Agenda - Council - 09/25/1990 - Laserfiche WebLink

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I I i I I (1) (2) (3) (4) proposed fill and trench areas are within 1000 feet of the nearest edge of the right-of-way of any state, federal, or interstate highway; any public park; or an occupied dwelling; any wetland or public waters would be impacted during development of the site; there are erosion, drainage or other natural processes occurring in the area which could lead to problems at the site or site failure; a drinking water supply reservoir would be impacted by the site; any ground water which is present is: I I I (a) a water supply (b) is capable of being withdrawn at a sustained yield of one gallon per minute (c) recharging to another aquifer; (6) ground water is not protected by an aquiclude; and (7) ground water cannot-be monitored by routine methods. Sites P, D and Q exceed almost all of these secondary criteria. Site P has numerous residences located within 1000 feet, wetlands and related areas of drainage located in the southwestern section of the site that will be impacted or destroyed during construction and operation. The glacial drift aquifer(s), used as a source for an estimated 30-50% of the area water supply wells, could be quickly impacted. The bedrock St. Lawrence formation and Franconia Sandstone aquifer are also at risk of contamination due to the interconnection with the glacial drift via the known tunnel valley present on the southeast portion of the site. The groundwater present below Site P is capable of sustaining yields tens to hundreds of times greater than the one gallon per minute criteria. Groundwater monitoring at Site P through routine methods would be possible. However, the differentiation of groundwater impact sources between Site P and the existing Anoka Regional Sanitary landfill (ARSL), a known source of groundwater contamination, would be very difficult. 2O I .ta..z