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PETE WILSON,Governor <br /> STATE OF CALIFORNIA-Environmental Protection Agency <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD a CENTRAL VALLEY REGION <br /> 3443 Routler Road,Suite A <br /> Sacramento,CA 95827-3098 <br /> FH N9 6)255-3015 <br /> 9 January 1997 <br /> Ms. Julie Ranting <br /> 133 Peachtree Street,NE (30303) <br /> P.O. Box 105605 <br /> ` Atlanta, GA 30348-5605 <br /> t WORK PLAN FOR INSTALLATION OF ADDITIONAL MONITORING WELLS, <br /> rGEORGIA-PACIFIC CORPORATION, TRACY, SAN JOAQUIN COUNTY <br /> I have reviewed the 4 December 1996 Work Plan for Installation of Additional Ground Water Monitoring <br /> Wells submitted for the former Georgia-Pacific site in Tracy. The work plan is approved under the <br /> following conditions. <br /> Figure 1,Proposed Well Locations <br /> The new wells should be numbered starting with BC-18 rather than BC-15 as shown in Figure I since <br /> there are existing wells numbered BC-15,BC-16,and BC-17. <br /> Sampling <br /> The first ground water samples to be analyzed should be collected at least 48 hours after well development <br /> since contaminants associated with well construction may be present immediately after well development <br /> and the data will be used to evaluate the need for additional investigation and remediation. <br /> It appears from the description of sampling procedures that only soil samples from the capillary fringe will <br /> be submitted for laboratory analyses. If field screening indicates the presence of volatile organic <br /> compounds (VOCs) in soil above the capillary fringe,then such soil samples should be submitted for <br /> laboratory analyses. <br /> In addition to submitting a travel blank and field blank for laboratory analyses, one duplicate ground water <br /> sample for every 10 samples collected should be collected and submitted for laboratory analyses. <br /> Well Construction <br /> The offsite monitoring well should be constructed of four-inch rather than two-inch casing for extraction <br /> purposes, if necessary. <br /> Based on the schedule in the work plan, please submit an investigation report, including recommendations <br /> for future actions, by 26 April 1997. If you have any questions, you may call me at(916) 255-3048. <br /> w' l* L' Ujl'/ <br /> -;y- POLLY LOWRY <br /> Associate Engineering Geologist <br /> PAL:pal/lsb <br /> cc: San Joaquin County Public Health Services, Stockton <br /> Mr. Todd Miller, Brown and Caldwell, Pleasant Hill <br />