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California Ronal Water Quality (ntrol Board <br /> vCentral Valley Region <br /> Robert Schneider,Chair <br /> Winston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office D Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/mgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 SEP 13 2002 <br /> 12 September 2002 ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> Ms. Julie Raining <br /> Environmental Affairs <br /> Georgia-Pacific Corporation <br /> P.O. Box 105605 <br /> Atlanta, GA. 30348 <br /> WORKPLAN FOR ADDITIONAL INVESTIGATION, FORMER GEORGIA-PACIFIC <br /> CORPORA TON TRACY CHEMICAL PACKAGING PLANT, 75 WEST VALPICO ROAD, TRACY, <br /> CALIFORNL4. <br /> We have reviewed the 22 August 2002 Workplan for Additional Investigation, Former Georgia-Pacific <br /> Corporation Tracy Chemical Packaging Plant, 75 West Valpico Road, Tracy, California(Workplan). <br /> The purpose of the Workplan is to describe the work proposed to assess the distribution of chloroform in <br /> soil and groundwater and identify any additional source areas. <br /> Soil and groundwater will be sampled from two borings advanced in the gravel area located north of the <br /> manufacturing building. Borings will be backfilled when sampling is completed. Historic records <br /> identify the area as a potential source area, once used as an evaporation/percolation pond for storm runoff. <br /> Soil and groundwater samples will be analyzed for VOCs utilizing United States Environmental <br /> Protection Agency (EPA) Method 8010. Our comments on the Workplan are presented below. <br /> General Comments <br /> 1. Due to the potential for substantial variability of contaminant concentrations in soil, discrete-depth <br /> soil gas sampling instead of soil sampling should be conducted in the gravel area. Submit soil gas <br /> samples for laboratory analysis using EPA Method 8260. <br /> 2. Based on the site use history, groundwater samples should be submitted for laboratory analysis for <br /> the presence of volatile organic compounds by EPA Method 8260 and Title 26 Metals by EPA <br /> Methods 6010/7000 series. <br /> By 14 October 2002, submit a revised Workplan or an Addendum that addresses our comments. If you <br /> have any questions m reach me at(916) 255-3411 or at to ly orb(a)rb5s.swrcb.ca.¢ov. <br /> aylor <br /> Associate En neering Geologist <br /> cc list on next page <br /> California Environmental Protection Agency <br /> Co Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.c&gov/mgcb5 <br />