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' <br /> � - - � , <br /> AET #20-01080 -Page 6 <br /> ' <br /> till clayey sands and sandy lean clays range in consistency from soft to very stiff. The silty sand ' <br /> till soils are loose to medium dense. <br /> � <br /> Water Level Measurements <br /> During our drilling operations, we probed the boreholes for the presence of ground water. The ' <br /> results of these measurements are noted on the Subsurface Boring Logs in The Appendix. A <br /> discussion of the water level measurement methods is presented in the SIJBSURFACE ' <br /> EXPLORATION section of this report. , <br /> Ground water was measured in Borings#2, #4, #5 and#6, at depths of about 18' to 21' below the I, <br /> surface. These water levels correspond to elevations of about 9261f� to 930. Because the soil <br /> profile at this site is interbedded layers of free draining sands and silty sands with slower draining , <br /> clays and clayey sands, it may takke several hours or days for a hydrosta.tic water level to develop <br /> and stabilize in an o�n borehole. This type of profile will also have perched water conditions that , <br /> develop in the sands and silty sands, above the slow draining clays and clayey sands, especially <br /> after periods of wet weather or snow melt. To more accurately determine the hydrostatic ground , <br /> water elevation, long-term monitoring with temporary piezometers is recommended. This was <br /> beyond our work scope. ' <br /> Ground water leveLs will flucwate. These fluctuations occur due to varying seasonal and yearly rainfall and �, <br /> snow melt, as well as other factors. <br /> RAT RY TESTING �:� <br /> LAB� <br /> es to aid in evaluatin their e ' rin ,' <br /> Laboratory tests were performed on several so�l sampl S ngu�ee g <br /> ; __ <br /> properties. Our testing included five hand penetrometer strength tests and seven water content ;' <br /> tests. The results of these tests appear on the S�bsurface Boring Logs opposite the samples on ; , <br /> which the tests were performed. <br />