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Jimco Truck Plaza - 2 - 19 January 2010 <br /> 1022 East =rontage Road <br /> Ripon, San Joaquin County <br /> Contaminant Level and a Regional Water Quality Control Board - Central Valley Region Water Quality <br /> Goal). The NOI should also state whether or not DW-1 is used for drinking water, and show where <br /> additional :sources of drinking water (domestic wells) are located on site, if applicable. <br /> Recent groundwater monitoring shows your petroleum hydrocarbons groundwater plume is unstable <br /> and moving south onto neighboring Ripon Farm Service (RFS), providing additional need to move your <br /> site into remediation. Also, the RFS nitrate groundwater plume is currently being investigated to <br /> determine whether nitrate impacts to the City of Ripon public supply well, located directly west across <br /> Highway 99 from RFS and your site, are the result of the RFS plume. Since the groundwater flow <br /> direction is primarily to the west at RFS, the NOI contingency plan should include groundwater <br /> extraction as an option, to protect DW-1 and to prevent additional petroleum hydrocarbons migration <br /> offsite onto the RFS property, if caused by the quarterly injections. <br /> Finally, I will be your contact for both the USTs and the AGTs release, with the objective of integrating <br /> the approach for the two releases under one remedial action as the most cost effective means for <br /> reaching water quality goals. If you have any questions, please contact me at (916) 464-4615 or via <br /> e-mail at jbarton@waterboards.ca.gov. <br /> J, <br /> James L.L. Barton, P. G. <br /> f Engineering Geologist <br /> cc: Mr. Robert L'Heureux, SWRCB UST Cleanup Fund, Sacramento <br /> Mr. Nuel Henderson, San Joaquin Co, 600 E. Main St., Stockton 95202 <br /> Mr. Ikon Scheele, Conestoga-Rovers Assoc., 5900 Hollis St., Ste. A, Emeryville, 94608 <br />