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M. Scott Mansholt <br /> Mountain House Site #1 5 26 March 2007 <br /> Based on our review, Regional Water Board staff has the following comments.- <br /> • The report did not evaluate or determine if the TPHg at 6,400 pg/L reported in <br /> groundwater may be due to interference caused by elevated TPHd concentrations <br /> reported in soil. Clarification is needed. <br /> A time schedule for submitting a site-specific "Soil Management Plan" (SMP) needs to <br /> be provided. The SMP must include names, phone numbers, schedule, etc. and pians <br /> describing the notification process, the mechanism for implementing any future cleanup <br /> activities when petroleum-affected soil is encountered. <br /> By 15 May 2007 please submit an amended report addressing the items outlined above. <br /> Regional Water Board staff cannot consider no further action until the SMP has been <br /> submitted for review and the matter of TPHg reported in groundwater is addressed. <br /> If you have any questions or comments, please contact Dean Hubbard at (559) 445-5179. <br /> SHELTON R. GRAY C. DEAN HUBBARD <br /> Senior Engineering Geologist Engineering Geologist <br /> P.G. No. 6357 <br /> cc: Michael Infurna, San Joaquin County EHD, Stockton <br /> Michael Hurd, SAIC, Oakland <br /> R/common/CDH/Chevron/Mountain House#I/risk eval <br />