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1 <br />-is- <br />Based on the subsoil conditions and proposed construction, ce <br />' recommend the use of spread footings placed on the natural moist clays <br />below all topsoil. The footings may be designed for a maximum bearing <br />pressure of 3,000 psf. Under this pressure, we estimate settlements <br />to be on the order of 1 inch. Some additional differential ~rovement <br />should be anticipated if subsoils were to become wet. Continuous <br />foundation walls should be reinforced top and bottom to span an <br />unsupported length of at least lU feet. Any buried structures should <br />' be designed to resist an equivalent lateral earth pressure of 45 psf <br />per for the depth. This assumes a compacted backfill sloped away from <br />the structure and r» buildup of hydrostatic pressures. Exterior <br />foundations should be placed below frost depth. If considerable site <br />filling is required to achieve foundation bearing level, the fill <br />' should consist of nonexpansive, granular material compacted to at <br />least 1008 of ASTM D-698 dry density. <br />1 <br />' WATER STORAGE TANK <br />We understand the tank site has been rtoved downslope of the <br /> original location presently indicated as the powder magazine. <br /> Subsoils encountered at this location consisted of approximately 19 <br /> feet of stiff to very stiff clays interbedded with bedrock material <br /> overlying hard to very hard claystone/sandstone bedrock. At this <br />' location s <br />laced on the natural soils desi <br />ned for a <br />read footin <br />s <br /> g <br />p <br />g <br />p <br /> maximum bearing pressure of 4,000 psf or a graded pad designed for <br /> uniform bearing of the tank could be utilized for support. We <br /> recommend that additional exploratory drilling be accortq~lished at the <br />1 <br />1 <br />