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Table 1 j <br /> Site Conceptual Model <br /> .foe's Truck Plaza <br /> 15600 Harlan Road <br /> Lathrop, California <br /> Site Reconnaissance Site Investigation Feasibili Testigg Remediation Activities <br /> 1 Source identified as former gasoline and 1 Advanced 7 exploratory soil borings (to 12 5 feet bgs) in None to date None to date <br /> diesel tanks located in northern and southern January 1997 <br /> I <br /> underground storage tank pits 2 Former UST's removed in February and October 1998 <br /> 2 DWR records search 3 Advanced 25 exploratory soil borings (to 20 feet bgs) <br /> 3 Drive-by reconnaissance of site vicuuty 4 Installed 9 shallow wells (screened between 5 and 20 feet bgs) <br /> 4 Underground utility survey 5 Installed 1 deeper well(screened between 20 and 30 feet bgs) <br /> What has 5 Review of San Joaquin county files 6 Lateral and vertical extent of upper sandy unit adequately <br /> been done? characterized <br /> 7 Lateral and vertical extent of TPHD, TPHG, and BTEX <br /> adequately characterized in soil <br /> 8 Quarterly groundwater monitoring and sampling iodated in <br /> February 2000 <br /> None 1 Complete evaluation of the lateral and vertical extent of hard 1 Aquifer pump test for upper sand layer To be determined after completion of feasabilrty <br /> clay layer 2 Dual phase extraction test for upper sand layer testing <br /> 2 Evaluate the lateral and vertical extent of the lower sand and <br /> clay layers <br /> 3 Complete evaluation of lateral extent of dissolved MTBE <br /> What needs plume east of the site l <br /> to be done? 4 Evaluate soil or groundwater impact within the lower sand and <br /> clay layers <br /> l <br /> I <br /> Joes Truck SCM table <br />