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COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Quality Control Division <br />Rationale -Page 2, Permit No. CO-0027!54 <br />G. Discharge Points: <br />Table II-1 -Discharge Points <br />Outfall WW Source/ <br />Type* 30.Day Avg/ <br />Daily Max <br />Flow, MGD 10.yr/24-hr <br />Event Val, <br />MG Pond Volume/ <br />Design <br />CapacUy, MG Receiving Water <br />001 SS/SR(PM) 0-16.8//6.8 17.0 44.3 Foidel Creek <br />002 SR 0-0.49/0.491 1.12 !.2 Foidel Creek <br />003 SR/SS 0-0.62/0.627 0.27 4.55 Foidel Creek <br />004 SR 0/0 0.35 0.61 Foidel Creek <br />005 MW/SR(PM) 0-4.48/4.48 2.2 9.8 Foidel Creek <br />006 SR 0-0.54/0.536 0.27 0.92 Foidel Creek <br />007 MW/SS/SR(PM 0-3.6/3.62 0.76 2.97 Foidel Creek <br />008 SR(PM) 0.1.6/1.62 7 / 10.35 Foidel Creek <br />009 SR/SS(PM) Q13.3/13.3 3.87 5.6 Middle Creek <br />020 MW 0.5/- NA NA Foidel Creek <br />MW means rnine water, SR means surfare runoff, SS means spoils spring, PM irrdirates drat some post inuring areas are served by <br />dris mrtfatt. <br />/ILFACILITY DESCRIPTION <br />A. /ndustry Description <br />Tvae of /ndrrstrv: The jaciliN is a coal mine. Previously, surface Wrens have been mined however mining of <br />surface areas is complete and these areas !rove been reclaimed and surface areas ore revege[aling. Underground <br />mines are still being worked. Current production can be 1,000,000 tons per ntor:rh with a maximum of <br />11,000, 000 tons per year produced and /0, 000, 000 tons per year shipped. <br />2. Sources to the Treatment System: Sources of wastewater are: surface runoff-both from active mining areas rind <br />post-mining areas, mine drainage pumped from the underground mine, rind spoils spring water (which may occur <br />in both active raining areas and post-mining areas). Tire con[ prep p[nnt may use spoils spring water or mine <br />water as leash writer, which may then be sent to the trennrtent system. <br />3. Chemicals Used: The permittee did not specify any clternicals for use in waters that Wray be discharged. <br />Chemicals are used in the prep plant, however these are very trn[ikely to be discharged. No clrernica[s are <br />specifically approved under t/tis permit. Prior to use ojarty cherrrical that has a likelihood ojbeing discharged, <br />1lre permittee must submit a request for approval which includes the most current Material Safety Data Sheet <br />(MSDS) for t{tot chemical. Also see Parr //.A.1. of the permit. <br />B. Wastewater Treatment Description <br />Tire permittee has several sedimentation ponds shat serve to clarify wastewater prior to discharge. Underground rnine <br />drainage may be prelirrrinarily settled in underground sumps prior to being pumped to the sedimentation ponds. Some <br />spoils spring flow is intercepted and flows into the sedimentation ponds also. <br />Pursuant to the authority of Anicle 9, Title 25, Rexulations,for the Certiftrntion o(Water Treatment Plant and <br />Wastewater Treatment Plant Operators. this facility may require a certified operator. The permittee s)tould contact <br />the Colorado Plant Operators Certification Board at (303) 692-3550 for further information. <br />IV.PERFORMANCE H/STORY <br />A. Monitoring Data <br />/. Discharge Monitorin,~Reports: Tables /V-1 through /V-9 sumnmrize the effluent data reported on the 24 monthly <br />Discharge Monitoring Reports (DMR's) for the Co[orndo Yarnpa Conl Company facility from August 1998 <br />through Jrrly 2000. When an outfa[[ did not discharge jar rill 24 monthly reporting periods, This is noted !rt 1lte <br />table's heading. The pennittee reported "no discharge"for outfalls 004 and 020 for the entire sunmrarized <br />period. <br />