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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> .._ D <br /> Hnit Supervisors <br /> Donna K.Heran,R.E.H.S. Carl Bergman,R.E.H.S. <br /> Director 31)4 East Weberf�VenUe, Thlid FlOOi Mike Huggins,R.E.H.S.,R.D.I. <br /> AI Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. <br /> KAREN PETRYNA FILE COPY <br /> SHELL OIL PRODUCTS <br /> 20945 S WILMINGTON AVEA <br /> CARSON CA 90810 F&M <br /> RE: Shell-branded Station Site Code:506171 <br /> 2494 E. Fremont St. RO#: 0000251 <br /> Stockton, CA., 95205 CUF#: 016093 <br /> WORK PLAN: "Revised Site Investigation Work Plan". <br /> DATED: August 30, 2004 <br /> PREPARED BY: Cambria Environmental Technology, Inc — Joe Neely, RG <br /> STATUS: APPROVED, (with conditions noted in comments) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S <br /> 2529610 subd(c)(3)1: <br /> • Install two offsite, shallow, monitoring wells (S-7 and S-8), two offsite CPT <br /> deep soil borings (SB-26 and SB-27) and, <br /> • Collect and analyze soil and groundwater samples from all borings for <br /> TPH-g, BTEX, fuel oxygenates (MtBE, TAME, EtBE, DIPE) and lead <br /> scavengers (1,2-DCA, EDB) by EPA Method 8260 and, <br /> • Submit report of findings to SJCEHD. <br /> COMMENTS AND CONDITIONS: <br /> • The report of findings for this phase (August 28, 2003 work plan) is to be <br /> submitted to SJCEHD in the format of an updated Site Conceptual Model <br /> (SCM). Ensure that the cross sections and the iso-concentration maps in <br /> the SCM include soil and groundwater analytical data for TPH-g, <br /> Benzene, MtBE, and 1,2-DCA. The cross sections should have the soil <br /> lithological units drawn across the background with link-up interpretations <br /> for continuity shown. <br />