04-28-1997 Council Packet - Laserfiche WebLink

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S-P TESTING, INC.Steven B. Schirmers • MPCA Cert.No. 627 951 Katydid Lane NE • St. Michael, MN 65376 • (612) 497-3566 FAX (612) 497-5011 State License #394 Revised March 18,1997 October 28,1996 CITY OF ORONO George Adams 600 Big island Tom Robb 570 Big Island Jim Figger 580 Big Island Orono, Henn. Co., MN JudESO^B mar. 2 o; 199Tj jt ^ A site evaluation was completed on these properties for the existing on-site sewage treatment systems supporting the existing cabins. The existing systems are classified as failing due to not meeting the 3* separation from the saturated soil (mottled soil) or lack of system. The existing tanks are old, either metal or block type and will need to be abandoned, pumped and filled with soil. A new system will need to be installed. This on-site sewage treatment cluster system is designed for a Type 3, 3 bedroom 218 gal/day each cabin totaling 654 gal/day, in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. An easement agreement will be required by the city. The agreement will require a maintenance schedule for maintaining the tanks, and shared electrical costs, etc. A water meter v/ill need to be installed in each cabin to monitor the dally water use and to be recorded with the property. The system will be 5' from the property line and up to the road easement, this will need approval from the city. Approval will also be needed for a tank to be 5' from the Robb cabin to stay out of a low area. The soils on this site are SCS soils mapped - HbC - Hayden loam. The seasonally saturated soils were located at 5'10". The bottom of the treatment area must be located at least 3' above the seasonally saturated soils. A standard gravelless 10" diameter trench system may be installed. The soils at a depth of 30" have a percolation rate averaging 10.4 mpi. 1