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<br />:;-" ~"rr?J r'~ le "" -., <br />un:~.J7 1: j V t D AUG [J:5 f~a <br /> <br />e <br /> <br />_ / ~ ~ ~ ~ *' CONSULTING ENGINEERS <br />IIIfIIr"WI Maier Stewart & Associates Inc. <br /> <br />July 30, 1992 <br />File No: 230-116-30 <br /> <br />Mr. Pat Klaers <br />Administrator <br />City of Elk River <br />720 Dodge Avenue N. W. <br />Elk River, MN 55330 <br /> <br />RE: ONSITE SEWER SYSTEM REVIEW <br />WESTWOOD AREA <br /> <br />Dear Mr. Klaers: <br /> <br />As requested, we have reviewed the issue of inspecting onsite sewer systems relative to a request <br />for time extension to connect to City sewer facilities. In reviewing this issue, we have relied on a <br />portion of the 1991 edition of the Onsite Sewage Treatment Manual. We have attached a copy of <br />the portion of that manual dealing directly with determining if a system is conforming. <br /> <br />The process outlined in this document for determining nonconforming systems has 10 steps. <br />Basically, a system is reviewed against each step in order. If the process reaches step 10, the <br />system is conforming. We believe this provides a reasonable process by which to evaluate systems <br />for a hookup time extension. <br /> <br />e <br /> <br />A brief summary of the process is as follows: <br /> <br />STEP 1 <br /> <br />STEP 2 <br />STEP 3 <br /> <br />STEP 4 <br /> <br />STEP 5 <br /> <br />e <br /> <br />If no system is present, or a system is shared by more than one property, it is <br />nonconforming. <br /> <br />A cesspool, dry well or seepage pit is determined to be nonconforming. <br /> <br />Any system that discharges directly to a lake, surface or tile line is immediately <br />determined to be nonconforming. <br /> <br />If water table is less than 3 feet below the lowest point in the on site system, the <br />system is determined to be nonconforming. This is because adequate treatment is <br />not being maintained before reaching the water table and ultimately the lake. This <br />will require a soil boring to determine this information. <br /> <br />If the native soil has a percolation rate of greater than 5 minutes per inch there <br />could be a problem with treatment quality. Given the short duration of extension <br />period (2 years) this issue should not be used to determine conformance. <br /> <br />1959 SLOAN PLACE, SUITE 200, ST. PAUL, MINNESOTA 55117 612-774-6021 <br />9800 SHELARD PARKWAY, SUITE 102, MINNEAPOLIS, MINNESOTA 55441 612-546-0432 · Equal Opportunity Employer <br />