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' Additional Assessment and Feasibility Testing Work Plan <br /> • TRACY MARINE SALES <br />' 2353 Toste Road, Tracy, California <br />' 1.0. INTRODUCTION <br /> At the request of Mr Joe Toste, Jr , Advanced GeoEnvironmental, Inc (AGE) has prepared the <br />' enclosed work plan for 2353 Toste Road,Tracy, Sacramento, California(site) The location of the <br /> site is illustrated on Figure 1 A plan of the site is illustrated on Figure 2 <br />' This workplan has been prepared in accordance with Central Valley Regional Water Quality Control <br /> Board (CVRWQCB) guidelines for the investigation of underground storage tanks (UST) sites <br /> The purpose of this work plan is to evaluate feasibility and effectiveness of ground water extraction <br /> for remediation of hydrocarbon-impacted ground water at the site This work plan provides a <br />' description of the scope of work and procedures for the installation of one ground water extraction <br /> well, one observation well and the performance of a ground water extraction (pump) test <br /> 2.0 BACKGROUND <br /> • The following are milestone events in the soil and ground water investigation at the site <br /> • On 31 October 1996 two USTs, dispensers and piping were removed from the site, <br /> • On 24 June 1998, nine soil probe borings (B1 through B9)were advanced at the site, <br /> 0 In November 1999 eight ground water monitoring (MW-1 through MW-8) wells were <br /> installed, <br /> On 12 March 2001, four soil borings (CPT-1 through CPT-4)were advanced at the site, <br /> r • On 23 March 2001 three ground water monitoring wells (MW-9 through MW-11) were <br /> installed on-site <br /> IThe approximate lateral and vertical extent of impacted soil and ground water has been defined by <br /> the installation of soil borings and the current monitoring well network as shown on Figures 3 <br /> through 7 <br /> A silt layer underlies the site to a depth of approximately 12 feet bsg, which is underlain by a sand <br /> and gravelly sand at depths between 12 to 20 feet bsg Ground water currently occurs at a depth of <br /> approximately 7 feet bsg <br /> Additional background information can be found in the AGE-prepared documents,Additional Site <br /> . Assessment Work Plan, dated 26 September 2000 and Monitoring Well Installation and Quarterly <br /> Advanced CeoEnvironmental,Inc <br />