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JI <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY Unit Supervisors <br /> Carl Borgm an,R.E.H.S. <br /> Donna K.Heran,R.E.H.S. <br /> -_.�04 East Weber Avenue, Third Floor Mike Ruggihs,R.E.H.S.,R.D.I. <br /> Director <br /> Al 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 /> Robert M6 Cie <br /> ..... Ilon,R.E.H.S. <br /> P Laurie A.Cotulla,R.E.H.S. Fax: (209)464-0138 mark Bar'cellos,R.E.H.S. <br /> Program Manager <br /> JERRY SULLIVAN <br /> KOHLBERG KRAVIS & ROBERTS <br /> 3478 BUSKIRK AVE <br /> PLEASENTON CA 94523 <br /> RE: Former American Forest Products <br /> 2801 West Lane <br /> Stockton,CA <br /> WORKPLAN: Work Plan for 1-2 DCA jgycatjation DATED: 04/02102 <br /> PREPARED BY: RS Co[poration <br /> U <br /> "PROVED X <br /> DISAPPROVED 0 - <br /> ADDENDUM Subniit by <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE XVORKPLAN ( &S 25299.37,subd.(c)(3).). <br /> 1 Advance eight soil borings on:site to define the lateral and vertical extent of 1-2 DCA groundwater.. <br /> contamination. <br /> 2. Collect depth discrete grab groundwater samples,limiting cross contamination according to standard <br /> operating procedures of CPT hydro-punch technology. DI\RV-2 is screened from 60 to 80 feet below <br /> surface grade.Therefore,in order to define the vertical extent of groundwater contamination,a.discrete <br /> sample must be taken in a permeable zone below 80 feet. <br /> 3. Sample depths will be based on preferential pa..thways not set depths of 40 and 55 feet below surface grade. <br /> i <br /> More than two samples per boring maybe needed. <br /> 4. Grab groundwater samples will be analyzed by EPA method 8260B. Report all peaks shown by this <br /> analysis. <br /> COMMENTS AND CONDITIONS: <br /> 1. The statement on the cover page of the above-referenced report that once the 1-2 DCA plume is defined, <br /> closure will be granted,is false. The responsible party-may need monitoring wells to show the 1-2 DCA <br /> plume is stable and decreasing in concentratio�,A over time. <br /> 2. A well permit application is needed along with;the standard$89 fee for wells and soil borings 4n San <br /> Joaquin County. One application and fee per parcel per contractor. <br /> 3. Notify PHS/EHD at least 48 hours prior to the proposed scheduled work dates. <br /> DATED BY <br /> ;IS,,m Savigg EH <br /> LOP/Site Mitigation Unit IV <br /> Cc: CVRWQCB—Marty Hartzell <br /> URS Corporation-Jack Kemp <br /> American Molding and Millwork-Bernie Sloop <br />