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containing USTs, removed in 1987, some definition of lateral extent of contamination, <br /> identification of hydrocarbon contaminants (note no MTBE or fuel Oxygenates DIPE, <br /> ETBE nor TA was detected), locating a "shallow water body', and a request by Rafael L <br /> Gallardo,Registered Geologist, that PHS/EHD consider granting site closure <br /> Since Gallardo's work additional sod and groundwater sampling have continued under <br /> D K Barber P E & Associates guidance Six "permanent "shallow ground water wells <br /> were installed in 2002 and have been monitored quarterly <br /> Tabulated results and review 2 by Stellar Environmental Solutions, Berkeley, CA were <br /> submitted to PHS/EHD September 15, 2003 <br /> This work plan addendum proposes further definition of the plume boundary <br /> Partial recovery of cleanup costs is possible through the State Water Resources Control <br /> Board (UST Fund) Reasonable supportive records must be presented to the UST Fund <br /> manager to recover allowed costs <br /> 1.2 Site Contamination <br /> A limited definition of the remaining petroleum hydrocarbon contamination was derived <br /> from the Gallardo, May 24, 1999 report Pollutant levels up to 30,000 mg/kg of diesel <br /> range and 18,000 mg/kg of kerosene range petroleum hydrocarbon product were <br /> reported in the vicinity of the former 20,000 GA USTs Soil borings B-3 and B-5 were <br /> clean This would be reasonable if the source were close to B-1 and the groundwater <br /> surface gradient was to the NNE Continued study confirms the northerly migration Most <br /> recent findings as of September 2003 are included in the attached tabulation Ground <br /> water contamination ranges between < 0 050 and 1 200 g/L of total extractable <br /> hydrocarbons in the diesel-kerosene class (TEHd) BTEX and gasoline products have not <br /> been detected in monitoring wells and are no longer being tested as of September 2003 <br /> The most recent September 2003 sampling laboratory findings are included herewith <br /> Reference ATTACHMENT 4, EXTRACTS FROM ANALYTICAL LABORATORY <br /> FINDINGS-September 23, 2003 Ground water contamination by TEHd has continued to <br /> 2-SITE CLOSURE ASSESSMENT REPORT'September 9 2003 Stellar Environmental Solutions <br /> 1-2 <br />