HomeMy WebLinkAboutMITIGATIONTe]mce R®fining
end ~erk®fing Inc
10 Universal City Plaza
Universal City CA 91608
October 2, 1995 '--/
ENV-SERVICE STATION .
~d Si~r~ Assessment
2401 North Oak Stree~/'
Bakersfield, CA~.~_
Mr. Mark T%]~Wk
Bakersfi~ City Fire Department
Hazard~ds Materials Division
2130/~ Street '
B.~rsfield,_ CA 93301
/~o~ ~mUsrka: copy of a workplan to conduct limited assessment
activities at the captioned Texaco facility. Should you have any
questions or comments, please call me at (818) 505-2739.
Sincerely,
Marcel L. Bouchez
Project Coordinator
Texaco Environmental Services
MLB:hs
w:~mlb~bako~2401wkpl.bfd
Enc~ure
PR:~'
Building on a Tradition of Quality
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ENV
AIVERICA
EN VIRONMEN TA L
ENGINEERING, CONSUL TING
& CONSTRUCTION
AN ENERGY AMERICA COMPANY
WORKPLAN
FOR
LIMITED SITE ASSESSMENT
Texaco Service Station
2401 North Oak Street
Bakersfield, California
Bakersfield Fire Department Permit No. BI-0043
Prepared For:
Texaco Environmental Services
10 Universal City Plaza
Universal City, California 91608-7812
(818) 505-2739
TES Job No. FMLB0605
Prepared By:
ENV America Incorporated
16 Technology, Suite 154
Irvine, Califomia 92718
714-453-9191
FAX 714-453-9292
ENV America Project No. TEX-0 l-F038
The following ENV America professionals were responsible for all work associated with this
project within the purview of the Professional Engineers' Act and Registered Geologist and
Geophysicist Act of the California Code of Regulations.
Principal Manager of Geoscience
P.E. No. C 042940 C.E.G. No. 1959
September 29, 1995
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TABLE OF CONTENTS
1.0 INTRODUCTION ....................................................... 1
2.0 BACKGROUND INFORMATION .......................................... 2
2.1 Earlier Site History ................................................ 2
2.2 Recent Environmental Work ......................................... 2
3.0 GEOLOGIC AND HYDROGEOLOGIC SETTING ............................ 4
3.1 Geology ........................................................ 4
3.2 Hydrogeology ...................................................
4.0 FIELD INVESTIGATION ................................................. 6
4.1 Overview ....................................................... 6
4.2 Field Work ...................................................... 6
4.2.1 Preliminary Activities ................................... 6
4.2.2 Drilling and Soil Sampling ............................... 6
4.2.3 Soil Sample Handling .................................. 7
4.2.4 Decontamination Procedures ............................. 8
4.2.5 Waste Handling ....................................... 8
4.3 Laboratory Analyses of Soil Samples .................................. 8
4.4 Reporting ....................................................... 9
5.0 LIMITATIONS ........................................................ 10
6.0 REFERENCES CITED ................................................... 11
LIST OF FIGURES
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Site Location Map
Site Plan
Boring Location Map
Soil Sample Location Map and Subsurface Profile (Central Pump Island)
Soil Sample Location Map and Subsurface Profile (Eastern Pump Island)
LIST OF EXHIBITS
Exhibit A
Exhibit B
BFD Directive
Hand-Augering Illustration
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1.0 INTRODUCTION
ENV America Incorporated (ENV America) was retained by Texaco Environmental Services (TES)
to prepare this site assessment workplan. The site is an active Texaco service station located at 2401
North Oak Street, Bakersfield, California.
The station is situated on the northwest comer of the intersection of North Oak Street and 24th Street,
about 1,650 feet east of State Highway 99. The site location is indicated on Figure 1 - Site Location
Map. The site is occupied by a station building and three pump islands. The general layout of the site
is shown on Figure 2 - Site Plan. Existing underground storage tanks (LISTs) include three containing
gasoline, and one containing diesel.
The purpose of the activities proposed herein is to further define the extent of impacted soil in the
vicinity of the central and eastern pump islands. This workplan has been prepared pursuant to an
August 29, 1995, directive from the City of Bakersfield Fire Department (BFD), which is attached
as Exhibit A - BFD Directive.
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2.0 BACKGROUND INFORMATION
2.1
Earlier Site History
Review of California and Alaska Oil Field Maps (Munger, 1992), reveals the western portion of the
site was once occupied by an uncompleted and abandoned Chewon oil well described as "Chevron
KCL-5, 30-6879, No. 4." Details, descriptions and the exact location of the well were not available
as of this writing.
Based on information provided'by TES, the subject service station was originally operated as a
Mohawk service station by the Getty Oil Company through early 1985. Fuel from leaking underground
storage tanks and piping was first encountered in 1983. · Previous investigations and remediation
activities at the site included removal of defective leaking fuel underground storage tanks; installation
of groundwater monitoring wells; and, the design and installation of a hydrocarbon recovery and
treatment system. The recovery system operated into the later months of 1984, when water levels
dropped to below the recovery well bottom.
The proprietorship of the station was relinquished to Texaco in early 1985. Various phases of
remediation were initiated after 1985 as well, by other consulting firms. These included product
recovery; in-sito bioremediation; and, carbon adsorption systems for treatment. Analytical data
obtained during the prior site activities indicated that contamination existed at the site in both the soil
and groundwater. This contamination has been reported as petroleum hydrocarbons as gasoline and
diesel, and from volatile aromatic hydrocarbons as benzene, toluene, ethylbenzene and xylenes. Based
on information provided by TES, no significant contamination was found in any of the groundwater
samples from 1990 through 1993. The lead regulatory agency, the Central Valley Regional Water
Quality Control Board, granted site closure on December 6, 1994.
2.2
Recent Environmental Work
In June 1995, all fuel dispensers and pump islands were replaced under permit number BI-0043, issued
by the BFD. ENV America staff collected representative soil samples beneath each dispenser. Each
sample was analyzed by a State-certified analytical laboratory for total petroleum hydrocarbons as
gasoline (TPH-G) or as diesel (TPH-D) by the California Department of Health Services (CADHS)
Method, and for benzene, toluene, ethylbenzene and xylenes (BTEX) using USEPA Method 8020.
Details of soil sampling methodologies are outlined in ENV America's August 1, 1995, "Report of Fuel
Dispenser Replacement."
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In order to remove as much impacted soil as possible, without undermining adjacent improvements,
remedial excavations were made at each pump island. Representative soil samples were collected from
the completed excavations to document remnant TPH/BTEX concentrations.
Beneath the western pump island, analytical data indicated that the maximum TPH concentration
detected in post-closure samples was 63 milligrams per kilogram (rog/kg) (diesel range). TPH-G Or
BTEX was not detected beneath the western pump island.
The maximum TPH concentrations detected.i~l~st-closure samples beneath the central pump island
were 7,500 mg/kg (gasoline range) and 1,200 mg/kg (diesel range). The maximum TPH
concentrations detected in post-closure samples beneath the eastern pump island were 17,000 rog/kg
(diesel range) and 790 mg/kg (gasoline range). Hence, residual TPH/BTEX concentrations beneath
the central and eastern pump islands prompted the BFD to issue the site assessment directive.
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3.0 GEOLOGIC AND HYDROGEOLOGIC SETTING
3.1 Geology
The site area is situated at the southern limits of the San Joaquin Valley, within the Great Valley
geomorphic province. The Great Valley is a relatively flat alluvial plain extending fi.om the Tehachapi
Mountains on the south to the Klamath Mountains to the noah, and from the Sierra Nevada Mountains
on the east to the Coast Ranges on the west.
The Great Valley is a downwarped structural trough, deeply infilled with sedimentary rocks. This
geosyncline has an asymmetric east-west profile as it rests on a long stable granitic Sierran slope on
the east, and valley sediments are steeply upturned on the west (Oakeshott, 1978). The sedimentary
sequence of the Great Valley lies unconformably on Paleozoic and Mesozoic metasediments and
volcanics, as well as Jurassic and Cretaceous granitic rocks (I-Iackel, 1966).
Sediments within the San Joaquin Valley range fi.om Jurassic to Recent in age. The pre-Quaternary
rocks are primarily of marine origin and are composed of siltstone, claystone and sandstone with
subordinate volcanics (Hackel, 1966). Within the site area, these sediments are estimated to extend
to about 10,000 feet below ground surface (bgs).
Pleistocene and Recent strata within the San Joaquin Valley are continental in origin, and generally
consist of granitic sands and conglomerates (Hackel, 1966). Within the site area, these alluvial
sediments were largely deposited by the ancestral Kern River, and were most likely derived fi.om
erosion of the Greenhorn Mountains to the east. Earth materials encountered during recent site work
primarily consist of unconsolidated sands. These sediments are classified as alluvial fan deposits
(Smith, 1964).
The sedimentary rocks of the San Joaquin Valley have been the source of vast quantities of petroleum
and natural gas (I-lackel, 1966). Most oil and gas production has been within the central and southern
portions of the valley. The San Joaquin Valley has also been the site of major land subsidence. Within
the subject portion of the valley, subsidence has primarily occurred south of the Bakersfield area
(Poland and Evenson, 1966). Subsidence has been caused by intense pumping of groundwater,
resulting in the lowering of the artesian head in deep confined aquifers.
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3.2 Hydrogeology
Unconfined groundwater occurs at about 15 feet bgs, as measured in groundwater Monitoring Well
MW-8 during dispenser replacement activities in June 1995. Monitoring Well MW-8 is located in the
southern portion of the site, as shown on Figure 2. The Kern River is located approximately 150 feet
to the northwest, and is estimated to affect the groundwater elevation beneath the site. Local
production water is derived from depths of about 250 to 400 feet bgs (Turner, K., personal
communication, 1995).
Natural groundwater recharge occurs by infiltration of rainwater and infiltration from streams and
rivers. Recharge is artificially enhanced via the Cross Valley Channel and the Callaway Weir, which
are located north of the site. Additionally, artificial recharge occurs from infiltration of irrigation water.
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4.0 FIELD INVESTIGATION
4.1 Overview
As previously indicated, the purpose of this investigation will be to define the extent of impacted soil
in the vicinity of the central and eastern pump islands. Due to physical restrictions such as the canopy,
and relatively shallow groundwater (15 feet bgs), the subsurface investigation will be performed by
hand augering methods, or alternatively by means of a limited-access drill rig.
A total of six borings is planned to be drilled. Three of the borings will be positioned adjacent to the
central pump island, and the other three will be located adjacent to the eastern pump island. Boring
locations are identified on Figure 3 - Boring Location Map. Boring locations, with respect to previous
soil sampling data, is further illustrated on Figure 4 - Soil Sample Location Map and Subsurface Profile
(Central Pump Island), and on Figure 5 - Soil Sample Location Map and Subsurface Profile (Eastern
Pump Island).
4.2 Field Work
4.2.1 Preliminary Activities
The proposed borehole locations will be pre-marked in white paint and Underground Service Alert
(Dig Alert) will be contacted to delineate proximal underground utilities. Once a drilling date is
scheduled, appropriate BFD staffwill be notified at least 72 hours before field wOrk begins. Prior to
the onset of field activities, a project-specific health and safety plan will be reviewed and signed by all
members of the field crew.
4.2.2 Drilling and Soil Sampling
Boreholes are anticipated to be advanced by means of a manually-rotated hand-auger set equipped with
a stainless steel bit. In the event a limited-access drill fig is utilized, drilling will be preceded by a
geophysical survey, and then boreholes will be advanced with hollow-stem augers. The borings will
be advanced until groundwater is encountered, estimated at about 15 feet bgs. Four of the borings,
HI, 1-12, H4, andH5 will be slant drilled toward the pump island at an approximate angle of about 20o
from vertical, in order to collect samples directly beneath the pump islands. The other two borings,
1t3 and H6, will be drilled vertically.
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Soil samples will be collected at minimum intervals of 5 feet, at the capillary fringe, and in zones
exhibiting field evidence of impact. Field evidence includes soil staining, noticeable odors, and vapor
readings on the organic vapor meter (OVM). Samples obtained during hand augering will be collected
with an 8.5-inch long, by 2.25-inch diameter, solid-spoon sampler containing two 3-inch long, 2-inch
diameter stainless steel or brass sample sleeves. The sampler will be manually driven into subsurface
soils with a slide hammer. In the event a drill rig is used, the boreholes will be post-hole dug to about
5 feet bgs, and samples will be collected with a California-modified, split-spoon sampler containing
three 6-inch long, 2-inch diameter brass sample sleeves. Soil will be logged in accordance with the
Unified Soil Classification System (USCS) by qualified staff working under the direct supervision of
a California-Registered Civil Engineer (R.C.E.) and a California-Certified Engineering Geologist
(C.E.G.).
Great care will be taken to prevent any vertical cross-contamination within the hand-augered boreholes.
The concern prompting this precaution is'that if impacted soil is present only at near-surface depths,
then impacted soil could potentially be transported downward via hand augering equipment to deeper,
non-impacted depths. Therefore, following the retrieval of the shallowest impacted sample, each
borehole may be reamed to a diameter of approximately 4.5 inches. Then, prior to advancing the
borings to greater depths, temporary casing consisting of sections of new or decontaminated 4-inch
diameter blank PVC casing will be placed in each boring. This precaution will significantly reduce the
potential for false-positive laboratory results and, in mm, will more accurately define the vertical extent
of impacted soil. The installation of casing is conceptually shown in Exhibit B - Hand Augering
Illustration.
Upon completion of drilling, the borehole cavities will be backfilled with bentonite chips and hydrated
with potable water. The upper 12 inches will be capped with rapid-set concrete.
4.2.3 Soil Sample Handling
Upon retrieval of each sample, the ends of the lead O.e., lowest) sample sleeve will be immediately
trimmed, covered with Teflon* sheeting and sealed with plastic end caps. The end caps will be secured
with silicone tape. The samples will be labeled, placed in resealable plastic bags and stored on ice in
a cooler, pending submittal to the analytical laboratory.
For each sample collected, field screening and monitoring for possible volatile organic compounds
(VOCs) will be conducted utilizing a Photovac I-IL-2000 OVM, calibrated to 50 parts per million
(ppm) hexane. The field screening method will consist of placing a desegregated soil sample from the
sampler shoe inside a resealable plastic bag, and placing it in the sun to accelerate volatilization. The
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Memo From:
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OVM probe will then be inserted through the bag to obtain a reading ofVOCs con6entrations in the
headspace.
4.2.4 Decontamination Procedures
Extreme care will be exercised to ensure adequate decontamination of all sampling and drilling
equipment. Decontamination of drilling and sampling equipment will be accomplished by washing
equipment in a non-phosphate detergent solution (Liqui-Nox) and triple rinsing in distilled water.
The sampler and sample sleeves will be decontaminated before each sample is collected. The hand-
auger bit and conductor casing will be decontaminated between each borehole. In the event a drill rig
is utilized, the drill rig will arrive with a sufficient amount of augers that were steam cleaned before
arrival to the site.
4.2.5 Waste Handling
All soil cuttings and decontamination rinsate water will be containerized in DOT-approved 55-gallon
drums. The drums will be labeled and stored onsite, pending analytical data. The contents of the soil-
filled drums will then be recycled at a licensed facility. The water-filled drums will be disposed at a
licensed treatment facility. Disposal sites will be designated by TES.
4.3
Laboratory Analyses of Soil Samples
All soil samples to be analyzed will be delivered under USEPA chain-of-custody procedures to BC
Analytical, a California Department of Health Services (CADHS)-certified analytical laboratory.
Samples collected at the central pump island will be analyzed for TPH-G using the CADHS Method,
and BTEX using USEPA Method 8020, since only gasoline dispensers were used at that island.
Samples collected at the eastern pump island will be analyzed for TPH-G, TPH-D and BTEX, as both
gasoline and diesel were dispensed at this island.
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4.4 Reporting
Upon completion of field work and laboratory analyses, a site assessment report will be compiled.
The report will conform to industry standards and will include a summary of previous
environmental work, details of drilling and soil sampling, results of laboratory analyses, and
appropriate conclusions and recommendations. As part of this report, boring logs, tabulated
laboratory data, appropriate scaled drawings and cross-sections, and original laboratory data
(including QA/QC documentation) will be included.
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5.0 LIMITATIONS
Information provided in this workplan is intended exclusively for Texaco Environmental Services
for the evaluation of petroleum hydrocarbons as they pertain to the subject site. The professional
services provided have been performed in accordance with practices generally accepted by other
scientists and engineers practicing in the geosciences. No other warranty, either expressed or
implied, is made. As with all subsurface investigations, there is no guarantee that the proposed
work will identify all or any of the sources or locations of contamination.
ENV America reserves the right to deviate from the proposed scope of work in order to gather
necessary information. In the event deviation of note is necessary, ENV America will attempt to
first notify the client and supervising regulatory agency.
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6.0 REFERENCES CITED
ENV America Incorporated, "Report of Fuel Dispenser Replacement," Texaco Service Station,
2401 North Oak Street, Bakersfield, California, August 1, 1995.
Hackel, O., "Summary of the Geology of the Great Valley," in Geology of Northern California:
California Division of Mines and Geology, Bulletin 190, 1966.
Oakeshott, G.B., "California's Changing Landscapes," McGraw-Hill Publishing Company, 1978.
Munger, A.H., "Munger Map Book, California - Alaska Oil and Gas Fields," Munger Map
Service, 1992.
Poland, J.F. and Evenson, R.E., "Hydrogeology and Land Subsidence, Great Central Valley,
California," in Geology of Northern California: California Division of Mines and Geology, Bulletin
190, 1966.
Smith, A.R.., "Geologic Map of California, Bakersfield Sheet," California Division of Mines and
Geology, 1964.
Turner, Ken., Kern County Water Agency, personal communication, July 17, 1995.
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FIGURES
===~---~~~~ ~-_ .... ~ .'~;~'-~~~--~h
. ~=~ . . ~ '~ '%: ~
. x ........... ',; ~ ~ ~ ~ ~ ~,p"n ' , , .
' ,', -~,. ', '. '' ' :":": >~d _ SITE
: 397" o "'o ' -I ~ ~ ~ .'::"':'~ ,
' o o , o ,0 . .~
',=~L~ o.,: ~,' ...~_.~'., ~ .?;'~ ~ I~" [ i~~~
0 2,000 4,000 FEET
APPROXIMATE
SCALE
FIGURE 1
/~~ SITB BOCA~ION NAP
REFERENCE:
7.5 MINUTE U.S.G.S. TOPOGRAPHIC MAPS OF OILDALE AND ~I~A TEXACO SERVICE STATION
GOSFORD, CALIFORNIA. BOTH MAPS DATED 1954 AND
PHOTOREVISED 1968.~ 2401 NORTH OAK STREET
ORIGINAL SCALE: 1 INCH = 2,000 FEET. BAKERSFIELD, CALIFORNIA
FENCED
~ ' BOUNDARY
/
0 40 80 FEET
I EXP~NATION I T J
~ APPROXIMAT[
SCALE
/ ~ EXISTING UST
FIGURE 2
~ ..... ~ FORMER UST LOCATION
L ..... J
i ~.oouc~ u.~ ~~ SITE PLAN
~ GROUNDWATER MONITORING WELL
MW-8
.I~. TEXACO SERVICE STATION
2401 NORTH OAK STREET
BAKERSFIELD, CALIFORNIA
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~ .~- I-~.sTERN ISLAND
~, H6
I
EXP~NATION
H6 PROPOSED VERTICAL
~ HAND AUGER BORING LOCATION 0 10 20 FEET
I I I
.s ~.o~os~o S~T ~P.OX,UAT~
~ HA.D AU~ BO~,~ LOCAr, O~ SC~
i ~ AP~OX,UAT~ L,U,TS OF
(:~:~:~:~) RE~ED~L EXCAVAT.ON FIGURE ~
~ (JUNE 95) ,
~ c,.o~ co~u.. ~~ BORING LOCATION
~ TEXACO SERVICE STATION
2401 NORTH OAK STREET
BAKERSFIELD. CALIFORNIA
ESTIMATED LIMITS OF CENTRAL ISLAND PLAN VIEW
SAW-CUT CONCRETE APPROXIMATE LIMITS OF
REMEDIAL EXCAVATION
H2~ /
D9EX-NE-7 (TPH-G 7 500) e~ . D9-3 . .
' ' ~' __ (TPH-G, 3,300) D7-3 (TPH-G, 4.4)
/~ D7-8 TPH-G, <0.5)
D9EX-NE-9 (TPH-G, <0.5). D9EX N 4~.~/ / ~TPH-D. <10)
~Z(TP"-~' ~'~)~ - .Z rSUBSURFACE
CANOPY ~L~,---- -- * .... ~7--~-- -- ~ .... -- IPROFIL[ LINE
.......... ...... .......
~ ~ J (TPH-G, 170) L~ · ~ ~ ~
FORMER .... ~ -- ~ -- -- ~ -- ~-- -- --~ ~-- ~
· PUMP IS~D 'mDgEX-NW-9 DgEx-w-7 ~~ -~ V
J (TPH-G 085~ (TPH-G 3000~ DgEX-B-IO.5~
r ...... ~ (~PH-~, ~,700) %
/ g (TPH-D, 1,200) ~
H1 H3
CENTRAL ISLAND SUBSURFACE PROFILE
H2
D9EX-B-B.5
(TPH-G, 170)
0
DgEX-N-4
(TPH-G, 7.1)
·
SP
SM
ML
PI
FOOTING L_
DgEX-N-4
-- :IPH-G. 7.1)
EXPLANATION
PROPOSED VERTICAL
BORING LOCATION
PROPOSED SLANT
BORING LOCATION
SOIL SAMPLE REPRESENTING
EXCAVATED SOIL SHOWING
TPH CONCENTRATIONS IN
rog/kg (D=DIESEL, G=GASOLINE
SOIL SAMPLE REPRESENTING
IN PLACE SOIL SHOWING
TPH CONCENTRATIONS IN
rog/kg (D=DIESEL, G=GASOLINE)
POORLY GRADED SAND
SILLY SANO
SILT
GAS
D9-3
0
(TPH-G, 3,300)
I ~
I ~o
I I
I I m_
I~ ~1.~~ __
(Tp'~D~i4~ I
OgEX-B-8.5
(TPH-cG, 170) /__~
'~ ogEX-B-IO.5
Ig zg: I:;§i
FORMER
PUMP ISLAND
-_-5
PIER
FOOTING
SM
SM
SM
)7-8 (.TPH-G, <0.5)
(TPH-D, <10)
APPROXIMATE LIMITS OF sP
REMEDIAL EXCAVATION
APPROXIMATE GROUNDWATER LEVEL
.~ ML
'~'-ML
FIGURE 4
SOIL SAMPLE LOCATION MAP
AND SUBSURFACE PROFILE
(CENTRAL PUMP ISLAND)
TEXACO SERVICE STATION
2401 NORTH OAK STREET
BAKERSFIELD, CALIFORNIA
0 5 10 FEET
APPROXIMATE
SCALE
EAST ISLAND PLAN VIEW
APPROXIMATE LIMITS OF
REMEDIAL EXCAVATION
015-3.59.(TPH-G' <0.5) D13EX-6 / H6~ 011-3'5011-8 (TPH-G,(TPH-G' <0.5)<0'5)
(TPH-G, <0.5) (TPH-D, 1,800)
D15EX-B- ~(TPH-D, 51) (TPH-G, 0,10)
\ / / (TPH-D, 1,100)
~ ,,"'""'~' -- /' "~ // ~ SUBSURFACE
~ ,~ 013-3.5 nn~ / IPROFILE LINE
/ ...... (TPH-D 87 000] ...... ~
..... T ....... .... T717 .... "'r ....... '
~ DIE EL CAS ~ ~ COLUMN
...... }x--
D13EX-B-lO.5 ~ J D 5E -S-9~ ~
(TPH-D, 130) ~ (TPH-D, 17,000) ~ ~ .....
(TPH-G, <0.5) ~ (TPH-G, 790) ~ PU~"~D
H4 H5
EAST ISLAND SUBSURFACE PROFILE
2'-
J==J>-z I
FOOTING "---?-~ D15-3.5
(TPH-G, <0.5
10'-
14'
SM
APPROXIMATE LIMITS OF/
REMEDIAL EXCAVATION
Ol~
(TPH-E
O15EXiB-9 (TPH-G, <0.5)~
(TPH-D. 51)~
EXPLANATION
H6
D13EX-6
(TPH-D, 1800)
0
015-15.5
(TPH-G, <0.5)
PROPOSED VERTICAL
BORING LOCATION
PROPOSED SLANT
BORING LOCATION
SOIL SAMPLE REPRESENTING
EXCAVATED SOIL SHOWING
TPH CONCENTRATIONS IN
rog/kg (D=DIESEL, G=GASOLINE
SOIL SAMPLE REPRESENTING
IN PLACE SOIL SHOWING
TPH CONCENTRATIONS IN
rog/kg (D=OIESEL, C=GASOLINE
SP POORLY GRADED SAND
SM SILTY SAND
ML SILT
DIESEL '~' GAS
D13-3.5
J-D, 87,000) ~ i
0
X-6
~ ,800)
v~'~' u~J FORMER
.~. PUMP ISLAND
__ PIER
FOOTING
D13EX-S-9
(TPH.-D, 1~
D13EX-B- 10.5
(TPH-D, 150)
(TPH-G, <0.5)
<0.5)
~011-~ (TPH-G, <0.5)
(TPH-D, 1,100)
APPROXIMATE GROUNDWATER
SM
LEVEL
-2'
-4'
-6'
-8'
-10'
12'
.14'
0 5 10 FEET
APPROXIMATE
SCALE
FIGURE 5
SOIL SAMPLE LOCATION MAP
AND SUBSURFACE PROFILE
(EASTERN PUMP ISI~ND)
TEXACO SERVICE STATION
2401 NORTH OAK STREET
BAKERSFIELD, CALIFORNIA
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BFD DIRECTIVE
SENT BY:TEXACO ITRMII Elias ; 9-14-95 ; 4:46PM ;TEXACO ENVIRON. $VC$-., 714 4.53 9292;# 2
of BAK~RSFIEZD FIRE .D~'PA RTMENT
I ~'lRl! S,! I:l!'l') SERV/¢:E.¢; ~; O/'FICE OF L:NVIRONMENT;~L SERVICES
i .,..~.~_~.:;....
lC.L. IIULY l~.[J.
(~0s~ ~.397,, August ~, 1995 ~) 32~ 3~.~
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Mr. Marcel Bauchez, Project Coordinator
Texaco Environmental Services
.10 Universal City Plaza, 7th Floor
Universal City, Ca 91608
RE:
Laboratory results from preliminary site assessment conducted at the
Texaco Service Station, 2401 Oak Street in Bakersfield California.
Permit #B1-0043
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Dear Mr. Bouchez:
Upon review of the recently submitted laboratory results from your facility, this
office has. determined that the extent of the contamination plume, associated with the
central, and east dispenser islands located on your property, has not been adequately
defined.
This office requires (in accordance with Chapter 6.7 of the Califomia Health' and.
Safety Code and Chapter 16, Title 23 of the California Code of Regulations) that further
assessment be done to define the vertical and horizontal extent of the contamination
plume.
Please submit a work plan for further assessment, to this office, within 30 days
~om receipt of this letter. The workplan should follow gu'idelines found in: Appendix A -
Reports. Tri - Re~lionai Board Staff. Recommendations for Preliminary evaluation and
Investigation of_ Underar.ound Tank Sitm; July 6, 1990.
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Additionally, be advised that oversight cost for this project will be billed to you at
a rate of $62.00 per hour.
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If you have any questions, please call me at (805) 326-3979.
Sincerely,
Howard H. Wines, III
Hazardous Materials Technician
HHW/dlm
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EXHIRIT B
HAND AUGERING ILLUSTRATION
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!
I ~-' HAND-AUGERING BIT
I
ILLUSTRATION
Texaco Refining
and ~arkefing ~nc
10 Universal City Plaza
Universal Citv CA 91608
May 29, 1996
ENV-SERVICE STATION
Limited Site Assessment Report
2401 North Oak Street
Bakersfield, CA
Mr. Howard Wines, III
Bakersfield City Fire Department
Hazardous Materials Division
1715 Chester Ave.
Bakersfield, CA 93301
Dear Mr. Wines:
Enclosed is a copy of the Limited Site Assessment Report for the
captioned Texado[facility. As described in the enclosed report, a
confined small diesel plume has been identified under a section of
the eastern-most pump island. The report also indicates that the
confined diesel plume does not appear to be impacting groundwater
beneath the site. Additionally, analytical results indicate that
no TPH or benzene constituents were discovered above Bakersfield
City Fire Department action levels for soil. Therefore, Texaco is
requesting case closure.
Should you have any questions or require additional information,
please call me at (818) 505-2739.
Sincerely,
Marcel L. Bouchez
Project Manager
Environment, Health & Safety
MLB:hs
p:\mlbkbakok2401arpt.bfd
Enclosure
pr: ~
Building on a Tradition of Quality
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F. NV
AIVERICA
ENVIRONMENTAL
ENGINEERING, CONSULTING
& CONSTRUCTION
AN ENERGY AMERICA COMPANY
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LIMITED SITE AssEssMENT REPORT
Texaco Service Station No. 61-058-1405
2401 North Oak Street
Bakersfield, California
Prepared For:
Texaco Refining and Marketing Inc.
Environment, Health and Safety Department
10 Universal City Plaza, 7th Floor
Universal City, California 91608-7812
(818) 50s-27s9
Texaco Job No. UMLB0636
Prepared By:
ENV America Incorporated
16 Technology, Suite 154
Irvine, California 92718
714-453-9191
FAX 714453-9292
ENV America Proje~ No. TEX-01-T043
May 22, 1996
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TABLE OF CONTENTS
1.0 INTRODUCTION ...................................................... 1
2.0 BACKGROUND INFORMATION ................................... ...... 2
2.1 Site History .................................................. .. 2
2.2 Recent Environmental Work ........................................ 3
3.0
4.0
GEOLOGIC AND HYDROGEOLOGIC SETTING ........................... 4
3.1 Geology .................... ................................... 4
3.2 Hydrogeology .................................................. 5
SUMMARY OF FIELD ACTIVITIES
4.1
4.2
4.3
4.4
4.5
Introduction .................................................... 6
Hand Augering and Soil Sampling 6
Field Screening of Soil Samples ..................................... 8
Groundwater Monitoring .......................................... 8
Waste Handling ................................................. 9
5.0 LABORATORY TESTING .............................................. 10
6.0 FINDINGS 11
7.0 LIMITATIONS AND PROFESSIONAL CERTWICATION ................... 12
8.0 REFERENCES CITED ................................................. 13
LIST OF TABLES
Table 1 Summary of Soil Sample Analyses
Table 2 Summary of Groundwater Sample Analyses
LIST OF FIGURES
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Site Location Map
Site Plan
Boring Location Map
Soil Sample Location Map and Subsurface Profile (~entral Pump Island)
Soil Sample Location Map and SubSUrface Profile (Eastern Pump Island)
Groundwater Contour Map
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TABLE OF CONTENTS
(Continued)
LIST OF EXHIBITS
Exhibit A
Exhibit B
Exhibit C
Exhibit D
Exhibit E
Exhibit F
Boring Logs
Hand Augering Illustration
Elevation Survey Data Sheet
Monitoring Well Purge and Sample Logs
Drum Disposal Records
Laboratory Reports and Chain-of-Custody ReCords
F:~.~)OC S~TEX~BAKRS FLD\TEX-T43. P~PT
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1.0 INTRODUCTION
ENV America Incorporated (ENV America) was.retained by Texaco Refining and Marketing Inc.,
Environment, Health and Safety Department (TRMI-EHS) to conduct limited site assessment
activities at the Texaco service station located at 2401 North Oak Street, Bakersfield, California..The
station, is situated on the northwest comer of the intersection of North Oak Street and 24th Street,
about 1,650 feet east of State Highway 99. The site location is indicated on Figure 1 - Site Location
Map.
The facility is an active Texaco service station with a station building and three pump islands. The
general layout of the site is shown on Figure 2 - Site Plan. Existing underground storage tanks
(USTs) include three containing gasoline, and one containing diesel.
The purposes of the activities conducted as part of this project were to further define the extent of
impacted soil in the vicinity of the central and eastern pump islands, and to evaluate groundwater
conditions. In general, the scope of services provided for .this project included the drilling and
sampling of six hand-auger borings; purging and sampling three groundwater monitoring wells; well
head elevation surveying; coordination of laboratory testing of soil and groundwater samples; data
analyses; and, preparation of this report. The following senrices were directly contracted by TRMI-
EHS: analytical laboratory testing of soil and groundwater samples by BC Analytical of Anaheim,
California; soil cuttings and rinsate water transportation and disposal services by Belshire
Environmental'Services of Lake Forest, California; soil recycling services by TPS Technologies of
Adelanto, California; and, recycling of rinsate water at the DeMenno Kerdoon facility in Compton,
Califomia.
F:~NVDOCS~TEX~BAKI~ FLD\TEX-T~3.P~I~
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2.0 BACKGROUND INFORMATION
2.1 Site History
Review of California and Alaska Oil Field Maps (Munger, 1992), reveals the western portion of the
site was once occupied by an unCOmpleted and abandoned Chevron oil well described as "Chevron
KCL-5, 30-6879, No. 4." Details, descriptions and the exact location of the well were not available
as of this writing.
Based on information provided by TexaCO, the subject set-vice station was originally operated as a
Mohawk s~h~ice station by the Getty Oil Company thrOugh early 1985. Fuel from leaking USTs and
piping was first encountered in 1983. Previous investigations and remediation activities at the site
included removal of defective leaking fuel USTs; installation of groundwater monitoring wells; and,
the design and installation of a hydrocarbon recovery and treatment system. The recovery system
operated into the latter months of 1984, when Water levels dropped to below the recovery well
bottom.
The proprietorship of the station was relinquished to Texaco in early 1985. Various phases of
remediation were initiated a~er 1985 as well, by other consulting firms. These included product
recovery; in-sim bioremediation; and, carbon, adsorption systems for'treatment. Analytical data
obtained during the prior site activities indicated that contamination existed at the site in both the soil
and groundwater. This COntamination has been reported as petroleum hydrocarbons as gasoline and
diesel, and from volatile aromatic hydrocarbons as benzene, toluene, ethylbenZene and xylenes.
Based on infOrmation provided by TexaCO, no significant COntamination was found in any of the
groundwater samples from March 1990 through 1993. However, it was noted that impacted soil
appeared to remain above the water table. The lead regulatory agency, the Central Valley Regional
Water Quality Control Board, granted site closure on December 6, 1994.
F:~NVDOC~TEX~AKI~FLD\TEX-T43.RPT
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2.2
Recent Environmental WOrk
In June 1995, all fuel. dispensers and pump islands were replaced under permit number BI-0043,
issued by the Bakersfield Fire Department. ENV'America staff collected representative soil samples
beneath each dispenser. Each sample was analyzed by a State-certified analytical laboratory for total
petroleum hydrocarbons as gasoline (TPH-G) or as diesel (TPI-I-D) by the California Department. of
Health Services (CADHS) Method, and for benzene, toluene, ethylbenzene and xylenes (BTEX)
using USEPAMethod 8020. Details of soil sampling methodologies are outlined in ENV America's
August 1, 1995, "Report of Fuel Dispenser Replacement.".
In order to remove as much impacted soil as possible, without undermining adjacent improvements,
remedial excavations were made at each pump island.- Representative soil samples were collected
from the completed excavations to document remnant TPH/BTEX concentrations.
Beneath the western pump island, analytical data indicated that the maximum TPH concentration
detected in post-closure samples was 63 milligrams per kilogram (mt/kg) (diesel range). TPH-G or
BTEX was not detected beneath the western pump island.
The maximum TPH concenlrations detected in post-closure samples beneath the central pump island
were 7,500 mt/kg (gasoline range) and 1,200 mgP~g (diesel range). The maximum TPH
concentrations detected in post-closure samples beneath the eastern pump island were 17,000 mt/kg
(diesel range) and '790 mt/kg (gasoline range).
F .'kl~r VIX~,?~'i'P21kBAKI~PLD~,TEX-Ta3.Ri~
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3.0 GEOLOGIC AND HYDROGEOLOGIC SETTING
3.1 Geology
The site area is situated at the southern limits of the San Joaquin Valley, within the Great Valley
geomorphic province. The Great Valley is a relatively flat alluvial plain extending from the Tehachapi
Mountains on the south to the Klamath Mountains to the north, and from the Sierra Nevada
Mountains on the east to the Coast Ranges on the'west.
The Great Valley is a downwarped structural trough, deeply infiiled with sedimentary rocks. This
geosyncline has an asymmetric east-west profile as it rests on a long stable granitic Sierran slope on
the east, and valley sediments are Steeply upturned on the west (Oakeshott, 1978). The sedimentary
sequence of the Great Valley lies unconformably on Paleozoic and Mesozoic metasediments and
volcanics, as well as Jurassic and Cretaceous granitic rocks (I-Iackel, 1966).
Sediments within the San loaquin Valley range from Jurassic to Recent in age. The pre-Quaternary
rocks are primarily of marine origin and are composed of siltstone, .claystone and sandstone with
subordinate volcanics (Hackel, 1966). Within the site area, these sediments are estimated to extend
to about 10,000 feet below ground surface Cogs). '
Pldstocene and Recent strata within the San loaquin Valley are continental in origin, and generally
consist of granitic sands and conglomerates (I-Iackel, 1966). Within the site area, these alluvial
sediments were largely deposited by the ancestral Kern River, and were most likely derived from
erosion of the Greenhorn Mountains to the east. Earth materials encountered during recent site work
primarily consist of unconsolidated sands.~ These sediments are classified as alluvial fan, deposits
· (Sn~th, 1964).
The sedimenta~ rocks of the San Joaquin Valley have been the source of vast quantities of petroleum
and natural gas (Hackel, '1966). Most oil and gas production has been within the central and southern
portions of the valley. The San Joaquin Valley has also been the site of major land subsidence.
Within the Subject portion of the valley, subsidence has primarily occurred southof the Bakersfield
area (Poland and Even,son, 1966). Subsidence has been caused by intense pumping of groundwater,
resulting in the lowering of the artesian head in deep confined aquifers.
sw 4
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Hydrogeology
Based on groundwater elevation monitoring on April $; 1996, groundwater currently exists at about
27 feet bgs, and the groUndwater flow direction is generally to the southwest. In June 1995,
groundwater beneath the site was gauged at about 15 feet bgs (ENV America, Augg. st 1995). Based
on known site conditions, the groundwater is estimated to be unconfined.
The Kern River is located approximately t50 feet to'the northwest, and is estimated to affect the
groundwater elevation beneath the site; Local production water is derived from depths of about 250
to 400 feet bgs (Turner, K., personal communication, 1995).
Natural groundwater recharge occurs by infiltration of rainwater and infiltration from streams and
rivers. Recharge is artificially enhanced via the Cross Valley Channel and the Callaway Weir, which
are located north of the site. Additionally, artificial recharge occurs from infiltration of irrigation
water.
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4.0 SUMMARY OF FIELD ACTIVITIES
4.1 Introduction
As indicated above, the purposes of this investigation were to define the extent of impacted soil in
the vicinity of the central and eastem pump islands, and to evaluate groundwater conditions.' In order
to accomplish these goals, six hand-auger borings were advanced adjacent to the pump islands, and
three groundwater' monitoring wells were purged and sampled. Hand-auger boring locatiOns,
groundwater monitoring well locations; and otherpertinent site data are shown on Figure 3 '- Boring
Location Map.
Field work was conducted on April 8 and 9, 1996, and was performed in accordance with ENV
America's "Workplan for Limited Site Assessment" and "Workplan Addendum," dated September
29, 1995, and iIanuary 23, 1996, respectively.
4.2
Hand Augering and Soil Sampling
Prior to the onset of field activities, Underground Service Alert (Dig Alert) was contacted to locate
all underground utilities within the general work area. At the commencement of field activities, a
tailgate safety meeting was held onsite to outline the day's activities and to identify potential hazards.
During the meeting, a' site- and project-specific health and safety plan was reviewed and discussed
with all members of the field crew. '
All hand-auger borings were advanced by means of a manually-rotated hand-auger set equipped with
a stainless steel bit. The borings were advanced until refusal, at about 18 feet bgs. Four. of the
borings, H1, H2, H4 and H5 were slant drilled toward the respective pump island at an approximate
angle of about 20° from vertical, in order to collect samples directly beneath the pump islands. The
other two borings, H3 and H6, were drilled vertically..
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Soil samples were generally collected at S-feet intervals with an 8.S-inch long, by 2.2S-inch diameter,
solid-spoon sampler containing two 3-inch long, 2-inch diameter brass sample sleeves. The sampler
was manually driven into subsurface soils with a slide hammer. Between each sample drive, the
sampler and brass sample sleeves were washed in a non-phosphate detergent solution (Liqui-Nox)
and double-rinsed in distilled water to prevent cross-contaminatio~ Upon retrieval of each sample,
the ends of the lead (i.e., the lowest) brass sample sleeve were covered with Teflon® sheeting, sealed
with plastic end caps, and secured with silicone tape. The samples were labeled, placed in resealable
plastic bags, and stored on ice in a cooler pending submittal to the laboratory. Samples were
submitted under strict chain-of-custody procedures to a State-certified analytical laboratory for
allalyse$.
Earth materials encountered during hand augering were logged in accordance with the Unified Soil
Classification System (USCS) by a California-Certified Engineering Geologist (C.E.G.). Detailed
descriptions of the soil types encountered during drilling are included in Exhibit A - Boring Logs.
The relative position of the borings and soil samples, are schematically illustrated in plan view and
in cross-sectional view on Figure 4 - Soil Sample Location Map and Subsurface Profile (Central
Pump Island), and on Figure 5 - Soil Sample Location Map and Subsurface Profile (Eastern Pump
Island).
Great care was exercised to prevent any vertical cross-contamination within the hand-augered
boreholes. The concern prompting this precaution was that if impacted soil existed at near-surface
depths only, then impacted soil couldpotentiaHy: be transported, downward via hand augering
equipment to deeper, non-impacted depths. Therefore, following the retrieval of the shallowest
impacted sample, each borehole was reamed to a diameter of approximately 4.5 inches. Then, prior
to advancing the borings to greater depths, temporary casing consisting of sections of new 4-inch
diameter blank PVC casing was placed in each boring. This precaution significantly reduced the
potential for false-positive laboratory results and, in turn, more accurately defined the vertical extent
of impacted soil. The installation of casing is conceptually shown in Exhibit B - Hand Augering
l~lustration.
Upon completion of drilling the borehole cavities were backfil!ed with bentonite chips and hydrated.
with potable water. The upper 12 inches was capped with rapid-set concrete.
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4.3
Field Screening of Soil Samples
For each sample collected, field screening and monitoring for possible volatile organic compounds
(VOCs) were conducted utilizing a Photovac HL-2000 organic vapor meter (OVM). The'Photovac
OVM utilizes photoionizafion to detect VOCs.
The field screening method consisted of placing a desegregated soil sample from the samPler shoe
inside a resealable plastic ball and placing it in the sun to accelerate'vola '~tion: The OVM probe
was then inserted through the bag to obtain a reading of VOCs concentrations in the head-space.
These readings were recorded on each boring log (Exhibit A). Ambient air at the breathing level was'
also monitored for health and safety purposes.,
4.4
Groundwater Monitoring.
The top of the well casings (TOCs) of three onsite groundwater monitoring wells (C7, 4A and C8)
were surveyed relative to a temporary benchmark (TBM), with a W-fidTM Automatic Level. Field
records of the survey are included'in Exhibit C - Elevation Survey Data Sheet.
The depth to groundwater in each of the three wells was gauged with a SolinstTM water-level
sounder. The submerged portion of the Water-level sotuder was washed in a Liqui-Nox solution and
double-rinsed with distilled water between measurements. The TOCs served as reference points from -
which groundwater levels were measured..The recorded depth to groundwater in each well is
included in Exhibit D - Monitoring Well Purge and Sample Logs.
Each groundwater monitoring well was then purged manually by means of a pVC bailer. Purging
continued until at least 3 well casing volumes had been removed and water quality parameters (pH,
temperature, and electrical conduCtivity) stabilized. Details of well purging and sampling,, including
the amount of water removed and water quality measurements, are included in Exhibit D. The water
generated by purging was stored onsite in Department of Transportation (DOT)-approved drums,
pending laboratory analyses and disposal arrangements.
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Once purged wells had recovered to at least $0 percent of their original volume, groundwater samples
from each well were collected using a new 1-inch diameter disposable polyethylene bailer. The water
was slowly decanted into laboratory-supplied 40-milliliter (ml) glass vials. The vials were labeled and
stored on ice in a cooler until delivery to the laboratory. In order to avoid cross-contamination
between wells, all sampling equipment, including bailers, string and gloves, was dedicated to each
well and discarded upon collection of each sample.
Groundwater elevations measured during this monitoring event were used to calculate a groundwater
flow direction and hydraulic gradient. GrOundwater flow beneath the site is to the southwest at an
approximate hydraulic gradient of about 0.015 feet per foot (fi/fi), based on the data collected on
April 9, 1996. Groundwater flow is schematically illustrated on Figure 6 ~ Groundwater. Contour
Map.
4.5 Waste Handling
Soil cuttings, decontamin~'on rinsate, and purged groundwater generated as a result of drilling, and
sampling activities were placed in DOT-approved 55-gallon drams. A total of 2 soB-filled drams and
2 water-filled drums were generated. The soil-filled drums were subsequently transported as
nonhazardous waste and thermally treated at the TPS Technologies facility in Adelanto, California.
The rinsate water-filled drums were treated at the DeMenno Kerdoon recycling facility in Compton,
california. TranspOrtation and disposal were COOrdinated by Belshire Environmental of Lake Forest,~
California. Records of waste disposal are included in Exhibit E - Drum Disposal Records.
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5.0 LABORATORY TESTING
All soil and groundwater, samples were delivered to BC Analytical, a California Environmental
Protection AgenCY (Cal/EPA)-certified analyti, cal laboratory located in Anaheim, California. All soil
samples collected at the eastern pump island were analyzed for TPH-G, TPH-D and BTEX, as
gasoline and diesel have both been dispensed at that island. Ail soil samples collected at the central
pump island were analyzed for TPH-G and BiTEX, since only gasoline was dispensed at that island.
Additionally, the two deepest samples l~om H1. (at 15 and 18 feet bgs), located near the central island,
were also analyzed for TPH-D..The groundwater samples were analyzed for TPH-G, TPH-D, and
BTEX.
BTEX was not encountered in any soil sample analyzed. In the'vicinity of the central pump island,
TPH-G and TPH-D were detected in soil at maximum concentrations of 6.1 mg/kg and 13 mg/kg,
respectively. At the eastern pump island, ~'PH-G and TPH-D were detected in soil at maximum
concentrations of 2.8 rog/kg and 1,400 mg/k~ respectively.
In ' 1 TPH TPH.DI. I 1
the groundwater samp es, -G, ' I' to uene, ethy benzene or xylenes were not detected.
Benzene was detected at a maximum concentration of 4.2 micrograms per liter (tzg/l) in the
groundwater sample f~om Groundwater Mohitoring Well
Laboratory. results are tabulated in Table 1 - Sununary of Soil Sample Analyses, and in Table 2 -
Summary of Groundwater Sample Analyses..C, omplete laboratory reports are included in Exhibit F -
Laboratory Reports and Chain-of-Custody Records.
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6.0 FIND1~GS
Based on the results of laboratory analyses of soil samples collectedin Hand-Auger Borings HI,.
H2, and H3, the gasoline and diesel impacted soil detected in the remedial excavation at the
central pump island in June of 1995 is an extremely localized pocket.
At the eastern pump island, impacted soil appears to be limited to diesel fuel. The extent of
impacted soil at the eastern pump island is also relatively localized, in that appreciable
concentrations of TPH-D were only detected in two of. three proximal borings.~..
The relativdy low concentrations of benzene detected in groundwater samples are not necessarily
related to either of the pump islands investigated as part of this project. The benzene could
represent residual impact associated with earlier remedial efforts.
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7.0 LIMITATIONS AND PROFESSIONAL CERTIFICATION
This report is intended exclusively for TRMI-EI-IS for the evaluation of petroleum hydrocarbon
impact as it pertains to the subject site. The professiOnal services provided have been performed in
accordance with other scientists and in the
practices
generally
accepted
by
engineers
practicing
geosciences. No other warranty, either expressed or implied, is made. As with all environmental
projects, there is no guarantee that the work performed has identified all or any of the sources or
locations of impact. This report is issued with the understanding that TRMI-EHS is responsible for
ensuring that the information, contained herein is., brought to the attention of the appropriate
regulatory agency.
The following ENV America professionals were responsible for all work associated with this project
within the purview of the Professional Engineers' Act and Registered Geologist, and Geophysicist Act
of the California Code of Regulations.
Daniel I. Gifford, C.E.G.
Manager of Geoscience
C.E.G. No. 1959
S. "Sean" Shahin, P.E.
Principal
P.E. No. C 042940
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8.0 REFERENCES CITED
ENV America Incorporated, "Workplan Addendum," Texaco Sera, ice Station, 2401 North Oak
Street, Bakersfield, California, January 23, 1996.
ENV America Incorporated, "Workplan for Limited Site Assessment," Texaco Service Station,
2401 North Oak Street, Bakersfield, California, September 29, 1995.
ENV America Incorporated, "Report of Fuel-Dispenser Replacement,"=Texaco Service Station,
2401 North Oak Street, Bakersfield; California, August 1, 1995.
Hackel, O., "Summary of the Geology of the Great Valley,"/n Geology of Northern California:
California Division oflvfmes and Geology, Bulletin 190, 1966.
Oakeshott, G.B., "California's Changing Landscapes," McGraw-Hill PubLishing Company, 1978.
Munger, A~H., "Munger Map BoOk, California - Alaska Oil and Gas Fields," Munger Map
Service, 1992.
Poland, J.F. and Evenson, I~E., "Hydrogeology and Land Subsidence, Great Central Valley,
California,"/__n Geology of Northern California: CaLifornia Division oflVfines and Geology, Bulletin
190, 1966.
Smith,/~1~, "Geologic Map of California, Bakersfield Sheet," California Division oflvlines and
Geology, 1964.
. Turner, Ken., Kern County Water Agency, personal communication, July 17, 1995.
aw 13
F:'~I~VI:K:)CSX~PLD\TE~-T~3.1~oF
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TABLES
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TABLE 1
SUMMARY OF SOIL SAMPLE ANALYSES
Texaco Service Station
2401 North Oak Street
Bakersfield, California
ENVAmer~a Projecl No. TEX=O1-T04$
Dates Sampled: April 8 and 9~ 1996
CENTRAL PUMI' ISLAND ARF_,A
H1-5 5 <0.05 NA ~.~5 ~.~5 ~.~5 ~.01
H~-l~ ~2 1.7 NA <0.~5 ~.~5 ~.~5 ~.01
Hi-~ ~ · 0.20 <10 ~.~ ~.~ ~.~ ~.01
HI4S ~ 0~2 13 ~.~ ~.~ ~.~ ~.0~
~-5 5 <0.05 NA <0.~5 ~.005 ~.~S ~.01
~-10 10 ~.05 NA ~.~5 ' ~.~5 ~.~5 ~.01
~-1 g 18 <0.05 NA ~.~5 ~.~5 ~.~5 ~.01
~-5 5 1.0 NA (0.~5 ~.~5 ~.~5 ~.01
~-10 10 6.1 NA ~.01 ~.01 ~.01 ~.02
~-15 15 ~.05 NA ~.~5 ~.~5 ~.~5 ~.01
H~5 5 ~.05 <10 ~.~5 ~.~5 ~.~5 ~.01
H~I0 l0 <0.05 <10 <0.~5 ~.~5 ~.~5 ~.01
Ill. Ii 18 <0.05 <10 ~.~5 ~.~5 ~.~5 ~.01
H5-5 5 <0.05 <10 ~.~5 ~.~5 . ~.~5 ~.01
H5-10 10 <0.05 <10 ~.~5 ~.~5 ~.~5 ~.01
H5-15 1~ 0.48 ~ ~.~5 ~.~5 ~.~5 ~.01
H~5 5 ~.05 (10 ~.~5 ~.~5 ~.~5 ~.01
u~o ~o <o.o~ ~o ~.~ ~.~ ~.~s ~.o~
H6-18 18 '0~6 1,100 _ ~.~ ~.~ ~.m~ ~.0~
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Q~Qc: ~
DATE: -' $1~i1'~ (.
E'~ENVI:)OC~TEX~.MO~FLD~T43HND-A. Ti
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TABLE 2
SUMMARY OF GROUNDWATER SAMPLE ANALYSES
'Texaco Service Station
2401 North Oak Street
Bakersfield, California
£NV America Pr oject No. T£X-O1- T045
Date Sampled: April 9, 1996
C7 <100. <l 0.92 <0.3 <0.3 <0.6
Ci <100 <1 2.9 <0.3 <0.3 <0.6
4A <100 <l 4.2 <0.3' <0.3 <0.6
! TB//60312 <100 NA i<0.3 <0.3 <0.3 <0.6
::::::::::::::::::::::::::::::::::::::::::::::::: ...................... ~::::::::::~ ~ ~i ii 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:
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QA/QC: ~ .
DATE: ~ I'~ I'~_
F:~'4VDOC~TE X~ F~ D\T, J3G DWTI~ T2
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FIGURES
0 2,000 4,000
FIGURE 1
~~__ SITE LOCATION MAP
REFERENCE:
SERVICE
STATION
OOSFORD, CALIFORNIA. BOTH MAPS DATED 1954 AND
2401 NORTH OAK STREET
PHOTOR~ISED 1968.
ORIGINAL SCALE: 1 INCH = 2,000 FE~. BAKERSFIELD, CALIFORNIA
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EXPLANATION
! ..... \ EXISTING UST
\
FORMER UST LOCATION
............. PRODUCT UNE
o 40
..... APPROXIMATE
SCALE
80 FEET
I
FIGURE 2
SITE PLAN
TEXACO SERVICE STATION
2401 NORTH OAK STREET
BAKERSFIELD, CALIFORNIA
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STATION
OFFICE
EXPLANATION
H6
H5
VERTICAL HAND AUGER
BORING LOCATION (APRIL 1996)
SLAN:I' HAND-AUGER
BORING LOCATION (APRIL 1996)
APROXIMATE LIMITS OF
REMEDIAL EXCAVATION
(JUNE 95)
CANOPY COLUMN
FORMER DISPENSER
IDENTIRCA~ON
Hi(
CENTRAL ISLAND
SEE FIGURE 4
I~ H5
,,E 'ERN ISLAND
FIGURE 5
H4
H5(~ ~
/
/
/
/
/
/
/
0 ' 10 20 FEET
APPROXIMATE
SCALE
FIGURE
BORING LOCATION MAp
TEXACO SERVICE STATION
2401 NORTH OAK STREET
BAKERSFIELD, CALIFORNIA
CENTRAL ISLAND PLAN VIEW
DEPTH TPN-G
5 ~ 1.0
10 6.1
1.5 <0,05
18 O.OB1
APPROXIMATE UUl'rS OF FORMER
REMEDIAL EXCAVATION ' ·
H3 / / (TPH-O, 0.32) '
/ /
DgEX-NE-7 (~PH-C~ 7,$00).e~'""~ / / (TPH-O, 0.20)
/ ,%__ /r / (TPH--D. <10)
. .... --~'-~ ~)-' '~/.- -/-/-/- - - - -.- ::.- '
/'oeex a &5 ~ '",Z / / '. '- /PROnU~
'""' ~, / ('~--G, 1,7)J ~ '~ . GAS '~ ~ CANOPY COLUMN
~N-O. 0.~) ~,-0. ~.000:~#~~ '¥.~P,-0` <O.OS~ ~07-~ ~TP,-O. <0`5)
" ~k ~:~: ;:~ ~ ....... (T.-O,
H1 ~C, <0.5) H2
01.
21.
t
12'-
20~.
24~-
CENTRAL ISLAND SUBSURFACE PROFILE
PiER·
FOOTING
I I
--I----
D9EX-N-4
-- (~m-~ o,s3)
APPROXIMATE GROUNDWATER
<0.081)
APPROXIMATE GROUNDWATER
FORMER
OAS
(TPH-O. <0.05)
FORMER
I
!
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PIER
FOOTINO
SM ~ML
SM
,'TPH-O, <0.05)
<0,5)
<10)
~PH -0,
(T~-O.
~PH-D, 15)
0,5
(TPH-O. 1,700)
'~.2oo)
APPROXIMATE LIMITS OF
REMEDIAL EXCAVATION
(TPH-O, <0.05)
H-~ 0.051)
('rPH-O, < 0.0`~)
SP
SP
-0'
-2'
-4'
'6'
-8'
'12' ~
bJ
'1-
· 18'
'22'
H~
H2
DgEX-N-4
(TPH-G, 7.1)
SP
ML
SM
EXPLANATION
VERTICAL BORINO LC~a~TION
SLANT BORING LOCKnON
SOIL ,~N~tPLE R£PRE~ENTINO
IN PLACE SOIL SHOW1NO
TPH CONCENTRATIONS IN
m;/kg (D=OIESEL, G=G~OUNE
POORLY DRADED SAND
SILT
SILTY SAND
SOIL
AND
10 FEET
FIGURE 4
SAMP!,E LOCATION MAP
SUBSURFACE PROFILE
(C~HTRAL PUMP ISLAND)
TEXACO SERVICE STATION
2401 NORTH OAK STREET
BAKERSFIELD, CALIFORNIA
~I~ . EAST ISLAND PLAN VIEW
~~ APPROXIMATE LIMITS OF FORMER ~ 10 <0.05 880
~ ~PH-g, <0.05)~ ~ D11-5.5 ~PH-G, <0.5) '
gPH-D, <10) ~ ~_ ~ ,. ' 011-8 .~H-G, <0.5)
'~ D15-3,5 (TPH-~, <0,5) __ ~ ~ _ .~ FPH-D, 1,100) --SUBSURF~E
~J D15EX-B-9 (TPH-G (0.5) ~ -- -- ~ ~ ~ ~H-G, <0,05) ~ ....... ~ PROFILE LINE
· (TPH-k 51) ~ ~ ~PH-D, 22) t ~P.-~. Z.S); q".-O, ~,~)
............. ¢ ..... .... ....... ......
FORMER J' ~ .................~~~ ~ ~ ~-- ~ H-D 2
~' ' ' ~ ~ 0,,-o. ~7.ooo) ~ ~,,_~. <o.os)
~PH-g, <0.05) H4 ~PH-D, <10) ~
~-D. <m) H5
EAST ISLAND SUBSURFACE PROFILE
; FORMER FORMER FORMER
~ I I I I FORMER
PUMP IS~ND
~ I I I I _1 I ~
o ' W2 .......... w -- [ ---~o
~' ~,~ ~,-o. <~* ~/ ..'~
4
6' REMED~ ~VATtON j ~ J J
/ /~ / ~PH-D, <10) i
14- ~PROXi~TE G~UNDWATER ~__ ~H-G, <0.05)~ ~ n n4.~
16-
~H-D, 1,1~)
20- - 20
SP
22 ' - 22
24 - · 24
APP~XI~TE OROUNDWATE~
L~L ON 4/9/96
26 - ~- 26
DEPTH TPH-G TPH-D
5 <0.05 <10
10 <0.05 880
15 0.31 1,400
18 0.56 1,100
EXPLANATION
H6
(~ VERTICAL BORING LOCATION
H5 0 5 10 FEET
~ SLANT BORING LOCATION I I I
D13EX-6 SOiL SAMPLE REPRESEhrTINO AP SI:~dATE
(TPH-D, 1800) EXCAVATED SOIL SHOWINO
0 TPH CONCENTRATIONS IN
rog/kg (D=DIESEL, G=GASOLINE)
D15-15.5 SOIL SAMPLE REPRESENTING FIGURE 5
(TPH-G, <0,5) IN PLACE SOIL SHOWING ~
· TPH CONCENTRATIONS IN
rog/kg (D'DIESEL. O-OASOLINE) SOIL SAMPLE LOCATION MAP
Sp POORLY ORAD[DSAND ~~ AND SUBSURFACE PROFILE
(EASTERN PUMP ISLAND)
(~P POORLY GRADED GRAVEL ~
I ~/4~]~ll~mll TEXACO SERVICE STATION
2401 NORTH OAK STREET
BAKERSFIELD, CALIFORNIA
~.~ I ., ~,~
~ c~ '
EXP~NATION
c~ .o.,~o.,.~ w~ ~.ow,.~
o.ou.~w~.~. ~,o.
/ ~ EXISTING UST
FIGURE 6
C ....... ~ FORMER UST LO~TION
~ ....... j GROUNDWATER
i~[ I CONTOUR MAP
............. ~o~cx u,~ (APRIL 9, 1996)
EL~ATION). D~HED WHERE EXT~PO~T[D ~l~~ TEXACO SERVICE STATION
2401 NORTH OAK STREET
BAKERSFIELD, CALIFORNIA
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EXHIBIT A'
BORING LOGS
I
BORING LOG
BVV (DRILLED AT 20° FROM VERTICAL)
I H 1 ....
tBACKFILL DETAIL LIIHOLOGY TEST DATA
epth O~
G~PHIC DESCRIPTION Somple ID./ R~odi~g
(feet) LOG Time ~ppm)
:~':~':~[I~'~ ,',~'u:t:".'~, 6 ;~h concrete
~.~:~ ........... ,.,,:.~..~
2 "llll~[llll~ 2 ~,.7"d";~:(:: moist. ~ium d~., no ~. no stolnin~. 2
,1111 ~ IIIII ~ .~,, ,.., , ~o (sP). ~c~ fine to ~ium ~in~. ~ist. ~ium
· . ':,~ .;;~ .,:: ~:2
[l~l ~ ~JJll ~ ::":.",: .",v::. ~D (SP). m~um oronge bm~n. fine to m~ium groin. ,.
~ IIII ~ IIII ..... .:.,,:..., ~... .,: m~st. medium ~se, no ~. ~ staining.
-- --
~[[~ II~]~ 5 '.~':~'~:~'f'.:'~ ~D (SP). m~;uffi orange brown, fine to m~ium gro;~. 5
1111 ~ IIII ~ ~0~
7 ~ IIII ~ IIII "'. ".;,"
~ Iltl ~ LIIII ~ 7 ¥:..:::,,.:,.,.,.: 7
~ 11111 ~ IIII '. :;...5::~:.,. ~...:
~1111 ~ [111t ~ s I:'.',,'..,..% ,..~; s
illll ~ II11~ m ;':...r:'.: :.... :~
~ 1~ ~O (SP), I~ht to ~;um ~wn, ~dlum to c~ I0
~ IIII] no r~.
~ ~ IIIII ~ · 2 graln~, d~ to damp, ~n~, f~b~, ~ ~e~, ~
_IIIII ~ z.. ;.~..:.?~:' ~. ao2o
ffi ~ IIIJ a ~ ::/.: 4..:.4:.::,
· ~1111 ~ 15 ';~C/:-'['~' ?'j":~0 (SP), liqht brown, medium to c~ ~raln~, d~ to 15
~[~l~] ~ -- ~::~{"':.':'2~["~:'"::~" ?~,[47.:~ ;' sto;nin~.d°mp' ~n~, sl;ght~ fdob~, m;c~us, sr~ht ~or, ~ -- H1-15/ ~ 46
,.;';., % ."*' C" 1
~1111~ --
~ -- ).?-??¥:.'q'.~ ~O (SP), ~gh[ oron~e brown, fine to m~;um groin~
~1~ ~l 3.~' I~ 1~ TOT~ BORING LENG~
18.5 FE~
I
teStatiC: 4/8/96 Drilli~ Meth~: ~O ~GER
~ ~mp~ted: 4/8/g6"
S~n ~mpler 10: D INCH
L~g~ ~ JIM ~D, C.E.G. Sompler Ty~: CORE ~P~R
~pm~ By: ~ GIFFORD, C.E.O ~: .
OTE: ~ Rgure 5 for ~rlng I~oUon. ~te:
~PROJECT NAME: TEXACO STATION, BAKERSFIELD. CA PROJECT NO: TEX-O1-T043
BORING LOG
~1~ HAND AUGER BORING
BVV (DRILLED AT 20° FROM VERTICAL)
H2
BACKFILL DETAIL LITHOLOGY TEST DATA
I Depth ' OVM
· GRAPHIC DESCRIPTION Somple ID./ R, eo din, g
(feet) LO(; Time
--1EIIIIIII~"~'"" ~ ~ --1 ]':i'-?~'.~:'i'~."!'~';!' molst.SAND (SP).dense.mediUmno odor.Or°ngeno ,to;ning.br°wn' fine to medium ;roined. __1
I[
0.0
· 111~ IIIII -------- ::.,.::.~,:..: :..:. .
IIl~lllllli_=-- I111[ '"..".~,'. ":'.
I1~11111 -~IIIII .... '~ :", '."
...,...,.;... ~.~, ',,~
~ IIl~llllll --- IIII ~
o IIIEE~ ~.~o ..~'.,.?~.~.[..:?:.. SAND ($P), ligh[ brown, medium ~rolned. dry to domp. 10 -
~ ~ [J[[ ~ ...:.;,.., :!.,, .::.', ...:.
l~ ,../'.;/:, ..4..'..~ '.'
3 ~ 13 ' ,. ",' .".',../
EIIIIII ~ ,,.'...:...... ,
-- -- '?:'¥:'¥':'!'":':SANo (SP). light brown, medium ID ¢o~e 9rolned wlth
1~.$ FEET
07.4 F~[T
!0 - 2...~0 20
Dote Stetted: 4/8/96 Drilling Method: HAND AUGER
D~te Completed: 4/8/96' . Spoon Sompler ID: 2 INCH
Logged B~.. JIM LARWOOD, C.E.G. Sompler Type: CORE SAMPER
Approved B~: DAN GIFFORD, C.£.G Q~QC:
~IOTE: See Figure 5 for boring Iocotlon. Dote:
PROJECT NAME: TEXACO STATION. BAKERSFIELD. CA PROJECT NO: TEX-O1-T043
I
(DRILLED VERTICAL)
II
BACKFILL DETAIL LITHOLOGY TEST DATA
I )epth OVM
GRAPHIC DESCRIPTION Sample ID./ R,e e d in, cj
'.feet) LOG Time ~ppm)
I/
.:',:,.:.?..:,..).:. SAND (SP), medium gray, flne.to me(Gum g~'elned, damp,
~ ~ ..-... ~ ,, dense, mlcOCeous, moderate odoe, alight stoln;n9.
'"~1111 }'~''¢' 10 !>.::'.~.~? SAND (SP). medium gray. fine to reed;urn gm;ned, damp. 10
· 1355
-- .: =,..:.. dense, m;coceous, sl;~ht to moderate odor, no sro;ri;rig. -- H5-15/ ~ 599
~ ~ H3- t 8/ ~ 4.3
I/
~ ~ 18.5 FEET b6s
I
Dote 'Started: 4/8/96 Dr~lfin9 Method: HAND AUGER
I I Date Completed: 4/8/96' Spoon Sampler ID: 2 INCH
Logged I]y:.. JIM LARWOOD. C.£.G. Sampler Type: CORE SAMPLER
Approved By: DAN. OlF'FORD. C.£.G QA/QC:
IPROJ£CT NAME: TEXACO STATION. BAKERSFIELD. CA PROJECT NO: T£X-O1-T043
~,4~ HAND AUGER BORING
BVV (DRILLED 20° FROM VERTICAL)
H4
BACKFILL DETAIL LITHOLOGY TEST DATA
OVM
epth GRAPHIC DESCRIPTION Sample ID./ Reodlng
~feet) LOG Time (ppm)
[,','~.:~¢.L~;~ ~.~; ;t~'~5~.~ 6 inch concrete
~'~'"~ "~"~;'.':'.",': .' ~O (~), ~;um g~ to bloc~ fine to ~;um gm;n~,
~11111~ Illl~ ~ ~ ""'"~ "':' ':
-- ~'~,.~:;?.?/{., mo;st, medium d~se. ~emte to h~ ~fine ~, --
m~emte staining....
IIII ~ 2 ~.:'w"'~?".;;: 2
~,lll.~ .,11 ~ ' · "."-'.: ',:*'.-~ (s~)~ I~t omnge bro~n:~;um to c.. ,ro;~.=.~........, ...
~11111~ IIII ~ ..... ,..~.....',,
~11111 ~ IIII ~.~..:.,.:..., ~....,:. '
~{~ ~ 5 .:':' ;'~."~:: micoceous, slight to m~erote ~, slight ~oining, 5
I1~11111~ IIII -- , ~..,,.~. ..... H4_5/
'~, '" ': ' ·: ' 0.0
::,. ,:,...,t :.. ,; :' 1510
~11111~ IIII ~ :~...::., ~,., t..:..,
~11111~ IIII ~ ~ ~.::.;:..~,.: ...... 7
I1~11111 ~ IIII ,': ;" ~'¢; ''7:
.'.'..".. ~.~ ~0 (~), m~ium g~, fine ~mi~, m~
~11111~ II11: ~ ~ :..' .",..':.¢..' ..... mlcoc~u~, ~l~ht ~or, ~fight ~lolni~. 8
I1~11111 S IIII -- :.~ :..',.. '~ , --
alllll~ tllll ~ ....... ~,..,~
~11~11111 I ~' ' ........
~ ~lllll ""~"""""~ ~ {$~). ~ht ~r~. m~lum to ~ ~mln~. dom~ Io ~ ,4-10/
I11~ 1~ ~". <' :."'::"~' mo;st, ve~ dense, m;coc~us, ~ ~or, ~ ~ton;ng..
atlll{~ ,,,~,.....:~...:., ~545 ~ o.o
-- ,., ~..:.,.~.:.;..:
II1~ Illl ,,;: ~.: ,:~ ~::"'
~ L~ -'.:;" g ~ '~.~
~11111 ~ ~ 2 ~ 2
ii1~IIII ~ ~:::.:...:::~.:'~,c::
· .F'.: ::. "..~ ".;'~'
II1~ IIIII ~3 ' ,. '.',. ,?,, ~ 3
II1~ IIIII .,'.~,",,,'?:".'
"" ""~'"~'""" ~D (SP). light brown, medi~ 1o c~me gm,ned, damp
~11111 ~ ~5 .... ~' ;.~..-"
~ I111~ -- :.::~' · ":.J~;.:.:e.",.,q. ;: to m~st, ~ de~, m~oc~s, slight ~r, ~. ston;~. -- H4-15/ ~ 0.0
~lllll ~ ...,., .,:,. ~ 62o
~lllll ~ '::..:.::...:. :~ ." ',
~[~l[l[[ 17 '?':":'¥';':"~:'"~O (SP), m~ium bm,n, ~ium to c~ groin~,
?;.~.'; :.:. :~ ~.~..:
~::L',:L;.:¥~:?' moist, ve~ den~, micoc~s, ~ slight ~, no staining.
· al~ IIIII -- -- .s-~s/ ~ 52.~
~11111~ '" ~ ;' "'~" '"'~ <': 1 ~
~l 3.5' I~ 1~ TOTA ~RING ~NGTH
~8.5
' 2~.. (17.4 FE~ ~s) 2~ _
~te Sto~: 4/8/96. Drilling Meth~: ~O AU~R
~te ~mp~[ed: 4/8/96 S~ ~mpte; [0: 2 INCH
~oGGed- ~: JIM ~0, C.E.G. ~mpler Ty~: CORE ~P~R
~prov~ ~: ~ GIFFORD, C.E.G
~TE: ~ ~ure 3 for boring I~aUon. ~te:
~ROJECT NAME: TEMCO STATION, BAKERSFIELD. CA PROdECT NO: TEX-O1-T045
I
BORING LOG
[ HAND AUGER BORING
BVV (DRILLED AT° FROM VERTICAL)
I H5
1
i BACKFILl_ DETAIL LITHOI_OGY TEST DATA
epth OVM
GRAPHIC DESCRIPTION Sample I0./ R, eo din, g
(feet) LOG Time ~,ppm)
~ .'.'~";'~. 5. ,.'.'L
~" ~ 1 ,.'..' ,,?. ;7: '.;: 1
I1~11111--= t111 ,'.';.7:~..F~'..;':~ medium dense, mlcoceou$, no odor, no
I[~lllil _--- Illll -- : ~'.. 4.-:?,';: :.
~llll~ l[ll ---- .-..,,', ,. '., '..
:.::.,:
~ ;. :.'.'., .>., ~..'
- I~lUIl~ IIIII --- ~ ,.:j':..:;::2.:4/:.;:~.
IIl~llllll _--------Illll
~,~ :'.~ :...'.:.:..-'
l~lllll~ IIIlt-=-- 5 .:'., ,: ... :SAND (SP), IkJht brovm, fine to medium groined, dump,
~ IIE~IIIII_--------ilIII ~ ~,..'".:',". ?'; ':.:' medium dense, mk:oceous, no od(x, ~o stoifl~n9. ~ H5-$/ ~ '0.0
. .. ::..:....:,~.:..4::..
BIIIII~lull _--- ~... =..: :..:,.:.., ~520 ·
I/
IF
IIE~IIIII -------tull :'.'.. ': ~,~: '::
? I~11111~IIIll--= ? : :!..':~:;,::":'"'} ?
Ili~lUII ~ IIIII ': :'~ :':, ".:
I~11111~ IIII1~ ---= 8 ::.">. '::.,. ',:: ' 8
IIE~Illll ~ IIIII ~ .":, :..' ,.:.,'~.
i~llll~ IIIIII--= ~.?.,::-.,:..:..,:~,.
9 III~IIIU ~ II111 __~ :~.: ,:: :.-'<.' __9
-- Ill~llllli ' ~1o :...,,,;',:',::':':'~'.,.,...: ,: 'SAND (SP), light brown to light grey, fine to-medium --10 HS-10/
~ ~,..~: ,:...x,. groined, doh~p, medium dense, mk:oceous, $1~ghl[ odor, no
II
IUI~mil ,;;: ¥. :::,"::':
-- iiil~ lull -- .~.':.::.:::~, .;?...( --
'. ;: ..~,:: .?.,t~~ ~
Ill~ Illl a3 :' ,.'.-,. :...
l~lllll --- :.,.,.,.?.,::F::.: .
'll{~{Ill ~v..,:',.,'-:.'.":'
I11~ UII .,:"."'::~.~. ~
':"::'*'"'"":' SAN0 (SP)2 light to medium medium to coorse
ISlIll-=-- 15 :::.:: <: .:..~.::?.:. grey. 1,5
111 ~ ..~':~., ..... . -groined, domp, dense to ve~7 dense, micoceous, slight ~ H5-15/
_= ,:?,.?:.,.:,:;:.: odo,. no .to;.;,~. ~s~5 ~ ,os
II1~ IIII ~s ...... ::- ',.'.,.-'. '
I11~ IIII ":; ''':'~''''
1 ..;~...;.:.:.:=,-..,.SAND ($P), fight to medium grey, medium ~o coorse
'~.:, "~' .::..,:'.: groMed,' domp, very dense, herd to drill, mlcoceou$, slight
I~ ' '15 18,
I11~1111 __ ?.,..:,,:...:;. o~o,, .o .to;,,~. __
I!
I~1111 --= '" :'-.'.":""<'
"v,.':::.,.:,?: ~. ~: ·I
,9 III1~ IIII ~9
· ..~ ...... ...I 1735
'-~l I'~'' 20'-TOTAL BROINO LENGTH " ' ' 20
3.5"
-- 19.5 FEET
Oma FE~T b~s)
10<3re St(~rted: 4/8/96 Drilling Method: HAND AUGER
I Dote Completed: 4/8/96' Spoon Sompler ID: 2 INCH
""Logged By:. JIM LARWOO0, C.E.G. Sumpter Type: CORE SAMPLER
Approved By: DAN GIIrFORD, C.Ir.G QA/OC:
I IoT£: See ~ for Iocotlon. Dote:
boring
II pRoJECT NAME: TEXACO STATION, BAKERSFIELD, CA PROJECT NO: TEX-O1-T043
BORING LOG
HAND AUGER BORING
(DRILLED VERTICAL)
H6
BACKFILL DETAIL
LITHOLOGY
TEST DATA
GRAPHIC
LOG
DESCRIPTION
8 inch
medium brown, fine to medium gm;ned, damp.
dense, m;coceous, no odor. no staining.
SANO (SP), medium brown, fine to medium ~ra;ned. damp.
dense, m;caceoas, no odor. no stain;rig.
SAND (SP). medium brown, slightly gravelly, damp. dense.
m;caceous, herd to dr;Il, no odor. no sro;nih9.
SAND (SP), fight to medium gray, fine to medlum gm;ned,
damp. dense, micoceous, sl;ght odor. sl;ght sro;ri;rig.
1--2
SAND (SP). light gray. medium to coarse grained, damp.
very dense, m;coceouS, slight odor. slight sro;nih9.
SAND (SP). light gray. medium to cnorse groined, damp.
very dense, micaceous, sl;Qht odor. slight stainin~.
SAND (SP), medium orange brown, medium to coarse
groined, some small grovel, damp, very dense, m;coceous,
very slight odor, no staining.
19 TOTAL DEPTH
18.5 FEET bgs
Sample ID./
__.2
___~
4
H6-$/
0745
He-~O/
0810
HA6-15/
O840
0905
2~
ire
ate.
9ged
OVM
R(~o d;n, cj
pm)
140
-66
Started: 4/8/96
Completed: 4/9/96 -
By: JiM t. AR~OOD, C.E.G.
TEproved By:. DAN GIFFORD, C.E.G
: See Figure 5 for boring location.
Drilling Method: HAND AUGER
Spoon Sampler JO: 2 iNCH
Sampler Type: CORE SAMPLER
~/~C:
Dote:
PROJECT NAME: TEXACO .STATION. BAKERSFIELD. CA PROJECT NO: TEX-O1-T043
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EXHIBIT B
HAND AUGERING ILLUSTRATION
ILLUSTRATION
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EXItIBIT C
ELEVATION SURVEY DATA SHEET
I
I ELEVATION SURVEY DATA SHEET
I Project No. "['~¢(-~X -'1--'~$ Date:
Project Name/Address: "V~r.~-.o ~q~e, ~.'x',,,l/ o..~o~ k~. o,,,z.-
I Field Personnel: ~. ~a~. t~t,g~/~'. ~:~4~-~n'~..~ Equip.
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Backsight Foresight Elevation
Station (ft) (ft) (ft) Comments
,, ~.~ fl~.~ ~
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EXHIBIT D
MONITORING WELL PURGE AND SAMPLE LOGS
1
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MONITORING WELL PURGE AND SAMPLE LOG
Vage~.ofJ
tROJECT NAME:"~e.~o~ -
INELL NO: ~ ~ TESTED BY:
easuring Point Description:
tatic Water Depth (ft): 2.~ ·
Level Measuremem Instmmem:
II~vater
I[ur~~
Method:
Time Start Purge: O~ qf- .
PROJECT NO: 'W-el°''o~''r° ~'5
Sample Method:
Time Sampled'
omments:__
Depth to Water at Sampling:
Time End Purge: ~'o'-[.o. Field Preservation:, ~ co._.
I
Depth Water = Column · x 2 inch 6 inch
fit) (f0 fit) 0.S 4.4
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f:\data~forms~pu rge.log
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MONITORING WELL PURGE AND SAMPLE LOG
Page_~of_[
[ROJECT NAME: ~-.o_.~o -
IWELL NO:. ~i7~ TESTED BY'
measuring Poim Description:
tic Water Dep~ (ft): ~
~ater ~vel Measurement Inst~ent:
rge Me.od: ~q ~
Time Start Purge: \\\0
I comments:
PROJECT NO:~~
DATE: '~-]
Sample Method:
Time End Purge:
Time Sampled:
Depth to Water at Sampling: 7...<5, (-'~
Field Preservation:__ ~<o_..
Depth Water = Colunm x 4inch 6inch
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MONITORING WELL PURGE AND SAMPLE LOG
Page'_of ~
ROJECT
NELL NO: ~' ~:~
TESTED BY: '"~- [-o'~,~,~ DATE:
taeaSuring Point Description:
tic Water Depth (ft): 2_'3/4 \
I¢/ater Level Measurement Instrument:
IrMrge Method: ~C. ~ ...-
Time Start Purge: ~
omments:__
Sample Method:
Time End Purge:
Time Sampled:. X 2. \5-
Depth to Water at Sampling:
Field Preservation: ~ ~
Total Depthto Water ~ = (gal)
Depth Water = Colmnn x 4b, ch 6inch
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
I i}:i!}i~ii~ii!!i!¢!:i:~:?i .....................................
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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f:\datakforms~purge.log
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EXHIBIT E
DRUM DISPOSAL RECORDS
: ~: '?~ta~l~st~::.~:~:: .::: Non-Ha~ardou~ Soils : ::.:. ~.?:.:., , ~...Man!fest~.,~:~.~:-:, :~:~
.Date of Shipment: Responsible f~yment: . Transpo~er T~ck ~: Facility ~: Given by TPS:
I C;enerator's Name and Billing .~ddr~s: " ' generator's Phone ~: i generator's US EPA ID No.
.................................. ~ ~- ._ ~ ~ ~ .... :; '.:
t i~] ~ tl-'~:' . FAX~: Customer Account Number with T~:
Consultant's Name and Billing Add~s: Consultant's Phone ~:. ':"¥
Per~vn to Contact: ~.
FAX~: Customer Account Number with T~:
[ Generation Site (Trans~rt from): (name & address~ '; Site Phone ~: BD '~:~:
I ~t- os~ -/4oc : .. · ~¥,.~ ,..
ILe~ ~I~
,-. ~-, :~
- 't FAX~: AVG. ~'~
II ; ., ... Levels ;:; t ~ ? 30 fil ~'~
[ ~ignat~ Faci~ty (Transport to,: (name & address, Facility Phone ~: i Fadlitv Pe~it Numbers
" ' .::4~'
' ' ' :' Pe~on to ~ontact:
~ ' ~e~l :=,=h,-,. ~"~:~) ; F.~--.:- ~ :, '.;.:~':'~,h ~ ;::~ ~'.~, .:,:,~ ..~2~.:~;;.z ~,
~ Trans~rter Name and Mating Address ' Transporter's Phone ~: Tin.porter's US EPA ID No.: ~:
/ ........ : .... P~o~ ~o 6o.~t:" ' ~von~r~ ~T ~o.:
· '",~:~ -~'-, '~-~ .- ~. -- O ~ ; ' :~ ~:.--': ,~,-' "'
. ~_ ~ ~'Y'~.~ ~ c) C; e: ~-: ~'~'-' !: r:-'...
~ [ FAXO: Customer Account Numar with T~:
Description of Soil Moisture 0ontent Oontaminated by: Approx. 0~: Desoription 0f Delive~ I ~ross Weighl I Tare Weight I Net Weight
/ ...... 0 - 10% O Gas O ~ ~ '
~na ~ ~amc ~ · ~ ~ ~ - ' -.
10 - 20 o Di~l ~ ~ · ' .... '
[ ...... 0- 10% O Gas O ~ ' ' :; -- . '
~ ~no ~ ~amc ~ : 10-20% ~ ~1 D " /~ ' -
Clay ~ O~er ~ · ~ ·
/ ~ ~0~-o~e~ O~e~ ~ ~ ,, t " ~ ~'-
/
I G~erator~ and/or consultantg certificatwn: I/We c~ti~ t~t the soil ref~enced h~em ~s taken ~t~rely.~om those soils described m the Sou Data"
I Sheet completed and certified ~ me/us for the Generation 5ite sho~n ~bove ~nd nothing ~s been added or done to such soil that would alter it in
~ ~n~ w~. ' ' ~..~;i
[ Transport~ c~tificatio.: I/We ~ckn~tedge receipt of the soil desc~bed above and c~ti~ that suc~ soil ~ aeliv~ea in exactly the same ~-~
[ condition as when received. I/We ~rther c~ti~ that this soil is being directly transported ~om the G~$ite to the Designated. Facili~
.[ without off-loading, adding to, subtracting ~om or in any way delaying deliv~ to such site. . ~'
[ ~t ~ t~ N .... ~ 5i~a~Bd~:~- ~-' ~:~ ' , Month , Day , Year
.... ,. . . ·
~ Re~cline Facilitu certifies the recei J of the soil covered this mani est exc t as noted above'
~,. ..... . .... ~ '. ~'::...:.: '.. ....... .._: :..::'. ~ . ' .
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TPS TECHNOLOGIES INC. ADE 009~ 04
12328 Hibiscus Ave. Pxtelanto, CA 92301
WEIGHMASTER CERTIFICATE
THIS IS TO CERTIFY that the following described commodity was weighed, measured, or .counted by a weighmaster,
whose signature is on this certificate, who is a recognized authority of accuracy, as prescribed by Chapter 7
(commencing with Section 12700) of Division 5 of the California Business and Professions Code, administered by the
Division of Measurement Standards of the California Department of Food and Agriculture.
Manifest # A07~ _~, 00]. 04/30/96
Generator Si%e Information Facility information
TEXACO #61-058-1405 TPS TECHNOLOGIES
~401N. OAK ST. !2~28 HiBISCUS; AVE.
b^KERSFZ-ELD,~ CA '93301' 'US.~ ' ^delanto. CA 92~303~
DWILSON 1N ---> · ~AS:~5:~pm 5~oss W~: 2,~2~
DWiLSOH OUT --> ~5:35:54pm ?.~re Wi: 820
Truck Humber 93 HET WT: I, 200
Trailer Number 93T
Wt
Gross & Tare Weights Inciud Driver on Scale MCLAUGHLiN TRKHG
I '
' 'vimmt~mtal Sawic~
~ NON-HAZARDOUS WASTE DATA FORM
ei~il~,AT~q SITE
WASTE DEIGtllP'TION ~
:.
P~C~ERTt~[S: ~H~ [] BOLID
I,IMDUNI~ INaTR~'"I'IoN ~
NO. : - :
DAT~.
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EXHIBIT F
LABORATORY REPORTS
AND CHAIN-OF-CUSTODY RECORDS
ANALYTICAL REPORT
80~ ~estern Avenue
Glendale, CA91201
8~8/Z47-5737
Fax: 8]8/~47-g797
Mr. Dan Gilford
ENV America
16 Technology Drive, Suite 154
Irvine, California 92718
AMENDED REPORT
LOG NO: G96-04-164
Received: 10 APR 96
Mailed : 19 APR 96
Requisition: 610581405
Project: TMLBO636A/TEXACO
REPORT OF ANALYTICAL RESULTS
Page 1
NON-AQUEOUS
SAMPLE DATE TPH/BTEX
DESCRIPTION SAMPLED {CADHS/8020)
Date Dilution Benzene Toluene Ethyl- Total Xylenes TPN-g Carbon
Analyzed Factor Benzene Isomers Range
Date Times mg/kg mg/kg mg/kg mg/kg mg/kg
RDL I 0.005 0.005 0.005 0.01 0.05
1.,1-~ ........................ ~}~ ........................... 04/~1/96 ' ................................................................. 1 <0.005 <0.005 <0.005 <0.01 <0.05 c6-c12
2'H1-12 04/08/96 04/11/96 I <0.005 <0.005 <0.005 <0.01 1.7 C6-C12
3'H1-15 04/08/96 04/12/96 I <0.005 <0.005 <0.005 <0.01 0.20 C6-C12
4'H1-18 04/08/96 04/12/96 1 <0.005 <0.005 <0.005 <0.01 0.32 C6-C12
5'H2-5 04/08/96 04/12/96 1 <0.005 <0.005 <0.005 <0.01 <0.05 C6-C12
6'H2-10 04/08/96 04/12/96 I <0.005 <0.005 <0.005 <0.01 <0,05 C6-C12
7'H2-15 04/08/96 04/12/96 1 <0.005 <0.005 <0.005 <0.01 0.051 C6-C12
8'N2-18 04/08/96 04/12/96 1 <0.005 <0.005 <0.005 <0.01 <0.05 C6-C12
9*H3-5 04/08/96 04/12/96 ' 1 <0.005 <0,005 <0.005 <0.01 1.0 C6-C12
10'H3-10 04/08/96 04/12/96 2 <0.01 <0.01 <0.01 <0.02 6.1 C6-C12
11'H3-15 04/08/96 04/12/96 I <0.005 <0.005 <0.005 <0.01 <0,05 C6-C12
12'H3-18 ~4/08/96 04/12/96 1 <0.005 <0.005 <0.005 <0.01 0.081 C6-C12 .
Texaco contact: Mr. Lee Bouchez
Site address: 2401N. Oa~ Street, Bakersfield, CA
Amended report: The dete~tion limit~ for tph (total)
has been changed to i mg/L.
--E. Strahan 05/13/96
ANALYTICAL REPORT
801 itestern Avenue
Glendale, CA91201
818/247-5737
Fax: 8]8/247-9797
LOG NO: G96-04-164
Received: 10 APR 96
Mailed : lg APR 96
Mr. Dan Gifford
ENV America
16 Technology Drive, Suite 154
Irvine, California 92718
Requisition: 610581405
Project: TMLBO636A/TEXACO
REPORT OF ANALYTICAL RESULTS
Page 2
NON-AQUEOUS
SAMPLE DATE TPH TPH/BTEX
DESCRIPTION SAMPLED (CADHS/3550) (CADHS/8020)
Dilution Date Carbon TPH-d Date Dilution Benzene Toluene
Factor Extracted Range Analyzed Factor
Times Date Mg/kg Date Times mg/kg mg/kg
RDL 10 i 0.005 0.005
13'H4-5 04/08/96 i --- 04/11/96 C10-C25 <10 04/12/96 1 <0.005 <0.005
14'H4-10 04/08/96 1 --- 04/11/96 C10-C25 <10 04/12/96 i <0.005 <0.005
15'H4-15 04/08/96 1 --- 04/11/96 C10-C25 22 04/12/96 i <0.005 <0.005
16'H4-18 04/08/96 1 --- 04/11/96 C10-C25 <10 04/12/96 1 <0.005 <0.005
17'H5-5 04/08/96 1 --- 04/11/96 C10-C25 <10 04/12/96 I <0.005 <0.005
18'H5-10 04/08/96 I --- 04/11/96 C10-C25 <10 04/12/96 1 <0.005 <0.005
19'H5-15 04/08/96 10 --- 04/11/96 C10-C25 250 04/12/96 1 <0.005 <0.005
20'H5-19 04/08/96 20 --- 04/11/96 C10-C25 1100 04/12/96 1 <0.005 <0.005
21'H6-5 04/09/96 i --- 04/11/96 C10-C25 <10 04/15/96 1 <0.005 <0.005
22'H6-10 04/09/96 ' 20 --- 04/11/96 C10-C25 . 880 04/15/96 1 <0.005 .<0.005
23'H6-15 04/09/96 20 --- 04/11/96 C10-C25 1400 04/15/96 1 <0.005 <0.005
24'H6-18 04/09/96 20 --- 04/11/96 C10-C25 1100 04/15/96 i <0.005 <0.005
I~1 I ~ ~
ANALYTICAL REPORT
801 Ifestern Avenue
Glendale, CA 91201
818/247-5737
Fax: 818/247-9797
LOG NO: G96-04-164
Received: 10 APR 96
Mailed : 19 APR 96
Mr. Dan Gifford
ENV America
16 Technology Dnive, Suite 154
Irvine, California 92718
Requisition: 610581405
Project: TMLBO636A/TEXACO
REPORT OF ANALYTICAL RESULTS .- Page 3
NON-AQUEOUS
SAMPLE DATE TPH/BTEX
DESCRIPTION SAMPLED (CADHS/8020)
Ethyl- Total Xylenes TPH-g Carbon
Benzene Isomens Range
mg/kg mg/kg mg/kg
RDL 0.005 0.01 0.05
13'H4-5 04/08/96 <0.005 <0.01 <0.05 C6-C12
14'H4-10 04/08/96 <0.005 <0.01 <0.05 C6-C12
15'H4-15 04/08/96 <0.005 <0.01 <0.05 C6-C12
16'H4-18 04/08/96 <0.005 <0.01 <0.05 C6-C12
17'H5-5 04/08/96 <0.005 <0.01 <0.05 C6-C12
18'N5-10 04/08/96 <0.005 <0.01 <0.05 C6-C12
1g'H5-15 04/08/96 <0.005 <0.01 0.48 C6-C12
20*H5-1g 04/08/96 <0.005 <0.01 2.8 C6-C12
21'H6-5 04/09/96 <0.005 <0.01 <0.05 C6-C12
22'H6-10 04/09/96 <0.005 <0.01 .<0,05 C6-C12
23'H6-15 04/09/96 <0.005 <0.01 0.31 C6-C12
24'H6-18 04/09/96 <0.005 <0.01 0.36 C6-C12
801 Western Avenue
~/enda/e, 0,4 ~.~201
818[Z47-$757
Fax: 818/247-9797
LOG NO: G96-04-164
Received: 10 APR 96
Mailed : lg APR 96
Mr. Dan Gifford
ENV America
16 Technology Drive, Sutte '154
lrvine, California 92718 ,"
Requisition: 610581405
Project: TMLBO636A/TEXACO
REPORT OF ANALYTICAL RESULTS
Page 4 .
AQUEOUS
SAMPLE DATE GRO/DRO TPH/BTEX
DESCRIPTION SAMPLED (CADHS/8020)
~ Date Date Dilution TPH (total) Date Dilution Benzene Toluene Ethyl-
Analyzed Extracted Factor Analyzed Factor Benzene
Date Date Times mg/L Date Times ug/L ug/L~ ug/L
................................................................................. ~.? ~- -~ ~ ...........................................................
RDL i 1 0.3 0.3 0.3
25'C7 04/09/96 04/11/96 04/11/96 1 <1 04/12/96 1 0.92 <0.3 <0.3
26'C8 04/09/96 04/11/96 04/11/96 1 <1 04/11/96 1 2,9 <0.3 <0.3
27'4A 04/09/96 04/11/96 04/11/96 1 <1 04/11/96 1 4.2 <0.3 <0.3
B C Analytical
~ ~ / BBB
ANALYTICAL REPORT
801 ttestern Avenue
6lendale, CA~I201
818/247-5757
Fax: 818/247-9797
LOG NO: G96-04-164
Received: 10 APR 96
Mailed : 19 APR 96
Mr. Dan Gifford
ENV America
16 Technology Drive, Suite 154
Irvine, California 92718
Requisition: 610581405
Project: TMLBO636A/TEXACO
REPORT OF ANALYT. ICAL RESULTS
Page .5
AQUEOUS
SAMPLE DATE TPH/BTEX
DESCRIPTION SAMPLED (CADHS/8020)
~ Total Xylenes TPH-g Carbon
Isomers Range
ug/L ug/L
RDL 0.6 100
25'C7 04/09/96 <0.6 <100 C6-C12
26*¢8 04/09/96 <0.6 <100 ¢6-C12
27'4A 04/09/96 <0.6 <100 C6-C12
B C Analytical
ANALYTICAL REPORT
80Z Yesterf~Avenue
Glendale,
8Z8/247-5757
Fax: 8Z8/247-9797
LOG NO: G96-04-164
Received: 10 APR 96
Mailed : 19 APR 96
Mr. Dan Gifford
ENV America
16 Technology Drive, Suite 154
Irvine, California 92718
Requisition: 610581405
Project: TMLBO636A/TEXACO
· ~ REPORT OF ANALYTICAL RESULTS · Page 6 ·
£
AQUEOUS
SAMPLE DATE TPH/BTEX
DESCRIPTION SAMPLED (CADHS/8020)
Date Dilution Benzene Toluene Ethyl- Total Xylenes TPH-g Carbon
Analyzed Factor Benzene Isomers Range
Date Times ug/L ug/L ug/L ug/L ug/L
RDL 1 0.3 0.3 0.3 0.6 100
28*TB # 60312 04/09/96 04/11/96 i <0.3 <0.3 <0.3 <0.6 <100 C6-C12
Gre'~.'a~Ga]~sti~~~[a ba ou ' n, r y ' ~
The analytical results within this report relate only to the specific
compounds and samples investigated and may not necessarily reflect
other apparently similar material from the same or a similar location.
This report shall not be reproduced, except in full, without the
written approval of BCA. No use of this report for promotional or
advertising purposes is permitted without prior written BCA approval.
A ALYTICAL REPORT
80] Yestern Avenue
Glendale, CA 91201
8181247-5737
Fax: 818/247-9797
LOG NO: G96-04-388
Received: 18 APR 96
Mailed : 26 APR 96
Mr. Dan Gilford
ENV America
16 Technology Drive, Suite 154
Irvine, California 92718
Requisition: 610581405
Project: TMLBO636A/TEXACO
REPORT OF ANALYTICAL RESULTS
Page I
NON-AQUEOUS
SAMPLE DATE TPH
DESCRIPTION SAMPLED (CADHS/3550)
Dilution Date Carbon TPH-d
Factor Extracted Range
Times Date Mg/kg
RDL 10
1'H1-15 04/08/96 1 --- 04/22/96 C10-C25 <10
2'H1-18 04/08/96 ! --- 04/22/96 C10-C25 13
Site: 2401 Oak St., Bakersfield
TES contact: Mr. Lee Bouchez
'Greta Galoustian, Laboratory Director~~
The analytical results within this report relate only to the specific
compounds and samples investigated and may not necessarily reflect
other apparently similar material from the same or a similar location.
This report shall not be reproduced, except in full, without the
written approval of BCA. No use of this report for promotional or
advertising purposes is permitted without prior written BCA approval.
BC ANA
DATE PRINTED: 07 MAY 1996
NON-AQUEOUS SAMPLES'
...... METHOD BLANK ..................... LAB CONTROL ..............
Batch: DIESEL*9663
TPH (Diese) Range)
[Naphtha)ene]
LCS LCSD RPD
UNITS RESULT RDL FLG ~REC FLG ~REC FLG LCL UCL RPD UCL
Method: 8015M - Modified 8015
mg/kg 0
Percent 124
10 137 - 114 37 166 18
121 - 103 55 127
................ MATRIX QC ................
RPD MS MSD RPD RPD
FLG ~REC FLG ~REC FLG LCL UCL RPD UCL FLG
103 - 117 43 151 13 38
109 - 92 52 145 - -
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