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KLEINFELDER <br /> 2 PEA OBJECTIVES <br /> past chemical use practices on-site <br /> potentially <br /> hazardous substance(s), which <br /> A PEA is conducted to evaluate whether Curren or p <br /> have resulted e t to public heath orual lons of the environment. <br /> may pose a threat to p <br /> The objectives of the PEA include: past use, storage, <br /> istorical <br /> on for <br /> ions of the <br /> i <br /> • dposall, orrellea ehof hazardous wastes/subs alnces at the site; <br /> Establishing through a field sampling and analysis program, the nature of <br /> • hazardous wastelsubstances (if present), their concentrations and potential to be <br /> present in soil; <br /> o public health and/or the environment posed by <br /> Estimating the potential threat t <br /> hazardous constituents at the site using a industrial land-use scenario; <br /> On the basis of the information developed during the PEA, the DTSC will make an <br /> informed decision regarding potential risks posed by the site. Possible outcomes of the <br /> PEA decision are: <br /> Further investigation through the Remedial Investigation/Feasibility Study (RI/FS) <br /> be significantly impacted by a hazardous substance <br /> process if the site is found to <br /> release; <br /> Perform a Removal Action Plan if localized impacts by a hazardous substance <br /> release is found. <br /> If the site is not significantly impacted, and the risks to human health and tha <br /> environment are found to be within acceptable levels based on the screening level risk <br /> assessment, an issuance of a "No Further Action" and site approval finding will be <br /> made by DTSC. <br /> 57252.T02/ST05R999/DH:Iv Page 4 of 29 <br /> ©2005 Kleinfelder, Inc. September 1,2005 <br />