CCP 01-21-2003 - Laserfiche WebLink

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I I. I I I I I I I Ie I I I I I I I. I I MUSA expansions, should be discussed. For non-metro area AUARs, the AUAR must discuss the capacity of the RGU's wastewater treatment system compared to the flows from the A UAR area; and necessary improvements should be described. . If on-site systems will serve part of the AUAR the guidance in "EAW Guidelines" (pages 16-17) should befollowed. Parking garage drainage and other site-generated wastewater will be discharged directly into the City's sanitary sewer system, which is processed by the Metropolitan Council Environmental Services (MCES) system. The City of Arden Hills has confirmed that the existing sanitary sewer lines servicing the proposed campus have the capacity to handle the additional wastewater volumes required for the campus needs. There was also coordination with the MCES to confirm that their system could handle the additional volumes of wastewater. The proposed campus will add approximately 46,305 gallons per day of wastewater to the existing 52,150 gallons per day for a total of 98,456 gallons per day. While the proposed project will not require additional connections to the sanitary sewer lines located in CR F and Hamline Avenue, the development will require additional connections to the sanitary line located in Fernwood Avenue. These additional connections will be made as needed during the phased development of the AUAR study area. Calculations for determining the amount of wastewater assume that for office/limited industrial space there are three employees per 1,000 square feet, producing 15 gallons of wastewater per person per day. Guidant will work with the City of Arden Hills to detcrmine the manner in which the internal drainagc from the parking garage will be treated prior to entcring the sanitary sewer consistent with Section 1010.08 Subd. I of the City of Arden Hills ordinance. Drainage from the top uncovered level of each parking ramp will enter the city stonn water system. 19. GEOLOGIC HAZARDS AND SOIL CONDITIONS EAW: A. APPROXIMATE DEPTH (IN FEET) TO GROUND WATER: 0 Feet MINIMUM, 90 Feet AVERAGE Source: Water table elevation data was calculated using the USGS 7.5 Minute Series Topographic Map for Ramsey County, Minnesota-New Brighton quadrangle (1997) and the Geologic Atlas of Ramsey County, Minnesota Surficial l-Iydrogeolgy map (l992). APPROXIMATE DEPTH (IN FEET) TO BEDROCK: 250 Feet MlNIMUM, 300 Feet AVERAGE Source: Bedrock infonnation obtained from the Phase I ESA (November 2l, 1997). Guidant Campus Master Plan Final AUAR and Mitigation Plan - 25 - January 2003