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CITY of ORONO <br />mF <br />-■ %i <br />0 <br />f,., <br />Post Office Box G6®Crystal Bay, Minnesota 5532^<®Municipal Offices <br />On the North Shore of Lake Minnetonka <br />June 24/ 1982 <br />D.D. Ryerse <br />350 South Brown Road <br />Long Lake, MN 55356 <br />Dear Mr. Ryerse: <br />I met with Carl Widmer yesterday and again today to discuss the <br />various options for repairing your drainfield system. He noted that <br />his records show a 1200 square foot drainfield which was installed <br />in 1973. He also indicated that after probing the drainfield and <br />noting that the effluent level was above the distribution box cover, <br />the drainfield appears to be quite saturated and probably is being <br />fully used. I probed the field and concur with his findings. <br />The 1200 square foot drainfield was extra large compared to most <br />installed in 1973. However, it is in a bed configuration about 10' <br />in width rather than in single trenches of 2^5* to 3' width, which <br />would yield more sidewall area for absorption. Beds are normally <br />not installed today in Orono unless space is limited. <br />Our files give no indication that a percolation test was performed <br />when your house was built. I suspect a very slow percolation rate <br />may also be influencing the failure of your drainfield. The two <br />existing septic tanks are substandard in size by todays standards <br />(code changed in 1978) but appear to be functional. Their use can <br />be continued. <br />At this point it is my recommendation that you contact a site <br />evaluator (partial list enclosed) to locate a suitable site for <br />replacement/repair of your drainfield. The testing should include <br />at least one boring and two percolation tests in the proposed area. <br />When the testing is complete the site evaluator should design a system <br />based on the soil and site conditions encountered.4 <br />I am enclosing information on site evaluation and system design. <br />If you have any questions, please call me. It is imperative that <br />repairs be completed this construction season. <br />Sincerely, <br />Michael P. Gaffron <br />Septic System Inspector <br />Enclosures <br />BUIl-DINt;& /.OMNU - 473-7357 • <br />ASStSSINt; <br />ADMIMSTRAIION & I INANCi; - 473-7358 PI BLIC HORKS 473 7359 <br />> I mm