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California Regional Water Quality Control Board <br /> Central Valley Region <br /> il�; Katherine Hart,Chair 0 <br /> Linda S.AdamsArnold <br /> Secreta for 11020 Sun Center Drive#200, Rancho Cordova,California 95670-6114 Schwarzenegger <br /> Secretary Phone(916)464-3291 -FAX(916)464-4645 <br /> Environmental http://www.waterboards.ca.gov/centralvalley Governor <br /> Protection <br /> 10 August 2010 <br /> NO Cr E 1 2 'UIU <br /> Sergio Morescalchi <br /> Environmental Business Manager ENVIRONMENT HEALTH <br /> Atlantic Richfield Company PERMIT/SERVICES <br /> P.O. Box 1257 <br /> San Ramon, CA 94583 <br /> FINAL REVISED MONITORING AND REPORTING PROGRAM NO. R5-2010-0818, <br /> APPLIED AEROSPACE STRUCTURES CORPORATION, 3437 SOUTH AIRPORT WAY, <br /> STOCKTON, SAN JOAQUIN COUNTY <br /> BP America is monitoring groundwater at thepp lied Aerospace Structures facility under <br /> Monitoring and Reporting Program (MRP) No. R5-2003-0703 due to a release of Volatile <br /> Organic Compounds (VOCs). In your letter of 25 November 2009 you requested changes to <br /> the MRP. Staff of the Central Valley Regional Water Quality Control Board (Regional Water <br /> Board) revised the MRP to eliminate the quarterly monitoring schedule that was required for <br /> several of the monitoring wells. <br /> In your letter, you requested semi-annual monitoring for all active wells except MW-7, MW-13 <br /> and MW-14, which would be sampled annually. After review of the groundwater data history <br /> and trends, Regional Board staff place several additional wells on the annual monitoring <br /> schedule. The revised MRP requires semi-annual monitoring for MW-6, MW-15, MW-16 and <br /> MW-17. All other wells will be monitored on an annual basis. <br /> Revised MRP No. R5-2010-0818 is now in effect. The next required sampling event should <br /> take place in the third quarter of 2010, and an annual report is due 1 November 2010. A copy <br /> of the new MRP is included for your records. If you have questions about this letter, you may <br /> con t Gerald Djuth at (916) 464-4677 or by email at gdjuth@waterboards.ca.gov. <br /> DUNCAN A. AUSTIN, P.E. <br /> Chief, Site Cleanup Unit <br /> Attachment <br /> cc: Ms. Adrienne Ellsaesser, San Joaquin County Environmental Health Dept., Stockton <br /> Mr. Fred Kintzer, Parsons, Walnut Creek <br /> California Environmental Protection Agency <br /> C11 Recycled Paper <br />