2011-04-29_PERMIT FILE - M2011001 (21)

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cur nc.-wwtu r ax : ouo rdzus?ju Jan 10 2011 11:33 P.03 ether Go diflons Permit Number COG-500000 Facility NumbcrCO"01527 P.Ve I a Che'r?f_ c__u1s The permittee did not specify any chemicals for use in waters that may be discharged. On this basis, no chemica this permit Prior to use of any applicable chemical, the per Is are approved under rmittee'must submit arequest for approval which includes the most current result its Material Safety discharge Data of pollSheetutaants not MSDS) for authorized chemical. Until approved, use of a chemical in waxers that may be discharged could orized under the permit. Anti de Antiidogradation review does not apply to this permit because the receiving; stream is designated as Use .Protected. Grou?.??ater Cgntaminatton If groundwater contamination is encountered, then the perminee is to contact the Division and, if appropriate, the owner of the eallection system receiving the discharge. Since the discharge of contaminated groundwater is not covered under this permit, the permittee shall immediately apply fora groundwater remediation certification, which will include appropriate requirezr?ents far additional discharge monitoring and on-site environmental response capabilities. Sam lie Sampling shall occur at a point after treatment, or after the impiementation of any Best Manaement treatment are not implemented, sampling shall occur where the discharge leaves control of the permittee Practices, prior toss e?riinngg the or receiving stream. Samples must be representative of what is entering the receiving stream- .MLT t I hl -7 d Re o ti Discharge Monitoring Re Pow (I)MR) must be submitted quarterly as long as the certification is in effect. The permitme shall provide the Division with any additional monitoring data on tho permitted discharge collected for entities other than the Division; This will be supplied to the Division within 48 hours of the receipt of the data by the permittee. This certification to discharge is effective long term: For termination of permit coverage, the perraittee must initiate this by send' a letter to the Division requesting the permit certification be terminated. wmeyrrPracrrces _8esrrl<1 »ag t .._.._.r._ -- The perrnittee shall implement and maintain Best Management Practices (BMP) for the prevention of erosion and the control of solid and liquid pollutants due to the discharge. BMPs include various options, such as: utodification of the pipe discharge structure to disperse flows; containment of water by hay bales or other comparable structures; the use of geocloth, filter fabric, or plastic sheeting for protection of containment structures; rip-rap; andlor any other approved methods. g o rer Ma a ement Plan See Part I.C. ofthe permit for stortnwater requirements. At the time of application, the permittee certified that they had developed and implemented a Stornawater Management. Plan ($W WT) for this facility. The permittee shall amend the SWNV v,},enover there is a change in design, construction, operation, or maintenance which has a significant effect on the potential for the discharge of pollutants to the wafers of the State, or if the S WMp proves to be ineffective in achieving the general objectives of controlling pollutants in stormwater discharges associated with mtutig Activity, A COPY of the SWMP must be kept on site and provided to the Division upon request. The General Permit for Sand and Gravel Mining and Processing Operations (and other notunetallic minerals exce t fuel is att The peimittee should review this permit for familiarity with all of the p ) ached. this certification. that cannot be answered by a review of the permit requirements. If the permittee has questions related to pernnit, the permit writer should be contacted. P it Writer Maura McGovern 303-692-3392 Modified December 15, 3010