Laserfiche WebLink
Californi egional Water Quality Coni of Board <br /> l\- Central Valley Region <br /> v Robert Schneider,Chair <br /> Linda S.Adams Arnold <br /> Secretaryfor Sacramento Main Office Schwarzenegger <br /> Environmental 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 Governor <br /> Protection Phone(916)464-3291 •FAX(916)464-4645 <br /> http://www.waterboards.ca.gov/centralval ley <br /> 3 October 2006 G°�ECOdEED <br /> OCT - 6 2006 <br /> Nestle USA Inc. ENVIRONMENT HEALTH <br /> Attention: Mr. Mike Desso pEAw/SERVICES <br /> 800 North Brand Boulevard <br /> Glendale, California 91203 <br /> DRAFT LOWER AQUIFER ZONE INVESTIGATION AND ADDITIONAL WELL <br /> INSTALLATION WORK PLAN, FORMER NESTLE USA, INC. FACILITY, RIPON, SAN <br /> JOAQUIN COUNTY <br /> California Regional Water Quality Control Board, Central Valley Region (Regional Water <br /> Board) staff has reviewed the Draft Lower Aquifer Zone Investigation and Additional Well <br /> Installation Work Plan, Former Nestle USA Inc., Facility (Work Plan), dated September 15, <br /> 2006, and received 15 September 2006. The Work Plan was prepared by Environmental <br /> Cost Management, Inc., (ECM), on behalf of Nestle USA, Inc. (Nestle) for the former facility <br /> located at 230 Industrial Avenue, Ripon, California (former facility). The comments below <br /> are based on Regional Water Board staff review of the Work Plan. Nestle should submit a <br /> final Work Plan incorporating the Regional Water Board's comments. <br /> Nestle prepared the Work Plan to comply with Required Actions No. 6, 9, and 10 of Cleanup <br /> and Abatement Order No. R5-2006-0720, issued by the Regional Water Board on 24 July <br /> 2006. Required Action No. 6 directs Nestle to investigate the recent increasing <br /> concentrations of trichloroethylene (TCE) and cis-1,2-dichloroethylene (cis-1,2-DCE) <br /> concentrations in Lower Aquifer monitoring wells by delineating the full extent of these <br /> contaminants in the Lower Aquifer. Required Action No. 9 directs Nestle to complete <br /> installation of a monitoring well cluster west of monitoring well cluster M-32 which would <br /> include one well screened in the Upper Aquifer, one in the Intermediate Aquifer, and one in <br /> the Lower Aquifer. Required Action No. 10 directs Nestle to complete installation of guard <br /> monitoring wells between the former facility and City of Ripon water supply wells MW-13 and <br /> MW-14. <br /> The purpose of the groundwater investigation work is to complete the delineation of <br /> contamination emanating from the former facility and migrating within the Upper, <br /> Intermediate, and Lower Aquifers. Also, the purpose is to identify all impacted or potentially <br /> impacted water supply wells. The results of the investigation should allow Nestle to revise <br /> interim remedial actions taken to date, if deemed necessary. Also, the results should allow <br /> Nestle to implement the most appropriate technologies to restore all three aquifers to <br /> conditions that protect their beneficial uses. <br /> California Environmental Protection Agency <br /> Cl*Recycled Paper <br />