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2-83-1999 1 :31PM FROM <br /> P. 2 <br /> PUBLIC HEALTH SERVICES <br /> • SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M,EH., H=Irh Officer <br /> 304 Easr Wcbcr Avcnuc, Third Floor--Srockron, CA 95202- <br /> 209/468-3420 <br /> 5202209/468-3420 :ILE C <br /> PAUL SUPPLE <br /> ARCO STATION #4493 <br /> P O 84S 6549 FEB 01 IG99 <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, Environmental Health Division (PHS/EMD) <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 plan proposes the advancement of five soil borings, to be converted to <br /> monitoring wells, to evaluate the vertical and lateral 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 the wells. <br /> PHS/EHD approves the work plan as submitted. Please submit a boring permit <br /> application and required $89.00 fee to PHS/EHD. Please give 48 hours notice to <br /> PHS/EHD prior to scheduling fieldwork. <br /> According to PHS/EHD 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 the removal of the tank system. <br /> If you have any questions or comments please call Lori Duncan at (209) 468-0337. <br /> Donna Heran, RENS <br /> Director, Environmental Health Division <br /> Lvv+G� ,v„ C.,L <br /> Lori Duncan, RENS Mar are <br /> Site Mitigation Unit IV 9 9 a, REHS <br /> Supervisor, Unit 1V <br /> cc: Mark List, CVRWQCB <br /> Rusty-Benkowsky, SECOR <br />