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77-423 <br />Georgc Jackson & Assoc. -4 - 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 />developrent and when drainfield locations are establ=shed, <br />it is suggested that a more thorough check of soil *ptivity <br />rates be conducted. <br />Uf necessity, the area of the power auger borings and perco- <br />lation tests in relation to the areaof 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 />113 4UN ENGINEERI G TESTING, INC. <br />Dennis M. Rietschel <br />Engineering Ass*stani <br />C. G. Krusc, P.E. <br />Tice President - l:nl;in�eri►to <br />DAllt/CGh: skf <br />1 • Ir ,il • 1',I . •nt ,..1 and • 'pl..•'1­4311 r11 ­eM' A.. f." 11.•• —'•y..rn .. ar . • "."a, . ...•. 1.•1• .• 1.1. .• .. • . l ...• Il. r.ifr..1 p•11... .. <br />w. •n l...�. • l r .. fit .1-11 1116 .1\\..inr .11 1-111.111.t1...1, 1• •111, .r1 •.fir P,••trl•\ r1 .J,lr V•' •l ". 1 r :.Irril <br />BRAUR" <br />ENGINEERING TESTING <br />