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1 <br />- 19 - <br />new location to determine bearing conditions. Structure type, <br />' configuration and bearing elevation should be generally known for <br />final recommendation. <br />' WASTE WATER TREATMENT PLANT <br /> We understand the proposed treatment plant will be a pre- <br />, engineered type system. Subsoils encountered at the proposed plant <br /> site consist of a shallow depth of silty to clayey sand overlying <br />' medium to coarse alluvial material. A free water level was encoun- <br /> tered at depth 10 feet. Spread footings placed on the upper sands or <br /> d f <br />t <br />i <br />i <br />t <br />i <br />l <br />b <br />d <br />l <br />di <br /> or suppor <br />un <br />ng me <br />um to coarse r <br />ver run ma <br />er <br />a <br />can <br />e use <br />er <br />y <br /> of the structures. Allowable pressures may be taken as 2,000 psf on <br /> the upper sands and 5,000 psf cn the underlying granular soils. <br /> Settlements under these pressures should range to a maximum of 1 inch. <br /> Minimum footing width should be taken as 16 ind~es for walls and 2 <br /> feet for columns. Continuous foundation walls should be reinforced <br /> top and bottom to span an unsupported length of at least 10 feet. Any <br />' <br /> buried walls should be designed to resist an equivalent lateral earth <br />' pressure of 35 psf per foot of depth. This assumes a compacted and <br /> relatively free-draining granular backfill. On-site croarse granular <br /> soils should be suitable for use as backfill provided oversized evck <br /> is reiroved. Exterior footings should be placed below frost depth. <br /> <br />' ACCESS/HAULE~AD <br /> The roadway will extend from the lower rortheast portion of the <br />' site to the future coal refuse area above the site to the southeast. <br /> <br /> <br />