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California Reg onal Water Quality C atrol Board <br /> Central Valley Regionj�w r <br /> Robert Schneider,Chair <br /> Winston H. Hickox Gray Davis <br /> Secrerai3-for Sacramento Main Office Governor <br /> Environmental Internet Address: http:/h nvw.swrcb.ca.-ov/rwgcb5 <br /> Protecrion 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 7 January 2002 <br /> ttS :ZI Wd <br /> Mr. Richard Powell <br /> Department of the Navy <br /> 2001 Junipero Serra Boulevard, Suite 600 <br /> Daly City, CA 94014-1976 <br /> DRAFT BACKGROUND GROUNDWATER STUDY, N_AV_AL COMPUTER AND <br /> TELECOMMUNICATIONS STATION(NCTS), SAN DIEGO DETACHMENT STOCKTON, <br /> STOCKTON, CA <br /> We have reviewed the Draft Background Groundwater Study, Naval Computer and Telecommunications <br /> Station, San Diego Detachment Stockton, Stockton, CA reports dated 20 November 2001, as prepared by <br /> Tetra Tech Inc. This reports includes the selection criteria for background wells, and the development <br /> and listing of background data set for inorganic constituents including dissolved metals, anions, and <br /> water quality parameters that can be used during evaluation of Installation Restoration Program (IRP), <br /> and Initial Assessment Study (IAS) sites at NCTS Stockton. <br /> We generally concur with the information presented in this report. Minor comments are provided below: <br /> 1. Section 6.0. Page 37. Second paragraph. The report states, "the chemistry of shallow <br /> groundwater at NCTS Stockton reflects stagnant water of poor quality....". Please expand the <br /> text to further substantiate this statement. Summarize the rationale as to why the water quality is <br /> considered"poor". <br /> 2. Section 6.1. Page 41. Second paragraph, and Page 45. Third paragraph. Replace "Lanthrop" - <br /> with"Lathrop". <br /> 3. Section 6.1. Page 54. Second paragraph. Add"T"before DS to designate TDS. <br /> If you have any questions, please contact me at (916) 255-3078 or TalankS_,rb5s.swrcb.ca.gov <br /> Sudhakar Talanki, P.E. <br /> Associate Water Resources Control Engineer <br /> cc: Mr. Brad Beeman, NCTS, Stockton <br /> Mr. Terry Escarda, Department of Toxic Substances Control <br /> California Environmental Protection Agency <br /> 07 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 littp://www.swrcb.ca.gov/rwgcb5 <br />