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r <br /> a c I V S D <br /> . Interim Remediation Work Plan - March 2000 - MAR 2 8 2000 <br /> FLAG CITY CHEVRON 9=ALTH <br /> 6421 Capitol Avenue, Lodi, California �I�i�4RUi��rfL.ly ir-e�. �ice. <br /> PERMIT / SERVICES <br /> 1.0 INTRODUCTION <br /> At the request of Mr Richard Bokides of Flag City Chevron, Advanced Geo Environmental, Inc <br /> (AGE)has prepared this work plan for interim remediation at 6421 Capitol Avenue, Lodi, California <br /> (site) The scope of work includes installation of a six-inch diameter ground water extraction well <br /> with a dedicated low-flow ground water pump and performance of "pump and treat" interim <br /> remediation at the site The location of the site is illustrated on Figure 1 A plan of the site is <br /> illustrated on Figure 2 <br /> On 01 March 2000, the Central Valley Regional Water Quality Control Board (RWQCB) directed <br /> by Cleanup and Abatement Order No 5-00-700 to install and continuously operate a pump and treat <br /> system in the area of the highest ground water methyl tertiary butyl ether (MTBE) contamination <br /> (page 4, section 5) This work plan has been prepared to address this directive <br /> 20. BACKGROUND <br /> The site is located at the northeast intersection of Capitol Avenue and Thornton Road, approximately <br /> 500 feet south of California State Highway 12 and approximately 5 miles west of Lodi, California <br /> (Figure 1) The site is located in the northeast quarter of Section 14, Township 3 North, Range 5 <br /> East, Mount Diablo Base and Meridian (Terminous Quadrangle, 7 5-Minute USGS Topographic <br /> Series, 1978, photo revised 1993) <br /> 21 SITE DESCRIPTION <br /> The property is currently utilized as a Chevron fueling facility and a mini-market The facility <br /> consists of one building structure, a canopied structure for the fuel dispensing area, and four 12,000- <br /> gallon petroleum USTs <br /> 2 2 UNDERGROUND STORAGE TANK REMOVAL <br /> On 31 March 1995, four 12,000-gallon gasoline USTs and one 12,000-gallon diesel UST were <br /> replaced at the site During excavation activities, ground water was encountered in the UST cavity <br /> at approximately 8 feet below site grade (bsg) Soil and ground water samples were collected from <br /> the sidewalls of the excavation and submitted to a Department of Health Services (DHS)-certified <br /> laboratory for analysis of petroleum hydrocarbons Dissolved total petroleum hydrocarbons <br /> quantified as gasoline and diesel (TPH-g and TPH-d) were detected in grab ground water samples <br /> at concentrations ranging as lugh as 18,000 micrograms per liter(4g/l) Dissolved benzene, toluene, <br /> Advanced GeoEm tronmental,Inc <br />