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• Work Plan Addendum <br /> RAINWATER CAR WASH <br /> 420 West Yosemite Avenue, Manteca, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr Phil Elder,Advanced GeoEnvironmental, Inc (AGE) has prepared this Work <br /> Plan Addendum (WPA) for the Rainwater Car Wash located at 420 West Yosemite Avenue, <br /> Manteca, California (site) The location of the site is illustrated on Figure 1 -Location Map A plan <br /> of the site is illustrated on Figure 2 -Site Plan <br /> The San Joaquin County Public Health Services - Environmental Health Division(PHS-EHD) has <br /> directed the preparation of a WPA to assess petroleum hydrocarbon impacts related to former <br /> underground storage tanks(USTs) at the site This WPA is prepared in accordance with PHS-EHD <br /> and Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines for the <br /> investigation of underground storage tanks (UST) sites <br /> The purpose of the proposed investigation is to evaluate potential petroleum hydrocarbon impacts <br /> to shallow ground water beneath the site This WPA provides a description of the scope of work and <br /> procedures for collection of soil and grab ground water samples <br /> • 2.0. BACKGROUND <br /> The site is located at 420 West Yosemite Avenue, on the southeast comer at the intersection of <br /> Yosemite Avenue and Jessie Street The site is located in a topographically flat area at an elevation <br /> between 30 and 35 feet above mean sea level in Manteca, San Joaquin County California The site <br /> is within the northeast quarter of Section 5, Township 2 South, Range 7 East Mount Diablo Base <br /> and Meridian (Manteca Quadrangle, 7 5-Minute USGS Topographic Series, 1952, photo revised <br /> 1987) <br /> 21 SITE DESCRIPTION <br /> The site is presently operated as a fueling facility and a mini-market One 10,000-gallon. one 6,000- <br /> gallon and one 4,000-gallon gasoline USTs were formerly located on the west section of the <br /> property One 12,000 gallon gasoline UST is presently located on the east section of the property <br /> 22 UNDERGROUND STORAGE TANK REMOVAL <br /> In December 1998, three gasoline USTs (UST Nos I through 3) and associated dispensers/product <br /> . piping were remoN ed from a tN est section of the site (see Figure I) Upon removal, soil samples were <br /> Advanced CeoEn%ironmentat,inc <br />