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in KLEINFELDER <br /> ` were detected in two of the four groundwater samples collected. The levels detected at <br /> the depths (first encountered groundwater) and locations in groundwater at the site <br /> however were below state and federal Maximum Contaminant Levels (MCLs) for <br /> ww. drinking water. The extent and distribution of hydrocarbons in groundwater is unknown <br /> at this time. Kleinfelder at this time does not recommend clean-up or additional <br /> groundwater monitoring activities related to petroleum constituents detected in <br /> groundwater, based on the relatively low levels detected and since applicable petroleum <br /> constituents are below drinking water standards(MCLS). <br /> 3) Kleinfelder anticipates that a final excavation volume of approximately 47,000 cubic <br /> j yards will need to be removed within the oil spill footprint during clean-up activities. <br /> Please note onsite stockpiles of petroleum impacted soil from Chevron's clean-up <br /> 1 activities are not included in this estimate. Kleinfelder anticipates remedial excavation <br /> depths will range from 12 to 20 feet bgs. The estimated depths of petroleum impacted soil <br /> and anticipated future excavation depths are illustrated on attached Plates 3 and 4. <br /> 4) Kleinfelder recommends submitting a workplan to SJC/EHD detailing proposed remedial <br /> activities, potential additional profile soil sampling and analyses for disposal purposes <br /> and a confirmation soil sampling plan. <br /> For additional discussion of Kleinfelder's findings please refer to the"Discussion of Findings"in <br /> Section 5 and the"Conclusions and Recommendations" in Section 6. <br /> This report, and the conclusions and recommendations presented in this Executive Summary, are <br /> subject to the "Limitations"presented in Chapter 7 of this report. Any other party(other than the <br /> r Pegasus MH Ventures I), or regulatory agencies having enforcement jurisdiction for this site) <br /> who would like to use this report shall notify Kleinfelder, Inc. of such intended use in writing for <br /> permission. <br /> ". i <br /> 1 <br /> � S <br /> l <br /> � L <br /> 1 <br /> f <br /> 1 44843.T03/STO4R1025 Page 2 of 16 <br /> Copyright 2004 Kleinfelder,Inc. August 6,2004 <br />