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ARCO Products Company 2
<br /> Former ARCO#4493,205 North Center Street,Stockton,CA July 7,1999
<br /> T-2-W, T-2-E, T--3--W,and T-3-E) at depths ranging from approximately 11 '/2 feet to 13
<br /> •, '/2 feet below ground surface (bgs). Soil samples were analyzed for total petroleum
<br /> hydrocarbons calculated as gasoline (TPH-g) by EPA Method 8015, benzene, toluene,
<br /> ethylbenzene, xylene, (BTEX compounds) and MtBE by EPA Method 8020. Two (T-3-
<br /> W and T-3-E) of the six gasoline UST samplcs were analyzed for fuel oxygenates
<br /> (MtBE, TBA, DIPS, ELBE, and TAME) by EPA Method 8260.
<br /> TPH-g was reported in three of six samples at a maximum concentration of 4.29 mg/kg
<br /> (T-1-E). Benzene was reported in two of six samples at a maximum concentration of
<br /> 0.0122 (T-1-W). MtBE was also reported in two of the six soil samples at a maximum
<br /> concentration of 0.0708 mg/kg (T-2-E). TBA, DIPE, EtBE, and TAME were reported
<br /> as nondetect in all six samples. UST soil analytical data is presented in Table 1 and soil
<br /> sample locations are shown on Figure 2. Field and laboratory procedures are presented
<br /> as Attachment B. Certified analytical reports and chain-of-custody documentation are
<br /> presented as Attachment C.
<br /> Soil Sampling- Product Lines and Dispensers
<br /> On February 24, 1999, a total of fifteen soil samples from fifteen locations, designated
<br /> L-1 through L-8, D-1 through D-4, and VE-1 through VE-3, were collected from
<br /> beneath the product lines, dispensers, and vent lines (Figure 2). Soil samples were
<br /> analyzed for TPH-g by EPA Method 8015 and BTEX and MtBE by EPA Method 8020.
<br /> Four(L-2, L-4, L-5 and D-3) of the soil samples were analyzed for fuel oxygenates
<br /> • (MtBE, TBA, DIPE, EtBE, and TAME) by EPA Method 8260.
<br /> TPH-g was reported in seven of the fifteen samples with concentrations ranging from
<br /> 1.53 mg/kg (L-2-6') to 87.8 mg/kg (L-4-5'). Benzene was reported in one sample at a
<br /> concentration of 0.128 mg/kg (D-1-6'). MtBE was reported in three of the fifteen
<br /> samples at a maximum concentration of 0.194 mg/kg (L-4-5'). TBA, DIPE, EtBE, and
<br /> TAME were reported as nondetect in all fifteen samples. Product line, dispenser, and
<br /> vent line soil analytical data are presented in Table 1 and soil sample locations are shown
<br /> on Figure 2. Field and laboratory procedures are presented as Attachment B. Certified
<br /> analytical reports and chain-of-custody documentation are presented as Attachment C.
<br /> Soil Sampling—Waste-Oil UST Removal
<br /> On April 13, 1999 two soil samples were collected from the waste-oil UST excavation.
<br /> Soil samples were collected from two locations labeled XL-1-2' (below the waste-oil fill
<br /> line) and XL-2-9' (below the waste-oil UST). Soil samples were analyzed for TPH-g,
<br /> total petroleum hydrocarbons calculated as diesel (TPH-d), BTEX compounds and
<br /> MtBE by EPA Method 8015/8020, Oil and Grease by EPA Method 5520, PCBs by EPA
<br /> Method 8270, CAM 5 Metals, and volatile organic compounds (VOCs) by EPA Method
<br /> 8260.
<br /> TPH-g, benzene, MtBE, VOCs, and PCBs were reported as nondetect in both samples
<br /> collected. TPH-d was reported in XL-1-2' at a concentration of 25.6 mg/kg. Oil and
<br /> 70600-022-)1/PULL.Doc
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