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Californioegional Water Quality Cobol Board ` <br /> �`\'� Central Valley Region - ..° <br /> Karl E. Longley,ScD,PE, Chair <br /> Linda S.Adams Arnold <br /> Secremryfor Fresno Branch Office Schwarzenegger <br /> hin tromnenta/ 1685 E Street,Fresno,California 93706 Governor <br /> Protection (559)445-5116•Fax(559)445-5910 <br /> hltpa/www,walerboards.ca.gov/centralvalley <br /> 16 May 2008 HE((�`'�ME`" <br /> M. Scott Mansholt MAY 19 1008 <br /> Chevron Environmental Management Company ENVIRONMENT HEALTH <br /> 6001 Bollinger Canyon Road, Rm K2066 PERMIT/SERVICES <br /> San Ramon, California 94583-2324 <br /> REQUEST FOR NO FURTHER ACTION, FORMER LYOTH LOADING STATION AND <br /> LYOTH OFFSITE, 26501 SOUTH BANTA ROAD, TRACY, SAN JOAQUIN COUNTY <br /> Regional Water Board staff has reviewed the 17 April 2008 No Further Action Required report, <br /> submitted on behalf of Chevron by Science Applications International Corporation (SAIC). <br /> The adjacent properties are located approximately two miles southeast of Tracy, in southern <br /> San Joaquin County. <br /> The report provides documentation for a No Further Action Request in accordance with <br /> Central Valley Regional Water Quality Control Board's 16 April 2004 update to Appendix A of <br /> the Tri-Regional Board Staff Recommendations for Preliminary Investigation and Evaluation of <br /> Underground Tank Sites - No Further Action Requests (NFAR). More specifically, the request <br /> was conducted in accordance with: Section 6.5 NFAR for Cases Exceeding Water Quality <br /> Objectives. <br /> During their NFAR support documentation, SAIC concluded that the California Office of <br /> Environmental Health Hazard Assessment (OEHHA) review of the 1999 human health risk <br /> assessment (HRA) amended 2002 (completed for the former Lyoth Loading Station site) , <br /> found that: ...the "human health and safety is not affected by the conditions remaining at the <br /> site, where according to OEHHA the theoretical lifetime cancer risk calculated from the <br /> updated HRA is within an acceptable risk range of 1 X 10-4 to 1 X 10-6 for an assumed <br /> residential-setting scenario". <br /> Currently, the Lyoth Loading Station site, owned and operated by Hoffman Brothers <br /> Harvesting, is a commercial/industrial facility. According to the San Joaquin County Assessors <br /> records, "Use Description" for Hoffman's parcel is designated: "Automotive Uses". <br /> The parcel designated as the Lyoth Offsite, adjacent north beyond the UPRR tracks, owned by <br /> Joe Kowalski, is a separate parcel. In 2005, this property was addressed and investigated <br /> separately and the HRA documents did not include a risk assessment for this property. <br /> Based on Regional Water Board staff review, we find that: <br /> • According to historical and available documentation, the current and anticipated site <br /> use for Hoffman's property is, and unless changed, will remain for commercial and/or <br /> industrial purposes; <br /> California Environmental Protection Agency <br /> C5 Reeyc(ed Paper <br />