Laserfiche WebLink
76-301 <br />Johnson 6 Peterson, Inc. <br />-2- August 16, 1976 <br />Mineral soils encountered in the borings were classified <br />in accordance with the Unified Soils Classification System. <br />A copy of that chart is attached. Representative samples of <br />the soils brought to the surface by the auger will be retained <br />in this office for a period of 60 days to be available for <br />examination. <br />Percolation tests were run in 6-inch diameter holes, drilled <br />to a depth of 36 inches, in accordance: with the procedures <br />normally used on lots that will be developed residentially. <br />In accordance with standard procedures, the holes were <br />permitted to soak overnight before conducting the tests. <br />Each of the borings was probed immediately after completion <br />to check for the presence of groundwater. <br />Results: <br />The Log of Soils encountered in the borings and the water <br />level observations are shown on the attached Log of Boring - <br />sheets. <br />Boring B-1 encountered brown, silty sand overlying slightly <br />silty sands to the respective termination depth of 18h feet. <br />Borings B-3 and B-4 typically encountered a sandy clay to a <br />clayey sand overlying a stratum of slightly silty sand to <br />silty sand at or near the termination depth of the borings. <br />$Arinag $-2 and�B-S through B-8 all encountered a dark brown <br />to black silty sand to depths on the order of 2 to 6 inches <br />and then encountered strata of verying thickness and depths <br />of sandy clay and silty clayey sand glacial till <br />termination depth of each of these borings. black sandy <br />depth o o:ing 8-7. <br />water was not encountered in borings B-S and B-6. a er was <br />in B-2 <br />and B-4, 12'f feet in B-3, 9h feet in B-7 and 17h feet in B- <br />8. A fairly large swampy area and Lake Minnetonka are <br />:ocated at the southwest edge of the property. The contour <br />elevation of the edge of this swamp to be r6ughly 9301. It <br />then appears from this information that the groundwater <br />table over the area under investigation would be above <br />elevation 930. In boring B-1, water was encountered at an <br />elevation of 94S. In boring B-4, water was encountered at <br />elevation 934.5. There i-s considerable variation between <br />these water level readings. Because of the cohesive nature <br />Of the soils encountered, considerable time is required it <br />order for the groundwater to stablize in the borings. It <br />