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Tracie Billington, P.E. <br /> August 14, 1992 <br /> Page Six <br /> The Department cautions DDRW Tracy not to use estimates to <br /> guide their remedial measures. The Department will evaluate <br /> the success of remedial measures based on their ability to <br /> meet treatment goals (i.e. established aquifer cleanup goals <br /> or reductions in the mass quantity) . <br /> 14) Pages 3-5 and 3-6 outline previous and current modeling of <br /> the ground water at DDRW Tracy. <br /> The Department will require hard monitoring data to support <br /> any conclusions based on models. <br /> 15) Page 3-14 section 3 . 3 . 1. 1. 6 further outlines the conceptual <br /> design of the performance monitoring program. <br /> The Department again iterates its concern over separate <br /> monitoring programs. We would prefer to have one <br /> comprehensive monitoring program for -the entire site. The - <br /> performance monitoring for the ground water treatment can be <br /> incorporated into it. <br /> Jim Pinasco <br /> Waste Management Engineer <br />