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MINNESOTA DEPARTMENT OF HEALTH Division of Environmental Health REPORT ON PLANS Plans and specifications on sewage treatment Spring Hill Golf Club, Maintenance Facility, Orono, Hennepin County, Minnesota, Plan No. 981959 OWNERSHIP: SUBMITTER(S): E.W. Day Plumbing & Heating, 520 Brimhall Avenue, P.O. Box 294, Long Lake, Minnesota 55356 Steel Structures, Inc., 821 Ninth Avenue Southeast, Minneapolis, Minnesota 55414-1310 Date Reviewed: March 10, i�98 Date Received: March 10, 1998, March 9, 1998 SCOPE: This review pertains to the design of the individual sewage treatment system intended to serve the referenced facility, and is based upon Minnesota Rules, Chapter 7080. The review is based upon the supposition that the data on which the design is based are correct, and that necessary legal authority has been obtained to construct the project. The responsibility for the design, including structural features and the efficiency of equipment must be taken by the project designer. Approval is contingent upon satisfactory disposition of any requirements included in this report. Enclosed is a copy of the report and transmittal letter to be forwarded to the project owner. INSPECTIONS: The installation of the individual sewage treatment system must be inspected by a licensed sewage treatment system inspector or a qualified govemment employee. The installer must contact the city, township or county zoning official for an inspec6on. If an inspector is not available from one of these government offices, than a privately licensed inspector must be contacted for the inspection. Preliminary Treatment - Two 1,000-gallon septic tanks and one 1,500-gallon lift station tank. A 1,500-gaflon holding tank will receive the flammable waste trap discharge. Final Treatment - 270 square feet of drainfield, mound construction (the rock bed is 27 feet long by 10 feet wide). Other Information: This system is designed to senre a maintenance building with 20 employees. Maximum Daily Flow Rate -400 gallons per day. Average Daily Flow Rate - 300 gaiions per day. Soil Percolation Rate - 3.4 minutes per inch. Depth to Restricting Layer- 30 inches to mottled soil. REQUIREMENT(S): 1. The on-site sewage treatment system must be constructed in accordance with Minnesota Rules, Chapter 7080. 2. A water meter must be provided on the water service line to the building to measure the water flow to the sewage treatment system (see Minnesota Rules, part 7080.0125, subpart 4). The water use should be monitored and written records kept. If the average daily water use ever exceeds 300 gallons per day, then additional septic tank capacity and/or drainfield area must be provided. 3. A durable nonwoven geotextile fabric cover must be used to cover the rock layer. The cover must permit passage of water without allowing the passage of overlying soil material.