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F00THI1111L <br />. ENGINEERING <br /> 12793 PADDY CREEK LANE LC]Dl, CA 95240 <br /> PH (209) 368-9381 FAX (209) 367-1163 <br /> c <br /> C <br /> July 18, 2000 rev August 4, 2660 <br /> Mr Michael Infurna <br /> San Joaquin County Public Health Services ' <br /> Environmental Health Division <br /> P O Box 388 <br /> Stockton, CA 95201 ^.' , ', T_- <br /> Subject Connell Motor Truck Co - 2211 N Wilson Way Stockton CA 95205 <br /> I <br /> ly�Y4 <br /> poo <br /> Site Code 39-1304 � <br /> RE Report on Phase 1 Work Plan for Vertical and Horizontal Delineation of Plume - Monitoring Well <br /> Sample Analysis - Second Quarter 2000 <br /> Dear Mr Infurna <br /> Please find below the Groundwater Sample Report of findings and recommendations for the second <br /> quarter of 2000 for the above stated property <br /> GROUNDWATER SAMPLING REPORT - SECOND QUARTER 2000 <br /> Sampled 6128100 <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 PHSIEHD permit and oversight Asper the work plan for the removal,soil samples were extracted <br /> and analyzed for BTEX,TPHgas,TPHdiesel,and Oxygenates The analysis indicated the soil under and <br /> near the dispensers was contaminated with both Gasoline and Diesel The soil underneath and <br /> surrounding the three USTs was analyzed as non-detect for all compounds The tank excavation was <br /> backfilled with onsite pea gravel <br /> Over-excavation of the dispenser area was started and suspended on December 10, 1998 with less than <br /> 50% of the planned work completed The excavated area was backfilled with pea-gravel and the <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 />�1 <br /> WATER ANALYSIS OF SAMPLES FROM MONITORING WELLS <br /> On June 28, 2000, Del-Tech Geotechnical Support Services extracted water samples from each <br /> 1 <br />