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•.' yTESTIING, INC. <br />Steven B. Schirmers — MPCA Cert. No. 627 <br />Dick Lyman <br />715 North Ferndale Rd. <br />Orono, Henn. Co., MN <br />951 Katydid Lane NE • St. Michael, MN 55376 * (612) 497-35M <br />June 10, 1993 <br />rJtlN 18 ��g3 <br />This letter is in reguard with the high percolation rate at <br />TH#3 of 120.0 min/inch. A site investigation with the City <br />Inspector indicated possible compaction. Using a Soil Probe <br />it appeared the compacted soil is a 15' wide, 12" deep path <br />from possible equipment travel during landscaping prior to the <br />tests being completed (see site plan, the shaded area is the <br />compacted area). <br />Recommend in the area, the soil be turned over approx.18" deep <br />during soil preperation for placement of the mound. The Design <br />has a 40' down slope toe of the mound in this area for the <br />absorption area. <br />tev4n.'Schirmers <br />os <br />SBS/ds <br />