HomeMy WebLinkAboutHAZ-BUSINESS PALN 4/26/1994 I
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HOLGUIN, FAHAN & ASSOCIATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
ENVIRONMENTAL PLANNERS · SCIENTISTS · GEOLOGISTS AND ENGINEERS
Contaminated Sile Assessments · Real Estate Audits · Site Remediation · Hazardous Waste Management
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HOLGUIN, FAHAN & ~OCIATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
143 South Figueroa Street · Ventura, California 93001 (805) 652~0219 · FAX (805) 652-0793
853 West 17th Street * Costa Mesa, California 92627 (714) 642-2660 · FAX (714) 642-2544
3157 Pegasus Drive · Bakersfield, California 93308 (805) 391-0517 · FAX (805) 391-0826
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VAPOR EXTRACTION TEST REPORT
CALIFORNIA SHEET METAL
601 EUREKA STREET
BAKERSFIELD, CALIFORNIA
APRIL 13, 1994
'1
Contractor:
Address:
Holguin, Fahan & Associates, Inc.
3157 Pegasus Drive
Bakersfield, California 93308
Client: John M. and Deanna J. McCauley
I Address: Post Office Box 2348
Bakersfield, California 93303-2348
Client Contact: In care of Patrick C. Carrick
I Byrum, Holland & Griffin
Project Manager Name: Mark R. Magargee, R.G.
I Telephone Number: (805) 391-0517
Mark R. Fahan, R.G., R.E.A. Mark R. Magargee, R.~. ~"
I Vice President Senior Hydrogeologist
Holguin, Fahan & Associates, Inc. Holguin, Fahan & Associates, Inc.
ENVIRONMENTAL PLANNERS · SCIENTISTS ® GEOLOGISTS AND ENGINEERS
Contaminated Site Assessments * Real Estate Audits * Site Remediation * Hazardous Waste Management
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HOLGUIN,
FAHAN
& ASSOCIATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
TABLE OF CONTENTS
Page
]. Introduction ....................................................................... 1
2. Site Background ................................................................ 2
3. Geology and Hydrogeology ............................................ 4
4. Vapor Extraction Test Procedures and Results ................ 6
4.1 Variable-Rate Flow Test ........................................... 6
4.2 Radius of Influence Test ........................................... 7
4,3 Subsurface Permeability .......................................... 7
4A Extracted Vapor Concentrations ............................. 8
5. Conclusions ....................................................................... 9
SECTION II - FIGURES
1 Site Location Map
2 Plot Plan
3 Piping Diagram
4 Wellhead Vacuum versus Flow Rate for Extraction Wells
VW-1, VW-2, and VW-3
5 Graphical Determination of ROI for Extraction Well VW-2 ~
6 Soil Permeability (k) Values for Various Soil Types
7 Subsurface Air Velocity versus Distance from Extraction Well
VW-2
8 Subsurface Air Travel Time versus Distance from Extraction
Well VW-2
SECTION III - SUMMARY TABLES
3.1 Summary of Soil Sample Analysis Results from
Calpi, Inc.'s, December 17, 1991, Tank Removal
3.2 Summary of Soil Sample Analysis Results from
Wilson & Associates, Inc.'s, March 19, 1992, Assessment
3.3 Summary of Soil Sample Analysis Results from
Piwarea Engineering, Inc.'s, March 8, 1993, Assessment
3.4 Summary of Variable-Rate Flow Test Data for Vapor Extraction
Well VW-1
3.5 Summary of Variable-Rate Flow Test Data for Vapor Extraction
Well VW-2
3.6 Summary of Variable-Rate Flow Test Data for Vapor Extraction
Well VW-3
3.7 Summary of Constant-Rate Flow Test Data for Vapor Extraction
Well VW~2
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HOLGUIN,
FAHAN
& ASSOCIATES, lNG.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
SECTION IV - A1TACHMENTS
1 Vapor Extraction Well Construction Details
2 Vapor Extraction Test Procedures and Equipment
3 Vapor Extraction Test Recording Log
4 Laboratory Analysis Report
Table of Contents
Page 2
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HOLGUIN,
FAHAN
& ~IATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
1. INTRODUCTION
Holguin, Fahan & Associates, Inc., (HFA) was contracted by John M. and Deanna J. McCauley
to conduct a vapor extraction test at the California Sheet Metal facility located at
601 Eureka Street, Bakersfield, California. The work was performed in accordance with HFA"s
vapor extraction work plan submitted November 15, 1993. The vapor extraction test was
conducted on January 26, 1994, to determine site-specific parameters for use in the evaluation
of vapor extraction as a remediation option and to aid in the design of an effective remediation
system.
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HOLGUIN,
FAHAN
& IATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
John M. and Deanna J. McCauley
California Sheet Metal
April 13, 1994 - Page 2
2. SITE BACKGROUND
California Sheet Metal is located at 601 Eureka Street in a commercial and light industrial district
of the city of Bakersfield, California (see Figure 1 - Site Location Map). The site previously
housed a single 550-gallon, gasoline underground storage tank (UST) (see Figure 2 - Plot Plan).
The property owners are John M. and Deanna J. McCauley, 4297 Country Club Drive, Bakersfield,
California, 93306. The consultant contact is Mark R. Magargee, Holguin, Fahan & Associates,
Inc., 3157 Pegasus Drive, Bakersfield l California, 93308, (805) 391-0517.
California Sheet Metal contracted with Calpi, Inc., of Bakersfield, California, to remove the
550-gallon, gasoline UST, dispenser, and associated underground product line on
December 17, 1991. The tank was removed under Bakersfield Fire Department Hazardous
Materials Division (BFDHMD) UST Local Oversight Program (LOP) Permit #BP-0031. During the tank
removal, soil samples were collected from 2 and 6 feet below the center of the tank cavity at
the direction of Mr, Joe Dunwoody with the BFDHMD UST LOP. Concentrations of total petroleum
hydrocarbons (TPH) as gasoline, and benzene, toluene, ethylbenzene, and total xylenes
(BTEX) were detected in the soil samples (see Section III, Table 3.1, for a summary of the tank
removal soil sample analysis results).
On March 19, 1992, six soil borings (B-1 through B-6) were drilled by Wilson & Associates, Inc.,
(W&A) in order to inspect the subsurface conditions and to determine whether soil and
groundwater contamination was present beneath the site (see Figure 2 for boring locations).
Concentrations of TPH as gasoline and BTEX were detected in soil samples to a depth of less
than 75 feet below ground level (BGL) and less than 50 feet laterally from the former UST location
(see Section III, Table 3.2, for a summary of W&A"s preliminary assessment soil sample analysis
results). However, the lateral limits to the northwest and southeast were not delineated by the
preliminary site characterization. Upon review of the preliminary site characterization, the
BFDHMD UST LOP requested additional soils investigation to address these issues.
On March 8, 1993, three soil borings (B-7 through B-9) were drilled by Piwarea Engineering, Inc,,
(Piwarea) at the site (see Figure 2 for boring locations). The additional soils investigation
showed that TPH as gasoline and BTEX concentrations were present to a depth of less than
75 feet BGL and less than 35 feet laterally from the former UST location (see Section III, Table 3.3,
for a summary of the expanded Piwarea assessment soil sample analysis results).
Based upon the previous investigation activities, the BFDHMD UST LOP requested that
John M. and Deanna J. McCauley perform remedial activities to reduce the concentrations of
gasoline hydrocarbons in the soil to below the action level for TPH as gasoline (100 mg/kg) as
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HOLGUIN,
FAHAN
8l ASSOCIATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
John M. and Deanna J. McCauley
California Sheet Metal
April 13, 1994 - Page 3
prescribed by the BFDHMD UST LOP. John M. and Deanna J. McCauley contracted with HFA to
perform these mitigation activities in the form of the installation and operation of an in-situ
vapor extraction system (VES).
On January 17 and 18, 1994, HFA drilled and installed six vapor extraction wells (see Figure 2 for
well locations). Three wells (VW-1 through VW-3) were drilled through the center of the area
showing the greatest hydrocarbon concentrations and completed as a vapor extraction well
cluster. Well VW-1 was drilled to a depth of 70 feet BGL and completed with 25 feet of 4-inch
diameter, slotted well screen. Well VW-2 was drilled to a depth of 45 feet BGL and completed
with 25 feet of slotted well screen. Well VW-3 was drilled to a depth of 20 feet BGL and
completed with 15 feet of slotted well screen. The other three wells (VW-4 through VW-6) were
positioned at locations designed to effectively remediate gasoline hydrocarbons in the lateral
area of the vadose zone plume. Wells VW-4 through VW-6 were drilled to a depth of 40 feet
BGL and completed with 30 feet of sloffed well screen. Soil sampling was not performed while
drilling because the soil borings were positioned within an area that has previously undergone
extensive sampling and laboratory analysis.
Extraction well construction details include the following: 4-inch diameter, PVC, slotted casing
with a screened interval that is limited to 30 feet in each well in order to create a maximum
radius of influence (ROI) and to efficiently extract the hydrocarbons. The wells are constructed
of 4-inch diameter, blank PVC casing above the screen to the ground surface. A filter pack was
placed in the annular space around the well casing. The filter pack extends from the bottom of
the soil boring to approximately 3 feet above the well screen. A 5-foot-thick bentonite seal was
installed at the top of the filter pack in order to prevent short circuiting to the surface. A
cement/sand/bentonite slurry was placed from the top of the bentonite seal to the ground
surface. Each wellhead is protected by a locking, water tight, traffic-grade well cover installed
in concrete (see Attachment 1 for vapor extraction well construction details).
HFA connected the wells through 4-inch diameter piping to a central manifold northwest of the
former UST (see Figure 2). The collection manifold is positioned within a temporary fenced
enclosure, where the vapor extraction unit will also be contained. The extraction piping is
stubbed-up into the central manifold with each well dual valved to be utilized as either a vapor
extraction well or inlet well so as to enhance air flow across the impacted zone
(see Figure 3 - Piping Diagram).
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HOLGUIN,
FAHAN
& ASSOCIATES, 1NC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
John M. and Deanna J. McCauley
California Sheet Metal
April 13, 1994 - Page 4
3. GEOLOGYAND HYDROGEOLOGY
The site is located in the southern part of the Great Valley geomorphlc province. The
Great Valley is a north-south trending valley approximately 400 miles long by 50 miles wide, the
southern portion of which is referred to as the San Joaquin Valley. The surface of the
San Joaquin Valley is underlain by unconsolidated, Quaternary-aged, alluvial sediments. The
alluvial sediments are underlain by older, predominantly lake bed deposits. These deposits lie
unconformably on Mlocene-Pliocene-aged marine sediments, which extend to crystalline
basement at a depth of approximately 20,000 feet BGL.
Geologic deposits in the study area include Pleistocene-aged alluvial sediments of the
Kern River Formation, which form a homocline dipping gently to the south. The deposits are
alluvium consisting of poorly indurated and dissected fan deposits (California Division of Mines
and Geology, 1964).
The near surface alluvium consists of silty sands and fine-grained to coarse-grained sands, with
intervals of finer-grained, sandy silts and minor clay. Subsurface material encountered during
previous drilling at the site was alluvium to the total depth of each soil boring. The previous
assessments at the site indicate a moderate to good permeability, silty-sand to well-graded
sand section to a depth of approximately 90 feet BGL
The subject site is located on the eastern edge of the San Joaquin Valley and Western flank of
the southern Sierra Nevada. The Kern River drains a large area of the southern Sierra Nevada,
including the highest part of the range at Mount Whitney. The modern river has cut a canyon
north of the site and provides recharge for groundwater along its course. Sedimentary
geologic formations observed at the surface and underlying the site were sourced by the
Sierra Nevada and transported via the ancestral Kern River.
Surface and groundwater in the San Joaquin Valley is derived predominantly from the
Sierra Nevada mountain range to the east and is transported by five major rivers, the closest to
the site being the Kern River. The depth to the regional unconfined aquifer is approximately
200 feet BGL beneath the site, and the groundwater gradient is to the south (Kern County Water
Agency, 1992 Report on Water Conditions, Improvement District #4, February 1993). The nearest
known occurrence of perched groundwater is 2 miles to the southwest at a depth of 20 feet BGL
in the abandoned Kern River channel to the ancient Kern Lake bed (Kern County Water
Agency, 1992 Water Supply Report, May 1993).
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HOLGUIN,
FAHAN
& ASSOCIATF , INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
John M. and Deanna J. McCauley
California Sheet Metal
April 13, 1994 - Page 5
In the region of the site, the Tertiary sedimentary sequence, from top to bottom, is non-marine
Kern River Formation, non-marine Chanac Formation, marine Santa Margarita Formation
(possibly inteffingering with Chanac Formation due to tentative correlation of a Santa Margarita
Formation section west of the San Andreas fault), marine Round Mountain Silt, marine
Olcese Sand, marine Freeman Silt, marine Jewett Sand and Pyramid Hill member, marine
Vedder Sand, and non-marine Walker Formation. Of these, only the Kern River, Chanac, and
Santa Margarita Formations are important to the hydrogeology of the site. The Tertiary,
non-marine Kern River Formation is unconformably overlain by bouldew terrace deposits of
Quaternary Older Alluvium.
Two naturally occurring geologic units are present in the near surface within the site. The two
natural units are the Tertiary (Miocene to Pliocene-aged) non-marine Kern River Formation and
the Quaternary (Pleistocene-aged) Older Alluvium. The Older Alluvium forms a thin terrace
deposit lying unconformably on the Kern River Formation.
Quaternary Older Alluvium: The alluvium is middle to lower Pleistocene age (Qoa2 of Bartow,
1984). The Older Alluvium is a flat lying terrace deposit approximately 5 to 10 feet thick, which
overlies the erosional surface of the Kern River Formation. The Older Alluvium is comprised of
very coarse material, with boulders to 50 cm in diameter. Clastic material composition includes
granitic and dioritic crystalline rocks characteristic of the Sierra Nevada batholiths, quartzite
characteristic of pre-batholithic rocks, and volcanic and related rocks such as andesite and
dark siliceous agate typical of Neogene deposits of the Mojave desert. In 'some locations
caliche rims have developed between clasts.
Kern River Formation: The age of the Kern River Formation includes upper Miocene, Pliocene,
and possibly Pleistocene age. The Kern River Formation is composed of interstratified
fanglomeratic deposits and silty claystones. Within the fanglomerates are conglomerate
beds with cobbles to 20 cm in diameter and in some areas fanglomerate beds exhibit cross
bedding 2.5 to 5 meters thick. The silty claystone beds, which would serve as Iow permeability
barriers to vertical migration, are laterally continuous as much as several thousand feet, but are
locally truncated by sandy fanglomerate units. Another important factor in considering the
potential for migration is the lack of secondary permeability within the Kern River Formation as
no secondary cracks, small faults, or gypsum veins are observed.
Chanac Formation: The Chanac Formation of upper Miocene age is not exposed within the site
area but outcrops in the cliffs northeast along the Kern River bluffs at Hart Park. It is a thinly
bedded, chalky silfstone exhibiting many secondary cracks and gypsum veins.
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HOLGUIN,
FAHAN
& ASSOCIATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
John M. and Deanna J. McCauley
California Sheet Metal
April 13, 1994 - Page 6
4. VAPOR EXTRACTION TEST PROCEDURES AND RESULTS
The vapor extraction test included procedures to determine the flow rate and vacuum
characteristics of the individual wells; the intrinsic soil permeability; the ROI of the wells; the radial
darcian vapor velocity; and the initial hydrocarbon concentrations of the extracted vapors.
Wells VW-1, VW-2, and VW-3 were utilized as the vapor extraction wells in this test. Monitoring
points consisted of wells VW-4 through VW-6. The well locations are shown in Figures 2 and 3.
The equipment used to conduct the vapor extraction test included a 5-horsepower,
' Sutorbilt Model 3ML, positive displacement blower capable of generating flow rates of up to
150 standard cubic feet per minute (scfm) at a maximum wellhead vacuum (WHV) of
140 inches of water (ins-water). The vapor control device utilized two Westates Carbon, Inc.,
Model VSC 200, activated carbon filters installed in series. System parameters were monitored
using various magnahelic vacuum gauges, pitot tube and turbometer flow gauges, and a
photoionizatlon detector (PID). The vapor extraction equipment was operated under an
exemption to Authority to Construct (ATC) permit issued by the San Joaquin Valley Unified
Air Pollution Control District - Southern Zone (SJVUAPCD-SZ). A summary of the procedures and
equipment used during the vapor extraction test is provided in Attachment 2.
4.1 VARIABLE-RATE FLOW TEST
The purpose of the variable-rate flow test was to define the pressure and flow characteristics of
the subsurface soils at each individual vapor extraction well and to estimate the characteristics
of the VES required for adequate remediafion. A variable-rate flow test was conducted by
connecting a vacuum blower to individual wells, extracting soil vapors at incremental vacuum
steps, and recording the corresponding flow rates measured at the vapor extraction wells.
As shown in Figure 4 - Wellhead Vacuum versus Flow Rate for Extraction Wells VW-1, VW-2,
and VW-3, a linear relationship was obtained between the applied WHV and flow rate for each
well. Noticeably higher vacuums were achieved from well VW-3 due to a shorter exposed
screen length of 15 feet and subsurface irregularities. Flow rates as high as 125 cfm were
obtained with inlet vacuums of 10 ins-water for well VW-1, 114 cfm with inlet vacuums of
9 ins-water for well VW-2, and 88 cfm with inlet vacuums of 32 ins-water for well VW-3 (see Figure
4 and Section Ill, Tables 3.4, 3.5, and 3.6, for summaries of variable-rate flow test data for vapor
extraction wells VW-1, VW-2, and VW-3, respectively). The large vapor flow rates at Iow well
vacuums as measured for extraction wells VW-1 and VW-2 are a result of a variety of factors
including a highly permeable soil formation and relatively long screen lengths of the
vapor extraction wells.
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HOLGUIN,
FAHAN
& ASSOCIATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
John M. and Deanna J. McCauley
California Sheet Metal
April 13, 1994 - Page 7
4.2 RADIUS OF INFLUENCE TEST
In general, the ROI depends on soil properties of the vented zone; properties of surrounding soil
layers; the vacuum applied to the well; and the presence of any impermeable boundaries.
The test procedures typically involve extracting soil vapors from a well at various WHVs and
measuring the resultant subsurface vacuums at a distance away from the well.
One ROI test was conducted at the site. WHYs of 3, 6, and 9 ins-water were applied at well
VW-2. Flow rates and, corresponding wellhead and subsurface vacuums were then monitored
until subsurface conditions stabilized. The data measured during the test was recorded on a
vapor extraction test recording log (see Attachment 3 for log).
HFA utilized a graphical method for estimating the ROI that is based on a modification of the
distance-drawdawn method used in groundwater studies. A formula-based model was used
to determine the intrinsic soil permeability and other characteristics of the vadose zone. The
ROI for each WHV at the vapor extraction wells is graphically determined by plotting the
subsurface vacuums, measured in ins-water, by the log of the distance away from the well. A
straight line is then drawn between the points and extended until It intercepts the zero vacuum
line. This is the distance at which the subsurface vacuums decrease to atmospheric pressure,
or the ROI, for that particular WHV (Johnson, et al.l). The ROI was determined to be between
.34 and 43 feet at WHVs of 3 to 9 ins-water for well VW-2 (see Section III, Table 3.7, for a summary
of constant-rate flow test data for vapor extraction well VW-2 and Figure 5 - Graphical
Determination of ROI for Extraction Well VW-2). The effective ROI is the distance'from the well at
which the subsurface vacuums decrease to 1 percent of the applied vacuum at the wellhead.
For well VW-2, the effective ROI was determined fo be essentially the same as the graphic ROI
due to the Iow vacuums achieved at the site.
4.3 SUBSURFACE PERMEABILITY
The intrinsic soil permeability can be determined through the use of the Johnson equations, The
calculated soil permeability was approximately 50 darcys (1 darcy = 1 X 10-8 cm2) for well VW-2,
which is in the range for medium-grained to coarse-grained sands (see Figure 6 - Soil
Permeability (k) Values For Various Soil Types). Figure 7 - Subsurface Air Velocity versus
Distance from Extraction Well VW-2 relates subsurface velocities to distance.
Figure 8- Subsurface Air Travel Time versus Distance from Extraction Well 'VW-2 relates
subsurface distance to time.
1johnson, P.C., Kemblowski, M.W., and Colthart, J.D.; "Quantitative Analysis for the Cleanup of
Hydrocarbon-Contaminated Soils by In-Situ Soil Venting"; Ground Water Vol. 28, No. 3: May - June 1990.
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HOLGUIN,
FAHAN
& ASSOCIATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
John M. and Deanna J. McCauley
California Sheet Metal
April 13, 1994 - Page 8
4.4 EXTRACTED VAPOR CONCENTRATIONS
During the vapor extraction test, extracted vapors were monitored for volatile organic
compounds (VOCs). Extracted vapors were monitored with a PID to provide a relative
indication of VOCs. The volatile organic concentrations monitored during the test were
recorded on the vapor extraction test recording log. Laboratory samples were collected in
l-liter, TedlarTM bags and analyzed at Del Mar Analytical, a California state-certified laboratory.
The samples were analyzed for TPH as gasoline and BTEX using DHS TPH Method and
EPA Method 8020 (see Table 1 for a summary of the laboratory analysis results and
Attachment 4 for the laboratory analysis report).
As shown in Table 1, the TPH as gasoline concentrations of vapors extracted from well VW 1
varied from 97,000 parts per million by volume (ppmv) at the start of the vapor extraction test to
82,000 ppmv at the end of the test; from well VW-2, concentrations varied from 100,000 ppmv at
the start of the vapor extraction test to 94,000 ppmv at the end of the test; and from well VW-3,
concentrations varied from of 37,000 ppmv at the start of the vapor extraction test to
71,000 ppmv at the end of the test.
TABLE 1.
VAPOR EXTRACTION TEST ANALYSIS RESULTS
VENT WELL SAMPLE SAMPLE TPH AS ETHYL- TOTAL
NUMBER IDENTIFICATION TIME GASOLINE BENZENE TOLUENE BENZENE XYLENES
(ppmv) (ppmv) (ppmv) (ppmv) (ppmv)
DETECTION
LI M IT N/A N/A 800 400 400 400 400
VW-1 VW-1 Initial 13:40 97,000 4,700 6,400 410 1,800
VW-1 Final 15:13 82,000 4,400 5,800 320 1,400
VW-2 VW-2 Initial 11:38 100,000 5,3001 5~800 280 1,200
VW-2 Final 13:24 94,000 5,0001 6,400 390 1,700
VW-3 VW-3 Initial 15:25 37,000 1,4001 3,200 300' 1,600
VW-3 Final 17:23 71,000 2,800 6,1 O0 460 2,100
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N/A = Not applicable.
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HOLGUIN,
FAHAN
& ASSOCIATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
John M. and Deanna J. McCauley
California Sheet Metal
April 13, 1994 - Page 9
5. CONCLUSIONS
The conclusions of the vapor extraction test performed in the area of gasoline-containing soils
can be summarized as follows.
Variable-rate flow tests were performed on vapor extraction wells VW-1, VW-2, and VW-3
in order to define pressure and flow characteristics. Flow rates as high as 130 cfm were
obtained with inlet vacuums of 10 ins-water for well VW-1, 114 cfm with inlet vacuums of
9 ins-water for well VW-2, and 88 cfm with inlet vacuums of 32 ins-water for well VW-3. The
permeability determined for soils surrounding the vapor extraction wells was 50 darcys,
which is excellent for vapor extraction applications.
An ROI test was performed at vapor extraction well VW-2. An ROI of approximately 34 to
43 feet was obtained at WHVs of 3 to 9 ins-water for well VW-2. Known gasoline-containing
soils are within the ROI of the currently installed vapor extraction well field. No additional
wells should be required.
3. Extracted vapor concentrations of up to 100,000 ppmv were measured. For remediation of
fuel hydrocarbons present at this site, thermal oxidation/catalytic conversion is suggested.
HFA recommends a 250 to 500 scfm direct-fired, thermal oxidizer with the capability of
conversion to catalytic conversion. HFA is currently preparing an ATC permit application,
which will be filed with the SJVUAPCD-SZ. The application contains equipment
specifications and schematics, operating procedures, monitoring programs, and a public
health risk appraisal. Copies of the ATC application will be forwarded to the BFDHMD UST
LOP.
MRM:vab:ffm:kad
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HOLGUIN,
FAHAN
& ASSOCIATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
SECTION II
FIGURES
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LEGEND
REVISON DATE: OCTOBER 15. 1993: KJM
SITE
JOHN Ill. AND DEANNA J. McCAULEY
CALIFORNIA SHEET METAL
601 EUREKA STREET
BAKERSFIELD, CALIFORNIA
FIGURE 1 - SITE LOCATION MAP
HOLGUIN, FAHAN & ASSOCIATES, INC.
EUREKA STREET
SIDEWALK
GATE CHAIN-LINK FENCE
~- CALIFORNIA
u) SHEET METAL
z
cc BUILDING
CONCRETE
SLAB
\ ,
GATE ,
\.~.-'" CANOPY
\ ,
\ :" ~t < LIMIT OF
~ _B_-_2_. ,,' T~.N3K-i~'~A-V'ATiON
lNG
GASOLINE-CONTAINING
SOIL
B-4
CHAIN LINK B-4
~ FENCE ~.
B-7
ALLEY
LEGEND JOHN M. AND DEANNA J. McCAULE¥
SCALE IN FEET CALIFORNIA SHEET METAL
BOREHOLE
LOCATIONS
~ 601 EUREKA STREET
B-4
o lO 20 BAKERSFIELD, CALIFORNIA
FIGURE 2 - PLOT PLAN
~ HOLGUIN, FAHAN & ASSOCIATES, INC.
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REVISON DATE: OCTOBER 28, 1993: KJM
!
m
EUREKA STREET
SIDEWALK
' CHAIN-LINK FENCE
GATE
~- CALIFORNIA
u) SHEET METAL
z
n' BUILDING
CONCRETE
SLAB
GATE VES
\.~,~-'~' CANOPY UNll
\ B-6
LIMIT OF~'~'
GASOLINE-CONTAINING
SO~L
CHAIN LINK ~
~- FENCE ~
B-7
LEGEND JOHN M. AND DEANNA J. McCAULEY
SCALE IN FEET CALIFORNIA SHEET METAL
BOREHOLE
LOCATIONS
~ 601 EUREKA STREET
B-4
o lO 20 BAKERSFIELD. CALIFORNIA
FIGURE 3 - PIPING DIAGRAM
(~ VAPOR EXTRACTION WELL LOCATIONS '
VW-6 HOLGUIN, FAHAN & ASSOCIATI~S, INC.
m
m
m
m
m
m
m
:m
m
'm
m
m
m
m
m
m
m
REVISON DATE: OCTOBER 28, 1993: KJM
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HOLGUIN,
FAHAN
& ASSOCIATe, 1NC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
FIGURE 4 - WELLHEAD VACUUM VERSUS FLOW RATE FOR EXTRACTION
WELLS VW-1, VW-2, AND VW-3
35
3O
25
2O
15
10
5
0.00 25.00 50.00 75.00 100.00 125.00
Flow Rate (cfm)
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HOLGUIN,
FAHAN
& ASSOC~T~, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
FIGURE 5 - GRAPHICAL DETERMINATION OF ROI FOR EXTRACTION WELL
VW-2
1,8
1.6
1.4
1.2
1
0.8
0.6
0,4
0.2
10
Radius (feet)
· WHV -- 3 ins-water
D WHV -- 6 ins-water
· WHV = 9 ins-water
100
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HOLGUIN,
FAHAN
& ASSOC~T~, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
FIGURE 6 - SOIL PERMEABILITY (k) VALUES FOR VARIOUS SOIL TYPES
Clayey Sands
Fine Sands
Medium Sands
Coarse Sands
0.01
I I I
0.1
1 10
k (Darcy) cm2
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100
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1 ,o0o
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HOLGUIN,
FAHAN
& ~IATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
FIGURE 7 - SUBSURFACE AIR VELOCITY VERSUS DISTANCE FROM
EXTRACTION WELL VW-2
10
0.1
0.01
1
0.00 5.00 10.00 15.00 20.00 25.00 30.00
Distance from Extraction Well (feet)
35.00
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HOLGUIN,
FAHAN
& ~IATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
FIGURE 8 - SUBSURFACE AIR TRAVEL TIME VERSUS DISTANCE FROM
EXTRACTION WELL VW-2
7.00
6,00
5.00
4.00
3.00
2.00
1.00
0.00
0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00
Distance from Extraction Well (feet)
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HOLGUIN,
FAHAN
& ASSOCIATe, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
SECTION III
SUMMARY TABLES
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TABLE 3.1
SUMMARY OF SOIL SAMPLE ANALYSIS RESULTS
FROM CALPI, INC."S, DECEMBER 17, 1991, TANK REMOVAL
SAMPLE TPH AS ETHYL- TOTAL
NUMBER DEPTH GASOLINE BENZENE TOLUENE BENZENE XYLENES
(feet BTB) (m(:j/k~) (mg/kg) (mg/kg) (mg/kg) (mg/kg)
MRL N/A 1 0.005 0.005 0.005 0.005
S-1 2 810 44 1701 19 1531
S-2 6 10,000 98 275 i 23 290
BTB = Below tank base. MRL = Minimum reporting level. N/A = Not applicable.
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TABLE 3.2
SUMMARY OF SOIL SAMPLE ANALYSIS RESULTS FROM
WILSON & ASSOCIATES, INC."S, MARCH 19, 1992, ASSESSMENT
BORING TPH AS ETHYL- TOTAL TOTAL ORGANIC
NUMBER DEPTH GASOLINE BENZENE TOLUENE BENZENE XYLENES LEAD LEAD
(feet BGL) (mg/kg) (mg/kg) (mg/kg) (rog/kg) (mg/kg) (mg/kg) (mg/kg)
MRL N/A 1 0.005 0.005 0.005 0.005! 2.5 0.5
B-1 5 6,000 N D (>20) 210 50 1,960 39 2.7
B-1 15 6,000 N D(>100) 390 170 1~290 ....
B-1 30 3,100 N D (>2) 86 71 438 4.5 --
B-1 45 3,000 5 160 75 390 ....
B-1 60 13,000 110 1,300 300 2,560 ....
B-1 75 ND ND ND ND ND ND --
B-1 80 ND I ND ND ND ND ....
B-1 85 ND' ND 0.047 ND 0.014 4.5 --
B-1 90 ND 0.084 0.16 0.049 0.088 ....
B-2 15 12,000 1,000 ~ 1,500 340 2,480 ....
B-2 30 400 0.2 1.2 4.7 49 3.9 --
B-3 30 30,000 400 3,400 800 4,300 ....
B-4 30 ND ND ND ND ND ....
B-4 40 ND ND ND~ ND ND ....
B-5 15 ND 0.011 0.017 ND: ND ....
B-5 40 7,000 42 540 160 810 ....
B-6 20 ND ND ND ND ND 3.6 --
B-6 30 ND ND ND ND ND ....
B-6 40 ND ND 0.008 ND 0.010 8.5 --
BGL = Below ground level. MRL = Minimum reporting level. N/A = Not applicable. N D = Not detected. -- = Not analyzed.
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Summary Tables
Page 2
TABLE 3.3
SUMMARY OF SOIL SAMPLE ANALYSIS RESULTS FROM
PIWAREA ENGINEERING, INC.'S, MARCH 8, 1993, ASSESSMENT
BORING TPH AS ETHYL- i U I AL
NUMBER DEPTH GASOLINE BENZENE TOLUENE BENZENE XYLENES
Ifeet BGL) (rog/kg) (rog/kg) (rog/kg) (rog/kg) (rog/kg)
MRL N/A I 0.005 0.005 0.005 0.005
B-7 20 ND ND ND ND ND
B-7 30 ND ND ND ND ND
B-7 50 N D' 0.064 0.029 N D 0.015
B-8 20 ND ND ND ND ND
B-8 35 N D 0.079 0.11 N D 0.090
B-9 30 ND ND ND ND ND
B-9 40 ND ND~ ND ND ND
B-9 50 N D 0.11 0.027 N D 0.045
BGL = Below ground level. MRL = Minimum reporting level. N/A = Not applicable. N D = Not detected.
TABLE 3.4
SUMMARY OF VARIABlE-RATE FLOW TEST DATA FOR VAPOR EXTRACTION WELL VW-1
Patm-Pw: V: Q: Q/H:
Vacuum of Extraction Well Velocity Flow Rate Flow Rate per Screen Length
(ins-water) (ft/min) (cfm) (cfm/f t)
2.0 1,400 31 1.2
3.0 2,080 45 1.8
4.0 2,620 57 2.3
5.0 3,400 74 3.0
6.0 3,850 84 3.4
7.0 4,540 99 4:0
8.0 4,950 108 4.3
9.0 5,550 121 4.8
10.0 5,950 130 5.2
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TABLE 3.5
SUMMARY OF VARIABLE-RATE FLOW TEST DATA FOR VAPOR EXTRACTION WELL VW-2
Patm-Pw: V: Q: Q/H:
Vacuum of Extraction Well Velocity Flow Rate Flow Rate per Screen Length
(ins-water) Ift/min) {cfm) /cfm/ft)
2.0 1,240 27 1.1
3.0 1,870 41 1.6
4.0 2,460 54 2.2
5.0 2,990 65 2.6
6.0 3,550 77 3.1
7.0 4,130 90 3.6
8.0 4,580 100 4.0
9.0 5,240 114 4.6
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Summa~ Tables
Page 3
TABLE 3.6
SUMMARY OF VARIABLE-RATE FLOW TEST DATA FOR VAPOR EXTRACTION WELL VW-3
Patm-Pw: V: Q: Q/H:
Vacuum of Extraction Well Velocity Flow Rate Flow Rate per Screen Length
(ins-water) IftJmin) (cfm) (cfm/ft)
3.5 610 13 0.9
6.0 870 19 1.3
9.0 1,330 29 1.9
12.0 1,700 37 2.5
15.0 2,050 45 3.0
18.0 2,460 54 3.6
21.0 2,870 63 4.2
24.0 3,150 69 4.6
27.0 3,500 76 5.1
30.0 3,820 83 5.5
32.0 4,040 88 5.9
TABLE 3.7
SUMMARY OF CONSTANT-RATE FLOW TEST DATA FOR VAPOR EXTRACTION WELL VW-2
CONSTANTS VALUES
Diw: Initial Water Depth (ft) N/A
Dsi: Depth to Top of Screened Interval (ft) 20
Ls: Extraction Well Screened Length (ft) 25
Rw: Extraction Well Casing Radius (ins) 2
Ss: Extraction Well Screen Slot Size (ins) 0.02
Rs: Effluent Stack Radius (ins) 1
rl: Distance to Monitoring Point P(r) l (ff) 11.5
r2: Distance to Monitorincj Point P(r)2 (ft) 34.0
VARIABLES
Qs: H:
Stack 'Length of P(r)l P(r)2
Patm-P(w): Vs: Effluent Exposed (VW-3): (VW-6):
Vacuum of Stack Exit Flow Screen Q/H Q/WHV Sub. Sub.
Extraction Well Velocity Rates Interval (scfm/ (scfm/ Vacuum Vacuum
(ins-water) (ft/min) (scfm) (fi) ft) ins-water) (ins-water) (ins-water)
3 2,160 47 25 1.9 15.7 0.2 0.0
6 3,650 80 25 3.2 13.3 0.4 0.1
9 5,500 120 25 4.8 13.3 1.0 0.4
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Patm = Atmospheric pressure (ins-water)
P(w) = Pressure at the extraction well (ins-water)
Patm-P(w) = WHV (ins-water)
WHV = Wellhead vacuum (ins-water)
H = L-(Patm-P(w))/12 or L-(WHV/12) (ft)
L = Length of exposed well screen above the groundwater table (ft)
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Summary Tables
Page 4
TABLE 3.8
SUMMARY OF HOLGUIN, FAHAN & ASSOCIATES, INC.'$
JANUARY 26, 1994, VAPOR EXI'IMtkCTION TEST ANALYSIS RESULTS
VENT WELL SAMPLE SAMPLE TPH AS ETHYL- TOTAL
NUMBER IDENTIFICATION TIME GASOLINE BENZENE TOLUENE BENZENE XYLENES
(ppmv) (ppmv) (ppmv) (ppmv) (ppmv)
MRL N/A N/A I 0.005 0.005 0.005 0.005
VW-1 VW-1 Initial 13:40 97~000 4,700 6,400 410 1,800
VW-1 Final 15:13 82,000 4,400 5,800 320 1,400
VW-2 VW-2 Initial 11:38 100,000 5,300 5,800 280 1,200
VW-2 Final 13:24 94,000 5,000 6,400 390 1,700
VW-3 VW-3 Initial 15:24 37,000 1,400 3,200 300 1,600
VW-3 Final 17:23 71,000 2,800 6,100 460 2,100
ppmv = Parts )er million by volume. MRL = Minimum reporting level. N/A = Not applicable.
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HOLGUIN,
FAHAN
& ~IATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
SECTION IV
ATTACHMENTS
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HOLGUIN,
FAHAN
& ASSOC~T~, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
A'n'ACHMENT 1.
VAPOR EXTRACTION WELL CONSTRUCTION DETAILS
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VAPOR EXTRACTION WELL CONSTRUCTION DETAILS
Client Name
Project Name
Site Address
Date Completed
Supervised by
John M. and Deanna J. McCauley
California Sheet Metal
601 Eureka Street, Bakersfield, California
January 17, 1994
Mark R. Magarcjee, R.G.
Figure No...
Well Nos.
WELL COVER
GROUND SURFACE
TOP WELL CAP
SURFACE SEAL
depth of surface seal
type of surface seal
ANNULAR SEAL
annular seal thickness
type of annular seal
Iow permeability seal thickness
LOW PERMEABILITY SEAL type of Iow permeability seal
WELL CASING
diameter of well casing
type of well casing
GRAVEL PACK
depth of top of gravel pack
type of gravel pack
N/A
VW-1
5 feet
Neat cement
30 feet
Neat cement
5 feet
Bentonite chips
4 inches
Sch. 40 PVC
40 feet
Aquarium sand
--SCREEN
depth of top of screen
screen slot size
45 feet
0.02 inches
70 feet
10 inches
70 feet
-- BO'I-I'OM WELL CAP
HOLGUIN, FAHAN & ASSOCIATES, INC.
(805) 391-0517
depth of well
diameter of borehole
depth of borehole
3157 Pegasus Drive
Bakersfield, California 93308
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VAPOR EXTRACTION WELL CONSTRUCTION DETAILS
Client Name
Project Name
Site Address
Date Completed
Supervised by
John M. and Deanna J. McCaule¥
California Sheet Metal
601 Eureka Street, Bakersfield, California
January 17, 1994
Mark R. Magargee, R.G.
Figure No.
Well Nos.
N/A
VW-2
WELL COVER
GROUND SURFACE
TOP WELL CAP
SURFACE SEAL
ANNULAR SEAL
PERMEABILITY SEAL
WELL CASING
GRAVEL PACK
depth of surface seal
type of surface seal
annular seal thickness
type of annular seal
Iow permeability seal thickness
type of Iow permeability seal
diameter of well casing
type of well casing
depth of top of gravel pack
type of gravel pack
5 feet
Neat cement
5 feet
Neat cement
5 feet
Bentonite chips
4 inches
Sch. 40 PVC
15 feet
Aquarium sand
SCREEN
depth of top of screen
screen slot size
20 feet
0.02 inches
45 feet
10 inches
45 feet
-- BO'i-rOM WELL CAP
HOLGUIN, FAHAN & ASSOCIATES, INC.
(805) 391-0517
depth of well
diameter of borehole
depth of borehole
3157 Pegasus Drive
Bakersfield, California 93308
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VAPOR EXTRACTION WELL CONSTRUCTION DETAILS
Client Name
Project Name
Site Address
Date Completed
Supervised by
John M. and Deanna J. McCauley
California Sheet Metal
601 Eureka Street, Bakersfield, California
January 18, 1994
Mark R. Magargee, R.G.
Figure No.
Well Nos.
N/A
VW-3
WELL COVER
GROUND SURFACE
TOP WELL CAP
SURFACE SEAL
ANNULAR SEAL
depth of surface seal
type of surface seal
annular seal thickness
type of annular seal
Iow permeability seal thickness
LOW PERMEABILITY SEAL type of Iow permeability seal
WELL CASING
GRAVEL PACK
diameter of well casing
type of well casing
depth of top of gravel pack
type of gravel pack
1 foot
Neat cement
I foot
Neat cement
2 feet
Bentonite chips
4 inches
Sch. 40 PVC
4 feet
Aquarium sand
SCREEN
depth of top of screen
screen slot size
5 feet
0.02 inches
20 feet
10 inches
20 feet
-- BOTTOM WELL CAP
HOLGUI~, FAHAN & ASSOCIATES, ]~C.
(805) 391-0517
depth of well
diameter of borehole
depth of borehole
3157 Pegasus Drive
Bakersfield, California 93308
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VAPOR EXTRACTION WELL CONSTRUCTION DETAILS
Client Name
Project Name
Site Address
Date Completed
Supervised by
John M. and Deanna J. McCauley
California Sheet Metal
601 Eureka Street, Bakersfield, California
January 17, 1994
Mark R. Magargee, R.G.
Figure No.
Well Nos.
N/A
WELL COVER
GROUND SURFACE
TOP WELL CAP
SURFACE SEAL
ANNULAR SEAL
depth of surface seal
type of surface seal
annular seal thickness
type of annular seal
Iow permeability seal thickness
LOW PERMEABILITY SEAL type of Iow permeability seal
WELL CASING
GRAVEL PACK
diameter of well casing
type of well casing
depth of top of gravel pack
type of gravel pack
2 feet
Neat cement
2 feet
Neat cement
3 feet
Bentonite chips
4 inches
Sch. 40 PVC
7 feet
Aquarium sand
--SCREEN
depth of top of screen
screen slot size
10 feet
0.020 inches
40 feet
10 inches
40 feet
-- BO'FrOM WELL CAP
HOLGUIN, FAHAN & ASSOCIATES, INC.
(805) 39i-05i7
depth of well
diameter of borehole
depth of borehole
3157 Pegasus Drive
Bakersfield, California 93308
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!
VAPOR EXTRACTION WELL CONSTRUCTION DETAILS
Client Name
Project Name
Site Address
Date Completed
Supervised by
John M. and Deanna J. McCauley
California Sheet Metal
601 Eureka Street, Bakersfield, California
January 18, 1994
Mark R. Magargee, R.G.
WELL COVER
GROUND SURFACE
TOP WELL CAP
Figure No.
Well Nos.
SURFACE SEAL
depth of surface seal
type of surface seal
ANNULAR SEAL
annular seal thickness
type of annular seal
Iow permeability seal thickness
LOW PERMEABILITY SEAL type of Iow permeability seal
WELL CASING
diameter of well casing
type of well casing
GRAVEL PACK
depth of top of gravel pack
type of gravel pack
N/A
2 feet
Neat cement
2 feet
Neat cement
3 feet
Bentonite chips
4 inches
Sch. 40 PVC
7 feet
Aquarium sand
--SCREEN
depth of top of screen
screen slot size
10 feet
0.020 inches
40 feet
10 inches
40 feet
-- Bo'FrOM WELL CAP
HOLGUIN, FAHAN & ASSOCIATES, INC.
(805) 391-0517
depth of well
diameter of borehole
depth of borehole
3157 Pegasus Drive
Bakersfield, California 93308
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VAPOR EXTRACTION WELL CONSTRUCTION DETAILS
Client Name John M. and Deanna J. McCauley
Project Name California Sheet Metal Figure No. N/A
Site Address 601 Eureka Street, Bakersfield, California
Date Completed January 18, 1994 Well Nos. VW-6
Supervised by Mark R. Ma~laq;ee, R.G.
iiii!i?ii~ii?: :i!i !i!;,i!ii!ii!:, TOP WELL CAP
depth of surface seal 2 feet
i?~i:i:i~~~':~:~ ~ SURFACE SEAL type of surface seal Neat cement
~~ ~ ANNULAR SEAL annular seal thickness 2 feet
I type of annular seal Neat cement
i '~~ Iow permeability seal thickness 3 feet
~ LOW PERMEABILITY SEAL type of Iow permeability seal Bentonite chips
....
diameter of well casing 4 inches
WELL CASING type of well casing Sch. 40 PVC
7 feet
~ GRAVEL PACK depth of top of gravel pack
type of gravel pack Aquarium sand
SCREEN depth of top of screen 10 feet
screen slot size 0.020 inches
depth of well 40 feet
diameter of borehole 10 inches
depth of borehole 40 feet
, -- BOTTOM WELL CAP
HOLGUIN, FAHAN & ASSOCIATES, INC. 3157 Pegasus Drive
(805) 391-0517 Bakersfield, California 93308
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HOLGUIN,
FAHAN
& ASSOCIATES, INC.
ENVIRONMENTAL MANAGEMF~-NT OONSULTANTS
ATTACHMENT 2.
VAPOR EXTRACTION TEST PROCEDURES AND EQUIPMENT
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VAPOR EXTRACTION TEST PROCEDURES AND EQUIPMENT
VAPOR MONITORING EQUIPMENT
MONITORING EQUIPMENT CONSTITUF_N~{S) MEASURED EFFECTIVE RANGE
I - 2,000 ppmv
OVM PID volatile organic content (as isobutylene)
Dwyer Magnahelic 0 - 0,25 ins-water
Series 2000 subsurface vacuum 0 - 1.0 ins-water
differential pressure gauges 0 - 2,5 psi
Davis Instruments turbometer emissions stack velocity 0 - 9~999 feet per minute
Omega HH P-6150
differential pressure meter WHV 0 - 200 ins-water
Westates Carbon, Inc.; (Westates)
VSC-200 0-125 scfm flow
activated carbon filters not applicable 200-lb carbon capacity
Thomas Model 2107 vapor sampling
pump not applicable not applicable
Sutorbilt Model 3ML 5-horsepower 150 scfm maximum flow
vapor extraction blower 140 ins-water maximum
not applicable vacuum
3lD = Photoionization detector, ppmv = Parts per million by volume, ins-water = Inches o! water, psi = Pounds
per square inch. WHV = Wellhead vacuum, scfm = Standard cubic feet per minute.
VARIABLE-RATE FLOW TEST
A variable-rate flow test Is conducted by connecting the positive displacement blower to the
vapor extraction well(s). The WHV is allowed to stabilize and then recorded on a Vapor
extraction test recording log, An Omega Model HHP-6150 differential pressure meter is used to
monitor the WHV from a port located on the vacuum side of the blower. A Davis Instruments
electronic wind speed indicator (turbometer), a Dwyer Series 2000 differential pressure gauge,
and a pitot tube are used to monitor the stack velocity at the outlet of the 2-inch, inside
diameter (ID), emissions stack. The temperature of the emissions is also monitored at the outlet
of the 2-inch ID stack. The stack velocity and temperature are then used to calculate the
standard volumetric flow rate achieved with the blower.
After recording the pressure-flow data at the initial conditions, the vacuum is increased in
incremental steps, and corresponding flow rates are recorded in the vapor extraction test
recording log.
RADIUS OF INFLUENCE AND INTRINSIC SOIL PERMEABILITY
The radius of influence (ROI) test is conducted at the extraction well, and subsurface vacuums
are monitored at surrounding wells. The test is conducted by connecting the Sutorbilt vacuum
blower to the well, operating the blower at three different flow rates, and monitoring the resultant
subsurface vacuum at surrounding monitoring points using an Omega HHP-6150 differential
pressure gauge. The subsurface and WHVs are monitored until they stabilize at each flow rate
and are then recorded on the vapor extraction test recording log.
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Vapor Extraction Test Procedures
and Equipment
Page 2
HFA utilizes a graphical method for estimating the ROI that is based on a modification of the
distance-drawdown method used in groundwater studies. A formula-based model patterned
after Johnson, et al. 1, is used to determine the intrinsic soil permeability and other characteristics
of the vadose zone. The ROI at each WHV is graphically determined by plotting the
subsurface vacuums measured in ins-water by the log of the distance (r) away from the
extraction well. A straight line is then drawn between the points and extended until it intercepts
the zero-vacuum axis. This is the distance at which the subsurface vacuums decrease to
atmospheric pressure, or the ROI, for that particular WHV. The effective ROI for the well is
defined as the distance where 1 percent of the WHV is achieved.
SOIL VAPOR CONCENTRATION
During the vapor extraction tests, extracted soil vapors are monitored for volatile organic
compounds (VOCs). A Thomas Model 2107 vapor sampling pump is connected to the
pressure side of the blower to collect extracted soil vapors prior, to treatment via carbon
canisters supplied by Westates. The VOCs of the extracted vapors are monitored using a PID.
The PID is calibrated to a 100 ppmv isobutylene standard prior to commencing the test.
Readings taken with the PID are used to provide a relative indication of VOCs within the
extracted vapor stream and for emission monitoring. All constituents are monitored until stable
flow conditions are achieved and are then recorded on the vapor extraction test recording
log.
In addition to monitoring the extracted vapors with field instruments, samples of the extracted
vapor stream are collected from the extraction well(s) at the beginning and end of the test.
Laboratory samples are collected by connecting a TedlarTM bag to the sampling pump via
TeflonTM tubing. Prior to collecting the samples from each well, soil vapors are monitored with
the PID until VOCs in the vapor stream stabilize. The TedlarTM bag is labeled, sealed, and
delivered to a California state-certified laboratory and analyzed for applicable constituents.
TEST DURATION
The vapor extraction test is completed within one 8-hour day.
I Johnson, P.C., Kemblowski, M.W., and Colthart, J.D.; "Quantitative Analysis for the Cleanup of
Hydrocarbon-Contaminated Soils by In-Situ Soil Venting"; Ground Water Vol. 28, No. 3; May - June 1990.
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HOLGU1N,
FAHAN
& ASSOC¼T~, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
A1TACHMENT 3.
VAPOR EXTRACTION TEST RECORDING LOG
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HOLGUIN,
FAHAN
& ~IATES, INC.
ENVIRONMENTAL MANAGEMENT CONSULTANTS
ATTACHMENT 4.
LABORATORY ANALYSIS REPORT
Analyte
Benzene ........................................
Toluene .........................................
Ethyl Benzene ...............................
Total X¥1enes .................................
Volatile Fuel Hydrocarbons
I
Del arAnal,,,c E~,,..~ [~ ~,,. ,,..-.- ~,,,~ ,,,.-,-,,,, ,~. ,,,.
943~u 114, T~, ~ 85281 (~21968-8272 F~ (602) 968-1338
~':~;'i~'~'i:~';'"~'~'~':':~'"~'~'~'~i'~{ ~' ............... e'jj~{"~ ~;:r~~A~,~~Metal Sampled: Jan 26,
143 South Figueroa St. ~ Received: Jan 28, 1994~
in Tedlar
~Ventum, CA 93001 Sample Descfipt: Air Sample Bag, ~-1 Initial Analyzed: Jan 29, 1994
RepoSed: Jan 31, 1994~
Affention: Neal Keller Lab Number: DA02804 ...
VO~TILE FUEL HYDROCARBONS with BTEX DISTINCTION
Detection Limit Sample Result
rog/m3 rog/m3
Detection Limit Sample Result
ppm/vol ppm/vol
400 15,000 .................. 130 .................. 4,700
400 24,000 .................. 110 .................. 6,400
400 1,800 .................. 92 .................. 410
400 8,000 .................. 92 .................. 1,800
800 340,000 .................. 230 .................. 97,000
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Hydrocarbons detected by this method range from C6 - C15.
The molecular weight of 86 was used to conve~t Volatile Fuel Hydrocarbons from rog/m3 to ppm by volume.
Analytes reported as N.D. were not present above the stated limit of detection. Due to matrix effects and/or other factors, the
sample required dilution. Detection limits for this sample have been raised by a factor of 80.
DEL MAR ANALYTICAL, IRVINE (ELAP #1197)
Laboratory Director
DA02804.HFA <1 of 6>
Del Mar Analytical
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2852 Alten Ave ~e. CA92714
1014 E. Cooley Dr.. Suite A, t.olton. C.~ 92324
16525 Sherman Way, Suite C- 1 I. Van Nuys, CA 91406
943 South 48th St., Suite ! $4, Tempe, ~ 85281
(7114) 261-1022 FAX (714! 26.1-1228
(909) 370-4667 FAX (909J 370-1046
(8181 ?79-1844 FAX(818) 779-1843
(602) 968-8272 FAX (602) 968-1558
143 South Figueroa St. . Received: Jan 28, 1994
iiiiVentura, CA 93001 Sample Descript: Air Sample in Tedlar Bag, VW-1 Final Analyzed: Jan 29, 1994
Ii!iiiAttention: Neal Keller Lab Number: DA02805 Reported: Jan 31, 1994ii::
VOLATILE FUEL HYDROCARBONS with BTEX DISTINCTION
Analyte Detection Limit Sample Result Detection Limit Sample Result
rog/m3 rog/m3 ppm/vol ppm/vol
14,000 .................. 130 .................. 4,400
22,000 .................. 110 .................. 5,800
1,400 .................. 92 .................. 320
6,200 .................. 92 .................. !,400
290,000 .................. 230 .................. 82,000
Benzene ........................................ 400
Toluene ......................................... 400
Ethyl Benzene ...............................400
Total Xylenes ................................. 400
Volatile Fuel Hydrocarbons ............ 800
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Hydrocarbons detected by this method range from C6 - C15.
The molecular weight of 86 was used to conveff Volatile Fuel Hydrocarbons from rog/m3 to ppm by volume.
Analytes reported as N.D. were not present above the stated limit of detection. Due to matdx effects and/or other factors, the
sample required dilution. Detection limits for this sample have been raised by a facto[ of 80.
DEL MAR ANALYTICAL, IRVINE (ELAP #1197)
Laboratory Director
DA02804. HFA <2 of 6>
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2852 Alton Ave~- ~..CA92714 ['/141261-1022 FAX (714) 26.1-1228
Del Mar al cai
~3 ~u~ ~8~ ~, ~ui~ I I ~. T~. ~ 852~ I (60~196~8272 F~ (6021968.1338
143 South Figueroa St. Received: Jan 28,
Venture, CA 93001 sample Descfipt:Air Samplein Tedlar Bag. ~-2 Initial Analyzed: Jan 29, 1994
Affention: Neal Keller Lab Number: DA02806 RepoSed: Jan 31, 1994
~[~[~[:~[:~:~::::~::~::~::~:~:~:~::~:~::::::::~::::~:::~:~:[:~:::::~:~:~::~::¥~:~::~:~ ~-..--:-,.>:..~...~.~-..>~.:.---;:~.:~->~::+ ...................... :.:..,.:....,.>..~:, ...................... :. ~.;..:.:.......:....:.....,:. .:. ...................
VOLATILE FUEL HYDROCARBONS with BTEX DISTINCTION
Analyte Detection Limit Sample Result Detection Limit Sample Result
mg/m3 mg/m3 ppmlvol ppm/vol
Benzene ........................................ 400
Toluene ......................................... 400
Ethyl Benzene ...............................400
Total Xylenes ................................. 400
Volatile Fuel Hydrocarbons ............ 800
17,000 .................. 130 .................. 5,300
22,000 .................. 110 .................. 5,800
1,200 .................. 92 .................. 280
5,100 .................. 92 .................. !,200
350,000 .................. 230 .................. 100,000
Hydrocarbons detected by this method range from C6 - C15.
The molecular weight of 86 was used to convert Volatile Fuel Hydrocarbons from mg/m3 to ppm by volume,
Analytes reporled as N.D. were not present above the stated limit of detection. Due to matrix effects and/or other factors, the
sample required dilution. Detection limits for this sample have been raised by a factor of 80.
DE{f~ ~.~,ANALYTICAL, IRVINE (ELAP #1197)
Gary~Steube
Laboratory Director
DA02804.HFA <3 of 6>
· 2852 Alton AvE ~e. CA 92714 (714) 261ol022 FAX (714) 261-~ 228
MarAnalyticai
16525 Sherman Way, Suite C-11, Van Nu~s, CA 91406 (818) 779-1844 FAX (81 S) 779-1845
943 Sou~h 461~ St.. Suite ! 14. Tempe, AZ 65:261 (602) 968-6272 FAX (602) 968-1338
143 South Fi0ueroa St Received: ,lan 28, 1994
iii:~Ventura, CA 93001 Sample Descript: Air Sample in Tedlar Bag, VW-2 Final Analyzed: Jan 29, 1994
I ~iAttention: Neal Keller Lab Number:. DA02807 Reported: Jan 31,
VOLATILE FUEL HYDROCARBONS with BTEX DISTINCTION
Analyte Detection Limit Sample Result Detection Limit Sample Result
mg/m3 rog/m3 ppm/vol ppm/vol
Benzene ........................... : ............ 400 16,000 .................. 130 .................. 5,000
Toluene ......................................... 400 24,000 .................. 110 .................. 6,400
Ethyl Benzene ............................... 400 1,700 .................. 92 .................. 390
Total Xylenes ................................. 400 7,200 .................. 92 .................. 1,700
Volatile Fuel 800 330,000 .................. 230 .................. 94,000
Hydrocarbons
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Hydrocarbons detected by this method range from C6 - C15.
The molecular weight of 86 was used to convert Volatile Fuel Hydrocarbons from rog/m3 to ppm by volume.
Analytes reported as N.D. were not present above the stated limit of detection. Due to matrix effects and/or other factors, the
sample required dilution. Detection limits for this sample have been raised by a factor of 80.
DE~R ANALYTICAL, IRVINE (ELAP #1197)
Gai~lSte~be
Laboratory Director
DA02804. HFA <4 of 6>
~ 2852 Alton Av~ eo CA 92714 {714) 261-1022 FAX (7~ 4) 26~-1228
~~Del Mar Analytical ,o,,,.~o,..~,..~.,..~,~, ,.,,,~.,,
16525 Sherman Way. Suite C-I !. Van Nu,/s. CA 91406 (818) 779-1844 FAX (818) '/79-184-~
943 South 48th St.. Suite ! 14. Tempe. AZ 8528! (602] 968-8272 FAX (602) 968-1338
South Fig-eros St. 1994iiiii
i~Ventura, CA 93001 sample Oescdpt: Air Sample in Tedlar Bag, VW-3 Initial Analyzed: Jan 29, 1994
iiAttention: Neal Keller Lab Number. DA02808 Reported: Jan 31, 199477i
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VOLATILE FUEL HYDROCARBONS with BTEX DISTINCTION
Analyte Detection Limit Sample Result Detection Limit Sample Result
mg/m3 mg/m3 ppm/vol ppm/vol
Benzene ........................................ 400 4,400 .................. 130 .................. 1,400
I Toluene .........................................400 12,000 .................. 110 .................. 3,200
Ethyl Benzene ............................... 400 1,300 .................. 92 .................. 300
Total Xylenes ................................. 400 7,000 .................. 92 .................. !,600
IVolatile Fuel Hydrocarbons ............ 800 130,000 .................. ..................
23O
37,000
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Hydrocarbons detected by this method range from C6 - C15.
The molecular weight of 86 was used to convert Volatile Fuel Hydrocarbons from mg/m3 to ppm by volume.
Analytes reported as N.D. ware not present above the stated limit of detection. Due to matrix effects and/or other factors, the
sample required dilution. Detection limits for this sample have been raised by a facto[ of 80.
DE{~ ~).R ANALYTICAL, IRVlNE (ELAP #1197)
Gary(~teu'be
Laboratory Director
DAO2804. HFA <5 of 6>
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~ 2852 Alton Ave e. CA 92714 (7141261-1022 FAX (7141 26.1°1228
16525 She~nan Way0 Suite C- I I. Van Nu~s. C~ 91406 (818)?79-1844 FAX (818) 779-1843
943 Sou~ ~Sth St., Suite I ! 4. Teml~e. AZ 85281 (602) 968-8272 FAX (602) 968-1338
~i1143 South Figueroa St Received: Jan 28,
iliVentura, CA 93001 'Sample Descript: Air Sample in Tedlar Bag, VW-3 Final Analyzed: Jan 29, 1994
ill, Attention: Neal Keller Lab Number: DA02809 Reported: Jan 31,
I VOLATILE FUEL HYDROCARBONS with BTEX DISTINCTION
Analyte Detection Limit Sample Result Detection Limit Sample Result
rog/m3 rog/m3 ppm/vol ppm/vol
Benzene ........................................ 400
Toluene ......................................... 400
Ethyl Benzene ...............................400
T~alXylenes .................................400
Volatile Fuel Hydrocarbons ............ 800
8,900 .................. 130 .................. 2,800
23,000 .................. 110 .................. 6,100
2,000 .................. 92 .................. 460
9,300 .................. 92 .................. 2,100
250,000 .................. 230 .................. 71,000
Hydrocarbons detected by this method range from C6 - C15.
The molecular weight of 86 was used to convert Volatile Fuel Hydrocarbons from rog/m3 to ppm by volume.
Analytes reported as N.D. were not present above the stated limit of detection. Due to matrix effects and/or other factors, the
sample required dilution. Detection limits for this sample have been raised by a factor of 80.
DEL M&R ANALYTICAL, IRVINE (ELAP #1197')
Ga~Steube~
Laboratory Director
OAO2804,HFA <6 of 6>