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� r _ <br /> -HERLAM GRAD TRC-- 13T2 :1 1 ENVIRON!'.11EN1 HEALTH <br /> A t t o r n e y s A t L a w PERMIT/SERVICES <br /> Stacy L.Guthmiller <br /> sguthmiller@herumerabtree.com <br /> May 7, 2007 <br /> VIA FACSIMILE & MAIL <br /> Ms. Amy Terrell <br /> Regional Water Quality Control Board - Central Valley Region <br /> 11020 Sun Center Drive, Suite 200 <br /> Rancho Cordova, California 95670-6114 <br /> Facsimile: (916) 464-4797 <br /> Re: City of Ripon/Ripon Farm Service Contamination <br /> Dear Ms. Terrell: <br /> As you may recall, on December 12, 2006, on behalf of the City of Ripon ("City"), I <br /> wrote you concerning the Work Plan for Monitoring Installation dated August 21, 2006 <br /> prepared by Genesis Engineering & Redevelopment ("Work Plan") for Ripon Farm Services, <br /> Inc. ("RFS"). Although your letter to RFS regarding the Work Plan, dated December 14, <br /> 2006, did not address many of the concerns raised by the City, you confirmed that those <br /> issues were to be addressed in a future work plan. <br /> The City has received the evaluation of the Summary of Groundwater Sampling <br /> Data ("Summary") dated April 26, 2007 prepared by Genesis Engineering & Redevelopment <br /> LLC for RFS. This letter presents the City's evaluation of the Summary and the discussion <br /> at the meeting between RFS and the Regional Water Quality Control Board ("RWQCB") <br /> last week. The City appreciates the opportunity to comment on the recent activities <br /> undertaken by RFS. <br /> The City's concerns about the Summary are as follows: <br /> 1. While the April 1, 2007 nitrate concentration data from RFS' off-site well <br /> RMW-3S might be indicative of another source of nitrate in the site vicinity, <br /> it does not eliminate the very real possibility that RFS is also a source. <br /> 2. Extremely high concentrations have recently been detected on the RFS site in <br /> the immediate vicinity of the Batch Mixer. MW-103 contained 2,342 ppm <br /> nitrate (as NOs) on $116106. B-102 contained 4,000 ppm nitrate, which <br /> essentially matched the concentrations 4,100 ppm observed in the nearby <br /> upper sump, and was in a similar range as the 1,700 ppm observed in the <br /> lower sump (all samples collected on October 4, 2006). These data are likely <br /> indicative of impact from spills related to RFS operations. This <br /> interpretation is consistent with a statement made in a 1990 site assessment <br /> 2291 West Mcwck Lcme StAite- 13100 .Sfoc�fovn, G,A 95207 <br /> • Zed 209,472.7700 • Fo>c 209.472.7986 • )V{oclesto Ted. 209.525.8444 <br /> A ,PNofessionnj CoePoratiovj <br />