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Chevron Products Company 3
<br />Former Chevron Service Station #9-5775, 301 West Kettleman Lane, Lodi, Cahfornm June 5, 2001
<br />[now renamed as MW -9A]), four soil vapor extraction wells (VE -1 through VE -4), one
<br />groundwater extraction well (EX -1), and two soil borings (SB -2 and SB -3) were installed by V&W
<br />Drilling Soil samples collected from the borings were reported to contain concentrations of
<br />TPHg, benzene, and MtBE up to 1,740 mg/kg, 446 mg/kg, and 100 mg/kg, respectively The
<br />highest concentrations were reported in samples from borings EX -1 and VE -1 located in the area
<br />of the former USTs Groundwater samples collected from the monitoring wells and extraction
<br />well were reported to contain concentrations of TPHg, benzene, MtBE, EtBE, and TAME up to
<br />51,000 ug/l, 39,000 ug/l, 720,000 ug/l, 18,000 ug/l, and 6,000 ug/l, respectively
<br />GR. Site Update for Former Chevron Station #9-5775 (July 14, 2000. Between April 6 and
<br />June 29, 2000, interim remediation consisting of weekly pumping of water from well EX -1 was
<br />conducted by G -R During weekly well pumping, approximately 2,635 gallons of water were
<br />removed from the site Concentrations of MtBE in groundwater samples from well EX -1,
<br />collected on April and June 29, 2000, decreased from 720,000 ug/1 to 325,000 ug/l
<br />On July 3, 2000, the continuous operation of the interim soil vapor extraction (SVE) system and
<br />ground water extraction (GWE) remediation system was initiated at the site.
<br />SECOR, Problem Assessment Report (July 24 20OOI Between June 14 and July 7, 2000, ten
<br />groundwater monitoring wells (MW -5B, MW -8B, MW -10A and B, MW -11A and B, MW -12A
<br />and B, MW -13, and MW-14/EX-2) were installed at the site by Cascade Drilling. Monitoring
<br />wells MW -5B, MW -8B, MW-lOB, MW -11B, and MW -12B were completed to approximately 90
<br />I& feet bgs Monitoring wells MW -10A, MW -11A, MW -12A, MW -13, and MW-14/EX-2 were
<br />completed to approximately 65 feet bgs Concentrations of petroleum hydrocarbons and fuel
<br />oxygenates were not reported in soil samples collected from monitoring wells MW -5B, MW -8B,
<br />MW-l0A and B, MW -11A and B, MW -12A and B, and MW -13 MtBE was reported at a
<br />concentration of 0 189 mg/kg in the sample collected from 65 feet bgs in monitoring well
<br />MW-14/EX-2
<br />TPHg and benzene, toluene, ethyl -benzene, and xylenes (BTEX compounds) were not reported in
<br />groundwater samples collected from monitoring wells MW -5B, MW -8B, MW-l0A and B, MW -
<br />1 lA and B, MW -12A and Band, MW -13 Benzene was reported in monitoring well MW-14/EX-
<br />2 at a concentration of 102 ug/l. MtBE was reported in monitoring wells MW -5B, MW -10B, and
<br />MW-14/EX-2 at concentrations of 160 ug/1, 5 2 ug/1, and 1,100 ug/l, respectively Concentrations
<br />of EtBE were reported in monitoring wells MW -5B and MW-14/EX-2 at concentrations of 14 ug/1
<br />and 120 ug/l, respectively Ethanol was detected in monitoring wells MW-lOB and MW -12B at
<br />concentrations of 1,400 ug/l and 2,000 ug/1, respectively
<br />0
<br />San Joaquin Co. Public Works Department, Frank Beeler, verbal communication Jul
<br />2000. Sampling of Well 12 for petroleum hydrocarbons was initiated in 1996 (San Joaquin Co.
<br />Public Works Department, Frank Beeler, verbal communication, July 2000) The well was
<br />sampled annually in 1996 and 1997, quarterly during 1998, and monthly in 1999 and 2000 No
<br />I 1Chevron1957751ParFrp19-5775PARFRP2 doc
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