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NO <br />d <br />0 <br />on ground water from years of this condition have been minimal in <br />consideration of local ground water quality and the hydrogeologic <br />conditions at the site. The RWQCB is in receipt of ground water <br />monitoring reports from the site and conditions were evaluated in <br />the SWAT for the landfill (dated September 1988). <br />Installation of an LCRS for existing waste is not feasible. <br />Installation of a line and LCRS for continued disposal of treated <br />ASW and inert waste may not be warranted based on the limited <br />potential effects of the disposal as described in the Designated <br />Level Assessment (Section 2.5) and the Corrective Action <br />Evaluation (Section 10) of the RWD which is Appendix D to the <br />PSR. Section F.1 and F.2 of the PSR discuss potential effects of <br />the existing and future ASW on ground water. As indicated in the <br />PSR, capping of the site is recommended by Kleinfelder to limit <br />any effect to ground water from the existing waste and future <br />ASW. Modelling,performed indicated that capping (cap assumed to <br />limit infiltration to 10%) within 5 years will effectively stop <br />contaminant migration through the vadose zone. This is well <br />within the ten year period for which it is estimated that <br />uncovered waste display activities potentially would increase TDS <br />by only 100 mg/l. These conditions, in light of existing local <br />ground water conditions and the apparent limited effect that the <br />existing site has had on ground water, do not appear to make <br />installation of a LCRS feasible or necessary. <br />18 <br />