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' modified 8015 and 8020 or 602 No analytes were detected in the sample above the method
<br /> Yt p
<br /> reporting limits
<br />' On 02 June 1999 based upon PHS-EHD direction AGE submitted an addendum to the
<br /> aforementioned work plan to remove dispenser island/associated piping and perform soil sampling
<br />' prior to in-place abandonment of the USTs
<br />' On 18 June 1999, AGE decontaminated and removed the product piping and advanced angled soil
<br /> probe borings for soil sampling prior to UST abandonment and product piping removal Two soil
<br /> samples,SB-1-20'and SB-2-20'were collected approximately 20 feet below surface grade(bsg)near
<br /> the bottom of the USTs and five soil samples were collected beneath the piping at an approximate
<br /> depth of 2-3'bsg extending from the dispenser island to the USTs and are identified as P-1,P-2,P-3,
<br /> P-4,and P-5 TPH-g,BTEX,and lead were reported detected through laboratory analysis in the soil
<br />' samples collected from soil borings SB-1 and SB-2 at maximum concentrations of 760 mg/kg TPH-
<br /> g, 112 gg/kg benzene, 2,370 pg/kg toluene, 1,230 ug/kg ethyl-benzene, 2,510 µg/kg total xylenes
<br /> and 6 0 mg/kg lead TPH-g,Toluene,Ethyl-benzene,total xylenes and lead were reported in the soil
<br />' samples collected from locations P-1 through P-5 at maximum concentrations 6,400 mg/kg TPH-g,
<br /> 43 µg/kg toluene, 600 µg/kg ethyl-benzene, 4,360 µg/kg total xylenes and 61 0 mg/kg lead
<br /> Due to field decisions made by AGE and PHS-EHD, on July 9, 1999 AGE removed 3 aviation
<br /> gasoline USTs (Tanks #39-1808-01, 5,000 gallon storage capacity, #39-1808-02, 4,000 gallon
<br /> capacity, #39-1808-03, 4,000 gallon capacity) from the site instead of in-place abandonment The
<br /> tanks were certified to be properly cleaned and free of hydrocarbon residue by EHD and transported
<br /> off the site by West Coast Equipment of Turlock, California TPH-g, BTEX, MTBE and lead were
<br /> reported detected through laboratory analysis in soil samples collected from the former UST pit at
<br />' maximum concentrations of 103 mg/kg TPH-g, 74 �tg/kg benzene, 1,093 µg/kg toluene, 443 pg/kg
<br /> ethyl-benzene, 2,182 pg/kg total xylenes, 27 µg/kg MTBE and 324 mg/kg lead Lead was the only
<br /> constituent of concern reported detected in the stockpiles and dispenser locations at a maximum
<br /> concentration of 35 mg/kg
<br />' On 18 November 1999, PHS-EHD placed the site in their Local Oversight Program and required a
<br /> work plan be submitted to investigate contamination at the site
<br />' On 23 February 2000, AGE performed a preliminary site assessment to investigate a suspected
<br /> unauthorized release of petroleum hydrocarbons to soil and ground water at the site The laboratory
<br /> results of analyses of samples confirmed the presence of a petroleum hydrocarbon-impact to soil and
<br />' ground water in the former UST area The San Joaquin County Environmental Health Department
<br /> (EHD) subsequently required an investigation to determine the extent of petroleum hydrocarbon-
<br /> impact to soil and ground water
<br />' On 21 and 22 June 2000,three ground water monitoring wells were installed (MW-1 through MW-
<br /> 3)to 85 feet below surface grade Quarterly ground water monitoring was initiated on 05 July 2000
<br />' and continued through 31 May 2002
<br /> �) On 12 December 2001, two soil borings (B-5 and B-6) were advanced at the site using a CME-75
<br />' high-torque drill rig Soil boring procedures were performed as outlined in the AGE-prepared Work
<br /> Plan Addendum -June 2001, and as approved by the EHD by letter dated 12 June 2001
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