California Regional Water Quality Control BoardSan Francisco Bay Region

Winston H. Hiekoz Intemel Address: http://www.swrcb.ca.govSecreraryfor 1515 Clay Street, Suite 1400, Oakland, California 94612Environmenra/ Phone (510) 622-2300 • FAX (510) 622-2460Prorecrion

Date:File No: 2189.8009(JCH)Mr. Arturo R. Tamayo, R.E.M

Remedial Project ManagerMoffett Federal AirfieldBRAG Operations, Code 06CH.ATSWNAVFACENGCOM1230 Columbia Street, Suite 1100San Diego, CA 92101Gray DavisGovernor

Subject: Transmittal of Closure Letter and Site Summary for Underground Storage Tank57, Moffett Federal Airfield, Moffett Field, California (RWQCB Case No. 43D9012)Dear Mr. Tamayo:Attached please find the uniform underground storage tank (UST) closure letter and the site closuresummary forms for the above referenced UST. This letter documents that, based on availableinformation, no further action (NFA) related to the above mentioned underground storage tank releases isrequired following currently adopted site specific petroleum clean up criteria for soil and groundwater.This NFA status applies only to releases of petroleum from fuel UST at the above referenced site. Forthose sites where groundwater is polluted by non-petroleum related chemicals or where other sources ofpetroleum pollution exist (e.g., fuel lines, spills, and above ground tanks), this determination is applicableonly to soil and groundwater impacts associated with petroleum UST releases. The closure criteriaapplied in this assessment can be found in the Moffett Federal Airfield Final Basewide Petroleum SiteEvaluation Methodology Technical Memorandum, dated October 2, 1998, published by Tetra Tech EMInc. The Regional Water Quality Control Board shall be notified of any changes in future land use.Please contact Judy C. Huang of my staff at (510) 622-2363 or email jch@rb2.swrcb.ca.gov if you haveany questions regarding this matter.Sincerely,

-Loretta K. BarsamianExecutive OfficerEnclosures:-1- Case Closure Letter-2- Site Summary FormCC:California Environmental Protection Agency~~ RecycIedPaper_2_Ms. Adriana Constantinescu, SF BAY RWQCBMs. Alana LeeU. S. Environmental Protection AgencyRegion IX75 Hawthorne Street (FSD-7-3)San Francisco, CA 94105Mr. Donald M. ChuckM/S 218-1Environmental Services OfficeNational Aeronautics and Space AdministrationAmes Research CenterMoffett Field, CA 94035-1000

Dr. James G. McClureMoffett Field RAB, THE committee4957 Northdale DriveFremont, CA 94536Mr. Tom MohrSanta Clara Valley Water District5750 Almaden ExpresswaySan Jose, CA 9S 118Mr. Kevin S. WoodhouseEnvironmental Management CoordinatorCity of Mountain ViewP.O. Box 7540Mountain View, CA 94039-7540Mr. Peter Strauss317 Rutledge St.San Francisco, CA 94110Mr. Bob MossRAB Community Co-Chair4010 OrmePalo Alto, CA 94306Mr. Lenny SiegelCenter for Public Environmental Oversight269 Loreto StreetMountain View, CA 94041

California Environmental Protection Agencyea RecycleAPnper-3-Mr. Stewart McGeeDepartment of Public Safety, Fire and Special Operations700 All America WaySunnyvale, CA 940883707Cris TullochSanta Clara Valley Water District5750 Almaden ExpySan Jose, CA 95118California Environmental Protection Agency~a RecycledPnper.~ California Regional Water Quality Control Board

San Francisco Bay RegionWinston H. Hickox Internet Address: http://www.swrcb.ca.govSecretnry for 1515 Clay Street, Suite 1400, Oakland, California 94612Environrrtentn( phone (510) 622-2300 er FAX (510) 622-2460ProrecrionDate:File No: 2189.8009(JCH)Mr. Arturo R. Tamayo, R.E.MRemedial Project ManagerMoffett Federal AirfieldBRAG Operations, Code 06Ch.ATSWNAVFACENGCOM1230 Columbia Street, Suite 1100San Diego, CA 92101

Subject: Closure Letter for Underground Storage Tank 57, Moffett Federal Airfield,Moffett Field, California (RWQCB Case No. 43D9012)This letter confirms the completion of site investigation and remedial action for the undergroundstorage tank formerly located at the above-mentioned location. Thank you for your cooperationthroughout this investigation. Your willingness and promptness in responding to our inquiriesconcerning the former underground storage tank are greatly appreciated.Based on the information in the above-referenced file and with the provision that the informationprovided to this agency was accurate and representative of site conditions, no further actionrelated to the underground tank release is required.This notice is issued pursuant to a regulation contained in Section 2721(e) of

Title 23 of theCalifornia Code of Regulations.Please contact Judy C. Huang of my staff at (510) 622-2363 or jch@rb2.swrcb.ca.gov if you haveany questions regarding this matter.Sincerely,

~Loretta K. BarsamianExecutive OfficerEnclosure: Site Closure SummaryGray DavisGovernorThe energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption.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.

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