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r) <br /> ENVIRONMENTAL HEALTH bEPARTMENT <br /> PauU'" SAN JOAQ IUIN COUNTY <br /> o #, -W•- � Unit Supervisors <br /> 2.; �'?•" •2 Donna K.Heran,R.E.H.S. Carl Borgman,R.E.H.S. <br /> K <br /> 304 East Weber Avenue, Third Floor <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, CallOrnla 95202-270$ Douglas W.Wilson,R.E.H.S. <br /> • '` c <br /> Program Manager Telephone: 209 468-3420 Margaret Lagorio,R.E.H.S. <br /> e . g p <br /> a�ir0 Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Program Manager Fax: (209) 464-x138 Mark Barcellos,R.E.H.S. <br /> SAIYED S ALI JAN 2 4 2003 <br /> CAL-TRANS DISTRICT 10 <br /> 1976 W.CHARTER WAY <br /> STOCKTON CA 95205 <br /> RE: Tracy Maintenance Station <br /> 2005 Krohn Rd. <br /> Tracy, CA. 95376 <br /> WORK PLAN: "Leachfield Site Investigation" DATED: January 14, 2003 <br /> PREPARED BY: Martha Adams, Shaw Environmental <br /> STATUS: APPROVED (with conditions listed below). <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN: <br /> • Install 6 soil borings to 10' bgs and collect soil samples at 5' and 10' and <br /> analyze for constituents listed in paragraph 4.6 of work plan and, <br /> • Trench across area to +-4' bgs to determine if septic leach lines still <br /> present, backfill with same excavated soil whether lines found or not and, <br /> • Prepare and submit a report of findings to EHD. <br /> COMMENTS AND CONDITIONS: <br /> • -Actual oxygenate analysis did not incl de specific constituents. EPA <br /> Method 82606 analyses must include, MtBE, TAME, TBA, DIPS, ETRE, <br /> EDB, and 1,2-DCA and, <br /> • Detectable amounts of contamination in 10' bgs soil sample will require <br /> additional vertical and lateral investigation and a groundwater <br /> investigation for those constituents arid, <br /> • If leach lines are found during trenching operations, a 'sludge' sample is to <br /> be collected and analyzed for ALL work plan constituents as well as TCLP <br /> EPA Method, as per EPA protocol 1311 and, <br /> • Unknown chemicals are stored on this site in locked bunkers, not <br /> inspected by EHD. In order to verify if wash down practices may have <br /> caused these chemicals to be introduIced into the septic system, ALL <br /> chromatograms for ALL laboratory analyses are to be included in the <br /> report submitted to EHD. Anomalies noted may require additional EPA <br /> Methodology and testing to identify the anomalies. <br />