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;OLORADO DEPARTMF,NT OF PUBLIC HEALTH AND ENVIROMIIENT, Wattr Quaary Conno7 Divirian taaonafe -Page I. Permit No. COGSaQaOa RATIONALE SAND AND (TRAVEL PRODUCTIONOPERATlONS (AND OTHER NONMETALLIC MINERALS EXCEPT FUEL) GENERAL PERMIT IN COLORADO COLORADO DISCHARGE PERMIT NUMBER COG-500000 FOURTH RENEWAL CONTIN/S PAGE I. UPDATE 1 Il. STOtiMWATBR PROGRAM 1 IIL COVERAGE UNDER TH/S PERMIT 1 IV CERTIFICATION I V. TERMS AND CONDITIONS OFPERMTf 1 V/. REPORTING REQUIRF,MENIS ~ VII. PUBLICNOTICE CHANGES I. UPDATE Thrs is jor the renewal ofthegeneral sand and gravel permit fast issued on Octoberl8, 1982, with reissuanceson June /0,1987, August 31, /992, and August 31, 1997. The General Permit system for regulating sand and gravel production operattons has worked wel/for the State ojColorado. The following minor changes have been made to the permit and Rationale during renewal: A. Small MunicioaliNExemption: The Rationale discussion onrhestormwaterpermittingExemptionsfarSmal/Municipalities (Section IILB) has been changed to include the March 10, 1003 deadline for permit coverage for municipally owned industries. This did not involve any changer to the permit. B. Reaoolication: Authorization to discharge under this general permit will expire on September 30,1007. For certifications covering stormwater discharges only (i.e., the permiaee's individual certification does not indicate that Pan I.B of the permit must befollowed), the deadlinejor reapplication jor continued coverage underYltegeneral permit has been changed to ninety-days prior to permit espiradon, o~June 30,1007. The due date for perminees certified to discharge stormwater and process water will remain as 180 days before permit expiration, or March 31, 1007. C A paragraph was included in the introductory page explaining the right of anyparry to an adjudicatory hearing contesting the renewal ojthis general permit, as per the Colorado Discharge Permit Svstem Regulations. Regulation No. 61, (5 CCR 1001-61). Note that this does not provide for an adjudicatory hearing for a certifrcatton issued under this general permit. D. Imoacted Stream Se enu: For this general permit, any existing or new operation that discharges [o a segment that is listed on the Division's 3030 list of impacted stream segments may requre an individual permit The 3030 segments are segmentr in which water quality standards for one or more pollutants are exceeded. For most, ifnot all, ofthe operations that discharge under this permit, there are no monitoringdata to verifylhe espectatian that these discharges will not impact a listed segment Therefore, for those facilities that discharge process water to segments on the 303(d) list, rhepermittees will be required to perform a One-rime analysis upon Commencement ofducharge jor the listed parameters of concern to confirm that stream standardsjor these parameters are not exceeded in the discharge concentrations. Where the receiving water rs included on the state's 303(d) list, rota! maximum daily loads (TMDls) are being developed in accordance with the Division's schedule jor TMDL complefion. Once a TMDL has been established, if it is necessary to incorporate /imitations for a facility certified under this general permit which are based upon the outcomes of the TMDL or the results ofrhe one-time analysis, an individual permit may be written to regulate dischargesfrom ihrsjaciliry. Thefacility would continue to be covered under this general permit certification until the individual permit is issued. STORMWATER PROGRAM As required under the Clean Water Act amendmenu of1987, the Environmental Protection Agency (EPA) has established a framework jor regulatingmunicipalandindustrialstormwaterdischarges. ThisframeworkisundertheNationalPollutantDischargeElimination System (NPDES) program. The regulations (40 CFR !12.26) require speck types of indusbial facilities which discharge stormwater associated with industrial activity (industrial stormwater), to obtain coverage jor this discharge under an NPDES permit. Faciltries which discharge industrial stormwater either directly ro surface waters or indirectly, through municipal separatestorm sewers, must be covered by a permit.