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M. Scott Mansholt 2 - . 16 May 2008 <br /> _,yoth-Loading Station and A Offsite <br /> NFA Request—Additional Information <br /> • We were previously informed that the Hoffman Brothers Harvesting would continue <br /> operating at that location; the owners also had indicated future plans to install additional <br /> "concrete tilt-up structures" at their business facility; <br /> • Considering that the current and future site use is commercial and/or industrial, <br /> Chevron's representative should prepare an addendum to OEHHA's HRA findings that <br /> are consistent with the actual and anticipated future use. The amendment should <br /> evaluate site conditions/analytical results described in the former HRA and compare <br /> those findings to the 2007 Environmental Screening Levels (ESLs)' using applicable <br /> exposure soil screening levels for commercial/industrial and construction/trench worker <br /> scenarios; and, <br /> • A separate Human Health Screening Evaluation (HHSE) reflecting current site <br /> conditions needs to be completed for the Lyoth Offsite parcel. <br /> California Regional Water Quality Control Board, San Francisco Bay Region, 2007. "Screening for Environmental <br /> Concerns at Sites with Contaminated Soil and Groundwater,"November. <br /> By 1 July 2008, please provide an HRA amendment for the Hoffman property, reflecting a <br /> comparison of the former HRA findings using the applicable ESLs risk scenarios outlined <br /> above. <br /> By 1 September 2008, please provide the HHSE for the Lyoth Offsite property. <br /> If you have any questions regarding the matters discussed above, please call Dean Hubbard <br /> at (559) 445-5179. <br /> SHELTON R. GAY C. DEAN HUBBARD <br /> Senior Engineering Geologist Engineering Geologist <br /> P.G. No. 6357 <br /> CDH: cdh <br /> cc: Harlan Knoll, San Joaquin County EHD, Stockton <br /> Hoffman Brothers Harvesting, Tracy <br /> Ken Mahon, California Northern Railroad, Woodland <br /> Joe Kowalski, Escalon <br /> Jeffory J. Scharff, Sacramento <br /> Lee Higgins, SAIC, San Ramon <br /> Michael Hurd, SAIC, Oakland <br /> CDH/R\slaHIOVP\LyothNFAamendinfo/May 08 <br />