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California&gional Water Quality Conol Board <br /> v Central Valley Region <br /> Linda S.Adams Karl E.Longley,ScD,P.E.,Chair Arnold <br /> Secretaryfor Schwarzenegger <br /> Environmental Sacramento Main Office Governor <br /> Protection 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 <br /> Phone(916)464-3291 •FAX(916)464-4645 <br /> http://www.waterboards.ca.NTCn/i�D <br /> MAY � � zoos <br /> 8 May 2008 ENVIRONPo1ENT HEALTH <br /> PERMIT/SERVICES <br /> Mr. Mike Desso <br /> Nestl6 USA Inc. <br /> 800 North Brand Boulevard <br /> Glendale, California 91203 <br /> INTERIM REMEDIAL ACTION GROUNDWATER EXTRACTION, FORMER NESTLE <br /> USA, INC., FACILITY, 230 INDUSTRIAL AVENUE, RIPON, SAN JOAOU/N COUNTY <br /> California Regional Water Quality Control Board, Central Valley Region (Regional Water <br /> Board) staff has reviewed the 4 February 2008 Interim Remedial Action Plan Well Installation <br /> and Aquifer Test Report(Test Report). Also, staff has reviewed the 4 April 2008 Interim <br /> Remedial Action Plan Groundwater Extraction System Startup Report(Startup Report). The <br /> Reports were prepared by Environmental Cost Management, Inc. (ECM), on behalf of Nestl6 <br /> USA, Inc. (Nestl6) for their former coffee decaffeination facility located at 230 Industrial <br /> Avenue, Ripon, California (Former Facility). Nestl6 submitted the Reports to document <br /> progress on Cleanup and Abatement Order No. R5-2006-0720 Required Action No. 14, <br /> issued by the Regional Water Board on 24 July 2006. <br /> Interim Remedial Action Background <br /> Regional Water Board staff conditionally approved Nestl6's 10 August 2007 Interim <br /> Remedial Action Plan (IRAP) in a letter dated 19 September 2007. Also, staff conditionally <br /> approved Nestl6's 18 October 2007 Industrial Avenue Interim Remedial Action Work Plan <br /> (Work Plan) in a letter dated 19 November 2007. The IRAP evaluated remediation <br /> alternatives for groundwater impacted by volatile organic compounds (VOCs) released from <br /> the Former Facility. The VOCs, primarily trichloroethene (TCE), were identified beneath the <br /> Former Facility during cone penetrometer test investigation work performed in 2005 and <br /> reported in Geomatrix Consultants, Inc.'s (Geomatrix) 6 April-2006 Initial Testing and <br /> Characterization Report, In Situ Groundwater Remediation Program. Geomatrix identified <br /> concentrations of TCE up to 7,800 micro grams per liter (µg/L) in groundwater within two <br /> sand layers beneath the Former Facility. The IRAP documented field investigations that <br /> ECM conducted to determine if the source of the VOCs was within two clay layers <br /> immediately above the impacted sand layers, and within vadose zone soils between the <br /> ground surface and the water table. Also, the field investigation further characterized the <br /> lateral extent of the dissolved VOCs in groundwater within both sand layers. Based on the <br /> results of the investigation, ECM showed that the VOCs were primarily dissolved in <br /> groundwater within the saturated sand layers and not within the overlying saturated clay <br /> layers or the vadose zone. Apparently, the sand layer with the highest concentrations <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br />