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<br />A stormwater pond located just south of the site has been sufficiently designed to <br />handle the site runoff. The proposed site will produce a peak flow of approximately <br />3.84-CFS and a total quantity of 0.68 acre-feet for a 100-year event. <br /> <br />b, Identify routes and receiving water bodies for runoff from the site; include major <br />downstream water bodies as well as the immediate receiving waters. Estimate <br />impact runoff on the quality of receiving waters. <br /> <br />The site will drain to the existing stormwater pond through the storm sewer system, <br />The storm water pond drains to an existing storm sewer located in Centre Pointe <br />Drive. Once in the sewer the water is carried north and then west to Ramsey County <br />Ditch #2. Ditch #2 transfers and discharges the water into Rice Creek. County <br />Ditch #2 has been designed to accept water from this area. The development of this <br />site will not adversely affect the existing storm drainage system, <br /> <br />18. Water quality: wastewaters <br />a, Describe sources, composition and quantities of all sanitary, municipal and <br />industrial wastewater produced or treated at the site. <br /> <br />This site is proposed as a typical office building. This use produces normal domestic <br />sewage. <br /> <br />b. Describe waste treatment methods or pollution prevention efforts and give estimates <br />of composition after treatment, Identify receiving waters, including major <br />downstream water bodies, and estimate the discharge impact on the quality of <br />receiving waters. Jjthe project involves on-site sewage systems, discuss the <br />suitability of site conditions for such systems. <br /> <br />No onsite waste treatments are expected with these proposed uses, <br /> <br />c. Jj wastes will be discharged into a publicly owned treatment facility, identify the <br />facility, describe any pretreatment provisions and discuss the facility's ability to <br />handle the volume and composition of wastes, identifying any improvements <br />necessary. <br /> <br />Sanitary sewer will be handled by the existing City of Roseville system. Typical <br />wastewater flow rates from general office uses are 274 gallons per 2,900 square feet <br />per day. Total flow rate for the Centre Pointe Solutions site would be approximately <br />2,031 gallons/day. Total flow rate for Centre Pointe Development will be 77,381 <br />GPD. Existing 8" and/or 10" sanitary sewers exist in Centre Pointe Drive, Lydia <br />Avenue and Cleveland Avenue, These gravity lines flow to a lift station located <br />about 600' north of Lydia Avenue, on the west side of Cleveland Avenue. This lift <br />station was upgraded in 1987 to handle all flows from the Centre Pointe <br />development. The City has recently completed an analysis of the sanitary sewer lift <br />station and will be making improvements to accommodate increased effluent from <br />the Centre Pointe Business Park. Improvements will be completed in 2001, The <br />sewer lines are centrally located and will collect efficiently from the site. All of the <br />sewer lines ultimately reach the trunk line in lona Lane, then proceed onto the Metro <br />Treatment Plant in St. Paul. <br /> <br />Environmental Assessment Worksheet <br /> <br />Centre Pointe Business Park <br /> <br />Page 14 of 29 <br />