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. . . S~P l"ESTING, INC. Steven B. Schirmers -MPCA Cert. No. 627 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 David Carlson Co. Pleasant view at Lake Minnetonka The Reserve & Lots 14, 15, 16 & 17 Big Island Orono, Henn. Co., MN . May 11, 1992 A Site Evaluation was completed on this property for On-Site Sewage Treatment. At present there are 2 existing cabins with out houses. This On-Site Sewage Treatment System is Designed for a Type 11, 2 bedroom for each cabin, 225 gal/day/cabin. Designed in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The soils on this site are scs soils ~apped -HbC -Hayden loam. A seasonally high water table was located at 22" t6 26", (mottled soil). Due to the seasonally high water table, a Pressurized Mound System will need to be installed. The bottom of the rock bed must be located at least 3' above the seasonally high water table. Due to no further expansion area, the system is actually Designed for 540 gal/day which will allow a maximum water use of 270 gal/day ~ per cabin. Each cabin will need to use low water facilties, 1.5 gal. flush toilet, low flush shower head, water flow restrictions on all faucets, etc. A water meter will need to be installed in each cabin to monitor daily water use. If the water exceed 270 gal/day, the water use in that cabin will need to be further reduced. Due to the cabins being ~ithin 1.0' of the high water mark for Lake Minnetonka, the tanks will need to be installed at a higher elevation. Sewer ejector pumps with check valves will be needed at each cabin to lift the effluent to the septic tanks. The supply line to the septic tanks will need to be drained prior to the winter season. Recommend the septic tanks & pumping chamber be insulated to prevent freezing in the winter. A Legal Agreement will be needed on ownership, maintenance & water use, etc. prior to City approval. CONT'D