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r <br /> ►, 2 /3f/t/ <br /> CV'lrWl'jk)051. JJA (CVN LNOT3 -110 J(1 STATE OF WISCONSIN <br /> DATE: February 12, 1986 FILE REF: 4410-2 <br /> Steve Reynolds - Dane County Zoning Commission <br /> FROM: Daniel Carey - Environmental Engineer, Bureau of Solid Waste <br /> Management <br /> 9.. r$ Marie Stewart - Solid Waste Area Investigator, Madison Office <br /> SUBJECT: Proposed Zoning Change and Conditional Use Permit for a Quarry <br /> Adjacent to the Refuse Hideaway Landfill , DNR License #1953, Dane <br /> County <br /> In response to your request we have examined the proposed zoning change and <br /> have the following comments and recommendations for the proposal . <br /> Comments <br /> 1 . The limits of the landfill and the proposed quarry area for the change in <br /> zoning shown on the application are not consistent with the landfill <br /> 'plans approved by the Department. Attachment 1 and 2 are photocopies <br /> from the plans. We have labeled the boundary of the proposed area as we <br /> interpret it, and the limits of the landfill as shown on the plans. The <br /> proposed area apparently overlaps the landfill along the southwest and <br /> southern sides. <br /> 2. Attachments 1 and 2 also show that several rainfall runoff swales and <br /> ditches are planned for the proposed area. They would need to be <br /> rerouted if the quarry was developed. <br /> 3. Three cross sections, looking toward the west, are located on <br /> Attachment 2 and are included as Attachments 3, 4, and 5. The <br /> relationship between the landfill , bedrock, and the proposed boundary are <br /> shown on the cross sections. The landfill is required to maintain a ten <br /> foot thickness of soil between the refuse and the bedrock surface. The <br /> soil layers are intended to act as a partial liner by slowing down the • <br /> flow of leachate out of the site, and reducing the strength of the <br /> leachate. In some sections the proposed boundary cuts into the 10-foot <br /> thick soil layer. <br /> 4. The Department would be very concerned that the potential effects of <br /> blasting and excavating next to the landfill could disturb the in-place <br /> soil and bedrock. Blasting is also a technique used in developing water <br /> supply wells located in bedrock. It works by opening cracks and fissures <br /> in the rock and thereby increasing groundwater flow. If blasting opened <br /> cracks in the weathered rock leachate flow from the site could increase, <br /> and may cause additional impacts to groundwater. <br /> RECEIVED <br /> / <br /> FEB 13 1990 <br /> DANE COUNT? <br /> ZONING <br />