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77-423 <br />George Jackson 6 Assoc. -4- <br />Aii.;ust 31 , 1977 <br />type can be questionable when wet and should be more <br />thoroughly investigated at a later time. Although power <br />auger borings do not provide information relative to the <br />strength parameters of the various soil types encountered, <br />mineral soils of the types brought to the surface by the <br />auger generally are of sufficient strength to support single <br />family dwellings without detrimental settlement. The black <br />mineral soils encountered in the majority of the borings <br />near the surface are likely quite soft and would not provide <br />an adequate foundation. 'These soils will likely have to be <br />removed in their entirety from the building areas prior to <br />construction. <br />The acceptable rate for percolation tests is 60 mpi; there- <br />fore, all of the tests conducted indicate rates of a magnitude <br />which would be considered acceptable. At the time of lot <br />development arid when drain.field locations are established, <br />it is suggested that a more thorough check of soil absorptivity <br />rates be conducted. <br />Uf necessity, the area of the power auger borings and perco <br />lation tests in relation to the area of the subdivision and <br />the depth of the borings are limited. Suggestions and/or <br />recommendations of this report are opinions based on the <br />data obtained from the borings and percolation tests performed. <br />If we can be of further assistance in evaluating these data, <br />or in taking additional borings or percolation tests as the <br />development of the site progresses, kindly contact us at <br />your convenience. <br />Very truly yours, <br />` BMUN ENGINEERI TESTING, INC. <br />Dennis M. Rietschel <br />Engineering 4 <br />ant <br />C. G. Kruse, P.1:. <br />%'ice President - Engincerir!o <br />I)MII/CGK: skf <br />"- . u .1�1n p1 im• 1 IA., 1 ..1,j. ,1.-'0 n.,.*na .r r, , n. <br />'N• 11V\I .ul ..,1r..wNlWw. 4�... rn1 ....r . 1 • �.nu w <br />• <br />�n1 . <br />H•.r•1� .1p 1p.,h.n%4+111 y �n1 .W .• y.t.1yN 1.4*10.••a .W 111-.Mn1 <br />BRAUn <br />ENGINEERING TESTING <br />