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SITE INFORMATION AND CORRESPONDENCE_1985-1997
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PR0522692
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SITE INFORMATION AND CORRESPONDENCE_1985-1997
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Last modified
4/2/2020 2:47:19 PM
Creation date
4/2/2020 2:16:02 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
SITE INFORMATION AND CORRESPONDENCE
FileName_PostFix
1985-1997
RECORD_ID
PR0522692
PE
2957
FACILITY_ID
FA0015465
FACILITY_NAME
FORMER MONTGOMERY WARDS AUTO SRV CTR
STREET_NUMBER
5400
STREET_NAME
PACIFIC
STREET_TYPE
AVE
City
STOCKTON
Zip
95207
APN
10227008
CURRENT_STATUS
01
SITE_LOCATION
5400 PACIFIC AVE
P_LOCATION
01
P_DISTRICT
002
QC Status
Approved
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EHD - Public
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Mr. Theodore I. Wittmayer, Attorney at Law September 28, 1992 <br /> Stone Brothers and Associates Page 5 <br /> • The absence of hydrocarbon presence in borings B-7 and B-8 provide evidence that the <br /> hydrocarbon compounds found in shallow soil samples collected near the sewer line south <br /> of the auto shop are not linked to the hydrocarbons found to at least 50 feet in boring B- <br /> 6, situated adjacent to the former underground gasoline storage tank location. Therefore, <br /> the hydrocarbon presence in boring B-6 is most likely the result of a leak or spill from <br /> the former tanks. <br /> • The presence of a "clean" boring (B-7) provides a lateral boundary to the tank-related <br /> hydrocarbon presence. The lateral boundary may be interpreted as extending around the <br /> southern end of the former tank location and up the western side. The lateral extent of <br /> hydrocarbon presence is reasonably well established at this time. <br /> • The vertical extent of compound presence is not well defined at this time due to the <br /> presence of hydrocarbon compounds in the deepest sample from boring B-6. <br /> Area 2 <br /> • Borings B-9 and B-10 were placed near the product piping which connected to Fuel <br /> Island No. 2. No significant hydrocarbon presence was found in B-10. Boring B-9, <br /> however, contained elevated levels of TPH-G and other compounds between 15 feet and <br /> the total depth of 30 feet below grade. TPH-G and compounds such as toluene, <br /> ethylbenzene and xylenes are typically found in gasoline. No benzene was found in any <br /> of the samples from B-9. <br /> • EAI stated that based on analysis of carbon chain breakdown, gasoline was not the <br /> contaminant. Chemical "fingerprinting" done by the laboratory suggests that the <br /> compounds in the soil bear a resemblance to the heavy naphtha, a solvent. While there <br /> is not enough information in the report to fully evaluate this contention, it seems more <br /> likely that gasoline would be found in the soil beneath a gasoline pipeline and a fuel <br /> dispenser rather than a heavy solvent not currently known to be commercially used at the <br /> site. <br /> • The lateral and vertical extent of the compounds in B-9 have not been fully established. <br /> The EHD will probably require additional investigation in this area. <br /> • Based on the results of soil sampling along the product piping which extends from the <br /> fuel islands to the former tank location, there is no detectable hydrocarbon impact to the <br /> soil from the product piping except in the vicinity of PL-7 and B-9. <br /> RNS�'A mYR WP <br />
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