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05/25/2001 14 24 2054673. AGE ST©CKTON PAGE 03 <br /> Interim Remediation Work Flan - June 2001 <br /> RA NWA TER 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 GxeoEnvironmmtal, Inc (AGE) <br /> has prepared this work plan for intenm remediation at 420 West Yosernxte Avenue, Manteca, <br /> Califomia (site) The scope of work includes installation of a dechcated low-flow ground water <br /> "pump-and-treat" interim remodlatton system at the site The location of the site is illustrated on <br /> Figure l A.plait of the site is illustrated on Figure 2 <br /> On 02 March 2001, the Cahfornta Regional 'Nater Quality Control Board (RWQCB) - Central <br /> Valley Region directed by letter to install and continuously operate a pump and treat system in the <br /> area of the,bighest ground water methyl teztma�ry butyl ether(MTBE)contanunatxon (Appendix A) <br /> This interim remediation work plan has been prepared to address this directive <br /> 2.4. BACKGROUND <br /> The site is located at 420 West Yosemite Avenue, at the southeast corner ofYoseimTe Avenue and <br /> Jessie Street in a topographically flat area w an elevdtrm between 30 a-ad 35 feet above mean sea <br /> level in Manteca, San Tuagwn County, Califomra The site is w1th m the northeast quarter of Section <br /> 5, Tmvnship 2 South, Range 7 East Mount Diablo Base and Mendian ('Manteca Quadrangle, 7 5- <br /> Min-Lite L}SGS Topograpbic Senes, 1552, photo revised 1987) <br /> 2 1 Sly DESCRIPTIO <br /> The site is}presently operated as a fueling facility and a mini-market One. 10,000-gallon UST, one <br /> 5,000-gallon UST and one 4,000-gallon gasolme, UST were formerly located on the west section of <br /> the property One 12,000 gallon gasoline UST is presently located on the east section of the property <br /> 2 2 UNDERGROUND SIURAGI_ TANK REMOVAL <br /> Tn December 1998, three gasoline USTs (UST dos 1, 2 and 3) and associated dispensers/product <br /> piping were removed from a west section of the site (see Figure 2) Upon remov al, soil samples were <br /> collected from the floor of the exca�ation and beneath product piping Total petroleum hydrocarbons <br /> quantiftd as gasoline(TPH-g)were detected to soil samples collected beneath the east ends of the <br /> three USTs at concentrations ranging up to 2,640 milligram-, per kilogram(mgtkg), in soil samples <br /> beneath the west encu of the USTs at c,oncexitranons ranging up to 25 rug/kg and ,n tio,l samples <br /> Tcnieattt product Impinu at co=-nil almn,; (anMtnc, ro 8,000 mg/kS <br /> 4 d van re A Geak""ra n MI-ntal,I n g <br /> t <br />