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City of Ripon Well#12 <br /> Nitrate Study Report May 31,2008 <br /> 5.0 VVELL SAMPLING AND ANALYSIS <br /> SGI conducted the sampling activities for wells identified in section 4.0 as described below. <br /> 5.1 SGI Sampling of Residential Wells <br /> On January 5, 2005 an SGI geologist sampled the recommended private wells except for the Kamps <br /> well, which was sampled on March 7, 2005. The details of these sampling events are described below. <br /> 5.1.1 Method of Sampling <br /> All wells sampled were supply wells with sample ports, with the exception of the Jimco inactive well. This <br /> well was sampled using a disposable bailer. For all remaining wells that were not currently pumping, the <br /> pump was turned on and allowed to run for a few minutes before the sample was collected. At the Jimco <br /> (active) and RFS sites, the wells were currently pumping, and samples were collected from the ports <br /> promptly after being opened. Each of the required sampling bottles was filled directly from well sample <br /> ports. The bottles were then capped, labeled, and placed on ice. <br /> 5.1.2 Sample Handling and Analyses <br /> The samples collected in January were transported under chain-of-custody to JL Analytical Services of <br /> Modesto, California. The following analyses were requested for samples collected in January 2006: <br /> • VOCs by EPA Method 524.2 <br /> • SVOCs by EPA Method 625 <br /> • Inorganic and Metals by EPA Method 2001300. <br /> The purpose for conducting this suite of analyses was to evaluate whether other contaminants in addition <br /> to those reported at the RFS and Jimco sites might also potentially impact the Well 12 water supply in the <br /> future. <br /> 5.1.3 Equipment Decontamination <br /> Since all wells were sampled directly from sample ports, no decontamination of sampling equipment was <br /> necessary. <br /> R�W�l 12 Rem 5-1 The Source Grow,Inc. <br />