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--~.~ f~ <br />:~~t l1~UI%1L 101'1 ISO. <br />III IIIIIIIIIIIII III <br />• 1:'.iT]IIN 60 DA'iS OF PERMIT 1SSL'AIJC;,, THE PERI•i:ITTEE I•:L%ST <br />SUHbiIT CALCULAI^IONS SHOWING THE ki`OUIdT ^1HE GP.TED SP7LL- <br />WAYS ON THE NORT}IERN N0. 1 PORTAL/COAL STOCKPILE, REFUSE <br />DISPOSAL AREA, APJD RIENAU N0. 2 SEDIMENT PO]JDS MUST BE <br />OPENED TO ALLOI~J FOR AUTOMATIC DEl•!ATERING 4JITH AN AVERAGE <br />RETENTION TI[•7E OF 24 HOURS. <br />IN ADDITION, THE PERMITTEE PdUST SUBPII T DESIGNS AND SUPPORTING <br />CALCULATIONS FOR AN AUTOMATIC DEl•;P.TERING DEVICE WHICH <br />ALLCWS Atd AVERAGE RETENTION TIME OF 24 HOURS TO BE INSTALLED <br />IN THE IJORTHERl4 N0. 1 OFFICE AREP. SEDIMENT POND. THE <br />AUTOMATIC DE4IATERI1dG DEVICES AT THE NORTHERII N0. 1 <br />FACILITIES MUST BE INSTALLED BY FALL OF 19$5• <br />Northern Coal's ,°.ns1•:er: <br />The openi:~;'s required are detailed on the following <br />pages alo1~;~ r:ith the supporting calculations. <br />A small area exemption has been ar~plied for that will <br />eliminate i}~e oond below the nol•: vacated office site. <br />A copy or the exemption is included for reference. <br />• <br />• <br />