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S-P TESTING, INC.Steven B. Schirmers • MPCA Cert No. 627 <br />651 Katydid Lane NE • St. Michael. MN 65376 • (612) 467-3566 <br />FAX (612) 467-5011 <br />State License #394 <br />February 4.1999 <br />Edward Hamm <br />465 & 485 Orono Orchard Rd. So. <br />Orono, Henn. Co.. MN <br />This letter is in reoard with the on*site sewage treatment system design dated December <br />23.1696. The proposed design is for a 10 bedrooms total, 1500 gai/day and requires a <br />pressurized mound system to adequately treat septic effluent <br />In the fall of 1998,1 visited the site with Dean Yerigan Co. and found the site had been <br />traveled over with a skid loader by a tree removal company. The damage to the site is <br />unknown and difficult to test for. Percolation tests could be completed at 12~ below the <br />surface, but the possible compaction may have taken place in the first few inches, the <br />topsoil. The size of the system, average area 50* x 165* makes it very limited for <br />additional areas on the property to design a new system. One possible area Is south of <br />the driveway 6 northeast of the main house. Additional testing will be needed to identify <br />this site. Another option would be to connect to City sewer which may be available but <br />requires review and approval from the City of Orono. <br />This site has limited space for a pressurized mound system due to slopes greater than <br />6%, drainage, fill & excavated soil and the size of the area needed. <br />Steven B. Schirmers <br />1 <br />Z0 02.S6 ZI9 <br />i <br />Wd sc:se 66-Se-a3J