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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />.1 <br /> <br />Transport Tire, Inc. <br /> <br />-7- <br /> <br />March 1, 1983 <br /> <br />be proportioned for a net allowable soil bearing pressure of 3000 <br /> <br />pounds per square foot The net allowable soil bearing pressure <br /> <br />refers to that pressure which may be transmitted to the <br /> <br />foundation soils in excess of the pressure due to the final <br /> <br />minimum depth of overburden. For this alternative, it is <br /> <br />important to incorporate a perimeter drainage system around the <br /> <br />building to prevent moisture problems due to surface runoff if <br /> <br />the building is lower than the ground surface immediately <br /> <br />adjacent to the building. Pavement and surface areas around the <br /> <br />building should be sloped away from the building. <br /> <br />Alternative 2 - If the building is built at or near existing <br /> <br />elevation, approximately elevation +904, excavate approximately 9 <br /> <br />to 10 ft through existing fill so that the footings rest on the <br /> <br />natural medium dense fine sand and silt with an N value equal to <br /> <br />approximtely 13 blows per foot. As before, a net allowable soil <br /> <br />bearing pressure of 3000 pounds per square foot may be used to <br />proportion the spread footings. <br /> <br />Alternative 3 - Remove the existing fill to the natural medium <br /> <br />dense fine sand and silt with an N-value equal to 13 blows per <br /> <br /> <br />foot at approximately +895 at proposed foundation location. <br /> <br />Replace the fill with either the existing on-site non-organic <br /> <br /> <br />fill or a select granular fill. A recommended gradation for <br /> <br /> <br />select granular backfill under foundations is enclosed in the <br /> <br /> <br />Appendix of this report. <br /> <br />STS Consultants, Ltd. <br />