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Upy <br /> r� FILE <br /> H ALTH SERI tSPUBLIC <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> LI r.0 <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> BRIDGESTONE/FIRESTONE AUG <br /> ENVIRONMENTAL DEPT <br /> 2550 W GOLF RD <br /> ROLLINGS MEADOWS IL 60008 <br /> RE: BRIDGESTONE/FIRESTONE SITE CODE: 5066606 <br /> 400 N EL DORADO ST <br /> STOCKTON CA 95202 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) is the lead <br /> agency providing the oversight of the investigation and cleanup of releases from underground storage <br /> tanks (USTs)within San Joaquin County. PHS/EHD has a contract with the California State Water <br /> Resources Control Board to conduct a UST corrective action program. The above referenced site was <br /> placed in the PHSIEHD Local Oversight Program (LOP) in December 1997. <br /> San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) has reviewed the <br /> report prepared by QST Environmental dated February 19, 1999 and the addendum to the report dated <br /> June 23, 1999. The report contains soil and groundwater results from the assessment performed in the <br /> area of three underground storage tanks (USTs) closed in place in 1967. The addendum contains other <br /> identified leaky UST sites and their locations in relationship to the above referenced site. <br /> On December 21, 1998, two soil borings, BFS-1 and BSF-2, were drilled to a depth of 28 and 20 feet <br /> below ground surface (bgs), respectively, and soil and groundwater samples were collected for analyses. <br /> A silty sand was encountered from 25-28 feet bgs in BFS-1 and from 16-20 feet bgs in BFS-2. Soil <br /> samples were collected at 14 and 20 feet bgs in BFS-1 and 16 and 19 feet bgs in BFS-2. Groundwater <br /> was encountered and samples were collected during drilling at 28 feet bgs.in BFS-1 and 20 feet bgs in <br /> BFS-2. <br /> Analytical results of the soil samples from the borings were below detection limits for Total Petroleum <br /> t Hydrocarbons as gasoline (TPH-gasoline), Benzene, Toluene, Ethlybenzene, Xylene, and oxygenates. <br />,. Groundwater sample results from BFS-1 were positive for: TPH-gasoline 4200 parts per billion (ppb), <br /> Benzene 220 ppb, Toluene 400 ppb, Ethylbenzene 340 ppb, Xylene 1500 ppb, MTBE 0.78 ppb, DIPE 6.1 <br /> ppb, and Ethanol 6.4 ppb. <br /> A"Property Transfer Site Assessment"was conducted on April 18, 1997 and soil samples were collected <br /> in the area of the three USTs closed in place. Soil sample analytical results at 20 feet bgs were positive <br /> for gasoline. TPN-gasoline was as high as 16,200 part per million (ppm) in sample PB1. <br /> Due to the high concentrations of gasoline contamination in soil and groundwater evidenced in the area of <br /> the 3 USTs closed in place, you were directed to perform a groundwater investigation to determine the <br /> nature and extent of contamination from the documented unauthorized release. <br /> Orion Environmental Inc. installed 3 monitoring wells and sampled them for two quarters.The results <br /> were presented in a report dated July 7;2000, which has been recently reviewed by PHS/EHD. <br /> A Division of San Joaquin County Health Care Services <br /> r ' <br />