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id and existing <br />jdivision <br />in the City; <br />1 subdivision <br />"ity of Orono <br />fi County, <br />rig <br />ckage <br />this <br />he <br />less <br />lent <br />id subdivision <br />i that event, <br />‘or subdivision <br />-feiyor <br />I <br />0 <br />i <br />"•t <br />T'i <br />Wi04-*/' i' , ,« /fiL <br />siGERALD M. SUNDE, Consulting Engineer mm « s^; <br />10524 ZION AVENUE SOUTH • MINNEAPOLIS. MN 55437 • PHONE (612) 8B1-3344 <br />August 22, 1977 <br />Mr. Engner Johnson <br />360 North Arm Lane <br />Mound, Minnesota 55364 <br />Dear Mr. Johnson: <br />Re; Soil Boring and Percolation Tests <br />. Johnson Property on North Arm Lane <br />Orono, Minnesota <br />As you requested, a soil boring and percolation tests have been <br />taken to assist in evaluating soil types, soil absorptivity, and ground- <br />water conditions for the design of an individual sewer system on the <br />above property. <br />The boring and percolation test locations are shown on the attached <br />sheet and are at locations discussed on August 20, 1977. Surface elev­ <br />ations are referenced to the ground elevation at the east corner of the <br />proposed house (assumed as 100.0). <br />Investigative Methods <br />The soil boring was taken on August 21, by 1\ inch hand auger <br />to a depth of 8 feet. Soils were classified in accordance with the <br />U.S. Bureau of Chemistry and Soils classification system. The boring <br />was probed at completion and two hours later for the presence of <br />groundwater. <br />Percolation tests were run in 6 inch diameter holes in accordance <br />vcith the procedures recommended by the Minnesota Department of Health. <br />In accordance with standard procedures, the holes were allowed to <br />soak overnite. <br />Results <br />The log of soils encountered in the boring is shown on the attached <br />soil boring log sheet. Groundwater was not encountered in the boring. <br />Percolation tests indicated the following soil absorptivities in <br />minutes per inch (mpi): <br />‘ rvr >■ <br />• ■; <br />■ '^1 <br />h <br />it <br />i ’