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1.0 INTRODUCTION <br /> On behalf <br /> O ha f of Rinehart Oil, Inc ,Inc Ramage Environmental has prepared this Environmental Site. <br /> Investigation Report for submittal to San Joaquin County Public Health Services Environmental <br /> Health Division (PHSIEHD) and to the Central Valley Regional Water Quality Control Board <br /> (RWQCB) <br /> ' Thesco a ro osed of work was outlined in Ramage Environmental's Work Plan Well <br /> p p p 9 <br /> Installations and CPT Bonngs, dated May 5, 2000 On June 15, 2000, PHSIEHD approved the <br /> work plan with comments On September 28, 2000, PHSIEHD requested that the existing water <br /> well survey be expanded to include door-to-door mqumes, and sampling of all domestic water <br /> wells within 500-feet of the site Copies of these regulatory correspondences are included in <br /> Appendix A <br /> 1.1 Site Description <br /> The southern portion of the subject site is a gasoline service station located at 1001 E Yosemite <br /> Avenue in the city of Manteca (San Joaquin County), California (Figure 1) The northern portion <br /> of the site is undeveloped raw land The service station is currently operational as a Beacon <br /> station with new underground storage tanks (UST) and dispensing system The former RING <br /> service station included three 10,000-gallon gasoline USTs in a common tank excavation on the <br /> east side of the site and two dispenser islands in the south-central part of the site (Figure 2) The <br /> new USTs were installed in the old UST excavation and the new dispensers were constructed in <br /> approximately the same location as the old dispensers <br /> 1 2 Previous Work <br /> 1 2 1 UST System Removal and Soil Sam lin <br /> During January 1999, Herbst Engineering, Inc removed the three former USTs, two dispenser <br /> islands, and the old canopy structure and supports Due to equipment constraints, soil samples <br /> were not taken immediately after removal of the USTs and dispenser islands On January 28, <br /> 1999, under PHSIEHD observation, Ramage Environmental collected six soil samples from <br /> beneath the former USTs and six soil samples from beneath the former dispensers and canopy <br /> support structures The analytical results from this soil sampling are summarized in Table 1 <br /> i4 <br /> 1 <br />