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V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director <br /> Signature: Date: September 6, 2013 <br /> 2 p� <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: November 29, 2012 Response Date: December 12, 2012 <br /> RB Staff: James L.L. Barton, PG Response: Concurrence <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(8/3/2019)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 /> Page 3 <br />