|
•
<br />Chevron Products Company 2
<br />Chevron Station t19-5775 301 N hettieman L1ne Loch C A Au,ust 25 2000
<br />SITE BACKGROUND
<br />Site Description
<br />The subject site is former Chevron service station located at 301 West Kettleman Lane in
<br />Lodi, California Former facilities included four service bays, three dispenser islands,
<br />one sales kiosk, three 10,000 -gallon gasoline underground storage tanks (USTs), one
<br />1,000 -gallon waste oil UST, one 550 -gallon previously abandoned waste oil UST, and
<br />one in -ground hydraulic hoist All known aboveground and subsurface facilities have
<br />been removed from the site Locations of previously existing facilities are shown on
<br />Figure 2 The site is currently being developed as a Prime Shine Express car wash and
<br />auto lubricant center
<br />Previous Investigations
<br />The five former USTs, hydraulic hoists, dispenser islands, and associated product piping
<br />were removed on August 24, 1998, by Musco Excavators (Gettlet-Ryan, Soll.Samphrrg
<br />During Underground Slotage lank cind Piping Rentov61, dated November 10, 1998)
<br />Soil samples were collected by Gettler-Ryan (G -R) beneath the USTs and product
<br />piping Very low to nondetectable concentrations of petroleum hydrocarbons were
<br />reported in soil samples collected below the waste oil USTs, product lines, hydraulic
<br />hoist, and five of the six samples from the gasoline UST pit Concentrations of total
<br />petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, and methyl tertiary butyl
<br />ether (MtBE) were reported as 14,000 mg/kg, 84 mg/kg, 1,500 mg/kg and 56 mg/kg,
<br />respectively, in the sample collected from 14-112 feet below ground surface (bgs) below
<br />the eastern end of the middle gasoline UST The area beneath the eastern end of the
<br />middle gasoline UST was excavated from 14-112 to 16 feet bgs, and a second soil sample
<br />was collected Concentrations of TPHg, toluene, and MtBE were reported as 880, 52,
<br />and 1 l mg/kg, respectively, benzene was reported as not detected in this sample
<br />Historical soil analytical data is included as Attachment B
<br />On August 31, 1998, the area beneath the eastern end of the middle gasoline UST was
<br />over -excavated from 16 to 22-112 feet bgs Soil samples collected from the base and the
<br />eastern wall of the excavation were reported to contain concentrations of TPHg,
<br />benzene, and MtBE at 2,300 mg/kg, 4 1 mg/kg, and 330 m« kg, respectively
<br />Between January 25 and January 27, 1999, five soil borings were drilled by V&W at the
<br />subject site, with four of the borings completed as monitoring wells (G -R, Morwol ing
<br />Well Installation Report, dated June 2, 1999) The four monitoring wells (MW -
<br />through MW -4) were completed to 65 feet bgs Soil samples collected by G -R from the
<br />borings had reported concentrations of TPHg, benzene, MtBE, and ethyl tertiary butyl
<br />ether (ETBE) up to 1,200 mg/kg, 0 81 mg/kg, 78 mg/kg, and 1 3 mg/kg, respectively
<br />Groundwater samples collected from the monitoring wells had reported concentrations
<br />077 41991 043/FRP
<br />
|