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Soil Sampling Report- Former Chevron Service Station 49-5775
<br />November 10, 1998
<br />oil UST Upon removal, the USTs were visually inspected for evidence of failure Holes were not observed
<br />in the USTs The USTs were transported under hazardous waste manifests from the site and disposed of
<br />by Ecology Control Industries (ECI) of Richmond, California
<br />Lmuts of the former UST excavations are shown on Figure 2 Backfill materials m the former UST
<br />excavations consisted primanly of pea gravel %vith sand Native soil in the UST and piping excavations
<br />consisted of silty sand and sandy silt GroundAater was not encountered in the excavations Per the
<br />direction of Mr Trevena of the SJCEHD six soil samples, labeled A1(14 5), A2(14 5), B1(14 5), B2(14 5),
<br />C 1(14 5), and C2(14 5), were collected from beneath the forrner gasoline USTs at approximate depths of
<br />14 5 feet bgs Due to obvious hydrocarbon odor noted in the soil sample B1(14 5), additional excavation
<br />was performed in the vicinity of the soil sample B1(14 5) to a depth of approximately 16 feet bgs One
<br />additional soil sample, labeled B1(16), was collected from beneath the location of sample 131(14 5) at a
<br />depth of approximately 16 feet bgs Two soil samples, labeled WO 1(9) and W02(9), were collected from
<br />beneath the waste oil UST at depths of approximately 9 feet bgs One soil sample, labeled FWO1(8 5)
<br />was collected from beneath the former abandoned waste oil tank at a depth of approximately 8 5 feet bgs
<br />Four soil samples, labeled P1(5 5), P2(5 5), P3(5 5), and P4(5), were collected from beneath the former
<br />product piping at depths of about 5 0 to 5 5 feet bgs One soil sample, labeled H(7 5), was collected from
<br />the former hydraulic hoist excavation at a depth of approximately 7 5 feet bgs Native soil in the vicinity
<br />of former hoist excavation consisted primarily of sandy silt Soil sample locations are shown on the
<br />attached Figure 2
<br />All soil samples collected from beneath the former gasoline USTs and product piping were analyzed for
<br />Total Petroleum Hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, and xylenes (BTEX),
<br />methyl tert-butyl ether (MTBE), oxygenate compounds by EPA method 8260, and total lead The soil
<br />samples collected from beneath the former waste oil USTs were analyzed for TPHg, BTEX, Total
<br />Petroleum Hydrocarbons as diesel (TPHd), Halogenated Volatile Organic Compounds (HVOCs), Semi -
<br />Volatile Organic Compounds (SVOCs), Polychlonnated Biphenyls (PCBs), and the metals cadmium,
<br />chromium, lead, nickel, and zinc The soil sample H(7 5) from beneath the former hoist was analyzed for
<br />Total Petroleum Hydrocarbons as hydraulic oil (TPHho)
<br />Soil samples A2(14 5), B2(14 5), CI(14 5) and C2(14 5) from beneath the former gasoline USTs showed
<br />non-detectable concentrations of TPHg, benzene, MTBE and oxygenate compounds, except for 10 ppm
<br />gasoline and unidentified hydrocarbons >C7 (reported by the laboratory as TPHg) detected in sample
<br />C2(14 5), and 0 0089 ppm benzene detected in sample B2(14 5) Sample A1(14 5) contained TPHg at 11
<br />ppm with non-detectable concentrations of MTBE and oxygenate compounds However, elevated TPHg
<br />concentrations were detected in soil samples B1(14 5) and Bl(16) at 14,000 ppm and 880 ppm,
<br />respectively Lead was not detected in all soil samples from beneath the former gasoline USTs
<br />Soil samples from the former product piping trenches showed non-detectable concentrations of TPHg,
<br />benzene, lead, MTBE or oxygenate compounds, except for 0 016 ppm benzene detected in sample P1(5 5)
<br />Soil samples from beneath the former waste oil USTs showed non-detectable concentrations of TPHg,
<br />benzene, ethylbenzene, TPHd, HVOs, SVOs, PCBs, cadmium and lead, except for 12 ppm unidentified
<br />. hydrocarbons >C16 (reported by the laboratory as TPHd) detected in sample W02(9) Soil sample H(7 5)
<br />from beneath the former hoist showed non-detectable concentration of TPHho
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