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Ma. Dime Delaney <br /> Mid-Continent Ramure a, Inc. <br /> July 23, 1996 <br /> Page 2 <br /> Gtnenj fin al Cmditiot:s <br /> To(:valuate the potential water-qualit�► irnpaCts aaaodul ed with historical activities at the <br /> Coal Basin Mine, ntrface-wawr quality was moaitoad at s WCW lams, including Outfall <br /> 001A, which iSzq1 entadve of the Overall water quality oddng the PrPPMY, and at the portal <br /> Of the twin haulage tunnt~ls- <br /> Gmund water =plea wtte collected to assess pow <br /> downMdient from each of the foilowing facilities: <br /> Main Yard (3 locadans)(Seep 1 through 3)9 <br /> Old Refuse Pile (1 location)(SeM 4), <br /> • Roc3c Tunnel Waste Pile and Coastrttction landfill (RT•I), and <br /> Sutey Pile (Sutzy Pile Underdrain SV•1, and Wsdng monitoring well <br /> for volatile osgaaic Compounds (VOCa), general <br /> The ground-water temples watt analyzed water espies cdb d from the <br /> inorganic Constituents, and dissolved metals. Those tba Sutey Pile, and to Rock <br /> three form= waste disposal arcs, namely the old tfuse pile, <br /> ?unttel waste pile, and ttte samples Collated downgrsdient from the Main Yard ware also <br /> analyzed for polychlorinated biphenYls (PCSs)• <br /> The analytical resolis for the stufacc-wg= and pound-*Va moeitoriag 101� and <br /> the soil UMVIN collated from the area of the famer un&W=d S=pcurb are summuized <br /> in the audwd tables (Tables 3 throw 9). <br /> In summary► no stP fisaat water,P&ty =pa= vote i,deat W through the U=tad <br /> that has been=rriod out Although these are minor diffetatas <br /> sampling and icy between samplun. g locadons, both surfa=, v w sad Va=d-water gwatity <br /> in water quality >radons of waadumu including <br /> throughout the area is gtaod• In this reg�. wales �� � <br /> dissolved metals are within the expected range• I= =c ads the &inking <br /> oieds the <br /> �p from the Rock Tunnel Waste Pik (RT-1); mesa a S� PiLe <br /> #1 and the discharge s#1 and#3 and in the discharge <br /> established drittidne water standard in Seep ==== of Mancos shale <br /> 'rheas exceedences are attributed to the wide-spread was <br /> underdraia. or retiree disposal a tr4ies pGt34 Ba>s�e <br /> in these area+ and not m coal procwing down t of ft T=k Shop and Main <br /> detected at a concentration of 1 µfill in a natural wMW ids net <br /> Yard. This ooncenntion is below the drin]dng <br />