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ARCO Products Company 2 ARCO#4932,16 East Hardtng Way,Stockton,CA December 10,1999 3N, and T-3 S) at a depth of approximately 15 feet below ground surface (bgs) Soil . samples were analyzed for total petroleum hydrocarbons calculated as gasoline (TPH-g) by EPA Method 8015, benzene, toluene, ethylbenzene, xylenes, (BTEX compounds) and MtBE by EPA Method 8020, fuel oxygenates by EPA 8260, and total lead by EPA 6010 TPH-g was reported in four of six samples at concentrations ranging from 59 mg/kg(T- 3S@15') to 3,400 mg/kg (T-2N@15') Benzene was reported as nondetect mall samples Trace MtBE was also reported in four of the six soil samples at a maximum concentration of 7 mg/kg (T-2S@15') TBA, DIPE, EtBE, TAME, and 1,2 DCA —were not detected in all six samples UST soil analytical data is presented in Table 1 and soil sample locations are shown on Figure 2 Field and laboratory procedures are presented as Attachment B Certified analytical reports and chain-of-custody documentation are presented as Attachment C s Soil Sampling- Product Lines and Dispensers On May 25, 1999, a total of sixteen soil samples from locations, designated PL-1 through PL-6, D-i through D-5, VL-1 through VL-4, and VP-1 were collected from beneath the product lines, dispensers, and vapor lines (Figu.12) Soil samples were analyzed for TPH-g by EPA Method 8015, BTEX and MtBE by EPA Method 8020, fuel oxygenates by EPA Method 8260, and total lead by EPA 6010 • TPH-g was reported in eight of the sixtee samples with concentrations ranging from 14 mg/kg (VP-1@6 5') to 3,000 mg/kg 5@4; Benzene was reported in nine sample at a maximum concentration of 23 mg/kg 5 MtBE was reported in four of t e samples at concentrations ranging from 0 mg/kg (PL-6@3') to130 m 5@4') TBA, DIPE, EtBE, TAME, and 1,2 DCA were not detected in all-samples Pro uct line, dispenser, and vapor line soil analytical data are presented in Table 1 and soil sample locations are shown on Figure 2 Field and laboratory procedures are presented as Attachment B Certified analytical reports and chain-of-custody documentation are presented as Attachment C Remedial Activities - Over-excavation On June 2, 1999, over-excavation was performed in selected areas beneath the product lines and dispensers Soil samples were collect u on the completion of over-excavation and designated D2@8', D3@5 5', D4@11', 5@8 5 PL-5@8 5, and PL-6@5' Approximately 150 tons of soil was over-excavated from the product line and dispenser areas TPH-g was reported in three of the six samples at a maximum concentration of 5,430 mg/kg (D4@11') Benzene was reported in two samples at a maximum concentration 10 6 mg/kg (D4@11') MtBE was reported in two samples at a maximum concentration of 55 5 mg/kg(DS&8 5 • Over-excavation was also performed in the UST complex accommodate the larger new USTs Approximately 631 tons of soil was over-excavated from the UST complex 077 41774 003/PULL DOC