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. . .` i .. • <br />=P TESTtNG, INC. Steven B. Schirmem — MPCA Cert. No. 627 <br />951 Katydid Lane NE • St. Michael, MN 55376 * (612) 497-35M <br />October 11, 1993 <br />Taylor Residence <br />Bruce Schmidt & Associates <br />550 East Long Lake Rd. <br />Orono, Henn. Co., MN <br />This letter is in reguard with the Revised Design for the proposed <br />On -Site Sewage Treament System for this property. <br />The proposed sites were compacted from equipment travel. The <br />average percolation rates from the tests completed June 28, 1993 <br />was 10.6 min/inch. The tests completed September 25 & 30 range <br />from 7 to 480.0 min/inch. The proposed treatment area is compacted <br />approx. 101 & the future expansion area is compacted approx. 401. <br />when installing the primary site, the compacted area must be <br />turned over 180 deep (only compacted area). The holes from tree <br />removal must be filled with a loam soil, not sand. The future <br />expansion area (3 seperate rock beds 27.3' each) must be turned <br />over at the same time as the installation of the primary site. <br />Recommend to use a chisel plow 180 deep. <br />These sites no longer meet State & l ^al Code due to the <br />compacted soils. This Design must reviewed & approved <br />by the City Official. <br />Note : Septic effluent will to be delivered by a timer, 300ga: /day <br />per mound. Pumping chamber will also need a alternating relay <br />alternating each mound. <br />even B'Achi; e <br />�U <br />SBS/ds <br />