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ARCHIVED REPORTS XR0001840
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3500 - Local Oversight Program
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PR0544430
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ARCHIVED REPORTS XR0001840
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Last modified
5/7/2019 2:30:57 PM
Creation date
5/7/2019 2:20:53 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0001840
RECORD_ID
PR0544430
PE
3526
FACILITY_ID
FA0005370
FACILITY_NAME
PARMAR TEXACO
STREET_NUMBER
521
Direction
N
STREET_NAME
CHEROKEE
STREET_TYPE
LN
City
LODI
Zip
95240
CURRENT_STATUS
02
SITE_LOCATION
521 N CHEROKEE LN
P_LOCATION
02
P_DISTRICT
004
QC Status
Approved
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SJGOV\wng
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EHD - Public
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s <br /> T <br /> bgs to the total depth of 60 feet bgs Field observations while drilling MW-3 indicated the <br /> potential presence of petroleum hydrocarbons from approximately 20 feet to the total depth of <br /> 60 feet bgs. The 30, 35, 40, and 45 foot soil samples from each of the wells was submitted for <br /> _quantitative analysis of TPHg and benzene, toluene, ethylbenzene, and xylenes (BTEX) by EPA <br /> Methods 8015M and 8020 respectively Each of the samples contained the requested analytes. <br /> The 40 foot bgs soil sample from MW-2 was the most impacted with laboratory reported <br /> concentrations of TPHg (880 mg/kg), and BTEX: 9.2, 45, 14, and 77 mg/kg respectively). <br /> In June 1991, GAS surveyed the wells relative to a temporary benchmark and measured the <br /> depth to groundwater GAS measured product layers of 6.125 and 7 25 inches in MW-1 and <br /> MW-2 respectively GAS did not report observing an immiscible layer on MW-3; but states <br /> that, "water samples were not collected for analysis." GAS reported that groundwater had <br /> dropped approximately five feet since 1988; and, that the groundwater had a relatively flat <br /> gradient with a slight slope to the south. GAS concluded: <br /> * that offsite migration was a possibility; <br /> * the lateral extent of contamination was not yet determined, <br /> * the water bearing unit at 40 feet should allow recovery of the free product and/or <br /> dissolved contamination, <br /> * that a more northerly source may be contributing to the contamination; and, <br /> * that 3,000 to 4,000 gallons of gasoline were potentially present. <br /> Based on these conclusions, Falcon Energy extracted and removed several thousand gallons of <br /> impacted groundwater. <br /> In January 1994, San Joaquin County Health Services, Environmental Health Department <br /> (SJCEHD) requested that the wells be sampled to assess current groundwater conditions beneath <br /> the site <br /> Dana Booth supervised the resurveying, (re) developing, and sampling of each of the three <br /> existing wells On 7 March 1994 the following groundwater conditions existed beneath the site <br /> * A product layer of 0 03 feet was measured at MW-3 <br /> * The water samples from MW-1 and MW-2 contained TPH9 and BTEX well above <br /> established groundwater goals <br /> * The groundwater gradient was calculated at 3 33 x 10'3 toward the southwest (using a 0.8 <br /> relative density for the product layer). <br /> Based on these results, Dana Booth recommended further assessment and remediation The <br /> following scope of work represents this professional's opinion regarding a potentially effective <br /> method for: <br /> * Assessing site lithology, and <br /> * Evaluating the extent of soil and groundwater contamination <br /> 2 <br />
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