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V. Local Agency Representative Data <br /> Name: Adrienne Ellsaesser, REHS Title: Program Coordinator <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: James L.L. Barton, PG Response: <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> Soil Gas Survey results and Human Health Risk Assessment reported in First Quarter 2011 Groundwater Monitoring report <br /> Soil Vapor Survey report, Human Health Risk Assessment, and Closure Report(8/3/2011)which showed that locally, TPHg <br /> and benzene in soil gas exceeded Region II ESLs for residential land use, but the HHRA, utilizing the RISC-4 program, <br /> concluded that_contaminants in soil gas and soil do not exceed 1x10-6 cancer risk or a health hazard of 1 for inhalation of <br /> indoor air or for dermal contact with or ingestion of soil. Water samples collected October 11, 2012 from ten residential <br /> domestic wells around and on the site contained less than quantifiable concentrations of all contaminants of concern. <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br /> I <br /> Page 3 <br />