1999-04-12_HYDROLOGY - M1974052 (7)

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' CG12S, Inc. • 1 1 1 1 1 1 1 1 • leachability of various samples. [t appears that under certain conditions, recycled asphalt is more reactive with fluids than coal ash. Recycled concrete had minor reactivity with different leaching fluids. A summary of samples exceeding a water quality standard in the SELP testing is presented in Table 6. The TCLP testing showed dramatically reduced analyte concentrations. Boron, fluoride and manganese were the analytes the exhibited the most leachability above water quality standards in this test. The SCLP was identical to the TCLP testing with the exception that the gravel quarry water was used as the leaching medium. A review of Table 4 shows that boron was the most leachable element. Background levels of sulfate and fluoride exceeded water quality standards and were high enough to mask all leaching characteristics of these compounds. The SGCLP showed that boron, fluoride and sulfate were by far the most leachable compounds. Boron and sulfate concentrations decreased dramatically compared to pore volume flow through. 4.0 PILOT STUDY 4.1 Project Start-ua The project start-up will consist of developing a work plan and a site specific Health and Safety plan. All required permits will be obtained prior to conducting the investigation. Utility companies will be contacted for the location of all underground utilities prior to commencing investigative activities (telephone, sewer, electrical, cable television, natural gas lines, oil and gas pipelines, buried tanks and wells). ' 4.2 HYdroloev Determioatioos Prior to initiating coal ash placement, the local groundwater flow direction will be estimated from ' groundwater monitoring wells installed to determine hydraulic characteristics of the local a1c uifer and local groundwater quality. It is anticipated that ten wells will be installed [o monitor variations ' in local aquifer characteristics as a result of coal ash burial. The hydraulic conductivity will be estitated by performing slug and/or aquifer testing. Prior to initiating the pilot projectgroundwater ' 9