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<br />• and disposed of through a closed system perrnitting no discharge to State waters. <br /> As depicted in Exhibit 53, there o-+ill be an "air level" above the top <br />1 of the retort that brill be separated from the retort by a sill pillar approxi- <br /> mately 50 feet thick. The sill pillar includes the Four Senators strata, vrhich <br />' are quite inrper•n;eable. After retorting, the air level will 6e sealed ~,+here <br /> necessary to serve as a water collection gallery. The drifts leading from <br />' the air level slope so that any water accumulating in the galled o-+ill flow <br />' by gravity to the outcrop or mine o-rater su.nps and thus will not encounter the <br /> retort. <br /> If there were no other mine rvor•kinys, it r•+ould be theoretically <br /> possible for ~;ra~zr tc enter- a retort through a side 5Jd11. NO'.•!e`/2r, any water <br /> <br />' which otherr+ise might enter the retort from the side will be intercepted by <br /> a series of drifts, raises, inclines and other workings and drained a~,vay from <br /> the retort. Thus, mine water will not contact spent shale after the retort <br />' experiment is concluded and thz retort is abandoned. <br /> As discussed above, retort ~•rater is handled in a closed system during <br />' operations and is not allowed to enter State waters. After retorting is <br /> completed, any water encountered in a retort. (there should be none because of <br /> the drainage facilities previously described) will be collected in a lined sump <br /> and kept isolated or treated unless and until it is demonstrated that the retort <br /> water contains no harmful substances. <br /> <br /> In summary, two approaches are planned in order to protect State waters. <br />' During retorting, o-rater produced in the retort will be collected, kept separate <br /> from mine r•+ater, and used to make steam. It will not be released except in accord- <br />' l <br /> ante with the terms of an applicah <br />e permit. After retorting, mine water will <br /> he intercepted in the air level above the retort and by mine workings around the <br /> retort and will flow by gravity down the mine drifts to the outcrop without cominy <br /> in contact with retorted shale. <br />1 <br /> -5_ <br />