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ARCO Products Company 2
<br /> ARCO#0595,6100 North Hwy 99,Stockton;CA December 10,1999
<br /> Soil Sampling- Product Lines and Dispensers
<br /> • On September 10 and 14, 1999, a total of twenty-one soil samples from nlnteen
<br /> locations, designated PL-1 through PL-6, D-1 through D-5, VL-1 through VL-4, VP-1,
<br /> and OPL-1 to OPL-3 were collected from beneath the product lines, dispensers, vapor
<br /> lines, the vapor pot, and old product lines (Figure 2) Soil samples were analyzed for
<br /> TPH-g by EPA Method 8015, BTEX and MtBE by EPA Method 8020,and fuel
<br /> oxygenates (EtBE, DIPS, TAME, TBA, 1,2,-DCA, and EDB) by EPA Method 8260
<br /> TPH-g was reported in eighteen of the twenty-one samples with concentrations ranging
<br /> from 1 94 mg/kg (PL-5@4 5')to 11,300 mg/kg (OPL-3@4 5') Benzene was reported
<br /> in fifteen samples at concentrations ranging from 0 0316 mg/kg (PL-2@7') to 48 3
<br /> mg/kg (D-4@5') MtBE was reported in fourteen of the samples ranging in
<br /> concentration from 0 110 mg/kg (VL-3@3') to 6 47 mg/kg (D-1@3') TBA, DIPE,
<br /> EtBE, TAME, 1,2 DCA, and EDB were reported as nondetect in all samples Soil
<br /> analytical data are presented in Table 1 and soil sample locations are shown on Figure 2
<br /> Field and laboratory procedures are presented as Attachment B Certified analytical
<br /> reports and chain-of-custody documentation are presented as Attachment C
<br /> Stockpiled Soil Removal
<br /> Approximately 189 tons of soil generated during the removal of the underground
<br /> facilities and the trenching for new piping was stockpiled onsite Composite samples
<br /> • were collected to characterize the soil prior to disposal On September 28, 1999 and
<br /> October 6, 1999, Dillard Environmental Services hauled the soil to BFI Landfill In
<br /> Livermore, CA for disposal Stockpile analytical data is presented in Table 2 Certified
<br /> analytical reports and chain-of-custody documentation are presented as Attachment C
<br /> Soil disposal certificates are included as Attachment D
<br /> SUMMARY OF FINDINGS
<br /> • TPH-g, benzene, and MtBE were detected at maximum concentrations
<br /> of 11,300 mg/kg, 48 3 mg/kg, and 6 47 mg/kg, respectively
<br /> • TBA, DIPE, EtBE, TAME, 1,2 DCA, and EDB were reported as
<br /> nondetect in all samples
<br /> • Approximately 189 tons of soil removed during UST and product line
<br /> upgrade activities were disposed of at BFI Landfill in Livermore, CA
<br /> CONCLUSION
<br /> Based on the data collected during the above-described field work, gasoline
<br /> hydrocarbons have impacted soil in the areas of the product lines and dispensers
<br /> SECOR recommends that a site assessment be conducted to define the extent of
<br /> hydrocarbons in soil beneath the site
<br /> 077 41921 0031PULL.DOC
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