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California Regional Water Quality Control 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.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 /> 14 February 2001 2 .n �✓ <br /> G � <br /> Alfonso T. Jesena, Jr. ��2 <br /> Navy Environmental Facility Activity-West <br /> Code 6424 ZJ <br /> 900 Commodore Drive <br /> San Bruno, CA 94066-2402 �,r <br /> DRAFT FINAL FIELD INVESTIGATION WORK PLAN FOR UNDERGROUND STORAGE <br /> TANK(UST)SITES AT BUILDING 517, PARCEL 92, NAVAL COMPUTER AND <br /> TELECOMMUNICATIONS STATION(NCTS), SAN DIEGO DETACHMENT, STOCKTON <br /> We have reviewed the subject document, dated 30 November 2000, as prepared by AGS, Inc. The USTs <br /> located at Building 517 consisted of two 4,000-gallon single-wall steel tanks which were excavated and <br /> removed in March 1990. Subsequent investigations occurred upon excavation and in 1995 to further <br /> characterize the extent of contamination of petroleum hydrocarbons and evaluate remediation <br /> alternatives. The investigation consisted of the installation and sampling of three monitoring wells. A <br /> two-phased approach for the fieldwork is planned for this investigation. The first phase of the field <br /> investigation will consist of delineating the extent of groundwater contamination using the <br /> geoprobe/direct push method and soil analysis, as well. The second phase will consist of installation and <br /> sampling of three additional groundwater monitoring wells to be installed in the shallow water bearing <br /> zone (SWBZ). <br /> We concur with the data quality objectives of the Work Plan and the locations of the proposed geoprobe <br /> borings. We reserve the right to participate in the final locations of the monitoring wells once the results <br /> of Phase 1 are completed and the data analyzed. Further investigation of the deeper aquifers may be <br /> deemed necessary based upon the results of groundwater monitoring overtime. <br /> Please contact me 72 hours prior to field activities so I may plan to observe sampling and/or well <br /> installation. If you have any questions please contact me at (916) 255-3078 or <br /> schwabk ,rb5s.swrcb.ca.gov. <br /> A. SCHWAB <br /> Associate Engineering Geologist <br /> cc: Richard Powell, EFA, West, San Bruno <br /> Brad Beeman, NCTS, Stockton <br /> Gail Qatsha,NCTS, Stockton <br /> San Joaquin County Environmental Health Department, Stockton <br /> Randall Young, AGS, Inc., 111 New Montgomery Street, Suite 500, San Francisco, CA 94105 <br /> Kas:NCTS DftFinal UST 517 <br /> California Environmental Protection Agency <br /> ca 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.ca.gov/rwgcb5 <br />