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k" KLEINFELDER <br /> 2. TPH-Gasoline and trace concentrations of UEHs were detected in the groundwater <br /> sample obtained from EB-1/TW-1 (east side of tracks). Neither were detected in the <br /> groundwater sample obtained from EB-2/TW-2. It is Kleinfelder's understanding that <br /> dewatering will not occur during construction or installation of the drilled piers. <br /> However, minor volumes of water may be displaced during the pouring of concrete for <br /> the drilled piers. Kleinfelder recommends that as a precautionary measure, all water <br /> displaced during the concrete pour be contained on site, and be allowed to percolate back <br /> to the subsurface. If drilling muds are used during the drilling for the piers, the excess <br /> water would likely be incorporated into the mud through the drilling process and would <br /> be disposed of along with the mud. <br /> This recommendation must be approved by PHS/EHD prior to implementation. <br /> 3. Kleinfelder gives no legal advice related to the proposed project and the existence of the <br /> low levels of contamination present, either expressed or implied. <br /> 4. This report should be submitted by the City of Stockton to PHS/EHD and the <br /> CVRWQCB for review and comment. <br /> This report and the conclusions and recommendations presented, are subject to the "Limitations" <br /> presented in Chapter 8 of this report. <br /> 20-3712-08.E01/2018R510 Page 14 of 16 <br /> © 1998, Kleinfelder, Inc. July 9, 1998 <br />