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Chevron Products Company 2
<br />Former Chevron Station 9-5775, 301 W Kettleman Lane, Lodi, CA July 24,2000
<br />• SJCEHD Written approval was received by FAX from SJCEHD on July 23, 2000 Letters
<br />from RWQCB and SJCEHD are included as Attachment A
<br />SITE BACKGROUND
<br />Site Setting
<br />The subject site is former Chevron service station located at 301 West Kettleman Lane in Lodi
<br />California Former facilities included four service bays, three dispenser islands, one sales kiosk,
<br />three 10,000 -gallon gasoline underground storage tanks (USTs), one 1,000 -gallon waste oil
<br />UST, one 550 -gallon previously abandoned waste oil UST, and one in -ground hydraulic hoist
<br />All aboveground and subsurface facilities have been removed Locations of previously existing
<br />facilities are shown on Figure 2 The site is currently being developed as a Prime Shine Express
<br />car wash and auto lubricant center
<br />Previous Investigations
<br />The five former USTs, hydraulic hoists, dispenser islands, and associated product piping were
<br />removed on August 24, 1998 Soil samples were collected by G -R from beneath the USTs and
<br />product piping Very low to nondetectable concentrations of petroleum hydrocarbons were
<br />reported in all soil samples from beneath the waste oil USTs, product lines, hydraulic hoist, and
<br />• five of the six samples from the gasoline UST pit Concentrations of Total Petroleum
<br />Hydrocarbons as gasoline (TPHg), Benzene, and methyl tertiary butyl ether (MtBE) were
<br />reported as 14,000 mg/kg, 84 mg/kg, and 56 mg/kg, respectively in the sample collected from
<br />14 5 feet below ground surface (bgs) beneath the eastern end of the middle gasoline UST The
<br />area beneath the eastern end of the middle gasoline UST was excavated from 14 5 to 16 feet
<br />bgs, and a second soil sample was collected Concentrations of TPHg and MtBE were reported
<br />as 880 and 11 mg/kg, respectively, benzene was not detected in this sample Historical soil
<br />analytical data is included in Attachment B
<br />•
<br />On August 31, 1998, the area beneath the eastern end of the middle gasoline UST was over -
<br />excavated from 16 to 22 5 feet bgs Soil samples collected from the base and the eastern wall of
<br />the excavation were reported to contain concentrations of TPHg, benzene, and MtBE at 2,300
<br />mg/kg, 4 1 mg/kg, and 22 mg/kg, respectively
<br />Between January 25 and January 27, 1999, five soil borings were drilled by V&W Drilling at
<br />the subject site, with four of the borings completed as monitoring wells (G -R, Monitoring Well
<br />Installation Report, dated June 2, 1999) The four monitoring wells (MW -1 through MW -4)
<br />were completed to 65 feet bgs Soil samples collected by G -R from the borings had detectable
<br />concentrations of TPHg, benzene, MtBE, ethyl tertiary butyl ether (ETBE), and tertiary amyl
<br />methyl ether (TAME) ranging up to 1,200 mg/kg, 0 81 mg/kg, 110 mg/kg, 13 mg/kg and 0 31
<br />mg/kg, respectively Groundwater samples collected from the monitoring wells had detectable
<br />077 41991 04319-5775PAR doc
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