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GETTLER - RYAN INc. <br /> � <br /> CLOSURE REPORT <br /> at <br /> Chevron Service Station #9-1848 <br /> 1257 Yosemite Avenue <br /> Manteca, California <br /> Report No 346392.02 <br /> INTRODUCTION <br /> At the request of Chevron Products Company(Chevron), Gettler-Ryan Inc (GR) has prepared <br /> this report requesting regulatory closure for Chevron Station#9-1848 located at 1257 Yosemite <br /> Avenue in Manteca, California This Closure Report presents the data requested in the <br /> Tri-Regional Board Staff Recommendations For Preliminary Investigation And Evaluation of <br /> Underground Tank Sites, Appendix B, Request For Closure, dated March 1, 1994 <br /> Site Description <br /> The site is an active service station Iocated north of State Route 120 (Yosemite Avenue) in <br /> Manteca, Calitornia The current facilities consist of a station budding, two dispenser <br /> islands, and three underground storage tanks (USTs) that share a common pit near the east <br /> boundary of the subject site The topography in the vicinity is flat lying at an elevation of <br /> approximately 27 feet above mean sea Ievel (MSL) Locations of pertinent ,ite features are <br /> shown on Figure 2 <br /> SUMMARY OF ENVIRONMENTAL WORK <br /> Locations of the former UST excavations, groundwater monitoring wells, and soil boring <br /> locations are shown on Figure 2 Soil chemical analytical data are summarized in Appendix <br /> A Historical groundwater monitoring and chemical analytical data aie summarized in <br /> Appendix B A chronological synopsis of environmental investigations and remedial activities <br /> performed at the site is presented below <br /> • In June 1991, GeoStrategies Inc (GSI) advanced four exploratory soil borings in the <br /> vicinity of the present gasoline underground storage tank (UST) excavation Soil <br /> samples collected indicated the presence of petroleum hydrocarbons <br /> • 346392 02 cl <br /> 6747 Sierra Court , Suite J - Dublin , California 94568 - ( 925) 551 -7555 <br />