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California Retional Water Quality bi ntrol Board <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Winston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.sweb.ca.gov/ rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3164 <br /> 31 August 2001 60 T Wd h d3S 10, <br /> Mr. Mike Lecision <br /> Diamond Walnut Growers hic. <br /> 1050 South Diamond Street <br /> Stockton, California-95201 <br /> REVIEW OF WORK PLAN,DIAMOND WALNUT GROWERS, STOCKTON PLANT, <br /> SAN JOAQUIN COUNTY <br /> We have reviewed the 27 July 2001 Workplan for Additional Subsurface Investigation (WP) <br /> submitted by ATC Associates Inc. (ATC), on behalf of Diamond Walnut Growers Inc. (DWG) <br /> for its Stockton Plant. We discussed many of the elements of this WP during a site tour on <br /> 28 August 2001, which Ms. Jeanne Homsey of ATC also attended. <br /> During our meeting, you agreed to submit a work plan addendum by 1 October 2001. The <br /> addendum will include the following: <br /> • Adding a boring along East North Street,north of the cogeneration facility. <br /> • Selecting a field soil screening method appropriate for hexavalent chromium. <br /> • Modifying the number and depth of soil samples collected from the borings to consider <br /> potential and known source areas based on previous sampling. <br /> • Selecting a groundwater analytes list that includes compounds necessary to develop a <br /> groundwater treatment alternative for hexavalent chromium. <br /> We anticipate the field work will be completed in December. Please include in the addendum a <br /> schedule through the submittal of a characterization report. <br /> If you have any questions, you may contact me at(916) 255-3082. <br /> 7E2 <br /> MAR Y <br /> Private Sites Cleanup Unit <br /> cc: Ms. Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton <br /> Ms. Jeanne Hornsey, ATC Associates, Modesto <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. For a list of <br /> simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca,gov/mgcb5 <br />