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' HEAL H)EPARTMENT <br /> TH <br /> ENVIRONMENTAE, <br /> p <br /> )9.- SAN JOAQUIN COUNTY Unit Suervisors <br /> Carl Borgman,R.E.H.S, <br /> Donna K.Reran,R.E.H.S. 304 East Weber Avenue, Third Floor <br /> DirectorMike Huggins,R.E.H.S.,R.D.I. <br /> Stocktori! 'Califomia 95202-2708 <br /> Al Olsen,R.E.H.S. Douglas W.Wilson,R.E.H.S. <br /> Program Manager Tele Bone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> .OW Laurie A.Cutulla,R.E.H.S. Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> WILLIAM BERGVALL <br /> 2977 YGNACIO VALLEY RD <br /> WALNUT CREEK CA 94598 <br /> RE: Former American Forest Products <br /> 2801 West Lane <br /> Stockton,CA <br /> WORKPLAN: Work Plan for 1-2 DCA Investigation DATED: Q4/02/02 <br /> PREPARED BY: URS Co oration <br /> APPROVED X <br /> DISAPPROVED E <br /> ADDENDUM ❑ Submit by: <br /> ADEQUATE AND NECESSARY ELEMENTS OF.THE WORKPLAN (I-I&S 25299-37,subd.(e)(3).): <br /> 1. Advance eight soil borings on-site to define the lateral and vertical extent of 1-2 DCA groundwater <br /> contamination. <br /> 1' Collect depth discrete grab groundwater samples;limiting cross contamination according to standard <br /> operating procedures of CPT hydro-punch technology. D2\1W-2 is screened from 60 to 80 feet below <br /> surface grade.Therefore,in order to define the V�_rtical 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 pathways not set depths of 40 and 55 feet below surface grade. <br /> More than two samples per boring may be needed. <br /> 4. Grab groundwater samples will be analyzed by EPA method 8260B. Report-A 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 concentration over time. <br /> 2. A well permit application is needed-along with the standard$89 fee for wells and soil borings in 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 y <br /> Sam Sa.vig EHS <br /> LOP/Site Mitigation Unit IV <br /> Cc: CVRWQC]3—Marty Hartzell <br /> URS Corporation-Jack Kemp <br /> American Molding and Millwork-Bernic Sloop <br />