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Scott Mansholt - 5 - 6 November 2006 ' <br /> Chevron — Catellus Property <br /> I concur that the investigation findings has partially or adequately delineated certain areas of <br /> the site where petroleum hydrocarbons were identified. However, I also agree that those <br /> areas requiring additional borings, sampling and analysis recommended by SAIC needs to be <br /> investigated to more adequately define the extent of OVP/TAOC crude oil impacts at the site. <br /> For Regional Water Board staff to make a more thorough assessment of potential water <br /> quality impacts, water quality parameters for a representative number of site groundwater <br /> samples (in addition to TDS) should include General Minerals, electrical conductivity, ammonia <br /> as nitrogen, nitrate as nitrogen and total nitrogen. <br />