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<br />t <br /> <br />19. <br /> <br />'1 <br />j <br /> <br />J <br /> <br />) <br />I <br />J <br /> <br />--~-='.~ -':"~I.'.""""'-':"-'.'-.--- ....;...~;;_.......-. .............._-,<.. <br /> <br />-";~~'..."'" ;~:-;':J"'-"~" <br /> <br />Water Quality - Waste Waters: <br />a. Describe sources, quantities, and composition (except for normal <br />domestic sewage) of all sanitary and industrial wastewater produced <br />or treated at the site. <br /> <br />This site is proposed as a total integrated corporate campus. This would <br />include office uses and a cafeteria. These uses produce normal domestic <br />sewage. <br /> <br />b. Describe any waste treatment methods to be used and give estimates <br />of composition after treatment, or if the project involves on-site <br />sewage systems, discuss the suitability of the site conditions for such <br />systems. Identify receiving waters (including ground water) and <br />estimate the impact of the discharge on the quality of the receiving <br />waters. (If the Funoffmay affect a lake consult "EA W Guidelines" <br />about whether a nutrient budget analysis is needed.) <br /> <br />No onsite waste treatments are expected with these proposed uses. <br /> <br />c. <br /> <br />If wastes will be discharged into a sewer system or pretreatment <br />system, identify the system and discuss the ability of the system to <br />accept the volume and composition of the wastes. Identify any <br />improvements, which will be necessary. <br /> <br />Sanitary sewer will be handled by the existing City of Roseville system. <br />Typical wastewater flow rates from general office uses are 274 gallons per <br />2,900 square feet per day. Total flow rate for the site would be <br />approximately 38,400 gallons/day. Existing 8" and/or 10" sanitary sewers <br />exist in Centre Pointe Drive, Lydia Avenue and Cleveland Avenue. These <br />gravity lines flow to a lift station located about 600' north of Lydia <br />A venue, on the west side of Cleveland Avenue. This lift station was <br />upgraded in 1987 to handle all flows from the Centre Pointe development. <br />The sewer lines are centrally located and will collect efficiently from the <br />site. The City of Roseville is studying the sewer shed to determine if <br />improvements to the existing downstream lift station are necessary. All of <br />the sewer lines ultimately reach the trunk line in Iona Lane, then proceed <br />onto the Metro Treatment Plant in St. Paul. <br /> <br />Page 18 <br />