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Second Quarter 2011 Site Status Report August 11, 2011 Former Nestle USA, Inc. Facility, Ripon, CA Eighteen' domestic wellsz, including one at the Ripon Christian School (RC-1) and one at the Ripon Public School (RPS-1) (grab sample from sampling port). ECM sent all of the samples to TestAmerica Laboratory in Pleasanton, California for analysis using either United States Environmental Protection Agency (USEPA) Method 8260B or USEPA Method 524.2, as required by the Monitoring and Reporting Program (MRP 135-2010-0810). Figure 3 through Figure 5 depict the potentiometric surface maps for the Upper, Intermediate, and Lower aquifers. Table 1 through Table 5 present pertinent well information, water level elevation, and water quality analytical data. Appendix A and Appendix B include field log and laboratory data with chain of custody information, respectively. Please feel free to contact me at (415) 282-1979 with any questions or concerns. Respectfully, Environmental Cost Management, Inc. /QgOFESS/p��4 Wo. C66647 e z Brent Searcy exp. Senior Engineer sj CIVIC Q 9�Of CAIiF�� Enclosures: Figures (5) Tables (7) Appendices (2) cc: Mike Desso — NUSA (CD) Distribution List In June 2011, the homeowner at 5725 Hall Road disconnected the replacement well from the treatment system when the well pump malfunctioned, and reconnected the 'old well' to the treatment system. Because both the replacement well and the old well were sampled in June, technically 19 domestic wells were sampled in the Second Quarter 2011. The June results for the old well are presented in Table 5. 2 The well at 415 Parallel Avenue was not sampled because there was no access to the property. The property has been condemned by the City of Ripon and ECM personnel confirmed the property was not unoccupied during the sampling period. 2