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l <br /> •. J <br /> PUBLIC HEALTH 5SIERVICES FaR �a <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DPnSION <br /> Karen Furst, M.D., M.P.H., Health Officer P <br /> 304 East Weber Avenue, Third Floor • Stod xon, CA 95202 <br /> 2091468-3420 ILE COP <br /> PAUL SUPPLE <br /> ARCO STATION #4493 FEB 0 1 i9_99 <br /> P O BOX 6549 <br /> MORAGA CA 94570 <br /> RE: ARCO STATION #4493 SITE CODE. 1042 <br /> 205 N CENTER ST <br /> STOCKTON CA 95202 <br /> San Joaquin County Public Health Services, Envir nmental Health Division (PHSIEHD) <br /> has reviewed the "Work Plan for Site Assessment', dated January 27, 1999, that was <br /> prepared by SECOR International Incorporated for the above referenced site, and has <br /> the following comments for your consideration. <br /> The work pian proposes the advancement of fives it borings, to be converted to <br /> monitoring wells, to evaluate the vertical and latera extent of petroleum hydrocarbons in <br /> soil and groundwater beneath the site. Analytical results from the July 1998 UST pit <br /> observation well sampling event evidenced Methyl Tertiary Butyl Ether(MTBE) at 52.4 <br /> parts per billion (ppb) in ground water from one of t e wells. <br /> PHSIEHD approves the work plan as submitted. Please submit a boring permit <br /> application and required $89.00 fee to PHSIEHD. Please give 48 hours notice to <br /> PHSIEHD prior to scheduling fieldwork. <br /> According to PHSIEHD records, two monitoring wells were installed on site at the time of <br /> the underground storage tank installation in 1984. These wells need to be properly <br /> abandoned, under permit and inspection, prior to tf a removal of the tank system. <br /> If you have any questions or comments please call Lori Duncan at (209) 468-0337. <br /> Donna Heran, REHS <br /> Director, Environmental Health Division <br /> Lori Duncan, REHS MargareH-agorio, RENS <br /> Site Mitigation Unit IV Supervisor, Unit IV <br /> cc: Mark List, CVRWQCB <br /> Rusty Benkowsky, SECOR <br /> A Division of San Joaquin County Balch Care Services <br />