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Staff Report: ACL Order for -2-
<br /> Mr. Frank Guinta, Ms. Shari Guinta
<br /> Mr. James Ramsey and Mrs. Marilyn Ramsey
<br /> Frank's One Stop
<br /> San Joaquin County
<br /> staff time and EAR Account funding will be necessary to continue to provide treated domestic
<br /> water to the affected neighbors, remediate the MtBE plume, and conduct the quarterly
<br /> monitoring and necessary site investigation activities in a timely manner.
<br /> Historical Overview
<br /> On 2 May 1992 San Joaquin County Environmental Heath Department (SJCEHD) submitted
<br /> an Unauthorized Release (Leak) Report for a gasoline leak discovered at the Site fuel
<br /> dispensers during an inspection. At that time, the Site was under the ownership of
<br /> Mr. James and Ms. Marilyn Ramsey, and the underground storage tanks (USTs) were
<br /> operated by Mr. Frank Guinta. SJCEHD directed the Dischargers to investigate the release.
<br /> SJCEHD had previously discovered inconsistencies in prior monthly reconciliation reports of
<br /> fuel supplies delivered to the USTs versus sales of petroleum products, an indicator of a
<br /> leaking UST system. The dispensers were repaired but no investigation was conducted.
<br /> On 16 September 1994, three 1,000-gallon USTs reportedly containing used motor oil were
<br /> removed from the Site. Total Petroleum Hydrocarbons (TPH) as Motor Oil (TPHmo),
<br /> 150,000 in parts per billion (ppb) in soil as micrograms per kilogram (Ng/kg) and TPH as Diesel
<br /> (TPHd), 29,000 pg/kg were detected in soil samples from the excavation.
<br /> On 20 September 1994 one waste oil UST was removed. Metals (including Lead) were
<br /> detected in soil samples from the excavation.
<br /> In February 1995, prior to, and as a part of, the purchase of the bank note for the Site by
<br /> Mr. Guinta, the Bank of Stockton hired consultant Geological Audit Services Inc., to perform a
<br /> soil and groundwater investigation that resulted in a Preliminary Investigation and Evaluation
<br /> Report (PIER). The PIER analytical results reported soil contamination and groundwater
<br /> pollution from the release. Maximum concentrations detected in soil were: TPH as Gasoline
<br /> (TPHg), 1,400,000 pg /kg; benzene, 2,500 pg /kg; toluene, 4,400 pg /kg; ethylbenzene,
<br /> 2,400 pg /kg; and xylenes, 8,300 pg /kg. Maximum grab groundwater concentrations were:
<br /> TPHg, 13,000 pg/L; TPHd, 2,500 pg/L; TPHmo, 110 pg/L; benzene, 83 pg/L; toluene,
<br /> 840 pg/L; ethylbenzene, 230 pg/L; and xylenes, 1,900 pg/L.
<br /> Additional borings advanced in April 1997 and May 1998 confirmed releases of TPHg; TPHd;
<br /> benzene; ethylbenzene; toluene; xylenes; and fuel oxygenates, including methyl tertiary butyl
<br /> ether (MtBE) and tertiary butyl alcohol (TBA), in soil and groundwater.
<br /> During the May 1998 investigation in the area of the former waste oil tank, tetrachloroethylene
<br /> (PCE) was detected in soil beneath, and adjacent to, the waste oil tank excavation. In a letter
<br /> dated 20 August 1998, SJCEHD directed the Dischargers to investigate the PCE detected in
<br /> soil near the waste oil tank. Subsequently, PCE was detected in four groundwater monitoring
<br /> wells on-site from May 1999 until September 2000, when analysis for PCE was discontinued
<br /> with SJCEHD approval after the State Board questioned in their letter of 16 September 2000
<br /> whether there was a non-petroleum source for the PCE.
<br /> In June 1998, Remedy Construction removed two 10,000-gallon diesel USTs and four
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