01-19-1993 Planning Packet - Laserfiche WebLink

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rr.- 1 ^ TO;Jeanne Mabusth, Building & Zoning Administrator From:Stephen Weckman, On-Site Systems Manager Date:January 0, 1993 Subject: #1795 LuAnn Walters, 3800 Wayzata Boulevard - Septic Review The applicant proposes to use the existing principal structure as a day care center including a kitchen area for up to 60 occupants on a daily basis. From the University of Minnesota and the Pollution Control Agency On-Site Sewage Treatment Manual, the septic system should be sized as a school or church with a cafeteria as it is the nearest comparison. Based on this criteria, the drainfield should be sized based on 16 gallons per day per unit and the septic tank should be sized based on 17 gallons per day per unit. As the intended daily occupation will total approximately 60 people including staff and children, the drainfield must be sized to accommodate to treat 960 gallons per day while the septic tanks must be sized based on 1,020 gallons per day. The existing septic system consists of three pre-cast concrete septic tanks and a mound-type drainfield installed in 1982. The system is code conforming, however, based on the projected waste load, the septic system is too small. The existing system would be sufficient for no more than 38 people on a daily basis. Therefore, soil testing and system design must be submitted to the City indicating suitable area for new or expanded septic system. Based on the above information, I would recommend approval of the conditional use permit provided that suitable soil testing and septic design information is submitted and approved by staff. Isv