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ENVIRONMENTAL HEALTH DEPARTMENT <br /> j Paa,N SAN JOAQUIN COUNTY <br /> a <br /> I c` iF Donna K.Heran,R.E.H.S. Unit Supervisors <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> At Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> •c -°v • <br /> Program Manager - Douglas W.Wilson,R.E.H.S. <br /> '°4FORN` 8 8 Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.og Man Co R.E.H.S. <br /> Program ManFax: (209) 464-0138 Robert McClellan,R.E.H.S. <br /> Manager Mark Barcellos,R.E.H.S. <br /> JERRY SULLIVAN' <br /> KOHLBERG KRAVIS & ROBERTS <br /> 3478 BUSKIRK AVE <br /> PLEASANTON CA 94523 4 <br /> I <br /> RE: Former American Forest Products <br /> 2801 West Lane ,1 <br /> WORKPLAN: Work Plan for 1-2 DCA Investigation DATED: 04/02/02 _ <br /> PREPARED BY: URS Corporation �e <br /> APPROVED X <br /> DISAPPROVED ❑ <br /> ADDENDUM ❑ Submit by : <br /> q <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE-WORKPLAN (H&S 25299.37,subd.(c)(3).): <br /> 1 <br /> Advance eight soil boringson site to define the lateral and vertical extent of 122 DCA groundwater <br /> 0 <br /> contamination... ` - <br /> 2 Collect'depib,di'screte grab groundwater:satnples, hriuting cross contamination according to standard <br /> operating procedures of CPT hydro punch technology:,DbIW-2 is'scieened from 60 to 80 feet below <br /> surface.gtade..Therefore,inorder to define�the'verucaPextent.of groundwater contamination,.a discrete <br /> �saitiple 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 all peaks shown by.this <br /> analysis. - - <br /> COMMENTS AND CONDITIONS ' <br /> 1 The statement on the cover page of theabbotve referenced.report that once the 1-2 DCA plume is defined, <br /> m..w ._._� _ ,,,.. <br /> -. <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. d.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 /> c <br /> DATED <br /> —'1 � Z BY <br /> Sam Savig,EH ' <br /> ,LOP/Site.Mrt)gahonUnitIV.., _>>• r.. -�..:, <br /> Cc ,,,„CYRWQCB—Marty Hartzell <br /> ,:yURS Corporation, .Jack Kemp <br /> American Molding and Millwork-Bernie Sloop <br />