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• /` 1 T <br /> F00T'0-AJ'U1 A, <br /> = ENGINEER�,G <br /> 12793 PADDY CrfPFK LANE LODI CA 95240 <br /> PH {209) 368-938 1, FAX T2 367-1163 <br /> //-' ,5,5 <br /> May 12, 2000 <br /> Mr Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 388 <br /> Stockton, CA 95201 <br /> Subject Connell Motor Truck Co - 2211 N Wilson Way Stockton CA 95205 <br /> Site Code 39-1304 <br /> RE Phase 2 Work Plan for Vertical and Horizontal Delineation of Plume - Monitoring Wells on the <br /> Eastside of Wilson Way <br /> Dear Mr Infurna <br /> Please find below the Work Plan for additional soil borings and monitoring wells as we verbally <br /> discussed on May 2, 2000 <br /> HISTORY OF UST REMOVAL AND OVER-EXCAVATION <br /> On June 11, 1998, the three USTs on this site were removed by Jim Thorpe Oil, Inc of Lodi, California <br /> under PHS/EHD permit and oversight Asper the work plan for the removal,soil samples were extracted <br /> and analyzed for BTEX, TPHgas, TPHdiesel, and Oxygenates (see summary of results attached) The <br /> analysis indicated the soil underand nearthe dispensers was contaminated with both Gasoline and Diesel <br /> The soil underneath and surrounding the three USTs was analyzed as non-detect for all com pounds The <br /> tank excavation was backfilled with onsite pea gravel <br /> Over-excavation ofthe dispensef area was started and suspended on December 10, 1998 U,ith less t` an <br /> 50% of the planned work completed The excavated area was backfilled with pea-gi avel and vie <br /> excavated soil was stockpiled on the site Work was suspended due to the discovery of a large volume <br /> of contaminated soil found below and adjacent to the pump islands The test results from Sherwood Labs <br /> indicated that the petroleum contamination was old and highly degraded Due to the extent of the <br /> petroleum contamination,the PHS-EHD ordered a delineation of the contaminating plume and a ground <br /> water investigation <br /> To this date three soil bores with monitoring wells have been installed These wells have partially defined <br /> the upper limits of the contamination in the areas of the fuel dispensing islands <br /> 1 <br />