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' CGRS, Inc. • • <br /> ' leachability of various samples. It appears that under certain conditions, recycled asphalt is more <br /> t reactive with fluids than coal ash. Recycled concrete had minor reactivity with different leaching <br /> fluids. A summary of samples exceeding a water quality standard in the SELP testing is presented <br /> ' in Table 6. <br /> ' The TCLP testing showed dramatically reduced analyte concentrations. Boron, fluoride and <br /> manganese were the analytes the exhibited the most leachability above water quality standards in <br /> ' this test. <br /> ' The SCLP was identical to the TCLP testing with the exception that the gravel quarry water was <br /> used as the leaching medium. A review of Table 4 shows that boron was the most leachable <br /> ' element. Background levels of sulfate and fluoride exceeded water quality standards and were high <br /> enough to mask all leaching characteristics of these compounds. <br /> ' The SGCLP showed that boron, fluoride and sulfate were by far the most leachable compounds. <br /> Boron and sulfate concentrations decreased dramatically compared to pore volume flow through. <br /> 1 <br /> 4.0 PILOT STUDY <br /> 4.1 Project Start-up <br /> ' The project start-up will consist of developing a work plan and a site specific Health and Safety <br /> plan. All required permits will be obtained prior to conducting the investigation. Utility companies <br /> ' will be contacted for the location of all underground utilities prior to commencing investigative <br /> activities (telephone, sewer, electrical, cable television, natural gas lines, oil and gas pipelines, <br /> ' buried tanks and wells). <br /> ' 4.2 Hvdroloay Determinations <br /> Prior to initiating coal ash placement, the local groundwater flow direction will be estimated from <br /> ' groundwater monitoring wells installed to determine hydraulic characteristics of the local aquifer <br /> and local groundwater quality. It is anticipated that ten wells will be installed to monitor variations <br /> ' in local aquifer characteristics as a result of coal ash burial. The hydraulic conductivity will be <br /> estimated by performing slug and/or aquifer testing. Prior to initiating the pilot project groundwater <br /> 9 <br />