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CASCADE TESTING LABORATORY, INC. <br />TESTING fi INSPECTION/ErvGiNL'ERS/GEOIOGISTS <br />December 16, 1981 <br />Cert. No. 8112-13G <br />Paper Warehouse Corporation <br />Page 7 <br />1) Proper water control in the trench prior to placing the lean mix <br />concrete. <br />2) The trench should terminate on dense granular soils as noted in <br />our test pi� logs. <br />3) This lean mix concrete trench should be accurately aligned such <br />that the building footings will bear directly on. the lean mix <br />concrete and not partially on and partially off.. <br />4) All sloughed or water loosened soils should be �:emoved from the <br />trench prior to placin9 the lean mix .:oncrete. <br />All other footing areas not requiring the lean mix concrete trench <br />system, may bear directly on the dense glacial till soils. Footings <br />placed to bear on the dense glacial soils.or on the pro�erly con- <br />structed lean mix trench may be desi9ned to a maximum soil bearing <br />value of 9000 PSF. This value assumes the following: <br />1) All footings bear directly on undisturbed dense glacial soils or <br />on the lean mix trench. <br />2) All footings are placed to bear a minimum of eiqhteen (18) <br />inches below finished exterior adjacent grade. <br />3) All footings are nominally reinforced to resist stress. <br />Subslab Preparation • <br />Preparation of the subslab area should include the removal of all <br />� organic rich or root ladened soils, debris and fill soils down to <br />the weathered soil zone or to a minimum of twelve (12) inches below <br />l;� <br />