluene
Ethylbenzene
X lenes
ND
ND
ND
1.0
Units L*
mglKg (ppm) 0.5
mg/Kg (ppm) 0.5
mgIKg (ppm) 0.5
m m 0.5
mgIKg (ppm) 50.
m m 50.
Com ound
Concentration
TPH gasoline 100.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
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1111I l1", r ''':'111111 I
l-W..C) ON
I
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,illl 11111t,
::ertlfecJ :;y t;',e State of Co iforílio [)cpa ·tme,1t of t !eolth Serollces
l.ðIJ4)f{lt«)' # 1'J:,2{'
1701 n'~stwhlfl Ur. Suite IU:I
Ðn.kel"'Sneld~ (:!\ 93301
p~)OrK:: 805-328-0962, F<1x: S05·328-11:''9
Report of AnalysIs
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: Cl-70'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A487
Date of sampling: May 18, 1994
Date of analysis: June 1, 1994
Date of Report: June 2, 1994
Benzene
Toluene
Ethylbenzene
X lenes
0.5
1.3
0.8
3.8
Units PQL*
mglKg (ppm) 0.2
mglKg (ppm) 0.2
mgIKg (ppm) 0.2
m m 0.2
mglKg (ppm) 20.
m m 50.
Com ound
Concentration
TPH gasoline 380.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
~0
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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111]1 iQ"C{ bo rat 0 rt es' !ill!
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::cr(¡fed .::y ("I:; State of (oif'C)fI',io Dccc: "t,,.,e,1( of Health :)ru"ce"õ
!Lð1)~,.atc.r}· # œ'J'2(
1701 \t'pstwhul Ih·. SIIU{" 10:1
Dßk~l"Sìield~ (:,\ 93301
Pf10ne: 805·32·'3-09':'2, F<:1x: .'305·328-11:''9
Report of AnalysIs
Project Pence Petroleum
Test: 8015m/8020/5030 Total Petrolemn Hydrocarbons &
BTEX's by Purge and Trap Sample: CI-75'
Company: Aquageosciences Matrix: Soil
1701 WestwindDr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A488
Date of sampling: May 18, 1994
Date of analysis: June 1, 1994
Date of Report: June 2, 1994
Benzene
Toluene
Ethylbenzene
X lenes
0.5
1.2
0.7
2.3
Units PQL*
mglKg (ppm) 0.2
mgIKg (ppm) 0.2
mgIKg (ppm) 0.2
m m 0.2
mgIKg (ppm) 20.
m m 50.
Com ound
Concentration
TPH gasoline 130.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
~0
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
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II II ¡ I ¡ I! i I
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:,",: ~>1:::0:~ :;,; ~"i¡¿ 'Jr.cte ~f (0 11'Q;'lol:C ;:-:.;;:c r -,~;'·:I·~t cf ~ '~c~th ~~ :~...IC;;:'
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1701 \t'~sh\;ind Ih", Snit..· loa
IJßkel-siield~ C\ 93:J01
!-':~ün(:': .<:>"='5-3:2,S-C<)i:,:2 F:I',: .:>'05-318· ¡ 1:::'9
¡I !'I H i ¡
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d: h! J J!!i\:,L
Report of Analysis
Project Pence Petroleum
Test: 80 15m/8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: C 1-80'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A489
Date of sampling: May 18, 1994
Date of analysis: June 1, 1994
Date of Report: June 2, 1994
Benzene
Toluene
Ethylbenzene
X lenes
0.2
0.5
0.2
1.5
Units PQL*
mglKg (ppm) 0.2
mgIKg (ppm) 0.2
mg/Kg (ppm) 0.2
m m 0.2
mg/Kg (ppm) 20.
m m 50.
Com ound
Concentration
TPH gasoline 80.
TPH diesel NA
*PQL = Practical Quantitation Limit
~TI = No detected at given PQL.
NA = Not Analyzed
ß/~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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nnke.·siield. C\ ~)3301
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,j .. . . . ¡ . . " . ,,' .
Report of Analysts
Project Pence Petroleum
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: C 1-85'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
BakersfielcL CA 93301
Contact person: Patrick MCCullough Lab #: 94A490
Date of sampling: May 18, 1994
Date of analysis: June 1, 1994
Date of Report: June 2, 1994
Com ound
Concentration
Units
PQL*
Benzene
Toluene
Ethylbenzene
X lenes
0.4
1.5
1.4
8.2
mgIKg (ppm)
mgIKg (ppm)
mgIKg (ppm)
m
0.2
0.2
0.2
0.2
TPH gasoline 1900.
TPH diesel NA
=
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
20.
20.
///0
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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jl"!Ii'I!II" "'l jlll I¡1
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Report of AnalysIs
Proj ect Pence Petroleum
Test: 8015m18020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: C 1-90'
Company: Aquageosciences MatIix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A491
Date of sampling: May 18, 1994
Date of analysis: June 1, 1994
Date of Report: June 2, 1994
Benzene
Toluene
Ethylbenzene
X lenes
0.4
1.3
0.8
5.6
Units PQL*
mg/Kg (ppm) 0.2
mg/Kg (ppm) 0.2
mg/Kg (ppm) 0.2
m ill 0.2
mg/Kg (ppm) 20.
m ( m) 20.
Com ound
Concentration
TPH gasoline 1200.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
,
Ra~'~z, Ph.D.
Laboratory Director.
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1'111111111" '. . ''11(1/111 II!
¡II )' II U C"707\' '
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!, . I!I
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I' ¡Ii
CcrtiFed i.:;y the State of Co'iforfÎio ~pcFtrnelÌt of Health Ser,iœs
Lð1J«atc;n' # 1'J2(:'
1701 '''..sturlnd nr. Suit.. 10:1
Bnke1"sfield~ C,\ 93301
Pt10ne: 805-328-0962, Fê1:c .'305-328·11::''9
.1111 11111i.
Report of Analysts
Project Pence Petroleum
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: CI-95'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A492
Date of sampling: May 18, 1994
Date of analysis: June 1, 1994
Date of Report: June 2, 1994
Benzene
Toluene
Ethylbenzene
X lenes
0.2
1.0
0.6
4.1
Units P L*
mgIKg (ppm) 0.2
mgIKg (ppm) 0.2
mgIKg (ppm) 0.2
m m 0.2
mglKg (ppm) 20.
m m 20.
Com ound
Concentration
TPH gasoline 650.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
R~~niz, Ph.D.
Laboratory Director.
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11 J lIé\IC}{O~T· :
IlaLaboratoríez I I
I .
¡IIIII Illh.
(ertlf~cJ cy t:-,e State of (cHfomia ~oo(tment of Health Sef\lices
lLana-ate,"')' # 11)'2(\
.,. ,',"
1101 U('ostwind nr. Suite 10:1
ßnkel"Sfie)d~ (;1\ 93301
P110ne: 805-328-0962, Fax: 805·328'11:''9
Report of AnalysIs
Project Pence Petroleum
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: C 1-1 00'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield> CA 93301
Contact person: Patrick MCCullough Lab #: 94A493
Date of sampling: May 18, 1994
Date of analysis: June 1, 1994
Date of Report: June 2, 1994
Com ound
Concentration
Units
P L*
Benzene
Toluene
Ethylbenzene
X lenes
ND
ND
ND
0.5
mg/Kg (ppm)
mg/Kg (ppm)
mg/Kg (ppm)
m m
0.2
0.2
0.2
0.2
TPH gasoline 40.
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
20.
20.
~t!--7
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
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I-Ir\J~CY00J I
JI¡JLabûratoríe% I II
'I(
,illll' 1111111.
:::ertlfcd :.:'~ ('-,e State of Ca'ifornia Department of Heclth Services
UUU)f()t,vn' # I<JW
..
1701 \t'..stwhul I)r. SuitelO:J
Dnkersfield, C¡\ 93301
Pll0nè: 805-3213-09'32, F<J:<: .905·328·1129
Report of AnalysIs
Project Pence Petroleum
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons &
BTEX's by Purge and Trap Sample: C1-105'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A494
Date of sampling: May 18, 1994
Date of analysis: June 1, 1994
Date of Report: June 2, 1994
. .
Benzene
Toluene
Ethylbenzene
X lenes
ND
0.005
ND
0.010
Units P L*
mg/Kg (ppm) 0.005
mg/Kg (ppm) 0.005
mg/Kg (ppm) 0.005
m m 0.005 .
mg/Kg (ppm) 0.5
m 0.5
Com ound
Concentration
TPH gasoline ND
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
,Ad(L--;
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
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11111111111
11111"1'" ""I'IIII! I
I-IAI~CYON
h1L[{boratoríe~ I
CertiFød b'} the State of Co:ifornio Deoortrne'1t of r-Ieolth SeMceS
Lab«at«Y # I'J~
, .
"
1701 \fe~-twhl(l nr. Suite 10:)
Bnkersfield~ C!\ 93301
Phone: 805·328-0962, F¿¡x: 805-328·11~>g
,illl 1111h,
Report 0' Analysts
Project Pence Petroleum
Test: 8015mJ8020/5030 Total Petrolemn Hydrocarbons &
BTEX's by Purge and Trap Sample: C 1-11 0'
Company: Aquageosciences Matrix: Soil
1701 Westwind Dr. Suite 101 Analyst: MCM
Bakersfield, CA 93301
Contact person: Patrick MCCullough Lab #: 94A495
Date of sampling: May 18, 1994
Date of analysis: June 1, 1994
Date of Report: June 2, 1994
. ..
"
Benzene
Toluene
Ethylbenzene
X lenes
0.005
0.020
0.010
0.080
Units P L*-'
mg/Kg (ppm) 0.005
mgIKg (ppm) 0.005
mglKg (ppm) 0.095
m m 0.005 ...
mg/Kg (ppm) 0.5
m m 0.5
Com ound
Concentration
TPH gasoline 6.5
TPH diesel NA
*PQL = Practical Quantitation Limit
ND = No detected at given PQL.
NA = Not Analyzed
~
Rafael Espinos Leniz, Ph.D.
Laboratory Director.
e
e
APPENDIX D
Acceptable Cumulative Soil Contamination Levels
.""'....
.." ......
...... .ç.~.., '<
'."'¡:'. "
:,,,:,,.
TABLE 2-4
I1EIIZ£IIE
ACŒPTABlE QIIJlATlVE SOil IXWTAMlllATlot lEVELS
FOR PROTECTlot OF GROUND WATER AT QUALIFIED SITES
Stop: Do not use this table unles!; the site In question has been screened using the applIcability checklist (Table 2-2) for general risk appraisal to protect ground water
IN
0 5.1 6.1 7.1 8.1 9.1 10.1 11.1 12.1 14.1 16.1 . 18.1 20.1 22.1 24.1 26.1 28.1 30.1 32.1 34.1 36.1 38.1
to 5 to 6 to 7 to 8 to 9 to 10 to 11 to 12 to 14 to'16 to 18 to 20 to 22 to 24 to 26 to 28 to 30 to 32 to 34 to 36 to 38 to 40
5-9.9 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
10-14.9 5 3 2 1 0 0 n -Il 0 0 0 0 0 0 0 0 0 0 0 0 0 0
15-19.9 10 10 6 3' 1 o / 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
20-21, 9 60 40 20 10 5 21[ ,- .. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
25-29.9 200 100 60 30 10 7 - 3 1 - ~ 0 0 0 0 0 0 0 0 0 0 0 0 0
30-34.9 800 400 200 100 40 20 1() 4 1 0 0 0 , 0 0 0 0 0 0 0 0 0
35-39.9 1000 1000 700 300 100 60 20 10 .3 1 '0 0 0 0 0 0 0 0 0 0 0
/'0-/'/'.9 1000 1000 1000 1000 400 ·100 80 30 -9 2 0 0 0 0 .0 0 0 0 0 0 0 0
45-49.9 1000 1000 1000 1000 1000 'i00 200 100 20 4 1 1 0 0 0 0 0 0 0 0 0 0
50-5/'.9 1000 100n 1000 1000 1000 1000 600 200 50 9 2 2 1 1 0 0 0 0 0 0 0 0
55-59.9 1000 1 noD 1000 1000 1000 1000 1000 700 100 20 5 3 2 1 1 0 0 0 0 0 0 0
60-61,.9 1000 1000 1000 1000 1000 1000 1000 1000 300 40 9 6 4 3 2 1 1 0 0 0 0 0
6'i-69 9 1000 1000 1000 1000 1000 10[10 1000 1000 700 8 10 10 8 5 3 2 1 1 0 0 0 0
70-71.. 9 1000 1000 tOaD 1000 1000 toaD 1000 tOOO 1000 to 30 20 10 9 6 /, 2 1 1 0 0 0
75-79 9 1000 1000 1000 1000 1000 1noo 1000 1000 1000 30 60 40 20 10 10 7 /, 2 1 1 0 0
80-81, 9 1000 1000 1000 1000 1000 1000 1000 1000 1000 700 100 70 40 30 10 10 7 I. 2 1 1 0
85-89.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 200 100 80 50 30 10 10 7 /, 2 1 0
90-91..9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 400 200 100 90 50 30 10 10 6 3 2 1
95-99.9 1000 1000 1000 1000 1000 16M 1000 1000 1000 1000 700 400 200 100 90 50 30 10 10 5 3 1
100-104_9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 800 400 200 100 90 50 20 10 8 4 2
105-109.9 \000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 800 400 200 100 80 40 20 10 7 3
110-111..9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1dOO 1000 1000 1000 800 /,00 200 100 70 30 10 10 5
115-119.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 700 1.00 200 100 50 20 10 7
120-121..9 1080 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 600 300 100 90 /,0 20 10
125-129.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 500 200 100 60 30 10
130-13/'.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 900 400 200 100 1.0 20
135-139.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 700 300 100 60 t
1/'0-11.1..9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 500 200 100
145·11.9.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 700 300 100
150+ 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 500 200 90
/
MEAN ANNUAL INCHES PRECIPITATION
DISTANCE
TO
HIGHEST
GROOND
\lATER
F R()4
SOIL
SAMPLE
FEET
Note: Individual concentrations for any soil sample cannot exceed 100 ppm. The numbers In this table do not represent soil concentrations; they reflect the accumulation of
pollutont mass in contaminated soil. These numbers can be derived from the LUFT manual worksheet (Table 2-3).
43
·4"~"':,·
-..:..,....
.... -
. .'\-
.- ~-~ ._~.-.-
... " ."
- - -
~t:~.·.,;· ......~.;. . .'.. . '0'''':'_ "':_. :_..._~.".'"
;.....:":.-:...:..~..
..........-. . .
. ....... . .
..__ 0- ~
..··r-··
TABLE 2-5
TOl.LУ
ACCEPTABLE aJU..ATlVE SOIL CDffMIICATUII LEVELS
FΠPROTECTUJI Of GRaM) \MTER AT QUALIFIED SITES
Stop: Do not use this table unless the site In question has been screened using the applicability checklist CTable 2-2) for general risk appraisal to protect ground water
MEAN ANNUAL INCHES PRECIPITATION
IN
0 5.1 6.1 7.1 8.1 9.1 10.1 11.1 12.1 14.1 16.1 18.1 20.1 22.1 24.1 26.1 28.1 30.1 32.1 34.1 36.1 38.1
to 5 to 6 to 7 to 8 to 9 to 10 to 11 to 12 to 14 to 16 to 18 to 20 to 22 to 24 to 26 to 28 to 30 to 32 to Yo to 36 to 38 to 40
liD 5 ,
5-9.9 70 30 20 10 8 3 1 , 1 1 1 0 0 0 0 0 0 0 0 0
10-14.9 200 100 100 70 40 20 10 8 , 2 -, 1 1 1 I 1 1 0 0 0
15-19.9 1000 .00 400 200 100 60 30 10 t -,- 4 3 3 2 2 2 1 1 1 1 0
20-24.9 1000 I 00 1000 700 300 100 90 40 Yo 8 7 6 5 4 3 2 2 2 1 1
25-29.9 1000 1 10 1000 1000 1000 500 200 100 10 10 10 9 7 5 4 3 2 2 1
30-34.9 1000 I 0 1000 1000 1000 1000 600 200 100 30 20 20 10 10 9 7 5 4 3 2 1
35-39.9 1000 1 0 1000 1000 1000 1000 1000 600 200 100 60 40 30 20 20 10 10 8 6 " :5 2
40-".9 1000 1000 1000 1000 1000 1000 1000 1000 600 '00 100 80 60 40 30 20 10 10 9 6 4 3
45-49.9 1000 1000 1000 1000 1000 100 1000 1000 1000 400 200 100 100 80 50 40 20 20 10 9 6 4
50-54 9 1000 1000 1000 1000 1000 100 1000 1000 l; 1000 400 300 200 100 100 60 1,0 30 20 10 9 5
55-59.9 1000 1000 1000 1000 1000 100 10 00 1000 100! 800 500 300 200 100 100 70 40 30 10 10 7
60-64.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1 DO! ~o 1000 600 400 200 100 100 70 40 20 10 10
65-69.9 1000 1000 1000 1000 1000 1000 Oft 1000 1000 1001 1000 1000 1000 700 400 300 100 - 100 60 '0 '0 10
70-71,.9 1000 1000 1000 1000 1000 1000 ~OO 1000 1000 1001 1000 10no 1000 1000 800 400 200 100 100 50 30 10
]5-79 9 1000 1noo 1000 1000 1000 1000 1000 1000 100/ 1000 1000 1000 1000 1000 800 '00 '00 100 80 40 2õ1
80-84 9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 700 400 200 100 óO -Jljl
85-89 9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 600 300 100 80 4õ
90-94.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 900 1,00 200 100 50
95-99.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 -1000 1000 1000 1000 700 300 100 7õ
100-101. 9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 lOaD 1000 400 200 90
105-109.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 600 200 1
110-11t..9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 900 400 1
115-119.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 500
120-124.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 700
125-129.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
130-131,.9 1000 1000 1000 1000 1000 1000 10 0 1000 1000 -1000 - 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 00
135 -139.9 1000 1000 1000 1000 1000 1000 1 0 1000 1000 1000 000 1000 1000 - 1000 1000 1000 1000 1000 1000 1000 1000 600
140-1'1,.9 1000 1000 1000 1000 1000 1000 1 0 1000 1000 1000 000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 OM
145-149.9 1000 1000 1000 1000 1000 1000 ~oo~ 1000 1000 -1000 1000 1noo 1000 1000 1000 1000 1000 1000 1000 1000 1000 1Mi\
150+ 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
e
DISTANCE
TO
HIGHEST
GROOND
\lATER
F R C»1
SOIL
SM4PLE
FEET
Note: Individual concentrations for' any soil semple cannot exceed 80 ppm. The numbers fn this table do not represent soil concentrations; they reflect the accumulatfon of
pollutant mess in contaminated soil. These nlJ1bers Can- be derived ·from the .LUF-T..III8~l worksheet (Table 2-3).
44
TABLE 2-7
ETHYUIE1IZfIIE
AŒEPTABlE D.IIJlATlVE SOIL OOIfTNUNATJON lEVELS
f(Jt PttOTECTION OF IiRCUI) 'MTER AT ClJAlIFIED SITES
Stop: Do not use this table unless the sfte In questfon hu been screened using the eppllcabft fty checklist (Table 2-2) for general risk appraisal to protect ground water
MEAN ANNUAL INCHES PRECIPITATION
0 5.1 6.1 7.1 8.1 9.1 10.1 11.1 12.1 14.1 16.1 18.1 20.1 22.1 24.1 26.1 28.1 30.1 32.1 34.1 36.1 33.1
to 5 to 6 to 7 to 8 . to 9 to 10 to 11 to 12 to 14 to 16 to 18 to 20 to 22 to 24 to 26 to 28 to 30 to 32 to 34 to 36 to 33 to 1,0 -
5-9 9 300 '00 100 100 70 40 30 20 10 0 '., 10 9 8 8 7 6 6 5 5 5 4 ,
10-1l, 9 100 ~ 500 300 200 100 70 . 40 0 0 10 10 10 10 10 9 8 8 7 6 5 ..
15-19 9 100 1000 1000 500 II 00 0 . -20 0 20 10 10 10 10 10 9 8 1 6
20-24 9 100 'MO 1000 1000 100n 00 1 .411 0 ':to 20 0 20 10 10 10 10 8 7
25-29 9 1000 1000 1000 1000 1000 00 0 ...1 10 0 40 40 0 20 20 10 10 10 10 9
30-34.9 1000 1000 1000 1000 1000 1 00 0 100 ~ 70 60 0 40 30 20 20 10 10 10
DISTANCE 35-39 9 1000 10M 1000 1000 1000 1 liDO 0 10n 110 100 90 70 50 40 30 20 20 10 10
40-1,4 9 1000 fOOo 1000 1000 1000 ,nN 1 0 1000 1000 '~OO '00 100 100 100 80 60 40 ·30 20 20 10
TO 45-49 9 1000 :311 1000 1000 1000 ~ 1000 1000 1000 400 300 '1>0 200 100 100 80 60 40 30 20 10
-54.9 10011 1000 1000 1000 10 1 Mö! 1000 1000 11100 700 500 400 300 200 100 100 80 60 40 30 ~J
HIGHEST -59 9 1000 10õõT 1000 1000 1000 1000 1~nnl '000 1000 1000 nno 900 i 400 300 200 100 100 80 50 40
-~ 9 1000 ~:i 1000 1000 1000 10001 It 1000 1000 .000 1000 700 500 300 200 100 100 70 50
GRooMO 5-69.9 1000 1000 1000 1000 10nol 1000 1000 10 1-:"11 1000 "000 1000 700 1,00 300 200 100 90 60
70-74.9 1000 1000 1000 1000 1000 1000 -fooo . 1000 1000 1000 1000 1000 700 400, 200 100 100 70
WATER -79 9 1 Don 1000 1000 1000 1000 1000 10M 1000 1000 1000 1000 1000 1000 1000 1000 1000 600 400 200 100 90 SO
0-84.9 1000 1000 1000 1000 1000 "1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 800 -';00 :-joo 100 100 7IJ
FROM 5-89 9 1000 1000 1000 1000 1000 1000 1nM 1000 1000 ·1000 1000 1000 '000 1000 1000 1000 1000 700 400 200 100 MI
90-94.9 1000 1000 1000 1000 1000 100n 10nn 1000 1000 1000 ,000 1000 1000 1000 1000 1000 1000 900 500 300 1001 1001
SOIL 95-99.9 1000 1000 1000 1000 1000 1000 :j¡: 1000 1000 100n 1000 1000 1000 1000 tOaD 1000 tOOO 1000 700 400 200 1
1100-104 9 1000 = 1000 1000 1000 ==' 1000 1000 10~0 '1 1000 1 00 1000 1000 1000 1000 1000 900 500 200 1 e
SAMPLE 10 -109 9 100 1000 1000 1000 1000 1000 ,oon 1000 ] 1 00 1000 1000 1000 1000 1000 600 300
11 -114.9 100 ~ 1000 1000 1000 1 õõl 1001) 1000 II 10llO 1000 1000 00 1000 1000 = 1000 1000 800 400
IN 11 -1199 100 1000 1000 1000 1 DOl -, 00 1000 -'-000 1000 1000 1 1 00 1000 1000 "'1M0 1000 1000 IJ
12 -124 9 1000 10001 1000 1000 1000 1001 1 iõ 1000 1000 I: 000 1000 ' 10 1 DO 1000 1000 1000 10M 1000 1000
FEET 125-129.9 1000 110lH 1000 1000 1000 1001 1 10 000 1000 l' 000 1000 10 1000 1000 1000 1000 1000 1000 1000
130-134 9 1000 1 100\ 1000 1000 1000 1001 , 0 1000 1000 . . 1 000 1000 1000 1000 1000 1000 1000 1000 1000 1000
135-139 9 1000 1 Inn I 1000 1000 1000 Itl~ 1000 1000, .1000 :; 10 1000 1 00 1000 1000 1000 1000 1000 1000 1000
140-144 9 1 Don 1 IOn 1000 1000 1000 H 1000 1000 " .1000 oo~ 1000 .1 00 1000 1000 1000 1000 1000 1000 10M .>
145-149 9 1000 100n 1000 1000 1000 000 1000 10011 ,,, 10M 1000 100 1000 1000 1000 1000 1000 1000 1000 '1DD1
150t 1000 1000 1000 1000 1000 1000 1000 1000 1000,,;.,1000 ",1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 ...900
.;.:.,., h ,-,'
Not.: IndivIdual concentretlona for any soIl sample cannot, exceed 40 ppm. The ~r'ifn thfs table do nOt rePresent soil concentratIons; they reflect the acc~letfcn' of
pollutant mass In cont~lnated soil. These number. can. be derfved from. the. LUFT ·manual worksheet (Table 2-3).
46
" -""~;·"""-"~'--"-·-'--.-~-4).it.l!. .klþj~1Ù ~"J.fi~
~
~~r-
y;" '-6
~.__.Æ
ACŒPTABLE aJIJlATlVE SOIL alfTNUIlATlOI LEVELS
fOR PROTECTlOI Of .CiIKUI) IMTER AT ClUALIfIED SITES
Stop: Do not use this table unless the site in question has been screened using the applicabilIty checklist (Table 2-2) for general risk appraisal to protect ground Ilater
MEAN ANNUAL INCHES PRECIPITATION
IN
0 5.1 6.1 7.1 8.1 9.1 10.1 11.1 12.1 14.1 16.1 18.1 20.1 22.1 24.1 26.1 28.1 30.1 32.1 34.1 36.1 38.1
to 5 to 6 to 7 to 8 to 9 to 10 to 11 to 12 to 14 to 16 to 18 to 20 to 22 to 24 to 26 to 28 to 30 to 32 to 34 to 36 to 38 to 40
5-9.9 100 100 90 60 40 30 20 10 10 9 1 1 6 6 5 5 5 4 4 4 '3 3
10-14.9 600 400 300 200 100 80 50 30 '0 10 10 10 10 9 8 8 7 6 5 5 4 4
15-19.9 1000 1000 1000 600 400 200 100 70 4 20 0 10 10 10 10 10 10 9 8 7 6 5
20-24 9 1000 1000 1000 1000 1000 600 300 100 -/I 50 0 30 -'0 20 10 10 10 10 10 9 1 6
25-29.9 1000 1000 1000 1000 1000 1000 100 100 100 90 0 40 40 30 20 20 20 10 10 10 9 8
30-34.9 1000 1000 1000 1000 1000 1000 1000 700 300 100 90 10 60 50 40 30 20 20 10 10 10 9
35-39.9 1000 1000 1000 1000 1000 1000 1000 1000 600 200 100 100 100 80 60 50 1,0 30 20 20 10 10
40-1,4.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 500 200 200 100 100 90 70 50 40 30 20 10 10
45-49.9 1000 1000 1000 1000 1000 1000 1000 1000 10no 800 4 0 300 200 100 100 100 80 60 40 30 20 10
50-54.9 1000 1000 1000 1000 1000 1000 1000 1000 100 °EU 500 00 200 200 100 100 80 60 40 30 20
~-50"9 1000 1000 1000 1000 1000 1000 1000 1000 . 100 o 1 1 800 .00 1000 300 200 100 100 80 50 30 20
60-610 9 1000 1000 1000 1000 1000 1000 1000 1000 10 o 1 000 100 600 1000 300 200 100 100 70 100 3D
65-69 9 1000 1000 1000 1000 1000 1000 1000 !! I ¡¡, . 1000 1non 00 1 100 700 1000 300 200 100 90 M 40
70-110.9 1000 1000 1000 1000 1000 1000 1000 1000 1nnn 1000 000 1100 1000 -600 1000 :>00 100 100 70
75-79 9 1000 1000 1000 1000 1000 1000 1000 1000 II 1000 )00 1 100 1000 1000 600 1000 200 100 90
80-84 9 1000 1000 1000 1000 1000 1000 1000 1000 100 1000 1 1000 000 1 000 1000 1000 900 00 300 200 100
85-89.9 1000 1000 1000 1000 1000 1000 1000 1000 10 1000 . 1noo 1000 1000 1 000 1000 1000 1000 0 400 200 100
90-94.9 1000 1000 1000 1000 1000 1000 1000 1000 1 ~j ~ 1000 1000 1 00 1000 1000 1000 1 0 600 300 100 100
95-99.9 1000 1000 1000 1000 1000 1000 1000 1000 1 000 1000 1100 1000 1000 1000 0 800 400 200 100
100-101,.9 1000 1000 1000 1000 1000 1000 1000 1000 100 1000 000 10 00 1 00 1000 1000 1000 1~ 1000 500 300 100
105-109 9 1000 1000 1000 1000 1000 10 00 1000 000 100 1 non 000 1 ann 1 00 1000 1000 1000 1000 1000 700 400 ~
110-114.9 1000 1000 1000 1000 1000 1000 1000 000 100 '. 1000 1000 10 iOO 1000 1000 1000 1000 1000 1000 900 500 7M1
115-119.9 . 1000 1000 1000 1000 1000 10M 1000 000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 600 3001
120-124.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 800 '00
125-129.9 1000 1000 1000 1000 1000 1000 DOC 1000 100 o ~ .1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 400
130-134.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 500
135-139.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 600
140-141,.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 800
145-149.9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
150+ 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 . 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
e
DISTANCE
TO
HIGHEST
GROOND
YATER
FR~
SOIL
SAMPLE
FEET
e
Note: Individual concentrations for any soil sample cannot exceed 40 ppm. The numbers In this table do not represent soil concentrations: they reflect the accumulation of
pollutant mess In contaminated soil. These numbers can be derived from the' LUFT manual worksheet (Table 2-3).
45
. "
~ ....\"...
. " . ...... '-r.-.
~~ -I."';Jr'~~r:.~:. ''-:.~!;;::.;1~.:'~'''''~'~-~''.''--'''''' ..''''''"--;;;:'".=-......-. ···.,--_·.-.6 --....,.........---
. -.". ~ .- ,.
..-...~._....t.......... "..'
~._- .... .~..-_._.--,....--._--
.- - ~.
·r··...... ..
_\~. 'r¡¡"t?
--
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d;~undwater Scientists · Environmental Consultants
Additional Air/Vapor Inlet Wells
901 E. Truxtun Avenue
Bakersfield, California
Presented To:
Mr. Robb Pence
Presented By:
AquaGeosciences, Inc.
November, 1993
~ ¡~X/ ~Á~
. \ 'q,:'" ~ "';",
'.J ~i( L~b /' ~/ - No 4779 1)
Phil~p ~oatWin, R.G. # 4!79 '~j. "~;~,
Principal Hydrogeologlst <t~£:zÞy
--'
O~ [g \~~;\í~
ø!6i!Ø3 ~
1701 Westwind Drive, Suite 101 · Bakersfield, California 93301
10'"'<;:\'1,,)0,",(1;:;") . J:^VIQ,",<;:\'1")O"")(1
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TABLE OF CONTENTS
Page #
1.0 EXECUTIVE SUMMARY 1
2.0 INTRODUCTION 1
2.1 Facility Description 1
2.2 Project History 2
3.0 SCOPE OF WORK 5
4.0 FIELD ACTIVITIES 5
5.0 SOIL BORINGS 5
5.1 Boring Methods 6
5.2 Soil Sampling 6
5.3 Field Screening of Soil Samples 6
5.4 AirNapor Inlet Well Installation 7
5.5 Analytical Results 8
6.0 DISCUSSION OF DRILLING AND ANALYTICAL RESULTS 9
7.0 SITE GEOLOGY 10
8.0 CONCLUSIONS 10
9.0 LIMITATIONS 11
Exhibit 1
Exhibit 2
Exhibit 3
Exhibit 4
Exhibit 5
Exhibit 6
Exhibit 7
Exhibit 8
EXHIBITS
Vicinity Map
Site Map
Soil Sample Location Map
VI-4 Completion Detail
VI-5 Completion Detail
VI-6 Completion Detail
Cross Section A-A'
Cross Section B-B'
APPENDICES
Appendix A Boring Logs
Appendix B Analytical Results and Chain-of-Custody: Soil Borings
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1.0 EXECUTIVE SUMMARY
Gasoline impacted soils were discovered during the removal of three underground
fuel tanks in November, 1989 at the Pence Petroleum Company facility located at 901
E. Truxtun Avenue in Bakersfield, California. Laboratory analysis revealed soil
beneath the former tanks and dispenser was impacted with petroleum hydrocarbons.
In July and November 1990 four soil borings were advanced a maximum depth of 120
feet below surface grade, but failed to define the vertical and lateral extent of the
plume. In October 1991 a Site Assessment to define the extent of impacted soils and
install vapor inlet and extraction wells was performed by AquaGeosciences Inc. (AGI)
in which four soil borings were advanced and sampled. The borings were advanced
beneath the former tank cluster and dispenser island where the highest levels of
petroleum hydrocarbons were previously detected. The interpretation of data
collected showed that soils beneath the former gasoline tank cluster are impacted to a
depth ranging between 71.5 to 86 feet below the surface grade (bsg) in VI-4 to
between 100 and 105 feet (bsg) in boring VE-1, and below 120 feet (bsg) at the B3A
location. Subsequent to the installation of the additional vapor inlet and extraction
wells a remedial program was initiated using an internal combustion engine to remove
the soil vapors from the impacted area and to destroy the hydrocarbons entrained in
the vapor stream.
Additional airlvapor inlet wells were drilled and installed in October, 1993 to enhance
the remedial program and soil samples were collected to evaluate the effectiveness of
the remediation to date. Laboratory analysis of soil samples collect from the additional
wells indicated the petroleum constituents have been significantly reduced in
concentration and that TPH as gasoline concentrations has been significantly reduced
in all but the southern portion of the plume.
2.0 INTRODUCTION
Rob Pence of Pence Petroleum Company, authorized AquaGeosciences, Inc. (AGI) to
install airlvapor inlet wells as part of the ongoing soil vapor remediation operations at
the subject site located on East Truxtun Avenue. This report presents a summary of
the field operations, laboratory analyses, and a discussion of the analytical results of
this project.
2. '1 Facility Description
The site, known as Pence Petroleum Company, is located at 901 E. Truxtun Avenue,
on the southeast corner of East Truxtun and Beale Avenues in Bakersfield, California
(Exhibit 1). The property parcel number is APN 017-160-07-00-0.
The property is currently unoccupied and was formerly operated as Pence Automated
Fuels by the Pence Petroleum Company. Prior to 1986, the site was owned by Davies
Oil, Bakersfield, California, and was used as an automated cardlock fueling station.
1
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Exhibit 2 shows the former locations of the site facilities, as well as the former borings
and existing wells.
Positioned to the south-southeast of downtown Bakersfield, land use surrounding the
site is varied in nature ranging from Light and Service Industrial to High Residential as
indicated by the Metropolitan Bakersfield 2010 General Plan - East Map (3-7-90,
updated 10-14091). On three sides (north, west, and south) the site abuts public
streets (East Truxtun, Beale, and East 18th Street, respectively). To the east, at 985
East Truxtun, is Signet Hardware, Inc. Residential areas lie to the south and southeast
of the site.
2.2 Project History
In 1986 Pence Petroleum purchased the site from Davies Oil of Bakersfield. On
November 1, 1989, two (2) 6,000-gallon underground gasoline storage tanks, one (1)
10,OOO-gallon underground gasoline storage tank, one dispenser island and
associated product lines were removed from Pence Petroleum's Automated Fuels
Cardlock. Soil samples were collected from 2 and 6 feet beneath the former tanks at
the time of their removal as shown on Exhibit 3. Table 1 summarizes the results of the
laboratory analyses of the soil samples reported in the Associated Soils Analysis, Inc.,
Site Assessment Study of December 28, 1990, on file with the County.
SAMPLE LOCATION
P1-2'
P2-6'
P3-2'
P4-6'
P5-2'
P6·6'
P7·2'
P8-S'
P9-2'
P10-6'
P11-2'
P12-S'
P13-2'
P14-6'
P15-2'
P16-S'
TEST METHOD:
Minimum
Reporting Levels:
ND
TABLE 1
Summary of Laboratory Analyses
Tanks and Fuel Island Removal
November 1, 1989
(Soil in ppm)
Benzene Toluene Xylenes Ethyl-Benzene IEJ::i!gl
0.28 4.17 42.98 5.20 534.09
NO 0.38 8.51 0.84 127.88
ND NO 0.84 0.09 47.60
ND NO 0.24 NO 27.90
23.81 350.69 888.24 88.56 4550.10
58.81 588.24 1543.82 213.32 8843.63
NO NO NO NO NO
NO NO 0.72 0.05 31.52
2.40 48.95 222.26 14.10 1719.31
10.63 136.03 630.24 53.35 3491.08
NO 0.10 0.33 0.02 6.93
NO 0.03 0.16 NO NO
NO NO 0.11 NO 11.85
NO NO ND NO NO
NO NO NO NO ND
ND 0.54 2.32 0.26 65.55
TPH as gasoline by DHS LUFT Method 8015m and BTEX by EPA Method 8020
BTEX 0.03 ug/g
TPH 5.0 ug/g
Non-Detected
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The laboratory results indicated that the soil was impacted with petroleum fuel, with the
highest concentrations of petroleum constituents detected at the eastern ends of the
former tanks. Based upon these results, on March 2, 1990 the County requested a site
characterization to assess the extent of impacted soil.
Subsequent to the request, Associated Soils Analysis Inc.(ASA) advanced four soil
borings to a maximum depth of 120 feet below surface grade (bsg). Boring B-3 was
advanced in the vicinity of the former product line, believed to have originated the
release, and detected a maximum concentration of total petroleum hydrocarbons as
gasoline (TPHg) of 24,000 mg/kg at a depth of 50 feet (bsg). B-3 was terminated at a
depth of 80 feet (bsg) with TPHg concentrations of 4,700 mg/kg. Boring B-3A,
advanced ten feet to the west of B-3, detected various concentrations of TPHg ranging
between non detect to 0.62 between a depth of 90 to 120 feet (bsg). Chemical
analyses of these borings are summarized in Table 2 and reported in the Associated
Soils Analysis, Inc. Site Assessment Study of December 28, 1990, on file with the
County.
TABLE 2
Laboratory Results of Soils-Associated Soils Analysis Inc. Investigation
July 9 & 10 and November 6 and 7, 1990
ß2rin.g W1I1 Benzene Toluene Ethvlbenzene ~ IEI:i
B2 11 NO NO NO NO NO
B2 16 NO NO ND NO NO
B2 26 NO NO ND NO NO
82 36 0.013 0.028 ND 0.0178 NO
B2 51 0.29 0.49 0.030 0.179 5.2
83 11 3.1 49 13 184 1800
83 31 21 340 78 480 4200
83 51 370 2000 400 2430 24000
83 71 340 1600 350 12080 18000
83 81 44 370 97 600 4700
B3A 90 0.061 0.006 0.069 0.022 0.54
B3A 95 0.073 0.062 0.38 0.31 2.2
B3A 100 0.008 0.006 0.023 0.018 NO
83A 105 0.032 0.32 0.17 0.16 1.3
B3A 110 7.0 NO 11 NO NO
B3A 115 0.01 0.01 0.042 0.05 0.62
83A 120 0.041 0.052 0.28 0.27 2
134 75 0.078 0.009 ND 0.023 ND
84 85 0.18 0.19 0.025 0.057 0.82
84 95 0.38 0.05 0.22 0.18 2.0
84 105 0.3 0.35 0.13 0.11 1.5
84 110 NO NO ND NO NO
84 115 NO NO NO NO NO
84 120 NO NO NO NO NO
All results in milligrams per kilogram
NO = .Not .Qe1BcÐd
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The Phase I assessment work performed by ASA did not delineate the vertical limit of
hydrocarbon impacted soil beneath the probable product line release, nor was the
study able to define the lateral limits of the plume towards the north, east, or south of
the site. The County requested an additional investigation to assess the lateral and
vertical extent of impacted soil.
In August, 1991 AquaGeosciences, Inc. (AGI) advanced four borings in compliance
with the Counties request and completed the borings as vapor extraction/inlet wells.
The borings were advanced to varying depths ranging between 40 to 105 feet (bsg).
Table 3 summarizes the laboratory analyses of select soil samples collected from the
soil borings. The laboratory reporting forms are included in Appendix B.
~
Laboratory Results of Soils-AquaGeosciences Inc. Investigation
August 21 through 30, 1991
~.ri.IJs¡ ~ Benzene Toluene Ethvlbenzene ~ :œti
'11-1 25 183.750 421 .220 82.1 05 984.220 15000
'11-1 40 73.505 168.210 31.215 492.015 6625
'11-1 55 91.875 210.000 42.310 615.010 7420
'11-1 70 61.250 140.000 27.010 322.975 5105
VE-1 65 200.335 505.075 92.015 11 05.125 17220
VE-1 85 147.310 323.015 52.710 779.875 12910
VE-1 100 0.995 1.210 0.275 4.225 125
VE-1 105 ND NO NO NO ND
VE-2 35 0.335 1.010 0.105 2.220 120
VE-2 50 12.220 28.885 5.500 1 03.775 1850
VE-2 60 2.210 9.055 0.875 12.150 375
VE-2 80 NO NO NO NO 30
VE-3 10 NO NO NO 0.105 80
VE-3 15 1.115 20.210 0.725 9.990 320
VE-3 20 11.775 26.210 3.330 88.845 1250
VE-3 30 17.200 50.270 7.710 161.075 1825
All results in milligrams per kilogram
ND = Hot.Q.etec1Bd
Elevated concentrations of TPHg were encountered to a depth of approximately 100
feet (bsg) in boring VE-1. The extraction well borings were positioned within the
vicinity of highest concentrations of soil contamination and completed with 30 to 40 of
screen over intervals selected on the basis of field screening results to initiate a soil
vapor extraction remediation program. An internal combustion engine was manifolded
to the extraction wells is being used to extract and destroy the hydrocarbons contained
in the soil vapor.
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AGI recommended the installation of the additional air/vapor inlet wells to enhance the
recovery of soil vapors. On October 13 and 14, 1993, AGI advanced three borings and
completed the borings as vapor inlet wells. The findings of that work is presented
herein.
3.0 SCOPE OF WORK
In October 1993, AGI was asked to drill and install additional air/vapor inlet wells to
assist with the ongoing soil remediation program. AGl's Scope of Work for the project
follows:
*
Development of a Site Safety Plan;
*
Advance three borings and Install three (3) air/vapor inlet wells;
*
Collect soil samples for field screening and laboratory
analyses;
*
Prepare a report summarizing methods and results of the
laboratory analyses.
4.0 FIELD ACTIVITIES
Field activities included advancing three (3) testhole borings to accomplish the project
objectives. These borings were designated as VI-4, VI-5, and VI-6. Their locations are
shown on Exhibit 2, while the Boring Logs describing in detail the soils encountered
are presented in Appendix A.
The borings were advanced and completed as air/vapor inlet wells at the inferred
perimeter of soils significantly impacted with hydrocarbons based on previous drilling.
Boring VI-4 was advanced to 95 feet below surface grade (bsg) at a distance of
approximately 22.5 feet southwest from the VE-3 location. Boring VI-5 was advanced
to 40 feet (bsg) at a distance of approximately 20 feet southeast of the VE-3 location.
And boring VI-6 was advanced to 80 feet (bsg) at a distance of approximately 13 feet
east of the VI-1 location.
5.0 SOIL BORINGS
This section describes the methods used to advance, field screen, and sample the
three (3) soil borings, followed by a discussion of the analytical results.
5
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5.1 Boring Methods
The soil borings were advanced by Soils Engineering, Inc. (SEI) using a CME-75 rig
with an eight (8)-inch outer diameter hollow stem continuous flight auger in
accordance with ASTM Method 01452-80 for soil investigations and sampling by
auger borings. The augers were steam cleaned prior to drilling each boring.
Cuttings from the borings were placed on heavy gauged visquene located in the
northwest corner of the site within the fenced enclosed area to aerate.
5.2 Soil Sampling
Soil samples were collected through the auger in two and a half (2 1/2) inch diameter
brass sleeves driven in a split-spoon sampler by a 140-pound hammer with a 30-inch
drop in accordance with ASTM methods 01586-84 for split-barrel sampling of soil and
01587-83 for thin-walled tube sampling of soils. The brass sleeves and sampler were
cleaned with Alconox and rinsed in deionized water prior to each use.
Soil samples from the borings were collected at five foot intervals, beginning at 10 and
15 feet (bsg). The blow counts, recovery, and lithology were recorded on field boring
logs. The lithology was described in accordance with the Unified Soils Classification
System and ASTM procedure 02488-84 for visual description and identification of
soils under the direct supervision of a California State Registered Geologist.
The soil samples were collected using three (3) six-inch long brass sleeves installed
inside a split-spoon sampler. Upon collection, the middle sample sleeve was
immediately capped, sealed, labeled in accordance with EPA protocols, recorded on a
chain-of-custody form, and stored in an iced cooler at four degrees centigrade (4°C) or
less, pending analysis by a California State certified laboratory. The bottom and top
sample sleeves were used for lithologic description and field screening, respectively.
5.3 Field Screening of Soil Samples
The material from the top brass sleeve was placed in a mason jar to approximately 50
percent (50%) capacity, shaken, and stored for a period of 15 minutes. The top of the
mason jar was then pierced, and analyzed with a Foxboro Model 128 OV AfGC Flame-
ionizing detector (FIO). A standard headspace reading was collected at this time and
noted on the boring logs included in Appendix A. A summary of the FIO readings is
included in Table 4.
6
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:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::;::: TABLE 4 :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
.. ŠÙMMÄRYOF F1ELDSCREENING'·················································· ....
SOILS INVESTIGATION
::::::::::::::::::::::::::::::::;:::::;:::::;:::::::;:::::::::::::;:;::::§f!:~mr:::1:~:::t::}t:~::;1:~:~~::;:::::::;:::::::::::::::::::::::::;:::::;:::::::::::::::;:::::::::::::::::::::::::::::::::::::::::::::::;:::::::;::
Boring
V 1-4
Sample
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
16
1 7
18
1 9
Depth (ft)
5.5-6
10.5-11
15.5-16
20.5-21
25.5-26
30.5-31
35.5-36
40.5-41
45.5-46
50.5-51
55.5-56
60.5-61
65.5-66
70.5-71
75.5-76
80.5-81
85.5-86
90.5-91
95.5-96
FIO"
o
o
o
o
o
1 0
100
300
>1000
50
950
>1000
80
125
40
NR
90
r--s
130
Borina
VI-5
VI-6
NR = not recorded
NS = not samoled
" Results reported in parts oer million-yolumn (oomy
Samole Oeoth(ft) FID*
1 10-10.5 45
2 15-15.5 >1000
3 20-20.5 >1000
4 25-25.5 >1000
5 30-30.5 >1000
6 35-35.5 >1000
7 40-40.5 900
1 5.5-6 0
2 10.5-11 0
3 15-15.5 0
4 20-20.5 0
5 25-25.5 0
6 30-30.5 200
7 35-35.5 28
8 40-40.5 4
9 45.5-46 >1000
1 0 50.5-51 55
1 1 55.5-56 >1000
12 60.5-61 120
13 65.5-66 310
1 4 70.5-71 750
15 75.5-76 >1000
16 80.5-81 500
........................................................................................................................
:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:.:
The soil sampling and field screening procedures described above were conducted in
accordance with accepted standards of care prevalent at this time and were performed
to ensure the acquisition of accurate data. The field screening results were used in
assisting the selection of soil samples for chemical analysis.
5.4 AirNapor Inlet Well Installation
Three (3) air/vapor inlet wells were installed and constructed as shown in Exhibits 4
through 6 at the soil boring locations identified as VI-4, VI-5, and VI-6. The borings
were advanced to depths of approximately 96.5,41.5, and 81.5 feet (bsg), respectively.
The screened interval was installed between the depth interval of 50-95 feet in VI-4
(Exhibit 4), between the depth interval of 10-40 feet in VI-5 (Exhibit 5) and between the
depth interval of 30-80 feet in VI-6 (Exhibit 6). The screen consisted of 0.020-inch
factory slotted, flush threaded, two-inch Schedule 40 PVC pipe. Blank Schedule 40
PVC pipe completed the well to surface and a bottom end-cap was placed below the
screen. No glues or chemicals were used in joining the PVC pipe. The annular filter
pack consisted of Number 3/12 Monterey Sand, placed between the interval from total
depth of one to three feet above the top of the screen. One to 2.5 feet of bentonite
7
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pellets were placed above the sand to form a seal. The pellets were hydrated with
clean potable water and allowed to set. A neat cement slurry was placed on top of the
plug and extended to six inches below surface grade.
5.5 Analytical Results
Twenty (20) soil samples were analyzed by Halcyon Laboratories of Bakersfield in
accordance with State guidelines and EP A protocols. All soil samples were analyzed
for TPHg and BTEX by EPA Method 8015 and 8020/5030. Practical Quantitation
Limits were 0.1 mg/kg for TPHg and 0.005 mg/kg for BTEX. The results of the
laboratory analyses are included in Appendix B and summarized on Table 5.
:·:::U::UU..::::U:.:::.:.. TAB L E 5..::.::::,.::.,3":::::::,,
SUMMARY OF LABORATORY ANALYSIS
OF SOIL SAMPLES FROM SOILS INVESTIGATION·
r' 13 & 1 1
Borinc
VI-4
VI-5
VI-6
...........................................
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...........................................
............................... ..................
.............................. ..................
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...................... .
.......... ................. ............
Ethyl Total
Sample Depth(ft) Benzene Toluene Benzene Xylene TPH (Gas
V-4-35 36-36.5 ND ND ND NO 31
V-4-45 46-46.5 0.12 0.53 0.32 1.0 200
V-4-50 51-51.5 ND ND ND NO ND
V-4-60 61-61.5 0.78 2.0 ND 4.3 1000
V-4-65 66-66.5 ND ND ND ND ND
V-4-70 71-71.5 0.023 0.022 ND 0.021 0.7
V-4-85 86-86.5 ND ND ND NO ND
V-4-95 96-96.5 NO ND ND ND ND
V-5-1516-16.5 ND 0.33 0.74 3.9 810
V-5-20 21-21.5 NO 2.3 3.2 9.5 910
V-5-30 31-31.5 0.2 3.7 2.5 1 1 1200
V-5-40 41-41.5 NO 1 0 NO 22 5200
V-6-25 26-26.5 ND ND ND ND NO
V-6-35 36-36.5 ND ND NO ND ND
V-6-40 41-41.5 NO ND ND NO 1 .8
V-6-45 46-46.5 NO NO NO 0.01 0.5
V-6-50 51-51.5 NO NO NO NO ND
V-6-55 56-56.5 NO 0.009 NO 0.015 3.9
V-6-70 71-71.5 NO ND NO NO NO
V-6-80 81-81.5 NO NO NO ND NO
· Results reported in rng/kg (ppm)
8
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6.0 DISCUSSION OF DRILLING AND ANALYTICAL RESULTS
Boring VI-4 was advanced in the southwest quarter of the property, south of the former
tank cluster, to a depth of approximately 96.5 feet (bsg). Field screening detected no
petroleum hydrocarbons in soil to a depth of approximately 30 feet (bsg). Below a
depth of 30 feet petroleum odors and FID meter readings ranged between 10 to
greater than 1000 ppmv. The highest concentrations were generally detected
between the depths of 45 to 60 feet (bsg). Select soil samples collected from 50 to 90
feet were chemically analyzed. The chemical analysis indicated the soil was non-
detect to minimally impacted with BTEX and ranged between non-detect to 1000 ppm
for TPHg. Two consecutive non-detects occurred at 86 and 96 feet (bsg).
Boring VI-5 was advanced to a depth of 41.5 feet (bsg) southeast of the former
underground tank cluster, and dispenser island. Elevated FID readings, primarily in
excess of 1000 ppmv and strong petroleum odors were detected by field screening
between the depths of 15 to 41 feet (bsg). Four select soil samples were submitted for
chemical analysis. The laboratory results indicted BTEX ranged between non-detect
to 22 ppm and TPHg ranged between 810 to 5200 ppm, increasing with depth.
Boring VI-6, located in the northeast corner of the property, was advanced to a depth of
81.5 feet (bsg). No petroleum hydrocarbons were detected or observed in soils to a
depth of approximately 30 feet (bsg). However, petroleum hydrocarbons were
detected in varying concentrations throughout the remaining length of the boring. FID
readings ranged between 4 to greater than 1000 ppmv, varying widely with no
discernible pattern. Chemical analysis of the soil samples indicated the soil contained
primarily non-detectable concentrations of BTEX and TPHg.
Exhibits 7 and 8 graphically show profiles of the hydrocarbon plume as indicated by
the concentrations of detected TPHg constituents. A comparison of previous analytical
data from boring locations VE-1, VE-3, and VI-1, respectively, with current analytical
data from VI-4, VI-5, and VI-6 indicate hydrocarbon concentrations are markedly
reduced from former levels. As an example, the highest concentrations detected in
soil samples collected from equivalent depth ranges show a hundred-fold reduction in
benzene concentrations between VE-1 and VI-4 and between VE-3 and VI-5, and a
thousand-fold reduction between VI-1 and VI-6. On the whole, BTEX has generally
been reduced to levels of low to non-detectable concentrations. TPHg shows a ten-
fold reduction between locations VE-1 and VI-4 and a ten thousand-fold reduction
between VI-1 and VI-6. At the VI-5 location TPHg was detected in higher
concentrations than in VE-3, indicating in the southern portion of the plume these
constituents have not yet responded to the soil vapor extraction treatment.
9
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7.0 SITE GEOLOGY
The soil borings penetrated a sequence of unconsolidated sediments to a maximum
depth of 120 feet (bsg). The unconsolidated soils are Pleistocene non-marine flood-
plain fan deposits (California Division of Mines and Geology, 19641). The section
consists of alternating dense to very dense silty sands and sandy silts with
interbedded clay and poorly graded sand. The soils moisture content varied between
dry to moist, predominately slightly moist.
No free standing ground water was encountered during the October 1993 field
investigation. Published data (Kern County Water Agency, 19912 ) show that the
average depth to groundwater beneath the site approaches 200 to 250 feet (bsg) and
has a gradient to the south and southwest.
8.0 CONCLUSIONS
The maximum vertical extent of significantly impacted soil in the central portion of the
plume, based on earlier sampling, was approximately 100 feet below ground surface.
The lateral extent of the plume has been assessed to the east by VI-6 and to the west
by 8-4. The recently installed VI-5 indicates the plume extends to the south beyond
this vapor inlet well.
Laboratory analyses of soil samples collected from air/vapor inlet/extraction wells VI-4,
VI-5, and VI-6 indicate that the soil vapor extraction operation currently in operation
has significantly reduced volatile aromatic concentrations. For example,
concentrations of volatile aromatics in soil samples from VE-1 at 65 feet (drilled prior to
remediation) were benzene 200, toluene 505, ethylbenzene 92, and xylenes 1105
ppm, respectively. Concentrations of volatile aromatics in soil from VI-4 at 65 feet
resulted in non-detected concentrations for benzene, toluene, ethylbenzene, and
xylenes. Similar reductions were noted for TPH as gasoline in VI-4 and VI-6; however,
relatively high concentrations of TPHg were indicated in VI-5.
Detectable air flow (approximately .5" of H20) vacuum was measured in the newly
installed air inlet wells shortly after installation indicating that these newly installed
wells will provide the additional oxygenation of the vapor inlet stream necessary for
efficient combustion as well as providing an air sweep of the impacted plume.
Groundwater has not been encountered in any of the drilling at the site, which has
penetrated to a depth of 120 feet. Published groundwater elevation data indicates that
the depth to groundwater beneath the site is in excess of 200 feet (Kern County Water
,l;allTornla UIVISlon 01 Mines ana lòeotogy, 1964, Geologic Map of California, Bakersfield Sheet.
2 Kern County Water Agency, 1991, Water Supply Report
10
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e
Agency, Water Supply Report, 1991). The separation between groundwater and the
deepest hydrocarbon contamination is in excess of 100 feet, indicating that the
potential for contaminants impacting groundwater at this site is extremely low.
Finally, based on the recent analytical data, the vapor extraction system at the Pence
site is effectively remediating the hydrocarbon impacted soil. With the addition of the
air inlet wells, it is anticipated that the hydrocarbon removal rate will increase and that
remediation of significantly impacted soil will be complete within six (6) months.
9.0 LIMITATIONS
AGI performed this investigation in accordance with the generally accepted standards
of care which exist in Central California at this time. It should be recognized that
definition and evaluation of geologic conditions is a difficult and inexact science.
Judgments leading to conclusions and recommendations are generally made with
limited knowledge of subsurface conditions present. No warranty expressed or
implied, is made.
1 1
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EXHIBITS
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Key
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AquaGeosciences, Inc.
1701 Westwind Drive, Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax: (805)32801129
Title
Pence Petroleum
901 E. Truxtun
Bakersfield, California
SITE MAP
Exhibit
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SCALE: 1· =20'
STRE ET
"0
LEGEND
EE APPROXIMATE LOCATION OF SOIL
SAMPLES OBT AINED DURING FUEL
1"' .P2 TANK REMOV AL NOVEMBER t . 1 389
~
B2
~
B3A
APPROXIMATE LOCATION OF
TESTHOLE BOR INGS JULY 9& 10 I 1 990
APPROXIMATE LOCATION OF
TESTHOLE BOR INGS NOV. 6&7, 1990
Source: Associated Soils Analysis report 11 1 -90 ASA
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
Pence Petroleum
901 E. Truxtun
Bakersfield, California
Soil Sample Location Map
Exhibit
3
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VI A TER
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END CAP
NOT TO
SCALE
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
Title
WELL DIAGRAM
Pence Petroleum
VI-4 Completion Detail
Exhibit
4
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, 2.5'
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40'
30'
'W A TER
TABLE
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:::::::::::: == ::::::::.
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FLUSH THREADED
END CAP
NOT TO
SCALE
ÄQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
Title
WELL DIAGRAM
Pence Petroleum
VI-5 Completion Detail
Exhibit
5
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, 2.5'
2.5'~
fT
80'
50'
VI A TER
TABLE
sz.
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AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
Title
WELL DIAGRAM
Pence Petroleum
VI-6 Completion Detail
Exhibit
6
B-4
0-
Surface
VI-4
B-2 VE-1 VE-3
VI-1
VI-6
20'
I/..~i ~
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o
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40'
Exhibit
AquaGeosciences, Inc.
1701 Westwind Drive, Suite 103
Bakersfield, California 93301
I Telephone: (805) 328-0962
L-.::.X: (805) 328-1129
Title
Pence Petroleum
901 E. Truxtun
Bakersfield, California
Cross Section A-A'
7
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Surface
VE-2
VE-3
VI-S
Screened Interv
20'
40'
60'
80'
100'
TPHg Plume
Scale 1" = 1 5'
120' 0
20'
I
40'
Title
Pence Petroleum
901 E. Truxtun
Bakersfield, California
Cross Section 8-B'
Exhibit
AquaGeosciences, Inc.
1701 Westwind Drive, Suite 103
. Bakersfield, California 93301
, Telephone: (805) 328-0962
L.....:.ax: (805) 328-1129
8
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APPENDIX A
BORING LOGS
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rr
Total depth of boring:_96.5' Diameter of boring: ____6..::___ Date __.!0/!.4/9~_
Casing diameter _______1:_ Length:_50' SI' . 0.020"
ot size. _________
Screen diameter:___~" Length:__ 45' Material type: ___!V~____
Drilling company: __~~s Eng~eering, ..!~~__ Project Geologist Patrick McCullough
Method used: ______t!~low Stem A~.9~!:..._______
Signature of Registered Professional:____--.:~2>al~~_______
Registration No.: __~~~~____ State: ___~~_
DEPTH SAMPLE LOWS P.I.D. .S.C.S. DESCRIPTION
CODE
NO. Surface
-0-
-2-
-4- Sand, some silt, very fine to med.
25 0 SM coarse, It. brn., slightly moist, no
-6- odor, no stain
-8-
-10- 44 0 SM Sand, some silt, very fine to med.
coarse, It. olive/brn., moist, no odor,
-12- no stain
-14- Sand, some silt, very fine to med.
77 0 SM coarse, It. olive/brn., slightly moist,
- 16- no odor, no stain
-18-
-20- 36 0 SW /GW Sand, some gravel, med. to gravel
grade, orange/yellow, slightly moist,
-22- no odor, no stain
Key: fg3 UIIll ~ Q mil ~ [g
SW ML CL SP SM SC GP
LITHO WELL
TYPE CONS
-- .
--
Exhibit
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
Title
PENCE PETROLEUM
Bakersfield, California
BORING VI-4
DEPTH SAMPLE USCS LITHO WELL
NO. LOWS P.I.D. CODE DESCRIPTION TYPE CONST.
-24- Sand, some silt, fine to med. grade,
30 0 SM It. brn., slightly moist, no odor, no
-26- stain
-28-
Sand some silt, fine to med. grade,
-30- 47 10 SM/ML It. orange/ brn., slightly moist,
very slight sewer odor, no stain
-32- Sand, silty sand, very fine to fine
-34- 90 ML grade, orange/brn., moist, moderate
odor, no stain
34 ..~............. .......
-36- 100 SW Sand, med. to coarse, orange/grey, ................. .-.-.-.
slightly moist, moderate odor, no ................. .-.-.-.
................. .-.-.-.
-38- stain ............. .-.-.-.
............ .-.-.-.
Sand, trace gravel, med. to gravel ................. .-.-.-.
300 SW ..-.f............ .-.-.-.
-40- 72 grade, orange/grey, moist, ................. .-.-.-.
moderate odor, no stain . . . . . -.-
-42- 300 ML Silty sand, very fine to fine grade,
-44- brn., moist, odor, no stain
96 000 ML Silty sand, very fine to fine grade,
-46- + It. brn., moist, moderate to strong
odor, no stain
-48-
Sand, fine to coarse grade, It.
-50·· 50 SW orange/buff, slightly moist,
-52·· moderate petroleum odor, no stain
-54-, Silty sand, very fine to fine grade, It.
59 950 ML
-56- orange/brn., moist, moderate odor,
no stain
AquaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
Exhibit
Title
PENCE PETROLEUM
Bakersfield, California
BORING VI-4
Page 2
DEPTH SAMPLE LOW USCS DESCRIPTION LITHO WELL
NO. P.J.D. CODE TYPE CONST.
-58-
Silty sand, trace clay, orange/brn.,
-60- 42 1000 ML slightly moist, strong petroleum
+ odor, no stain
-62-
-64- Silty sand, very fine to fine grade,
99 80 ML It. brn., slightly moist, strong to
-66- moderate odor, no stain
-68
ML/CL Silty sand, some clay, very fine to
-70 45 125 fine grade, brn., moist, faint to
moderate odor, no stain
-72-
-74- Sandy silt, trace gravel, very fine
60 40 GM/ML to granular grade, red/orange,
-76- moist, faint to moderate odor, no
stain
-78-
93 ML Silt, some sand, very fine to fine
-80- grade, brn., moist, moderate odor,
no stain
-82-
-84·· Silty sand, very fine to coarse,
40 90 ML red/brn., moist, faint odor, no
-86,· stain
-88-
-90- NOT SAMPLED
Exhibit
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
Title
PENCE PETROLEUM
Bakersfield, California
BORING VI-4
Page 3
r
DEPTH SAMPLE
NO.
USCS
LOWS P.I.D. CODE
-92-
-94-
DESCRIPTION
Silty sand, some clay, very fine to
52 130 MUCL fine grade, brn., dry, very slight
odor, no stain
-96-
-98-
- 1 00-
- 102-
- 1 04-
106-
108-
110-
112-
114-
116-
118-
120··
122··
124-
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
END OF BORING @ 96.5'
LITHO WELL
TYPE CONST.
Title
PENCE PETROLEUM
Bakersfield, California
BORING VI-4
Exhibit
Page 4
r
Total depth of boring: ____~~~' Diameter of boring: ___j)~___ Date _-1QLL31~~__
Casing diameter "-_____~:._____ Length:__~___ Slot size: ___Q.:.9.?..9':__
. 2" 30'
Screen dlameter:________ Length:______ Material type: __--.f.Y_~___
Drilling company: ___ So~=- Engineering, Inc. _ Project Geologist Patrick McCullough
Methodused:__~ollo~_~~~~Aug~~_________
Signature of Registered Professional:_______--.:..:~2>~~~______
Registration No.: __~!~___ State: ___ CA__
DEPTH SAMPLE LOWS P.I.D. .S.C.S DESCRIPTION LITHO WELL
CODE TYPE
NO. Surface
-0- -- --
-- eo
eo eo
-- --
oo oo
-2- oo oo
oo oo
oo oo
oo ..
oo oo
eo eo
oo oo
-4- oo ..
oo oo
oo oo
NO SAMPLE eo oo
.. --
-- oo
-- --
-6- oo --
-- --
oo --
-- --
-8-
-10- 14 45 SM Sand, some silt, med. to very fine
grade, It. grey, moist, no odor, no stain
-12-
-14-
46 1000 SW Sand, trace silt, med. to very fine
- 16- + grade, It. brn. to grey brn., slightly
moist, strong petroleum odor, no stain
-18-
-20- 47 1000 SP Sand, med. grade, It. grey/brn.,
slightly moist, strong petroleum odor,
+
-22- no stain
Key: ~ IIID ~ B II IZ3 Œ3
SW ML CL SP SM SC GP
I AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
I Bakersfield, California 93301
I Telephone: (805) 328-0962
Fax 328-1129
Title
PENCE PETROLEUM
Bakersfield, California
Exhibit
BORING VI-S
DEPTH SAMPLE
NO.
-24-
-26-
-28-
-30-
-32-
-34-
-36-
-38-
-40-
-42-
-44-
-46-
-48-
-so··
-52-
-54-
-56-
AQuaGeosciences. Inc.
1701 Wes1twind Drive Suite 103
Bakersfield, California 93301
Telephone: (80S) 328-0962
Fax 328-1129
USCS
LOW P.I.D. CODE
54 1000 SW
+
65 1000 SW/SM
+
66 1000 SM
+
77 1000 SW
+
DESCRIPTION
Sand, trace silt, fine to coarse grade,
It. grey /brn., slightly moist, strong
petroleum odor, no stain
Sand, some silt, med. to fine grade,
orange, slightly moist, strong
petroleum odor, no stain
Sand, silt, very fine to med. grade,
orange/brn., moist, strong odor,
no stain
Sand, very coarse to med. grade,
It. grey to yellow grey, slightly
moist, strong odor, no stain
END OF BORING @ 41.5'
LITHO WELL
TYPE CONST.
Title
PENCE PETROLEUM
Bakersfield, California
BORING VI-5
Exhibit
Page 2
r
Total depth of boring: __-.?..!~5' Diameter of boring: ___§.~ Date __1 0/1]!~~
Casing diameter:_______~~______ Length:___ 30' __ Slot size: __QJ>..?.9~__
. 2" 50'
Screen dlameter:____________ Length:_____ Material type: ___~~~___
Drilling company: ___ SO.!!~É!!œ~~~i.~g.!.~~_ Project Geologist Patrick McCulloUQh
Methodused:_____Hollow~~~~~g~~___________
Signature of Registered Professional: ____!..:.90al~~____
Registration No.: ___~~~~__ State: ___~~___
DEPTH SAMPLE
NO.
-0-
-2-
-4-
-6-
-8-
-10-
-12-
-14-
-16-
-18-
-20-
-22-
LOWS P.J.D. ë~gES
DESCRIPTION
Surface
SM Sand, some silt, orange/brn., moist,
13 0 no odor, no stain
ML Silt, some clay, trace sand, buff/brn.,
dry, no odor, no stain
36 0 SM Sand, some silt, very fine to med.
grade, orange/yellow, slightly
moist, no odor, no stain
78 0 SM/SP Sand, trace silt, trace gravel, fine to
very coarse, orange/yellow, slightly
moist, no odor, no stain
88
Sand, trace silt, fine to coarse grade,
orange/yellow, slightly moist, no odor,
no stain
o
SM/SP
Key: ~ (]]]] ~ Q E r:zJ IT]
SW ML CL SP SM SC GP
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield!, California 93301
Telephone: (80S) 328-0962
Fax 328-1129
Title
PENCE PETROLEUM
Bakersfield, California
BORING VI-6
LITHO WELL
TYPE CONS
-. ......
..
..
..
..
..
..
..
--
--
--
..
--
..
..
--
..
--
..
I ¡ .;.;
..
..
..
..
eo
eo
Exhibit
r
DEPTH SAMPLE LOW USCS LITHO WELL
P.I.D. CODE DESCRIPTION
NO. TYPE CONST.
. . . . . ---
. . . . . ....
-24- Sand, med. to very coarse grade,
39 0 SP orange/yellow, slightly moist, no
-26- odor, no stain
-28- ML Silt, some sand, trace clay, very
200 fine to fine grade, grey, moist,
-30- 55 0 faint to mod. odor, slight stain
SP Sand, med. to very coarse, orange,
-32- slightly moist, very faint to no
odor, no stain
-34-
41 28 SM Sand, some silt, very coarse to fine
-36- grade, orange/It. brn., slightly
moist, faint odor, no stain
-38-
-40- 82 4 SP Sand, very coarse to fine grade, It.
grey., dry, very faint odor, no
stain
-42··
-44- Silt, some sand, med. to very fine
81 1000 SM/ML grade, It. brn., slightly moist,
-46- + strong petroleum odor, no stain
-48-
-50-· 77 55 SW Sand, med. grade, It. grey, dry,
faint to mod. odor, no stain
-52-
-54- Sand, some silt, med. to fine grade,
44 1000 SM orange to yellow orange, slightly
-56- + moist, strong petroleum odor,
slight staining
Exhibit
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (80S) 328-0962
Fax 328-1129
Title
PENCE ÆTROLEUM
Bakersfield, California
BORING VI-6
Page 2
DEPTH SAMPLE lOW USCS LITHO WEll
NO. P.I.D. CODE DESCRIPTION TYPE CONST.
-58-
-60- 38 120 Ml Sandy silt, some clay, fine to very
fine grade, It. bm., to bm., moist,
-62- faint petroleum odor, no stain
-64- Sand, trave gravel, gravel to med.
84 310 SP grade, orange/bm., slightly moist,
-66- very faint odor, no stain
-68
55 750 SM Sand, some silt, trace gravel,
-70 pebbles to fine grade, It. brn.,
moist, faint odor, no stain
-72-
-74-· Sand, some silt, coarse to fine
77 1000 SM grade, It. grey to It. brn., slightly
-76- + moist, faint to mod. odor, no stain
-78- Sand, some gravel, trace silt,
500 GM gravel grade, orange, slightly
-80- 77 moist, faint odor, no stain
500
-82- 5M Sand, some silt, fine grade,
orange, slightly moist, faint odor,
-84- no stain
-86- END OF BORING @ 81. 5'
-88-
-90-
Exhibit
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (80S) 328-0962
Fax 328-1129
Title
PENCE PETROLEUM
Bakersfield, California
BORING VI-6
Page 3
e
e
APPENDIX 8
ANALYTICAL RESULTS
AND
CHAIN OF CUSTODIES
Nevada
e
~.IJtJd, J~
Ariz
5327 Wingfoot Orive
Bakersfield, CA 93306
(805) 872-4750
Laboratory Results For
Pence Petroleum
901 East Truxtun Ave
Bakersfield, CA
Date Received : 8/23/91
Date Analyzed : 8/30/91
Analyst: J.S. Johnson
Lab No. 910122
Sample Matrix ¡Soils
Benzene
. mg/kg
Toluene
lng/kg
Ethylbenzene
lag/kg
Xylenes
lag/kg
Tot Pet Hyds
mg/kg
VI-1@25 I. 183.750 421.220 82.105 984.220 1S,000
VI-1940' 73.505 168.210 31.215 492.015 6,625
VI-1(i55' 91.875 210.000 42.310 615.010 7,420
VI-l@70' 61.250 140.000 27.010 322.975 5,105
V.E-1@65 ' 200.335 505.075 92.015 1105.125 17,220
VE-l@85' 147.310 323.015 52.710 779.875 12,910
VE-l~lOO' .995 1.210 .275 4.225 125
VE-1@105' N'D ND ND N'D 30
All Results Reported in Milli~rams per Kilogram
ND = Non Detectable i EPA 8020 (.005 mg/~g)
EPA 8015 Modified for Gasoline (5 lag/kg)
Analysis of volatile Aromatics i EPA 8020
-Analysis of Total Petroleum Hydrocarbons; EPA 8015 MOdified for Gasoline
*The. TPH Method for Gasoline is the Calif DOMS Recommended Procedure
Certificate Number
E739
tØ·d
6e: 'tt8e:Z
Certified Full Service On Site Analyticsllaboratories
01 ·JNl Sa:\::!l 3lIa:OW WOd.:! 80: H t66't-8't-d3S
e
~..fpJ¿ !J~
Arizor
Nevaaa
5327 Wlngfoot Drive
Bakersfield. CA 93306
(805) 872-4750
LaÞoratory Results For
Penoe Petroleum
901 Bast Truxtun Ave
Ba]cerstield, CA
Date Received : 9/1/91
Date Analyzed : 9/9/91
Analyst : J.s. Johnson
Lab No. 910130
Sample Matrix ; Soils
Ben~ene
. mg /kg
Toluene
mg/kg
Ethylbenzene
mg/kg
Xylenes
mg/kq
Tot Pet Hyds
mg/kg
VE-2~351 .335 1.010 .105 2.220 120
VE-2@50' 12.220 28.885 5.500 103.775 1850
VE.,2@60 I 2.210 9.055 .875 12.150 375
VB-2~80' ND ND ND ND 30
VE-3~10' ND ND ND .105 80
VE-3@15" 1.115 20.210 .725 9.990 320
VE-3@20' 11.775 26.210 3.330 88.~45 1250
VE-3@30' 17.200 50.270 7.710 161.075 1825
All Results Reported in Milligrams per Kilogram
ND ~ Non Detectable; BPA 8020 (.005 mg/kg)
EFA 8015 Modified for Gasoline (5 mg/kg)
Analysis of Volatile Aromatics j EFA 8020
*Analysis of total Petroleum Hydrocarbons ; BFA 8015 Modified for Gasoline
*The TPH Method for Gasoline is the Calif DOHS Recommended Procedure
Certificate Number
E739
~.o
Z0'd
6ZHSZ£
Certified Full Service On-Site Analytical Laboratories
01 . Jt'1l Se~l 3l I eow ¡" Oèf~ 60 : tt t 66 t -8 t -d3S
PRO~. NO
.iOJECT NAME
PeNce .-
. LP NO
\PO NO}
SAMPl E RS IS'!lI\,'I'HeiNulOher¡
9 ò / E. 77: tI x7-C1I,.J
dfqua ~!:~::~~'- "'~'::"oIf!~:,·
LM5 1#c .
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Ph; Ii' n
DA TE SAMPLE 10 /
TIME
MM/DDiYY HH MM S5
NO. Sample
OF T yp.
50\1
CON· 151
T AIN· Water
ERS ¡WI
Sludge
1591
C/J/9L~' /Al
SAMPU, I [)
REMARKS
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Dale/Time Re~eived by: ISignelu'.'
1);11-~'ttll '1'. ;,M"
I d.'r'
Rema.ks
Send Results To P ~. I: 0 r,,, I LIAJ J"J
Allenllon of J I 11t,;
AQUAGEOSCIENCES I
t 701 WeSlwlC\d Or.. SUlle 101
Bake,slleld. Cali forma 93301
Received by: ¡Signelure)
D"r 'tlPE:'·" ;ì¿J!o / / y~
Wh"e 5."'",., if 'Y () CanalY Relu'fI Copy To Shlppel
PH\k l dO CP I~
(~I.·IIII.h"'I!o·1 ;'. ¡.'II!,<I· ,,,,,,'111,'111,\1 (·"I"U\r""t.
PRO~. NO. i\OJECT NAME
:~'J-6i \ ? ? {.·\.x-O \ tv tI'- L4'S ~ G
\ eV\ve- NO. Sample
lP. NO. SAMPLERS IS,ynalureINurnl>en OF Type
(PO NO) 'p '-'<I \ ~:> h OALw I~ Soil ~
CON· tSI .J...'"
"
T JAIN· Waler ~..,
DATE SAMPLE /0 SAMPLE 10 ERS (W) ..,
TIME /Á~ REMARKS
Sludge
MMiDD¡YY HH MM 55 (591
g J t- ') It'll 'I'. ;}l> AM V~··2: @ .'- - I J ~ ¡/ V
s
:.;
~ 111 11 I V : 0 c;- At1 \1 r3 - 1... ~ I vi V
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- u.o ..~ / ~/.;;'1'q~ ,,: 'sA -ß- Allenl,on of \
R.... ,
AQUAGEOSCIENCES
Rellnquishea \y:IISilln.ture, Deter me Received by: (Sill".lu'.1 1701 Weslw,nd Or.. Su,le 101
BakerSfield. Galllorn,a 93301
:
Relinquished by: ¡Sign'lu,e) D.I.elTime ~;';~~'J r/'t
-14- -/.-- eI}*,~]"wp
WhIle 5ðfr·,pl(>! VG Cana,.,. R91utn COpy To ShlPDel P,f)k Lao COllI-
íl &í£.O~Ci.E· "£.1, [Inc.
o-rqua-
e
11111 III/I!
¡¡¡¡¡W'· . 't I1ffll!
I·-l-\..lCY~C)~
ìlLabDratofifs í/
Certified by the Stare of co".a Departmellt of Health Ser\i1ces
LabU'"at1VI'"'" # JI':}'2()
1701 Westwlnd Dr. Suite 103
Bakersfield, C..-\. 93301
Phone: 805-328-0962. Fax: 805-328-1129
,Iíl 11111i.
Report o' Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-4-35
Matrix: Soil
Analyst: MCM
Lab #: 93A286
Date of sampling: Oct 14, 1993
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units PQL*
Benzene ND mgIKg (ppm) 0.05
Toluene ND mg/Kg (ppm) 0.05
Ethylbenzene ND mglKg (ppm) 0.05
X lenes ND m m 0.05
TPH gasoline 31. mgIKg (ppm) 1.
TPH diesel ND m m 1.
*PQL = Practical Quantitation Limit
/' /~- .
~ .~ ...------~----:
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
e
Certified by the State of CalifOrnia Deoortment of Health SeNlces
LabuilU>o- # I<:J~
'11I1111111h
IIIJIIJI"." .1,'.. - 7 ··"'~I I'I
. lL,\lCl C)~
,,7La lJ 0 rat 0 rl £13',/1
1701 Westwhld Dr. Suite 103
Bake.~field. (',-\ 93301
P110ne: ,'305-328-0062. Fa,: 1305·328·1129
,Ii IIIII~ Illh¡,
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -4-45
Matrix: Soil
Analyst: MCM
Lab #: 93A287
Date of sampling: Oct 14, 1993
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units L*
Benzene 0.12 mgIKg (ppm) 0.02
Toluene 0.53 mg/Kg (ppm) 0.02
Ethylbenzene 0.32 mgIKg (ppm) 0.02
X lenes 1.0 m m 0.02
TPH gasoline 200. mg/Kg (ppm) .5
TPH diesel ND m m .5
*PQL = Practical Quantitation Limit
~~~,
Rafael Espinosa LeniZ, Ph.D.
Laboratory Director.
e
e
Certlnød by the State of California Deportment of Health 5ef'lices
LðIKiI''éItu'Y # .~~
¡llIlllllllh
II I I':·~-- T (~ '. ;--'~IIIII
11._ \...... ,,~. 1: 0.,. .
11][,1 U 0 r ato rt £S'.,
1101 Westft'b.d Dr. Sult.e 10:1
Bakersfield!" <'.-\. !}330J
Phone: 805-3:2.'3-0962. Fa....: 805·328·1129
,lllllllllllh_,
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfiel<L CA 93301
Contact person: Patrick MCCullough
Sample: V-4-50
Matrix: Soil
Analyst: MCM
Lab #: 93A288
Date of sampling: Oct 14, 1993
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units L*
Benzene ND mWJ{g (ppm) 0.005
Toluene ND mg/Kg (ppm) 0.005
Ethylbenzene ND mWJ{g (ppm) 0.005
X lenes ND m m 0.005
TPH gasoline ND mg/Kg (ppm) .1
TPH diesel ND m m .1
*PQL = Practical Quantitation Limit
d:::-'/:/::/' .
/~ /' - ~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
e
1Illlltltf!
1IIIIil!ì~;'·_:. ,~. "II~ III
pI Il\lC): O~
III 1f ·1 h Ù t+ ;:'J t 0 r+ t' ~ ..' "
I ), ......'i'. ;.,¡ u. {..,5,
e
CertiAed by the State of Colifornlo Deoartmeilt of Health Serv1Ces
iLðb«'"ðt«y # I'J'2()
1701 Westwlnd Dr. Suite 103
Bakersfield, C.L~ 93301
Phone: 805-328-0962, Fax: 805-328-1129
,1111 111111i.
Report o' Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -4-60
Matrix: Soil
Analyst: MCM
Lab #: 93A289
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report: Oct 28, 1993
Com und Concentration Units L*
Benzene .78 mgfKg (ppm) 0.05
Toluene 2.0 mWJ<.g (ppm) 0.05
Ethylbenzene ND mgfKg (ppm) 0.05
X lenes 4.3 m m 0.05
TPH gasoline 1000. mgIKg (ppm) 1.
TPH diesel ND m m 1.
*PQL = Practical Quantitation Limit
1 ~'~'
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Rafael Espinosa LeÍ1iz, Ph.D.
Laboratory Director.
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1701 Westwlnd Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-328-ü962, Fax: 805-328-1129
Report o' AnalysIs
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -4-65
Matrix: Soil
Analyst: MCM
Lab #: 93A290
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report: Oct 28, 1993
Com ouod Concentration Units L*
Benzene ND mg/Kg (ppm) 0.005
Toluene ND mglKg (ppm) 0.005
Ethylbenzene ND mglKg (ppm) 0.005
X lenes ND m m 0.005
TPH gasoline ND mg/Kg (ppm) .1
TPH diesel ND m .1
*PQL = Practical Quantitation Limit
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Rafael Espinosa Leniz, Ph.D.
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1701 Westwlnd Dr. Suite 103
Bakersfleld~ Ci\. 93301
Phone: 805-328-0962, Fax: 805·328-1129
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Report 01 Analysis
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -4-70
Matrix: Soil
Analyst: MCM
Lab #: 93A291
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report: Oct 28, 1993
Com und
Concentration
Units
L*
Benzene
Toluene
Ethylbenzene
X lenes
.023
.022
ND
.021
mgIKg (ppm)
mg/Kg (ppm)
mgIKg (ppm)
0.005
0.005
0.005
0.005
TPH gasoline .7
TPH diesel ND
*PQL = Practical Quantitation Limit
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Rafael Espinosa LetÍiz, Ph.D.
Laboratory Director.
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1701 Westwlnd Dr. Suite 103
Bakersfield, ~i\. 93301
Phone: 805-328-0962, Fax: 805-328-1129
IIIII
Report 01 AnGlvsls
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -4-85
Matrix: Soil
Analyst: MCM
Lab #: 93A292
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report: Oct 28, 1993
Com ouod Concentration Units L*
Benzene ND mglKg (ppm) 0.005
Toluene ND mg/Kg (ppm) 0.005
Ethylbenzene ND mgIKg (ppm) 0.005
X Jenes ND m 0.005
TPH gasoline ND mgIKg (ppm) .1
TPH diesel ND m m .1
*PQL = Practical Quantitation Limit
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Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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iLabu-at«" # 1'}:2()
1701 Westwind Dr. Suite 103
Bakersfield!! CA 93301
Phone: 805·328-0962. Fax: 805·328·1129
Report o' Analysis
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfiel<L CA 93301
Contact person: Patrick MCCullough
Sample: V -4-95
Matrix: Soil
Analyst: MCM
Lab #: 93A293
Date of sampling: Oct 14, 1993
Date of analysis: Oct 21, 1993
Date of Report: Oct 28, 1993
Com ound
Concentration
Units
L*
Benzene
Toluene
Ethylbenzene
X lenes
ND
ND
ND
ND
mWKg (ppm)
mg/Kg (ppm)
mWKg (ppm)
m m
0.005
0.005
0.005
0.005
TPH gasoline ND
TPH diesel ND
*PQL = Practical Quantitation Limit
.1
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iLabu"ðt«y # ~Ç)~
1701 Westwlnd Dr. Suite 103
Bak~rsfield, <::A 93301
Phone: 805-328-0962, Fax: 805-328-1129
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Report 01 AnGlysls
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-5-15
Matrix: Soil
Analyst: MCM
Lab #: 93A282
Date of sampling: Oct 13, 1993 @ 15 :00 pm.
Date of analysis: Oct 18, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mgIKg (ppm) 0.05
Toluene 0.33 mgIKg (ppm) 0.05
Ethylbenzene 0.74 mgIKg (ppm) 0.05
X lenes 3.9 m m 0.05
TPH gasoline 810. mgIKg (ppm) 1.
TPH diesel ND m m 1.
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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1701 Westwlnd Dr. Suite 103
Bakersfield, (;A 93301
Phone: 805-328-0962, Fax: 805-328-1129
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Report o' AnalysIs
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfiel~ CA 93301
Contact person: Patrick MCCullough
Sample: V -5-20
Matrix: Soil
Analyst: MCM
Lab #: 93A283
Date of sampling: Oct 13, 1993 @ 15:09 pm.
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mg/Kg (ppm) 0.2
Toluene 2.3 mg/Kg (ppm) 0.2
Ethylbenzene 3.2 mg/Kg (ppm) 0.2
X lenes 9.5 m m 0.2
TPH gasoline 910. mg/Kg (ppm) 1.
TPH diesel ND m m l.
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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l.alba"ðtu"y # j<)'2()
1701 Westwlnd Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-328-0962, Fax: 805-328-1129
,illll Illhi
Report o' Ancalysls
Test: 8015m/8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 9330 I
Contact person: Patrick MCCullough
Sample: V -5-30
Matrix: Soil
Analyst: MCM
Lab #: 93A284
Date of sampling: Oct 13, 1993
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com und Concentration Units PQL*
Benzene 0.2 mg/Kg (ppm) 0.2
Toluene 3.7 mWJ<.g (ppm) 0.2
Ethylbenzene 2.5 mg/Kg (ppm) 0.2
X lenes 11. m m 0.2
TPH gasoline 1200. mg/Kg (ppm) 1.
TPH diesel ND m m 1.
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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1701 Westwtnd Dr. Suite 103
Bak@rsfield, t;A 93301
Phone: 805-328-0962, Fax: 805-328-1129
I III
Report o' Rftcalysls
Test: 8015mJ8020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-5-40
Matrix: Soil
Analyst: MCM
Lab #: 93A285
Date of sampling: Oct 13, 1993
Date of analysis: Oct 19, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mglKg (ppm) 0.2
Toluene 10. mglKg (ppm) 0.2
Ethylbenzene ND mglKg (ppm) 0.2
X lenes 22. m m 0.2
TPH gasoline 5200. 1.
TPH diesel ND m 1.
*PQL = Practical Quantitation Limit
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Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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löOOr-ötu",.' # N)'1()
1701 Westwilld Dr. Suite 103
Balu~rsfield, C"~ 93301
Phone: 805-328-0962, Fa....: 805-328-1129
, 1111111111i.
Report 01 Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-6-25
Matrix: Soil
Analyst: MCM
Lab #: 93A274
Date of sampling: Oct 13, 1993 @ 09:40 am.
Date of analysis: Oct 15, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mgIKg (ppm) 0.005
Toluene ND mgIKg (ppm) 0.005
Ethylbenzene ND mgIKg (ppm) 0.005
X lenes ND m m 0.005
TPH gasoline ND mg/Kg (ppm) 0.1
TPH diesel ND m m 0.1
*PQL = Practical Quantitation Limit
.~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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laìÞ«ëlt«;¡n' # N~()
1701 Westwind Dr. Suite 103
Bakersfield, C"'" 93301
Phone: 805-328-0002, Fax: 805-328-1129
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Report o' Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V-6..35
Matrix: Soil
Analyst: MCM
Lab #: 93A275
Date of sampling: Oct 13, 1993 @ 10:03 am.
Date of analysis: Oct 15, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mgIKg (ppm) 0.005
Toluene ND mglKg (ppm) 0.005
Ethylbenzene ND mgIKg (ppm) 0.005
X lenes ND m m 0.005
TPH gasoline ND mglKg (ppm) 0.1
TPH diesel ND m m 0.1
*PQL = Practical Quantitation Limit
~-~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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1701 Westwand Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-328-0962. Fax: 805-328-Il29
, 11111111111 lilt.
Report o' Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfiel<L CA 93301
Contact person: Patrick MCCullough
Sample: V -6-40
Matrix: Soil
Analyst: MCM
Lab #: 93A276
Date of sampling: Oct 13, 1993 @ 10:21 am.
Date of analysis: Oct 15, 1993
Date of Report: Oct 19, 1993
Com ound
Concentration
Units
L*
0.005
0.005
0.005
0.005
Benzene
Toluene
Ethylbenzene
X lenes
ND
ND
ND
ND
mgIKg (ppm)
mgIKg (ppm)
mgIKg (ppm)
TPH gasoline 1.8
TPH diesel ND
*PQL = Practical Quantitation Limit
0.1
0.1
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Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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1701 Westwind Dr. Suite 103
Bakersfield, Ci\. 93301
Phone: 805-328-0ÇI62, Fax: 805-328-1129
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Report CÞ' Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 WestwindDr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -6-45
Matrix: Soil
Analyst: MCM
Lab #: 93A277
Date of sampling: Oct 13, 1993 @ 10:37 am.
Date of analysis: Oct 15, 1993
Date of Report: Oct 19, 1993
Com und
Concentration
Units
L*
Benzene
Toluene
Ethylbenzene
X lenes
ND
ND
ND
0.010
mg/Kg (ppm)
mg/Kg (ppm)
mg/Kg (ppm)
m K m
0.005
0.005
0.005
0.005
TPH gasoline 0.5
TPH diesel ND
*PQL = Practical Quantitation Limit
0.1
0.1
~0
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
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1701 Westwlnd Dr. Suite 103
Bakersfield, CA 93301
Phone: 805-328-0962, Fax: 805-328-1129
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Report o' Analysis
Test: 8015m18020/5030 Total Petroleum Hydrocarbons
and BTEX's by Purge and Trap
Company: Aquageosciences
1701 Westwind Dr. Suite 101
Bakersfield, CA 93301
Contact person: Patrick MCCullough
Sample: V -6-80
Matrix: Soil
Analyst: MCM
Lab #: 93A281
Date of sampling: Oct 13, 1993 @ 13:00 pm.
Date of analysis: Oct 18, 1993
Date of Report: Oct 19, 1993
Com ound Concentration Units L*
Benzene ND mgIKg (ppm) 0.005
Toluene ND mgIKg (ppm) 0.005
Ethylbenzene ND mgIKg (ppm) 0.005
X lenes ND m m 0.005
TPH gasoline ND mg/Kg (ppm) 0.1
TPH diesel ND m 0.1
*PQL = Practical Quantitation Limit
~~
Rafael Espinosa Leniz, Ph.D.
Laboratory Director.
.. . _ ._.~___ ~ '__~_M_'_'_'_·_·-
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/I". i""II.\" \'í""//ldqlt'lldt'll/ 'It's/i/lg 1.11"",,,,,...\,. LSJ"I>/ís/¡..d 1'10-1 ANAL YSIS REQUEST
7X I 1'.'1 Wa,hinglon lIon!cv;mJ · Lo> Angeles, California '10021 · (213) 749-3411 · Fax: (213) 745-6372 DATE: PAGE OF
1'0. II", KK055\1, IIlIutds I'oim Shipyard IIldg. 114 · San Fr.ncisw, California 'H I XX · (4IS) 330-3000 · !'ax: (4IS) !l22-SSM
5427 Ea.,1 La I'alllla A ve/llle · Anaheim, California 92¡¡07 · (7 4) 693- 1026 · Fax:(714)693-1034 FILE NO. LAB NO.
CLIENT NAME: .R~i /Jc= __ c c: ANAL YSES REQUESTED: REMARKS:
PROJECT NAME: ,.P~., C ~ ?c. /y, let.ñ, PROJECT NO. P.O.NO,
ADDRESS:
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PROJECT MANAGER: ?c.¡ /1 (( (..Ii.." ( PHONE II: J 2.. (/- 0") (. L FAX II: -I
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SAMPLER NAME: ¡:J. - . Æ /1 ((t.\pr/¿r- ':J ¿ 0
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TAT (Analytical Turn Around Time) o ~ Same Day; 1 ~ 24 Hour; 2 ~ 48 Hour; (Etc,) ~
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CO NT AINER TYPES: B ~ Brass, G ~ Glass, P ~ Plastic, V "' Voa Vial, 0 = Other: LO co ~
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C> ~ SAMPLE CONDITION!
SAMPLE DATE TIME MATRIX CONTAINER <0 "<t'
NO. SAMPLED SAMPLED SAMPLE DESCRIPTION TAT COMMENTS:
WATER SOIL SLUOGE OTHER . TYPE
V- j-JI) /O/O/IJ / .JJu 7-3A- L ~ Ý ./' ! /J ../ /'
V -r-~; Jo //J/~ J I J J-j- i J II LPJ /" I j) /' /"
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1, Samples returned to client? YES
RelonqUlshed By: ¡Slgnalure and Pni'led )t.frne¡ ReceIVed By: ¡Signalure and Prinled Name)/ Dale: Tìme:
2. Samples will not be stored over 30 days, unless
RelonYUlshed By: (Signal"''' .nd Prinled Nam"l Received By: ISlgnalU/e and Printed Name) Dale: Time: additional storage time is requested.
3, Storage time requested: m_. _ _ ..______._.....__ days
SPECIAL INSTRUCTIONS:
By ______~_ m_n___ Date
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Groundwater Scientists · Environmental Consultants
.
Workplan for Additional Air/Vapor Inlet Wells
901 E. Truxtun Avenue
Bakersfield, California
Presented To:
Mr. Robb Pence
Presented By:
AquaGeosciences, Inc.
September, 1993
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Philip Go~lwln R.G. # 4779
Principal Hydrogeologist
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1701 Westwind Drive, Suite 101 · Bakersfield, California 93301
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Table of Contents
1.0 Introduction
1 .1 Purpose
1 .2 Scope of Services
1 .3 Schedule
2.0 Background
2.1 Facility Description
2.2 Project History
3.0 Workplan
3.1 AirNapor Inlet Well Depths and Locations
3.2 Boring Methods
3.3 Soil Sampling
3.4 Field Screening
3.5 Soil Analyses
3.6 Installation of Air/Vapor Inlet Wells
4.0 Quality Assurance Plan
4.1 Sample Collection and Handling Protocol
4.2 Sample Identification and Chain of Custody
Protocol
4.3 Analytical Quality Assurance
5.0 ReporL of Findings
6.0 Site Safety Plan
Exhibit 1
Exhibit 2
Exhibit 3
Exhibit 4
Location Map
Site Map
Cross Section A-A'
Well Diagram
Appendix A
Site Safety Plan
.
Page
1
1
1
1
1
2
2
2
3
3
3
4
4
4
5
5
5
6
6
6
e
e
1.0 INTRODUCTION
Pence Petroleum has authorized AquaGeosciences, Inc. to prepare this
workplan for additional soil Air/vapor inlet wells at at 901 E. Truxtun
Avenue, Bakersfield, California.
1.1 PURPOSE
The scope of work described in this workplan has the following
objectives:
* Drilling and installing air/vapor inlet wells for the removal of
volatile fuel hydrocarbons from the soil using a vapor extraction system.
1.2 SCOPE OF SERVICES
The scope of services described in this workplan include:
*
Development of a Site Safety Plan;
*
Installation of three (3) air/vapor inlet wells;
*
Collecting soil samples for laboratory analyses;
*
Preparing a report summarizing methods and results of the
soil remediation.
1.3 SCHEDULE_
AquaGeosciences, Inc. anticipates beginning work described in this
workplan within one week pending approval from the Kern County
Environmental Health Service Department, and authorization to proceed
from Pence Petroleum.
2.0 BACKGROUND
The site is located at 901 E. Truxtun Avenue, Bakersfield, California as
shDwn on Exhibit 1.
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2.1 FACILITY DESCRIPTION
The property is currently unoccupied and was formerly operated as Pence
Automated Fuels by the Pence Petroleum Company. Prior to 1986, the site
was owned by Davies Oil, Bakersfield, California, and was used as an
automated card lock fueling station.
2.2 PROJECT HISTORY
On November 1, 1989, two (2) 6,000 gallon underground gasoline storage
tanks, one (1) 10,000 gallon underground gasoline storage tank, one
dispenser island and associated product lines were removed from Pence
Petroleum's Automated Fuels Cardlock at 901 E. Truxtun Avenue,
Bakersfield, California. Soil Samples collected at that time indicated
that the soil had been impacted with gasoline, and that a site
characterization study would be required.
Subsequently, Associated Soils Analysis advanced four soil borings to a
maximum depth of 120 feet below surface grade. Boring B-3 advanced
through the location along the product line where the release is believed
to have originated, detected gasoline at 24,000 mg/kg at 50 feet below
surface grade. That boring was terminated at 80 feet below surface grade
with gasoline at 4,700 mg/kg. Boring B-3A advanced ten feet to the west
detected gasoline at 0.54 mg/kg at 90 feet below surface grade, and had
indications of continued low levels of impaction to 120 feet below
surface grade.
This previous Phase I assessment work did not delineate the vertical limit
of gasoline beneath the probable product line release, nor the lateral
limits of the plume to the. north, east, or south. The County required that
additional testhole borings be advanced to further assess the lateral and
vertical extent of contamination. This was done as part of the initial
stages of the remediation. Borings were advanced to complete this
assessment, and then be completed as vapor extraction/inlet wells.
aJ) WORKPLAN
AquaGeosciences, Inc. proposes to install three (3) additional air/vapor
inlet wells for the purpose of assisting in remediating the gasoline
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impacted soil at 901 East Truxtun Avenue.
3.1 AIRN APOR INLET WELL DEPTHS AND LOCATIONS
Exhibit 2 shows the existing locations of the vapor extraction wells, as
well as, the proposed locati~ns of the additional inlet wells designated as
VI-4, VI-5 and VI-6. The locations, depths, and screened intervals have
been selected to provide lateral and vertical coverage of the impacted
plume as interpreted from prior assessment information as shown on
Exhibit 3. The proposed wells will be drilled and completed to depths of
105, 40, and 80 feet, respectively, below the ground surface.
3.2 BORING METHODS
The borings will be advanced using a CME-75 rig, or equivalent, equipped
with 8-inch or larger hollow stem continuous flight auger in accordance
with ASTM Method D 1452-80 for soil investigations and sampling by
auger borings. The auger flights and hammer will be steam cleaned prior
to drilling each boring.
The lithology and other pertinent data will be recorded on a field boring
log in accordance with ASTM Method D 2488-84 for visual description and
identification of soils. Borings will be logged by or under direct
supervision of a California Registered Geologist and/or Civil Engineer.
Cuttings and other soil spoil from the borings will be placed on visquene
and allowed to aerate on site.
3.3 SOIL SAMPLING
Soil samples will be collected through the auger in 2-inch brass sleeves
driven in a split spoon sampler by a 140 pound hammer with a 30-inch
drop in accordance with ASTM Methods D1586-84 for split-barrel
sampling of soil and D1587-83 for thin walled tube sampling of soils. The
brass sleeves and sampler will be steam cleaned prior to each use.
Soil samples will be driven at five foot intervals. The blow counts,
recovery, and lithology will be recorded on field logs. Lithology will be
described in accordance with the Unified Soil Classification System. One
brass sleeve with soil from each interval will be capped, sealed, and
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labeled in accordance with EPA protocols, recorded on a Chain-of-Custody
form, placed in a cooler at 4 degrees centigrade or less, and transported
to a California Certified laboratory with the Chain-of-Custody for the
specified analyses. Selected samples will be analyzed and the other
samples will be held no more than fourteen days for further analyses if
necessary.
3.4 FIELD SCREENING
Soil samples will be collected using three six-inch brass tubes installed
inside a splitspoon sampler. The middle sample tube will be immediately
capped with a teflon liner separating the soil from the lid, and stored in
an iced cooler upon collection. The bottom tube will be used for lithologic
description, and the top tube will be used for field screening. The
material from the top tube will be placed in a mason jar to approximately
50 percent capacity, shaken, and stored for a period of 15 minutes. A
standard headspace reading will be collected at this time and noted on the
boring log.
3.5 SOIL ANALYSES
Approximately twenty (20) soil samples will be analyzed by Halcyon
Laboratories, a California State certified laboratory in accordance with
State guidelines and EPA protocols. The exact number of samples to be
analyzed will be determined in the field after carefully reviewing field
screening data. The samples will be analyzed for total petroleum
hydrocarbons as gasoline (TPHg), benzene, toluene, xylene, and
ethylbenzene (BTXE) using the O.O.H.S. L.U.F.T. Method and EPA Method 8020,
respectively.
3.6 INSTALLATION OF AIRNAPOR INLET WELLS
The air/vapor inlet wells are to be completed as shown on Exhibit 4. The
well casing will consist of Schedule 40, factory slotted (0.020 inch), 2-
inch diameter (1.0.) hydrolock flush threaded PVC pipe. A flush threaded
bottom cap will be provided. The slotted section will extend across the
contaminated areas as shown in Exhibit 3. In VI-4 the slotted section will
extend between the depth interval of 60 to 105 feet below the ground
surface (bsg). In VI-5 the slotted section will extend between the depth
interval of 10 to 40 feet (bsg). And in VI-6 the slotted section will
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extend between 20 to 80 feet (bsg). Blank 2-inch Schedule 40 PVC casing
will complete each well to the surface. The annular space adjacent to the
screened interval will be backfilled with a sand filter pack, placed from
total depth to 3 feet above slotted interval. One foot of bentonite pellets
will be poured above the sand to form a seal. Cement grout will extend
from the bentonite seal to the surface.
4.0 QUALITY ASSURANCE PLAN
This section describes field and analytical quality-assurance procedures
to be followed during the remediation.
4.1 SAMPLE COLLECTION AND HANDLING PROTOCOL
Proper sample collection and handling are essential to assure quality of
data obtained from a sample. Each sample, therefore, will be collected in
a brass tube, preserved correctly for the intended analysis and stored for
no longer than the permissible holding time prior to analysis. Protocol to
be applied in this project is described in Section 3.3.
4.2 SAMPLE IDENTIFICATION AND CHAIN OF CUSTODY PROTOCOL
Sample identification and Chain of Custody procedures are designed to
assure sample quality and to document sample possession from the time it
is collected to the time of its ultimate disposal. The container for each
sample submitted for analysis will have a label affixed with the
identifying number or the number will be inscribed directly on the
container if feasible. The analytical laboratory will assign a separate
sample number unique to that sample for internal sample coordination and
identification. A description of the sample, including the sample number
and other pertinent information regarding its collection and/or geologic
significance will be written in field notes and/or a geologic boring log
prepared by the site geologist. These field documents will be kept in a
permanent project file. All samples will be analyzed by a State certified
laboratory for the analyses requested.
A properly completed Chain of Custody document will be submitted to the
analytical laboratory along with the sample. The laboratory's assigned
number will be properly entered on the form. A quality control officer at
thE~ laboratory will verify integrity of samples submitted, proper sample
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volume, correctness of containers used and properly executed Chain of
Custody document. Pertinent information will be entered into a log book
kept by the laboratory.
4.3 ANALYTICAL QUALITY ASSURANCE
In addition to routine calibration of analytical instruments with standards
and blanks, the analyst is required to run duplicates and spikes on 10
percent of analyses to assure an added measure of reliability and
precision. Accuracy is verified through the following:
1.) U.S. EPA and State certification of results;
2.) Participation in inter-laboratory round robin programs;
3.) "Blind" samples are submitted for analysis by the quality
control officer on a weekly basis. These are prepared from National
Bureau of Standards specifications of EPA reference standards;
4.) Verification of results with an alternative method.
5.0 REPORT OF FINDINGS
A report of findings will be prepared which will detail field activities,
analytical results, discussion of analytical results, conclusions and
recommendations. The report of findings will recommend what further
action, if necessary, will be required. If additional work is warranted, the
scope of the additional work will be specified in the report. The report of
findings will be certified by a California Registered Geologist.
6.0 SITE SAFETY PLAN
Appendix A contains a Site Safety Plan which complies with the Worker
Right to Know Regulations and CAC Title 26.
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AquaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield" California 93301
Telephone: (805) 328-0962
Fax 328-11 29
Title
Pence Petroleum
Bakersfield California
Exhibit
1
VICINITY MAP
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Estimated Portion of Plume
Requiring Remediation
Former Gasoline
Tanks and
Dispenser Island
manhole
o
East Truxtun
- --
.
streetlight
?
parking lot
?
- --
East 18th
SCALE 1" = 20'
. Prior Boring Location
o Vapor Extraction/Inlet well
o Proposed inlet wells
AquaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-"29
Title
Pence Petroleum
901 E. T ruxtun
Bakersfield, California
SITE MAP
Exhibit
2
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VI-6
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60-1 OS
1 0-40
20-80
SCALE: VERTICAL 1" :: 20'
HORIZONTAL 1":: 20'
EXHIBIT 3
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VI-4; 105'
VI-5; 40'
VI-6; 80'
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VI-4; 60-105'
VI-5; 10-40'
VI-6; 20-80'
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NEAT CEMENT
GROUT
BENTONITE
SEAL
MONTEREY SAND
OR EQUIVALENT
3/12
FLUSH THREADED 2-INCH
DIA. PVC SCREEN
SLOT SIZE 0.020 "
FLUSH THREADED
END CAP
NOT TO
SCALE
AquaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
Title
WELL DIAGRAM
Pence Petroleum
901 E. Truxtun
Bakersfield, California
Exhibit
4
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APPENDIX A
SITE SAFETY PLAN
INTRODUCTION:
A Site Safety Plan (SSP) has been designed to address safety provisions
needed during the site soil remediation. Its purpose· is to provide
established procedures to protect all on-site personnel from direct skin
contact, inhalation, or ingestion of potentially hazardous materials that
may be encountered at the site. The SSP establishes personnel
responsibilities, personal protective equipment standards
decontamination procedures, and emergency action plans.
AquaGeosciences, Inc. seeks to enter the property described for the
purpose of drilling and completing three (3) additional air/vapor inlet
wells.
Soil samples will be collected at five-foot intervals during exploratory
drilling using California modified split-spoon sampler through hollow-
stem auger. All possible efforts will be made to collect undisturbed
samples. Each sample that is to be chemically analyzed will be collected
in a brass sleeve, capped with lined plastic lids, sealed with tape, and
placed on ice in a cooler immediately. All Chain-of-Custody protocol will
be followed.
Drilling equipment will be brought to the site and operated by a
subcontractor:
Soils Engineering, Inc.
4700 District Boulevard
Bakersfield, California 93313
(805) 831 5100
C-57 License #253192
The SSP describes the means for protecting all on-site personnel from
deleterious contamination or personal injury while conducting on-site
activities. As described below AGI will meet all requirements
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promulgated by the California Department of Health Services.
SITE BACKGROUND
This property, located at 901 E. Truxtun Avenue, Bakersfield, California, is
currently unoccupied, but was formerly operated as Pence Petroleum
Automated Fuels. On November 1, 1989, all gasoline tanks, dispenser
islands, "and associated piping were removed from the site.
RESPONSIBILITY OF KEY PERSONNEL:
AU personnel on-site will have assigned responsibilities. Mr. Phil
Goalwin, R.G. of AquaGeosciences, Inc. will serve as Project Manager and
Mr. David Crane will serve as On-Site Geologist. Mr. Crane will also serve
as Site Safety Officer (SSO) and will ensure that on-site personnel have
received a copy of the SSP. Personnel will be required to document their
full understanding of the SSP before admission to the site. Compliance
with the SSP will be monitored at all times by the SSO. Appropriate
personal protective equipment, listed below, will be used. The SSO will
conduct a training session to assure that all are aware of safe work
practices. In the training session, personnel will be made aware of
hazards at the site and will utilize Material Safety Data Sheets for
information on compounds.
The SSO will also be responsible for keeping field notes, collecting and
securing samples, and assuring sample integrity by adherence to Chain-of-
Custody protocol.
On-site employees will take reasonable precautions to avoid unforeseen
hazards. After documenting understanding of the SSP, each on-site
employee will be responsible for strict adherence to all points contained
herein. Any deviation observed will be reported to the SSO and corrected.
On-site employees are held responsible to perform only those tasks for
which they believe they are qualified.
Provisions of this SSP are mandatory and personnel associated with on-
site activities will adhere strictly hereto.
JOB HAZARD ANALYSIS:
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Hazards likely to be encountered on-site include those commonly
encountered when operating any mechanical equipment, such as the danger
of falling objects or moving machinery.
Simple precautions will reduce or eliminate risks associated with
operating such equipment.
A drilling contractor has been employed to deliver and operate all drilling
equipment. Qualified personnel only will have any contact with this
equipment. All on-site personnel, including the drilling contractor and his
employees, are required to wear hard hats when in close proximity to
drilling equipment. Latex gloves will be worn by persons collected or
handling samples to prevent exposure to contaminants. Gloves will be
changed between samples, and used ones discarded, to avoid cross-
contamination. Proper respiratory equipment will be worn if vapor
contamination levels on-site exceed action levels as determined using
PID. Action levels requiring respiratory apparatus will be 5 ppm in the
breathing space. Furthermore, no on-site smoking, open flame, or sparks
will be permitted in order to prevent accidental ignition.
RISK ASSESSMENT SUMMARY:
Exposure to chemicals anticipated on-site include gasoline, and benzene,
toluene, and xylene (BTX). These chemicals represent a hazard as they are
moderately to extremely toxic and most are highly flammable. Threshold
Limit Values (TL V's), Short Term Exposure Limits (STEL's), and Toxicity
levels (LD50, oral-rat), all in mg/kg (ppm), are listed below:
GaJ1f'Ct.ND TLV STEL TOXICITY
Gasoline 200 300 --------
Benzene 10 25 4894
Toluene 100 150 5000
Xylene 100 150 4300
Benzene is considered an extreme cancer hazard.
EXPOSURE MONITORING PlAN:
A Photo-Ionization Detector (PI D) will be used to monitor vapor
concentrations around site. Should concentrations exceed TL V's,
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protective measures will be taken. Passive dosimeter badges will be
placed in downwind locations if PID reading indicate high levels of
volatile organics in the breathing space.
PERSONAL PROTECTIVE EQUIPMENT:
Personnel on-site will have access to respirators with organic vapor
cartridge·s. Replacement cartridges will be available on-site as needed.
When handling samples, the on-site geologist will wear latex gloves. Hard
hats will be worn by all personnel on-site when in proximity of drilling
equipment.
WORK ZONES AND SECURITY MEASURES:
Access to the site will be restricted to authorized personnel. A set of
cones, placards, or wide yellow tape, surrounding the site will define
perimeter. The Project Manager will be responsible for site security.
DECONTAMINATION MEASURES:
Avoidance of contamination whenever possible is the best method for
protection. Common sense dictates that on-site personnel avoid sitting,
leaning, or placing equipment on possibly contaminated soil.
All personnel will be advised to wash their hands, neck, and face with
soap and water before taking a break or leaving the site. Respirators will
be washed with soap and water following each day's use.
Drilling and sampling equipment used will be decontaminated by steam-
cleaning. Sampling equipment will be decontaminated before each sample
is taken and drilling equipment will be decontaminated before each boring
is commenced.
GENERAL SAFE WORK PRACTICES:
Drillers and other on-site personnel will be briefed each day in "tailgate"
meetings as to the day's goals and equipment to be used. Anticipated
contaminants and emergency procedures will be reviewed. Appropriate
personal protective equipment will be put on and verified correct by SSO,
including respirator fit.
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Drilling and sampling equipment will be steam-cleaned before being
brought on-site. Split-spoon sampling equipment will be steam-cleaned
before each use. Augers will be steam-cleaned between borings.
The On-Site Geologist will oversee operations and log borings in
consultation with drillers. The Sample Coordinator will assure that
proper protocol is used at all times in collecting and handling samples.
TRAINING REQUIREMENTS:
The SSO will conduct a pre-site training session which will include all
points of MSDS forms, contaminant properties, warning signs, health
hazard data, risk for exposure, and emergency first aid. All chemicals
expected to be encountered will be covered and the SSO will ensure that
everyone fully understands site hazards.
MEDICAL SURVEILlANCE PROGRAM:
According to CFR 29, 1910.120, paragraph (f), employees who wear
respirators 30 days or more during one year or who have been exposed to
hazardous substances or health hazards above established permissible
exposure limits are required to be monitored medically. All site personnel
will be required to have had a complete chemical physical within the past
year.
RECORD KEEPING:
Documentation will be kept on personnel exposed to contaminant hazards
on the job site according to OSHA regulations. These will include
documentation that employees have received training on the SSP,
respiratory protection, MSDS forms, and all emergency procedures. These
will be reviewed during the pre-site training meeting.
Exposure records on each job will be kept for 30 years to meet
requirements. Included will be names and social security number of
employees, medical evaluation, on-the-job logs from entry to exit, first
aid administered, visits on-site by outside persons, and personal air
monitoring records.
CONTINGENCY PLANS:
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In the event of accident, injury, or other emergency, the Project Director,
Senior Project Manager, or other person will notify appropriate
government agencies of individuals as follows:
1. Kern County Department of Environmental
Health Services
2700 "M" Street
Bakersfield, California 93301
Ms. Flora Darling
(805)836-2261
2. Police, Fire, or Ambulance Emergency
911
3. Nearest Emergency Hospital:
Mercy Hospital
2215 Truxtun Ave.
Bakersfield, California 93301
(805 )327 -3371
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Groundwater Scientists · Environmental Consultants
First and Second Quarter.1993
Vapor Extraction Quarterly Report
Pence Petroleum Automated Fuels
901 East Truxtun Ave.
Bakersfield, California
Presented to
Mr. Robb Pence
Presented By
AquaGeosciences, Inc.
June, 1993
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PatriCkW. McCullough
Staff Geologist
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Principal Hydrogeologist
Registration Expires 6/30/94
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1701 Westwind Drive, Suite 101 · Bakersfield, California 93301
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Table of Contents
Sections
Pages
1 .0 Introduction ................................ ........................ ....................................... ..... ............2
2.0 Facility Description ........ .................... ...................... ....................... ..........................2
3.0 Project History ... ....... .... ....... ......... ................... ... ........ ...... .... .....................................2
4.0 Vapor Extraction Moni1oring ........................... ............ ............................... .............3
5.0 Conclusions & Recommendation......... ................................................................. ...3
,Exhibits
1 . Site Map
2. vac Concentrations vs. Time
3. Cross-Section A-A' (showing proposed completion intervals)
1 of 3
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1.0 Introduction
This report presents the results of the first and second quarter, 1993 Vapor Extraction
monitoring performed by AquaGeosciences, Inc. (AGI) at the Pence Petroleum
Automated Fuel site at 901 East Truxtun Ave., Bakersfield, California. These results
are reported from January through June, 1993.
2.0 Facility Description
The property is currently unoccupied and was formerly operated as Pence Automated
Fuels by the Pence Petroleum Company. Prior to 1986, the site was owned by Davies
Oil, Bakersfield, California; however, information regarding site usage was
unavailable.
3.0 Project History
On November 1, 1989, two (2) 6,000 gallon underground gasoline storage tanks, one
(1) 10,000 gallon underground gasoline storage tank, one dispenser island and
associated product lines were removed from Pence Petroleum's Automated Fuels
Cardlock at 901 E. Truxtun Avenue, Bakersfield, California. Soil Samples collected at
that time indicated that the soil had been impacted with gasoline, and that a site
characterization study would be required.
Subsequently, Associated Soils Analysis advanced four soil borings to a maximum
depth of 120 feet below surface grade. Boring B-3 advanced through the location
along the product line where the release is believed to have originated, detected
gasoline at 24,000 mg/kg at 50 feet below surface grade. That boring was terminated
at 80 feet below surface grade with gasoline detected at 4,700 mg/kg. Boring B-3A,
advanced ten feet to the west, detected gasoline at 0.54 mg/kg at 90 feet below
surface grade, and had indications of continued low levels of impaction to 120 feet
below surface grade where the boring was terminated.
This previous Phase I assessment work did not delineate the vertical limit of gasoline
beneath the probable product line release, nor the lateral limits of the plume to the
north, east, or south. For these reasons the County required that the full lateral and
vertical extent of soil impaction be assessed as a Phase II characterization. This
additional work was completed as part of the initial stages of the remediation. Four (4)
borings ( VI-1, VE-1, VE-2 and VE-3) were advanced to complete this assessment.
These additional borings were then completed as vapor extractionlinlet welis with the
screened intervals and depths selected based upon field screening of the samples.
2 of 3
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4.0 Vapor Extraction Monitoring
The vapor extraction process at the Pence site began in August 1992. The internal
combustion engine (ICE) is utilized for both vapor evacuation and hydrocarbon
oxidation. The ICE unit is monitored daily to insure maximum run time and compliance
with the condit~e .QP~ting perm.-i-t_--.- -
-¡;;g;:e:I, the unit is performin~well;owever, we are experiencing ~
/time required for equipment maintenance and parts replacement. The down time is
also partially caused by changing operation conditions; namely, hydrocarbon vapor
concentrations. The ICE unit, however, has not used any supplemental propane in the
last 3 months and liquid gasoline is condensing in the water knock-out. This has
required the addition of dilution air at the surface.
Tot e site remediation is best determined by monitoring Volatile
Organic Compound (VOC), emissions from the exhaust of the ICE. In the attached
exhibit 1, a plot of VOC concentrations vs. time is presented. From this graph, covering
the period from 11-02-92 to 6-30-93, it can be seen, that desired stabilized conditions
have not yet been achieved.
5.0 Conclusions & Recommendations
Based upon the high concentrations of VOC emissions, liquid petroleum hydrocarbons
condensing in the water knock-out system, the lack of supplemental fuel usage, and
the requirement for dilution air additions at the surface, AGI concludes that high
petroleum hydrocarbon concentrations continue to persist in the subsurface soil at the
Pence site. Further, AGI concludes that additional air/vapor inlet wells should be
installed to provide air flow through the impacted soil profile. This subsurface air flow
will both enhance and stabilize the vapor extraction process. Subsurface air flow will
enhance the process by sweeping air across the impacted soil thereby removing
volatile hydrocarbons from the distal edges of the plume which in turn will allow for a
more complete hydrocarbon removal. Subsurface air flow will stabilize the process by
diluting or mixing lower concentration vapors with the higher concentration vapor
stream currently being processed by the IC engine.
To accomplish these goals, AGI recommends drilling and completing three (3)
additional inlet wells to depths of 40, 80, and 105 feet, respectively. The proposed
locations of the vapor inlet wells, herein designated VI-4, VI-5, and VI-6 are shown in
plan view on Exhibit 1. Cross-section A-A' (Exhibit 3) graphically shows the location of
VI-4, VI-5, and VI-6 and includes the proposed completion intervals.
Finally, AGI recommends that sufficient soil samples be collected and analyzed during
the installation of these wells, to evaluate the progress of the remediation
accomplished to date and estimate the length of time required to complete the
remediation.
3 of 3
\
N
Estimated Portion of Plume
Requiring Remediation
Former Gasoline
Tanks and
Dispenser Island
manhole
o
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en
East Truxtun
- --
.
streetlight
parking lot
- --
East 18th
SCALE 1" = 20'
. Prior Boring Location
o Vapor Extraction/Inlet well
o Proposed inlet wells
AquaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-11 29
Title
Pence Petroleum
901 E. Truxtun
Bakersfield, California
SITE MAP
Exhibit
1
PPM
CONC
500
400
300
200
100
t Feb.
11102/92
PAUSE
11/04/92 to 01111193
AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
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All data
>1000
Apr.
May
6130/93
Pence Petroleum
90 1 E. Truxtun
Bakersfield. California
VOC CONCENTRATIONS
TIME
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EXHIBIT 3
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"Ö;;;undwater Scientists · Environmental Consultants
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Workplan for Soil Remediation
at
901 E. Truxtun Avenue
Bakersfield, California
Presented To:
Mr. Robb Pence
Pence Petroleum Co.
Presented By:
AquaGeosciences, Inc.
February, 1992
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Thomas Reeves
Project Engineer
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Principal Hydrogeologist
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1.0
1.1
1.2
1.3
2.0
2.1
2.2
3.0
3.1
3.2
3.3
4.0
5.0
6.0
6.1
6.2
6.3
6.4
7.0
8.0
9.0
9.1
9.2
9.3
10.0
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Table of Contents
Introduction
Purpose
Scope of Services
Schedule
Background
Facility Description
Project His tory
Work plan
Vapor Extraction/Inlet Well Locations & Depths
Well Head Design and Valve Configuration
Vacuum Measurements and Radius of Influence
Treatment Objectives
Evaluation of Mitigation
Confirmation Boring, Soil Sampling, Field
Screening and Chemical Analytical Methods
Boring Methods
Soil Sampling
Field Screening
Soil Analysis
Decommissioning of Remediation Equipment
Final Report
Quality Assurance Plan
Sample Collection and Handling Protocol
Sample Identification and Chain-of-Custody Protocol
Analytical Quality Assurance
Site Safety Plan
Exhibits 1
2
3-6
Vicinity Map
Site Map
Vapor Extraction/Inlet Well Completion Diagrams
Appendix A
B
C
Site Safety Plan
Summary of Analytical Data
Cross Section Drawings
Page
1
1
1
1
1
2
2
3
3
4
4
4
4
5
5
5
6
6
6
6
7
7
7
7
8
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1.0 INTRODUCTION
Pence Petroleum Co. has authorized AquaGeosciences, Inc. to prepare this workplan
for soil remediation at the former gasoline service station located at 901 East
Truxtun A ven ue, Bakersfield, California.
1.1 PURPOSE
The soil remediation described in this workplan has the following objectives:
*
Remove volatile fuel hydrocarbons from the soil using an Internal
Combustion Engine vapor extraction system.
1.2 SCOPE OF SERVICES
The scope of services describes in this workplan include:
* Installation of vapor extraction system to include an internal combustion
engine;
*
Permitting, operation, monitoring and maintenance of a vapor extraction
system manifolded to the wells;
*
Confirmation borings to assess thé effectiveness and signify an endpoint to
remedia tion;
*
Preparation of a report summarizing methods and results of the soil
remedia tion.
1.3 SCHEDULE
AquaGeosciences, Inc. anticipates beginning work described in this workplan within
one week upon approval from both the County and the Client. Installation of the
vapor extraction/inlet wells in the soil borings has already been completed. Pending
approval to construct and operate the VES by the Kern County Air Pollution
Control District, AquaGeosciences anticipates construction and installation of the
VES including all associated piping and manifolding within one month from the
approval of the workplan. Upon completion of the remediation, AquaGeosciences,
Inc. will issue a Final Report of Findings.
2.0 BACKGROUND
The site is located at 901 East Truxtun Avenue, Bakersfield, California as shown on
Exhibit 1.
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2.1 FACILITY DESCRIPTION
The property is currently unoccupied and was formerly operated as Pence
Automated Fuels by the Pence Petroleum Company. Prior to 1986, the site was
owned by Davies Oil, Bakersfield, California, however, information regarding site
usage was unavailable.
2.2 PROJECT HISTORY
On November 1, 1989, two (2) 6,000 gallon underground gasoline storage tanks, one
(1) 10,000 gallon underground gasoline storage tank, one dispenser island and
associated product lines were removed from Pence Petroleum's Automated Fuels
Cardlock at 901 E. Truxtun Avenue, Bakersfield, California. Soil Samples collected at
that time indicated that the soil had been impacted with gasoline, and that a site
characterization study would be required.
Subsequently, Associated Soils Analysis advanced four soil borings to a maximum
depth of 120 feet below surface grade. Boring B-3 advanced through the location
along the product line where the release is believed to have originated, detected
gasoline at 24,000 mg/kg at 50 feet below surface grade. That boring was terminated
at 80 feet below surface grade with gasoline detected at 4,700 mg/kg. Boring B-3 A,
advanced ten feet to the west, detected gasoline at 0.54 mg/kg at 90 feet below surface
grade, and had indications of continued low levels of impaction to 120 feet below
surface grade where the boring was terminated.
This previous Phase I assessment work did not delineate the vertical limit of
gasoline beneath the probable product line release, nor the lateral limits of the
plume to the north, east, or south. For these reasons the County required that the
full lateral and vertical extent of soil impaction be assessed as a Phase II
characterization. This additional work was completed as part of the initial stages of
the remediation. Four (4) borings ( VI-I, VE-I, VE-2 and VE-3) were advanced to
complete this assessment. These additional borings were then completed as vapor
extraction/inlet wells with the screened intervals and depths selected based upon
field screning of the samples. Well locations and descriptions are given below in
section 3.1. A summary of analytical results may be found in Appendix B.
3.0 WORKPLAN
AquaGeosciences, Inc. plans to install an internal combustion engine vapor
extraction system at this site. Using existing vapor extraction/inlet wells,
AquaGeosciences, Inc. will manifold those existing wells to the vapor extraction
system. A treatability study will be performed to confirm the suitability of the
chosen remedial technology. Additionally, the effectiveness of the remediation will
be confirmed by advancing soil borings through the contaminant plume region.
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3.I VAPOR EXTRACTION /INLET WELL LOCATIONS AND DEPTHS
Exhibit 2 shows the locations of the existing vapor extraction/inlet wells as well as
locations of prior borings. The locations, depths, and screened intervals were
chosen to provide lateral and vertical coverage of the impacted plume as interpreted
from previous assessment data as well as field data gathered at the time of the well
installation. In general, the vadose plume approximates a teardrop shape beginning
at approximately IO feet below grade and extending to a depth of I20 feet below
grade. As indicated by the cross-sections included as Appendix C, the plume begins
to spread laterally at a depth of 70 feet below grade, reaching a maximum radius of
nearly 140 feet (NOTE: this is based upon the extreme boundary of the plume. ie.
N on-Detect analytical results.). The region of this plume requiring remediation is
estimated to approximate a right cylinder with a radius of 25 feet and a height of IOO
feet.
Wells VI-I, VE-I, VE-2, and VE-3 have been placed within perimeter of the plume
and are screened as follows. In the middle portion of the plume VI-1 is screened
from 25 to 65 feet below grade. VE-I is screned across the deep portion of the plume
from 65 to 95 feet below grade. Screened between 40 an 80 feet below grade VE-2 is
completed slightly above VE-I in the mid to deep section of the plume. VE-3 is
screened across the interval of IO to 40 fet below grade in the shallow zone of the
plume. Completion detail drawings for wells VI-I, VE-I, VE-2, and VE-3 are
included as Exhibits 3 through 6.
Locations of the wells and their relationships to the contaminant plume are
indicated on Exhibit 2-Site Map.
3.2 WELL HEAD DESIGN AND VAL VE CONFIGURATION
Each of the four (4) wells will be equipped with a 2-inch globe valve to control flow
in each of these wells. Flow control on the air inlet wells will help balance
anisotropic flow in the vadose zone due to lithology as measured during the
feasibility study. The well to be placed on vacuum will be manifolded to the IC
Engine VES with two (2) inch diameter flex vacuum hose equiped with cam lock
fitings.
3.3 VACUUM MEASUREMENT AND RADIUS OF INFLUENCE
To estimate the radius of influence for the well configuration we will conduct a field
feasibility test. The field feasibility test will consist of applying a vacuum to each
well in rotation. A vacuum pressure gauge will be placed on each of the three (3)
remaining vapor extraction/inlet wells in turn to measure the vacuum drawdown
at each location. The vacuum pressure gauge to be employed will be capable of
detecting pressure changes as low as O.I-inch of water.
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Vacuum drawdown will be recorded from each inlet well and will be plotted against
distance. The distance-drawdown curves thus generated will yield the empirical
data necessary to estimate whether the well configuration will provide sufficient
lateral coverage to effectively remediate the impacted soil.
The radius of influence testing will also yield information regarding anisotropic
flow in the vadose zone which will be used to determine the inlet well valve
configura tion.
4.0 TREATMENT OBJECTIVES
The objective of this remediation is to reduce the concentration of contaminants in
vadose zones to levels which are consistent with LUFT manual guidelines and Kern
County Environmental Health Services Division requirements. The proposed
remedial objectives for this site are: TPH as gasoline IOO ppm, benzene 0.3 ppm,
toluene 0.3 ppm, ethylbenzene 1.0 ppm, and total xylenes 1.0 ppm.
5.0 EVALUATION OF MITIGATION
The mitigation of the site will proceed until gasoline vapor concentrations in the
inlet air stream have been reduced to IO ppm, as determined by a PID. The machine
will be shut down for a period of approximately one week to allow any residual
vapors to accumulate and will then be restarted. This process will be repeated until
the concentration of gasoline vapors in the inlet air stream remain below IO ppm
after restarting the VES system.
A soil boring will then be advanced through the center of the former contaminant
plume where highest concentrations were found. The confirmation soil boring will
be advanced to a depth of I20 feet. Soil samples will be collected at every five foot
interval from IS to I20 feet and selected representative soil samples will be
submitted for chemical analysis.
The vapor extraction system and operation will be monitored according to the
monitoring/ testing program as required by the Kern County Air Pollution Control
District in the Authority to Construct. Detailed field monitoring logs will be kept
and monthly status reports will be generated and submitted to our client. The
reports will detail equipment operations, influent/ effluent concentrations and will
document the progress of the remediation.
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6.0 CONFIRMATION BORING, SOIL SAMPLING, FIELD SCREENING AND
CHEMICAL ANALYTICAL METHODS
The following sections will detail the methods to be employed for confirmation
sampling at the end of remedial activities.
6.1 BORING METHODS
The confirmation soil boring will be advanced using a Mobile Drill B-53 Rig, or
equivalent equipped, with 6 5/8 inch or larger hollow stem continuous flight augers
in accordance with ASTM Method D1452-80 for soil investigations and sampling by
auger borings. The auger and hammer will be steam cleaned prior to drilling each
boring.
The lithology and other pertinent data will be recorded on a field boring log in
accordance with ASTM Method D2488-84 for visual description and identification of
soils. Borings will be logged by or under the direct supervision of a California
Registered Geologist.
Cuttings and other spoil from the borings will be placed back in the borehole if field
screening indicates clean samples. If contaminants are detected from field screening,
the cuttings will be stored in D.O.T. approved 55-gallon drums pending analysis.
6.2 SOIL SAMPLING
Soil samples will be collected through the auger in 2-inch brass sleeves driven in a
split spoon sampler by a I40 pound hammer with a 30-inch drop in accordance with
ASTM Methods D1586-84 for split-barrel sampling of soil and D1587-83 for thin
walled tube sampling of soils. The brass sleeves and sampler will be steam cleaned
prior to each use.
Soil samples will be driven at five foot intervals. The blow counts, recovery, and
lithology will be recorded on field logs. Lithology will be described in accordance
with the Unified Soil Classification System (USCS). One brass sleeve with soil from
each interval will be capped, sealed, and labeled in accordance with EP A protocols,
recorded on a Chain-of-Custody form, placed in a cooler at 40 centigrade or less, and
transported to a California Certified Laboratory with the Chain-of-Custody for the
specified analyses. Selected samples will be analyzed and the other samples will be
held no more than fourteen days for further analyses if necessary.
6.3 FIELD SCREENING
Soil samples will be collected using three six-inch brass tubes installed inside a split
spoon sampler. The middle sample tube will be immediately capped with a teflon
liner separating the soil from the lid, and stored in an iced cooler. The bottom tube
will be used for lithologic description, and the top tube will be used for field
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screening. The material from the top tube will be placed in a mason jar to
approximately 50 percent capacity, shaken, and stored for a period of 15 minutes. A
standard headspace reading will be collected at this time and noted on the boring
log.
6.4 SOIL ANAL YSIS
The soil samples will be analyzed by Mobile Labs, Inc., a California State Certified
Laboratory in accordance with state guidelines and E;P A protocols. The samples will
be analyzed for Total Petroleum Hydrocarbons as gasoline, benzene, toluene, xylene,
and ethylbenzene (BTXE) using the D.O.H.5. L.U.F.T. Method and EPA Method 8020,
respectively.
7.0 DECOMMISSIONING OF REMEDIATION EQUIPMENT
After remediation is complete, the vapor extraction wells and the vapor extraction
system will be dismantled. All of the inlet/ extraction wells will be backfilled with
cement grout. No surface evidence of remedial activities will be present following
decommissioning.
8.0 FINAL REPORT
When the remediation process is deemed complete a final report will be submitted
to the Client. This report will include all remedial field operations, analytical data,
and final conclusions. After review by the Client the report will be submitted to
Kern County Environmental Health Services Department. The final report will be
certified by a California Registered Geologist.
9.0 QUALITY ASSURANCE PLAN
This section describes field and analytical quality-assurance procedures to be
followed during the remediation.
9.1 SAMPLE COLLECTION AND HANDLING PROTOCOL
Proper sample collection and handling are essential to assure quality of data
obtained from a sample. Each sample therefore will be collected in a brass tube,
preserved correctly for the intended analysis and stored for no longer than the
permissible holding time prior to analysis. Protocol to be applied in this project is
described in Section 6.2.
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9.2 SAMPLE IDENTIFICATION AND CHAIN OF CUSTODY PROTOCOL
Sample identification and Chain of Custody procedures are designed to assure
sample quality and to document sample possession from the time it is collected to
the time of its ultimate disposal. The container for each sample submitted for
analysis will have a label affixed with the identifying number or the number will be
inscribed directly on the container if feasible. The analytical laboratory will assign a
separate sample number unique to that sample for internal sample coordination
and identification. A description of the sample, including the sample number and
other pertinent information regarding its collection and/ or geologic significance
will be written in field notes and/ or a geologic boring log prepared by the site
geologist. These field documents will be kept in a permanent project file. All
samples will be analyzed by a State Certified Laboratory for the analyses requested.
A properly completed Chain of Custody document will be submitted to the
analytical laboratory along with the samples. The laboratory's assigned number will
be properly entered on the form. A quality control officer at the lab will verify the
integrity of the samples submitted, proper sample volume, correctness of containers
used and properly executed Chain of Custody document. Pertinent information will
be entered into a log book kept by the laboratory.
9.3 ANALYTICAL QUALITY ASSURANCE
In addition to routine calibration of analytical instruments with standards and
blanks, the analyst is required to run duplicates and spikes on 10 percent of analyses
to assure an added measure of reliability and precision. Accuracy is verified through
the following:
1. U.s. EP A and State certification of results;
2. Participation in inter-laboratory round robin programs;
3. "Blind" samples are submitted for analysis by the qualitycontrol officer
on a weekly basis. These are preparedfrom National Bureau of
Standards specifications of EP Areference standards;
4. Verification of results with an alternative method.
10.0 SITE SAFETY PLAN
Appendix A contains a Site Safety Plan which complies with the Worker Right to
Know Regulations and CAC Title 26.
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EXHIBITS
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. Prior Boring Location
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Approximate NO
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AauaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (80S) 328-0962
Fax 328-1129
Title
Pence Petroleum
901 E. T ruxtun
Bakersfield, Califomia
SITE MAP
Exhibit
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VE- 1 Completion Detail
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1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
Title
WELL DIAGRAM
Pence Petroleum
VE-2 Completion Detail
Exhibit
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END CAP
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AquaGeosciences. Inc.
1701 West wind Drive Suite 103
Bakersfield, California 93301
Telephone: (80S) 328-0962
Fax 328-1129
Title
WELL DIAGRAM
Pence Petroleum
VE-3 Completion Detail
Exhibit
5
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AQuaGeosciences. Inc.
1701 Westwind Drive Suite 103
Bakersfield, California 93301
Telephone: (805) 328-0962
Fax 328-1129
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Title
WELL DIAGRAM
Pence Petroleum
VI- 1 Completion Detail
Exhibit
6
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APPENDIX A
SITE SAFETY PLAN
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SITE SAFETY PLAN
INTRODUCTION:
A Site Safety Plan (SSP) has been designed to address safety provisions needed
during the site soil remediation. Its purpose is to provide established procedures to
protect all on-site personnel from direct skin contact, inhalation, or ingestion of
potentially hazardous materials that may be encountered at the site. The SSP
establishes personnel responsibilities, personal protective equipment standards
decontamination procedures, and emergency action plans.
AquaGeosciences, Inc. seeks to enter property described above for the purpose of
installing a vapor extraction system consisting of four (4) vapor extraction/inlet
wells, manifolding, vapor extraction trailer and internal combustion engine unit.
Drilling equipment will be brought to the site and operated by a subcontractor:
Melton Drilling
1701 Downing Avenue
Bakersfield, California 93308
C-57 License Number 508270
The SSP describes means for protecting all on-site personnel from deleterious
contamination or personal injury while conducting on-site activities. As described
below we will meet all requirements promulgated by the California Department of
Health Services.
SITE BACKGROUND
This property, now vacant, was formerly a gasoline service station. On November 1,
1989, two (2) 6,000 gallon underground gasoline storage tanks, one (1) 10,000 gallon
underground gasoline storage tank, one dispenser island and associated product
lines were removed. Subsequently, site characterization has been performed
assesing the extent of the contaminant plume. During the characterization phase
four (4) of the soil borings that were advanced were completed as vapor
extraction/inlet wells. These wells will be used during the remediation phase of
this project.
RESPONSIBILITY OF KEY PERSONNEL:
All personnel on-site will have assigned responsibilities. Mr. Phil Goalwin, RG. of
AquaGeosciences, Inc. will serve as Project Manager and On-Site Geologist. Mr.
Thomas Reeves will serve as Project Engineer. He will also serve as Site Safety
Officer (SSO). As SSO, Mr. Reeves will assure that on-site personnel have received a
copy of SSP. Personnel will be required to document their full understanding of the
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SSP before admission to the site. Compliance with the SSP will be monitored at all
times by the SSO. Appropriate personal protective equipment, listed below, will be
used as necessary. Mr. Goalwin will conduct a training session to assure that all are
aware of safe work practices. In the training session, personnel will be made aware
of hazards at the site and will utilize Material Safety Data Sheets for information on
compounds.
The SSO will also be responsible for keeping field notes, collecting and securing
samples, and assuring sample integrity by adherence to Chain-of-Custody protocol.
On-site employees will take reasonable precautions to avoid unforseen hazards.
After documenting understanding of the SSP, each on-site employee will be
responsible for strict adherence to all points contained herein. Any deviation
observed will be reported to the SSO and corrected. On-site employees are held
responsible to perform only those tasks for which they believe they are qualified.
Provisions of this SSP are mandatory and personnel associated with on-site
activities will adhere strictly hereto.
JOB HAZARD ANALYSIS:
Hazards likely to be encountered on-site include those commonly encountered
when operating any mechanical equipment, such as the danger of falling objects or
moving machinery.
Simple precautions will reduce or eliminate risks associated with operating such
equipment.
A drilling contractor has been employed to deliver and operate all drilling
equipment. Qualified personnel only will have any contact with this equipment.
All on-site personnel, including the drilling contractor and his employees, are
required to wear hard hats when in close proximity to drilling equipment. Latex
gloves will be worn by persons collected or handling samples to prevent exposure to
contaminants. Gloves will be changed between samples, and used ones discarded, to
avoid cross-contamination. Proper respiratory equipment will be worn if vapor
contamination levels on-site exceed action levels as determined using PID. Action
levels requiring respiratory apparatus will be 5 ppm, in the breathing space.
Furthermore, no on-site smoking, open flame, or sparks will be permitted in order
to prevent accidental ignition.
RISK ASSESSMENT SUMMARY:
Exposure to chemicals anticipated on-site include gasoline, benzene, toluene, and
xylene (BTX). These chemicals represent a hazard because they are moderately to
extremely toxic and most are highly flammable.
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Threshold Limit Values (TL V's), Short Term Exposure Limits (STEL's), and Toxicity
levels (LD50, oral-rat), all in mg/kg (ppm), are listed below:
COMPOUND TLV STEL TOXICITY
Gasoline 200 300 --------
Benzene 10 25 4894
Toluene IOO 50 5000
Xylene 100 150 4300
Benzene is considered an extreme cancer hazard.
EXPOSURE MONITORING PLAN:
A Photo-Ionization Detector (PID) will be used to monitor vapor concentrations
around site. Should concentrations exceed TL V's, protective measures will be taken.
Passive dosimeter badges will be placed in downwind locations if PID reading
indicate high levels of volatile organics in the breathing space.
PERSONAL PROTECTIVE EQUIPMENT:
Personnel on-site will have access to respirators with organic vapor cartridges.
Replacement cartridges will be available on-site as needed. When handling
samples, the on-site geologist will wear latex gloves. Hard hats will be worn by all
personnel on-site when in proximity of drilling equipment.
WORK ZONES AND SECURITY MEASURES:
Access to the site will be restricted to authorized personnel. Fencing, a set of cones,
placards, or wide yellow tape, surrounding the site will define perimeter. The
Project Manager will be responsible for site security.
DECONT AMINA TION MEASURES:
Avoidance of contamination whenever possible is the best method for protection.
Common sense dictates that on-site personnel avoid sitting, leaning, or placing
equipment on possibly contaminated soil.
All personnel will be advised to wash their hands, neck, and face with soap and
water before taking a break or leaving the site. Respirators will be washed with soap
and water following each day's use. Drilling and sampling equipment used will be
decontaminated by steam-cleaning. Sampling equipment will be decontaminated
before each sample is taken and drilling equipment will be decontaminated before
each boring is commenced.
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GENERAL SAFE WORK PRACTICES:
Drillers and other on-site personnel will be briefed each day in "tailgate" meetings as
to the day's goals and equipment to be used. Anticipated contaminants and
emergency procedures will be reviewed. Appropriate personal protective
equipment will be put on and verified correct by SSO, including respirator fit.
Drilling and sampling equipment will be steam-cleaned before being brought on-
site. Split-spoon sampling equipment will be steam-cleaned before each use.
Augers will be steam-cleaned between borings.
The On-Site Geologist will oversee operations and log borings in consultation with
drillers. The Sample Coordinator will assure that proper protocol is used at all
times in collecting and handling samples.
TRAINING REQUIREMENTS:
The SSO will conduct a pre-site training session which will include all points of
MSDS forms, contaminant properties, warning signs, health hazard data, risk for
exposure, and emergency first aid. All chemicals to be covered and the SSO will
assure that everyone fully understands site hazards.
MEDICAL SURVEILLANCE PROGRAM:
According to CFR 29, 1910.120, paragraph (f), employees who wear respirators 30 days
or more during one year or who have been exposed to hazardous substances or
health hazards above established permissible exposure limits are required to be
monitored medically. All site personnel will be required to have had a complete
chemical physical within the past year.
RECORD KEEPING:
Documentation will be kept on personnel exposed to contaminant hazards on the
job site according to OSHA regulations. These will include documentation that
employees have received training on the SSP, respiratory protection, MSDS forms,
and all emergency procedures. These will be reviewed during the pre-site training
meeting.
Exposure records on each job will be kept for 30 years to meet requirements.
Included will be names and social security number of employees, medical
evaluation, on-the-job logs from entry to exit, first aid administered, visits on-site by
outside persons, and personal air monitoring records.
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CONTINGENCY PLANS:
In the event of accident, injury, or other emergency, the Project Director, Senior
Project Manager, or other person will notify appropriate government agencies of
individuals as follows:
1. Kern County Department of Environmental
Heal th Services
2700 "M" Street
Bakersfield, California 93301
Ms. Flora Darling
(805) 836-2261
2. Police, Fire, or Ambulance Emergency
911
3. Nearest Emergency Hospital:
Mercy Hospital
2215 Truxtun Avenue
Bakersfield, California 93301
(805) 327-3371
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APPENDIX B
SUMMARY OF ANALYTICAL RESULTS
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Summary of Analytical Results
Boring Depth Benzene Toluene Ethylbenzene Xylene ~
B2 11 ND ND ND ND ND
B2 16 ND ND ND ND ND
B2 26 ND ND ND ND ND
B2 36 0.013 0.028 ND 0.0178 ND
B2 51 0.29 0.49 0.030 0.179 5.2
B3 11 3.1 49 13 184 1800
B3 31 21 340 78 480 4200
B3 51 370 2000 400 2430 24000
83 71 340 1600 350 12080 18000
83 81 44 370 97 600 4700
B3A 90 0.061 0.006 0.069 0.022 0.54
B3A 95 0.073 0.062 0.38 0.31 2.2
B3A 100 0.008 0.006 0.023 0.018 ND
B3A 105 0.032 0.32 0.17 0.16 1.3
B3A 110 7.0 ND 11 ND ND
B3A 115 0.01 0.01 0.042 0.05 0.62
B3A 120 0.041 0.052 0.28 0.27 2
B4 ' 75 0.078 0.009 ND 0.023 ND
84 85 0.18 0.19 0.025 0.057 0.82
84 95 0.38 0.05 0.22 0.18 2.0
84 105 0.3 0.35 0.13 0.11 1.5
B4 110 ND ND ND ND ND
B4 115 ND ND ND ND ND
B4 120 ND ND ND ND ND
VI-1 25 183.750 421.220 82.105 984.220 15000
VI-1 40 73.505 168.210 31.215 492.015 6625
VI-1 55 91.875 210.000 42.310 615.010 7420
VI-1 70 61.250 140.000 27.010 322.975 5105
VE-1 65 200.335 505.075 92.015 1105.125 17220
VE-1 85 147.310 323.015 52.710 779.875 12910
VE-1 100 0.995 1.210 0.275 4.225 1-25
VE-1 105 ND ND ND ND ND
VE-2 35 0.335 1. 010 0.105 2.220 120
VE-2 50 12.220 28.885 5.500 103.775 1850
VE-2 60 2.210 9.055 0.875 12.150 375
VE-2 80 ND ND ND ND 30
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.ß9ring Depth Benzene Toluene Ethylbenzene Xylene ~
Vr:-3 10 ND ND ND 0.105 80
VE-3 15 1.115 20.210 0.725 9.990 320
VE-3 20 11.775 26.210 3.330 88.845 1250
VE-3 30 17.200 50.270 7.710 161.075 1825
All results in milligrams per kilogram
ND = Hot ~etected
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APPENDIX C
CROSS SECTION DRAWINGS
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B-3
B-3A
SCALE: VERTICAL 1" = 20'
HORIZONTAL 1" = 20'
VE-2
VE-l
SCALE: VERTICAL 111 = 20'
HORIZONTAL 111 = 20'
B-4
B-2
VE-3 VI-l
NO
NO
NO
ND
SCALE: VERTICAL 1" = 20'
HORIZONTAL 1" = 20'