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- 4- <br />DISCUSSION AND RECOMMENDATIONS • <br />We understand the processing will result in approximately 50,000 cubic <br />yards of materials to be disposed of on an annual basis. We anticipate that <br />materials will be trucked to the disposal area and dumped in small piles on <br />an irregular basis. The present anticipated type of processing will result <br />in essentially a dry waste material. We understand that the disposal site <br />must meet the requiremehts of several State and Federal agencies. Speci- . <br />fically, these requirements indicate the location must be such that it does <br />not adversely affect water quality, water flow or vegetation, create public <br />health hazards or cause instability in the disposal areas. The site of the <br />proposed disposal site is probably the best available area. It is located <br />on a relatively high site previously occupied by a gravel mining operation. <br />Water flow into the area will essentially be intercepted by diversion ditches • <br />and other surface facilities uphill of the site, and the disposal area will <br />be subject only to water from rainfall which would fall directly within the <br />disposal area. The foundation soils which exist within the disposal area <br />consist of a dense sequence of sandstones and shales which will be virtually <br />incompressible under the anticipated loads of embankments up to 50 feet in <br />fieight. The proposed waste embankment construction is in a naturally stable <br />g'rea and the additional loads imposed by the embankment will, in part, re- <br />place materials previously excavated by the gravel operation. To meet the <br />requirements of the various regulatory agencies, as well as to reduce construc- <br />tion and maintenance-costs to .a minimum, we recommend the following procedurE~. <br />1. The proposed disposal site should be stripped of all sand and <br />gravel down to the surface of the sedimentary bedrock. • <br />