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' Interim Remediation Work Plan - June 2001 <br /> ' RAINWATER CAR WASH <br /> 420 West Yosemite Avenue, Manteca, California <br /> ' 1.0 INTRODUCTION <br /> ' At the request of Mr Phil Elder of Rainwater Car Wash,Advanced GeoEnvironmental, Inc (AGE) <br /> has prepared this work plan for interim remediation at 420 West Yosemite Avenue, Manteca, <br /> California (site) The scope of work includes installation of a dedicated low-flow ground water <br /> ' "pump-and-treat" interim remediation system at the site The location of the site is illustrated on <br /> Figure I A plan of the site is illustrated on Figure 2 <br /> ' On 02 March 2001, the California Regional Water Quality Control Board (RWQCB) - Central <br /> E) <br /> Valley Region directed by letter to install and continuously operate a pump and treat system in the <br /> area of the highest ground water methyl tertiary butyl ether(MTBcontamination (Appendix A) <br /> 1 This interim remediation work plan has been prepared to address this directive <br /> ' 20 BACKGROUND <br /> The site is located at 420 West Yosemite Avenue, at the southeast corner of Yosemite Avenue and <br /> Jessie Street in a topographically flat area at an elevation between 30 and 35 feet abo-vc meal, st.a <br /> lc'�el tit Manteca, San Joaquin County, California The site is within the northeast quarter of Section <br /> ' 5, Township 2 South, Range 7 East, Mount Diablo Base and Mendian (Manteca Quadrangle, 15- <br /> Minute USGS Topographic Series, 1952, photo revised 1987} <br /> ' 2 1 SITE DESCRIPTION <br /> ' The site is presently operated as a fueling facility and a mini-market One 10,000-gallon UST, one <br /> 6,000-gallon UST and one 4,000-gallon gasoline UST were formerly located on the west section of <br /> the property One 12,000 gallon gasoline UST is presently located on the cast section of the property <br /> 22 UNDERGROUND STORAGE TANK REMOVAL <br /> In December 1998, three gasoline USTs (UST Nos 1, 2 and 3) and associated dispensers/product <br /> piping were removed from a west section of the site(see Figure 2) Upon removal, soil samples were <br /> collected from the floor of the excavation and beneath product piping Total petroleum hydrocarbons <br /> quantified as gasoline(TPH-g) were detected in soil samples collected beneath the east ends of the <br /> three USTs at concentrations ranging up to 2,600 milligrams per kilogram m <br /> ' $�' (mg/kg), m soil samples <br /> beneath the west ends of the USTs at concentrations ranging up to 25 mg/kg, and in soil samples <br /> beneath product piping at concentrations ranging to 8,000 mg/kg <br /> Advanced GeoFnvironmental ine <br />