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CaliforniCegional Water Quality C*ol Board <br /> Central Valley Region ro <br /> v Robert Schneider,Chair <br /> Arnold <br /> Linda S.Adams Sacramento Main Office <br /> Secretaryfor Schw over neggcr <br /> Environmental 1 020 Sun Center Drive k464 Rancho Cordova,California 9567 6114 Governor <br /> nECIE� �I6)waterb91 •FAX(916)464-4645 <br /> Protection RECIE�wmwwaterbouds.ca.gov/centralvalley <br /> 31 August 2006 SEP - 1 20016 <br /> ENVIRONMENT HEALTH <br /> PERP/IIT/SERVICES <br /> Nestle USA Inc. <br /> Attention: Mr. Mike Desso <br /> 800 North Brand Boulevard <br /> Glendale, California 91203 <br /> RIPON PUBLIC SCHOOL WATER SUPPLY WELL, FORMER NESTLE USA, INC. FACILITY, <br /> RIPON, SAN JOAQUIN COUNTY <br /> California Regional Water Quality Control Board, Central Valley Region (Regional Water Board) <br /> staff has reviewed the quarterly chemical analyses results on a water sample collected for Nestle <br /> USA Inc. (Nestle) from a water supply well for the Ripon public school located at 304 North <br /> Acacia Avenue, Ripon, California. <br /> The laboratory analyses for volatile organic compounds in the water sample collected from the <br /> school's drinking water supply well (RPS-1) on July 20, 2006, detected trichloroethene (TCE) at a <br /> concentration of 0.20 micrograms per liter (µg/Q. Also, the laboratory analysis detected cis-1,2- <br /> dichloroethene (cis-1,2-DCE) at a concentration of 0.34 µg/L. <br /> Although concentrations are below public health goals and maximum contaminant levels, the <br /> detections may indicate the arrival in the intermediate aquifer zone of the volatile organic <br /> compound plume emanating from the former Nestle facility at Industrial Avenue. As you know, <br /> TCE and cis-1,2-DCE are constituents of concern in the plume. Currently, Nestle samples RPS- <br /> 1 quarterly. Nestle should begin sampling the well on a monthly basis and providing monthly <br /> reports as soon as the laboratory results are available. <br /> If you have any questions, please contact me at (916) 464-4675, or by email at <br /> jbrownell@waterboard s.ca <br /> James R. Brownell, P.G. <br /> Engineering Geologist <br /> cc's <br /> Salli Anne Newhart, Ripon Unified School District <br /> Bill Finley, Superintendent, Ripon Christian School <br /> Margaret Lagorio, San Joaquin County Environmental Health Department <br /> Matt Machado, City of Ripon <br /> Joseph Spano, Department of Health Services, Drinking Water Division, Stockton <br /> Noelia Marti-Collin, Nestle USA <br /> Binayak Archarya, Environmental Cost Management <br /> California Environmental Protection Agency <br /> p o Recycled Paper <br />