ARCHIVED REPORTS_2010 ANNUAL REPORT

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Nestle USA, Inc., Ripon, California March 31, 2011 2010 Annual Report 2. justification for screening out certain remediation technologies from further evaluation in the vicinity of the City of Ripon waste water treatment plant (WWTP). The 2011 Revised FS report, submitted to the RWQCB on January 28, 2011, addressed these requests as follows: • ECM prepared a detailed description and evaluation of previous remediation technologies and remedial approaches tested or applied at the Site. This information is presented in Appendix A of the 2011 Revised FS report. • AMEC prepared a focused feasibility analysis of: o in-situ air sparging (IAS; biosparging), o bioaugmentation, and o groundwater recirculation with ex-situ treatment. • AMEC provided additional justification for retaining intrinsic remediation (IR) as an appropriate treatment of the dissolved phase COCs by analyzing geochemical indicator parameters in groundwater samples from select monitoring wells during the Second and Third Quarter monitoring events. AMEC used the results to document the occurrence and rate of IR occurring at areas of VOC impacts across the Study Area. The analysis is included in the 2011 Revised FS as Appendix B. The details of this study will be used to develop an IR program for the Study Area as a final remedy. • ECM used the Groundwater Model to validate the updated remedial alternatives proposed in the 2011 Revised FS report. 2.6 WATER MANAGEMENT PLAN FOR THE RIPON STUDY AREA Nestle prepared the Water Management Plan for the Ripon Study Area (WMP) for water users, providers, and regulators (stakeholders) to address issues related to water quality and water resources within the Study Area. The goals of the WMP are: 1. Maintain and protect groundwater quality in the Study Area; 2. Identify predominant factors that influence groundwater quality; 3. Identify processes that can help maintain or improve groundwater quality; and 4. Implement these processes through cooperation among key stakeholders. Nestle has already established the framework for implementation the WMP with the completion of work in several key areas including: 1. Completion of a summary of key stakeholders who have a direct impact on water quality as part of the WMP; 2. Implementation of a comprehensive monitoring program; 3. Development of a WRCP to provide replacement water to affected users, as necessary; 4. Completion of additional work on a comprehensive well inventory for the Study Area. Additional historical data sources were investigated in 2010. 5. Focused group activity by select stakeholders to address water quality issues such as local management of total dissolved solids (TDS). 6. Development of "buffer zones" between the COC plume in each aquifer and future well placement through the use of the Groundwater Model. The buffer zones identify areas 5