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trol Board <br /> California Re�onal Water QualityAn <br /> ::, <br /> Central Valley Region : M` , <br /> Robert Schneider,Chair <br /> Winston H.Hickox Gray Davis <br /> Secretary for Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/rwgcb5 <br /> Protection % 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 30 May 2001 <br /> Richard Powell <br /> Naval Facilities Engineering Command, West <br /> Environmental Compliance, Mail Code 6423 <br /> 900 Commodore Drive <br /> San Bruno, CA 94066-2402 <br /> DRAFT TECHNICAL MEMORANDUM, WELL AND DATA SELECTION, BACKGROUND <br /> GROUNDWATER STUDY, NAVAL COMPUTER AND TELECOMMUNICATIONS STATION, <br /> SAN DIEGO DETACHMENT,STOCKTON <br /> We have reviewed, and generally concur with, the Draft Technical Memorandum, Well and Data <br /> Selection, Background Groundwater Study, (Report) dated 21 May 2001. The Report is essentially a <br /> work plan that presents the well and data selection criteria to be used in preparing the background <br /> groundwater study report. The background groundwater study report is to be prepared using existing <br /> data, which should be both scientifically defensible and save the Navy money. The Report includes a <br /> discussion of the wells and chemical analyses, to be used in the background study. The Report also <br /> briefly discusses statistical methods that may be used in the analysis of the existing data. <br /> Since we have been involved in the background studies, for both soil and groundwater, at numerous <br /> facilities throughout the Central Valley,we encourage the Navy to contact us should any questions arise <br /> during the data analysis and preparation of the background groundwater study report. We also strongly <br /> concur with the Report that the analysis of the data set should evaluate both overall groundwater <br /> background concentrations across the base, and also identify and evaluate any localized areas where the <br /> background groundwater quality appears to be different from the base as a whole. As the Report <br /> indicates, localized fluctuations in background water duality sometimes are ofgreat importance in <br /> making site-specific decisions. Please contact me at (916) 255-3066 if you have any questions regarding <br /> this matter. <br /> �MtRUSSELL <br /> Senior Engineering Geologist <br /> cc: San Joaquin County Environmental Health Department <br /> Brad Beeman NCTS, Stockton <br /> Terry Escarda,Region 1, DTSC <br /> Jay Jahangiri, Port of Stockton <br /> Walter Kim, Tetra Tech EM, Inc, 10670 White Rock Road, <br /> Suite 100, Rancho Cordova, CA 95670 JSR:NCTS Draft GW Background <br /> California Environmental Protection Agency <br /> �a 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.swreb.ca.gov/rwgcb5 <br />