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--- ------- --- ---- KLEINFELDER <br /> Four background soil samples (see Plate 2) will be collected for analytical result <br /> comparison to concentrations of COPC detected at the site. Each of the four discrete <br /> background soil samples are proposed along the eastern border of the site near a <br /> vacant field. If right of entry can be acquired, soil sampling is proposed offsite and <br /> approximately 75 east of the eastern property boundary. The background soil sample <br /> locations were selected in the same soil type as the site (based on a Soil Survey of San <br /> Joaquin County, United States Department of Agriculture, October 1992). The soil type <br /> is summarized in Section 4.1, Table 2. Soil at the site and east of the site (proposed <br /> background sampling locations) were mapped as Jacktone-Urban land complex (See <br /> Appendix D). The adjacent property to the north is mapped as Urban Land and the <br /> western boundary is Stanislaus Street, beyond which is commercial/industrial sites. <br /> Residential housing is noted to the south. Offsite background sampling to the east will <br /> require permission and right-of-entry agreements with the land owners and Delta <br /> Plating prior to collection of these background samples. Otherwise background <br /> sampling is proposed onsite at approximately equidistant locations along the eastern <br /> site boundary. <br /> Kleinfelder proposes one surface sample from each of the proposed sample locations <br /> within the Plating Room be analyzed for one or more of the seven COPC. Five soil <br /> samples (S2 through S5) and four background samples (BGS-1 through BGS-4) will be <br /> analyzed for the following:: <br /> • Copper, Nickel, Aluminum and Chrome III by EPA Method 6010 <br /> • Cn by EPA Method 9010 <br /> • PH by EPA Method 9045 <br /> • Cr+6 by EPA Method 71 b <br /> Six of the 26 soil samples (S6 through S11) will be analyzed for the following: <br /> • Chrome III by EPA Method 6010 <br /> • Cr+6 by EPA Method 719 <br /> Fifteen of the remaining soil samples (S16 through S26) will be analyzed for various <br /> COPC as shown on Table 7. <br /> 57252.T02/ST05R999/DH:Iv Page 15 of 29 <br /> ©2005 Kleinfelder, Inc. September 1,2005 <br />