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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Donna K.Heran,RE.H.S. Unit Supervisors <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> AI Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> Manager M <br /> Program Douglas W.Wilson,R.E.H.S. <br /> q<;FORN g g <br /> Laurie A.Co[ulla,R.E.H.S. Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> - <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> EDWARD RALSTON <br /> TOSCO MARKETING COMPANY <br /> 1380 LEAD HILL RD STE 120 RM <br /> ROSEVILLE CA 95661 <br /> RE: TOSCO-Service Station #1205 SITE CODE: 507198 <br /> 16470 Cambridge St. RO#:0000138 <br /> Lathrop, CA., 95330 <br /> WORK PLAN: "Additional Off-Site Assessment' <br /> DATED: February 27, 2002. <br /> PREPARED BY: Secor— Rusty Benkoskv P.E. <br /> STATUS: APPROVED (with conditions noted below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S <br /> 25299.37, subd(c)(3)l: <br /> • Install five to ten (5-10) offsite Geoprobes to north, east, and west in two <br /> phases to determine lateral extent of groundwater petroleum plume and, <br /> • Install three to five (3-5) shallow groundwater monitoring wells offsite in <br /> areas of concern as determined by Geoprobe phase and, <br /> • Analyze selected soil and all groundwater samples for TPH as gasoline, <br /> BTEX, 1,2-DCA, EDB, MtBE and the Oxygenates on five-day turn-around <br /> time and submit report of findings to EHD. <br /> COMMENTS AND CONDITIONS: <br /> • Analyze a representative groundwater sample for Total Lead by EPA <br /> 6010 and Methanol by EPA 8015m and, <br /> • Report of findings due at EHD within ninety (90) days of last phase <br /> (monitoring well installation), <br /> • Submit copies of City of Lathrop encroachment permits and EHD well <br /> installation permit applications and fees before April 12, 2002. <br /> REASONS FOR DISAPPROVAL OF THE WORK PLAN [H&S 25299 37 <br /> subd(c)(3)1: <br /> • None <br /> DATED: March 7, 2002. BY: � <br /> Michael Infurna, nior R S (209) 468-3454 <br /> [ X ] Faxed to consultant on: 3 OZ <br /> FILE COPY <br />