ARCHIVED REPORTS_SITE STATUS REPORT 2010 3RD QUARTER

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P'NMENTAL COST Managing Cast and Liabilltv 3525 Hylamd Avenue,Suft 200 Costa Mesa,Caftfornia 926H November 12, 2010 Mr. James Brownell, PG Central Valley Regional Water Quality Control Board 11020 Sun Center Drive, #200 Rancho Cordova, CA 95670 Subject: Third Quarter 2010 Site Status Report Former Nestle USA, Inc. Facility 230 Industrial Avenue Ripon, CA 95366 Dear Mr. Brownell: On behalf of Nestle USA, Inc. (Nestle), Environmental Cost Management, Inc. (ECM) has prepared this Third Quarter 2010 Site Status Report for the former Nestle facility located at 230 Industrial Avenue (Site) in Ripon, California (Figure 1). This report presents the results of groundwater monitoring performed from July through September 2010. The field work performed during the Third Quarter 2010 for the monitoring program is summarized below. • On July 19, 2010, ECM measured water levels in 123 wells (Figure 2). • On July 19, 2010, ECO:LOGIC Engineering measured water levels for nine City of Ripon piezometers and recorded water levels for 14 City of Ripon municipal wells and monitoring wells. • On July 19, 2010, Lawrence & Associates measured water levels for 11 Neenah Paper Company wells. • Between July 2 and August 25, 2010, ECM collected samples from: o Seventy-two Nestle wells (41 wells using Passive Diffusion Bags, three grab samples from extraction wells, 24 wells using low flow purge method, and 4 with dedicated pumps), o Eight City of Ripon production wells (grab sample from sampling port), o Three Neenah Paper Company wells, and o Nine domestic wells including one at the Ripon Christian School and one at the Ripon Public School (grab sample from sampling port). The well at 415 Parallel Avenue was not sampled because there was no access to the property. • On August 2, 3 and 5, 2010, twenty-eight wells were sampled for intrinsic remediation parameters using low flow purging and sampling techniques.