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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Donna K.Heran,R.E.H.S. Unit Supervisors <br /> Carl Borgman,R.E.H.S. <br /> 304 East Weber Avenue Third Floor <br /> Director Mike Huggins,R.E.H.S.,RD.I. <br /> •4, Al Olsen,R.E.H.S. Stockton, California 95202-2708 <br /> ? Douglas W.Wilson,R.E.H.S. <br /> Manager <br /> Program Prog g <br /> 4� FORN <br /> Laurie A.Cotnlla,R.E.H.S. Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> ELLIS CECCHINI <br /> CECCHINI CECCHINI & GIOVANNONI <br /> 3000 E EIGHTEENTH ST <br /> ANTIOCH CA 94509FEAX <br /> D <br /> RE: DELTA/CHEROKEE TRUCK(former) SITE CODE: 1800 <br /> 3535 E.Cherokee Road RO#000118 <br /> Stockton,CA. 95205 <br /> WORK PLAN: "Monitoring Well Installation and Remediation Feasibility Testing" <br /> DATED: February 12,2002 <br /> PREPARED BY: Paul Dotson, Staff Geologist—Advanced Geo-Envirn Consulting <br /> STATUS: APPROVED <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25299 37, <br /> subd© 3 : <br /> • Overbore/destruction of existing,improperly screened monitoring well <br /> "UST-1" and, <br /> • Replace "UST-1"with new, dual-casing, `clustered' monitoring wells with <br /> depths of 65' and 90' bgs and, <br /> • Collect and analyzed selected soil and groundwater samples for TPHg, <br /> BTEX,1,2-DCA, EDB, MtBE and Oxygenates, total organic content,pH, <br /> intrinsic permeability,porosity, and, <br /> • Install one, 4" PVC, groundwater extraction well to 75'bgs and conduct 8- <br /> hour,step, draw down test and a 48-hour constant rate test, collect and <br /> characterize purge water for disposal and, <br /> • Install four (4) soil vapor extraction wells to 25' bgs, conduct an 8-hour soil <br /> vapor extraction feasibility test, collect and analyze.vapor samples and, <br /> • Install three pilot borings for installation of six (6) sparge points,conduct an <br /> Ozone sparge pilot test for six (6) months with groundwater sampling every <br /> month and, <br /> • Generate and submit to EHD a report of findings and Feasibility Study <br /> Report. <br /> FILE COPY <br />