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• <br /> RE: Septic system design and <br /> percolations tests for: <br /> 4520 Watertown Rd <br /> Orono MN <br /> Hennepin County <br /> We were retained by Mr. Miller to evaluate this site for suitability of an individual sanitary <br /> sewage treatment system to handle the sewage flow generated by water-use appliances within a <br /> single family dwelling. <br /> PROCEDURE <br /> A total of six (6) soil percolation tests were performed on May 16, 1995 in areas to the northeast <br /> of the proposed house. Three additional percolation tests were performed on November 10, <br /> 1995 to the west of the proposed house. <br /> In addition , six(6) soil boring's were drilled with a 2" i.d.x 3 1/4" o.d. Hand auger to check for <br /> the position of the ground water table and to identify the underlying soil types. Location of tests <br /> and boring's are shown on the site plan. Three additional sil borings were drilled on November <br /> 12, 1995. <br /> The percolation tests were performed in accordance with the provisions of"Minnesota Pollution <br /> Control Agency Rules and Standards Chapter 7080". The percolation test holes were drilled to a <br /> alternate mound depth of 12 inches with a 5" i.d. x 6" o.d. auger. Two inches of pea gravel were <br /> placed in the bottom of each hole to prevent scoring. Water was then added to the test holes and <br /> replenished as necessary,maintaining a saturation_,each hole was refilled to a 12-inch head of <br /> water over the bottom,and the percolation tests commciccd. <br /> Based on the soils this tot ills r in a mou.d 1x"Tip», to ll,,nxtlp nmvc ev.,.cte <br /> water. The site must be protected and roped on by The numetiwner or contractor. <br /> All equiptment must be kept off of the septic sites. lithe site is distr:ibcd we can and will <br /> not warranty future use. <br />