5.4. SR 05-17-2010 - Laserfiche WebLink

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FW Elk .River Landfill - Review of Phase IIZ Report for MSW.Expansion:txt The expected life of the facility is more than 19 years. The total remain7ng life of the existing permitted landfill area and the expansion area is more than 28 years. The ex7sting and proposed monitoring wells are located at the distance roughly 200,feet from the ultimate fill boundaries. The functionality of an early warning monitoring system during the operational life of the site with wells located in the proposed positions is questionable. The overall schedule for the placement of monitoring wells in relation to the site development needs to be further evaluated. A sequenced approach to monitoring system development is necessary when landfill development progresses in a downgradient fashion and the projected life/capacity of the proposed development is extended. It is suggested that the wells proposed far the southern property boundary be moved northward to a position which coincides with the ten-year waste fill limit. These wells would subsequently be replaced with wells located at the south property boundary.when the fill progresses to this point. It should be noted that if the waste receiving rates decrease, the wells would be in position to monitor the facility on an expanded time frame. conclusion: overall, the report does a very good job of characterizing the. complex geology of the expansion site, z think one of the next steps will be to sit down with WMI to discuss the approach to the monitoring network. wMZ is proposing well installation this summer, so this should happen soon. For wMI's benefit, it would be appropriate for the city, county and the MPCA to be on the same proverbial page. het me know what you think of these comments. Thanks, Matt. Matthew ~edvina, PE mlledvina~ergltd.com 612.339.2316 Direct 612.325.8589 Cell 612.339.4990 Fax Page 3