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(. ~. <br />j' ~ 6Cl I <br />CDMG Permit No. M-99-003 <br />Pag¢ 1 <br />CERTIFICATION <br />.4 UTHORIZATION TO DISCHARGE UNDER THE <br />CDPS INDUSTRIAL GENERAL PERMIT <br />FOR SAND ANb GRAVEL MINING AND PROCESSING GENERAL PERMIT <br />Category 07, Sub-category IA -General Permits, Sand and Gravel -Process Water & Stormwater <br />SIC Cade I442, Sand and gravel mining, washing, crushing screening and stockpiling. <br />Current fee $321/year (effective July 1, 1003) <br />This permit specifically authorizes: <br />with the facih'ry contact of <br />Lafarge West, Inc. <br />Todd Ohlheiser, Vice President <br />1590 W. 12th Avenue <br />Denver, CO 80204 <br />303.557.4118 Fax: 303.657.4339 <br />Phillip Courtney - 303.657.411 B <br />to discharge from facUifies identified as the Duckworth Pu Project, located in Secrion I6, T2N, R68W,• Weld County, as shown in <br />Figure 1 of the permit, from outfalls 001-002, as shown in Figure 2 of the permit and further identified and described in the following <br />table. <br />Stv ~Ouf~afl"~ <br />001 ° - es`ar"°'/io" ~:an tTrea`[iit'e . „, <br />Discharge from settling basin prior to entering Idaho Creek t. ,""aP' w Rate` <br />Avg. =1 MGD <br />002 Discharge from settling basin prior to entering Lighthouse Cove pond. Avg. =1 MGD <br />The discharges are to Idaho Creek and Lighthouse Cove Pond, Segment II of the Boulder Creek Sub-basin, South Platte River Basin, <br />found in the Class~carions and Numeric Standards for the South Platte River Basin (S CCR 1002-38), as amended January 3Q 2002. <br />Segment 11 has been designated Use Protected and classified for the following uses: Recreation, Class la; Aquafic Life, Class 1 <br />(R'arm); Agriculture; Water Supply. <br />Antidegradation review does not apply to this permit because the receiving water is designated as Use Protected. <br />Salinity (TDS) monitoring of the discharge will not be required. <br />Phosphorus monitoring of the discharge will not be required. <br />Effluent limitations in Part IB.2.a. of the permit and monitoring requiremenu in I.B.3. of the permit apply to this facility's process <br />water discharges. <br />At the h'me ojapplication, the permittee certified that they had developed and implemented a Stormwater Management Plan (SWMP) for <br />this facility. As a condik'on of this permit a copy of the SWMP must be provided to the Division upon request. <br />The permittee is encouraged to read the general rationale for an understanding of how this permit was developed and read the permit to <br />see what requirements exist In the permit, effluent limitations and monitoring/reporting requirements are specified in Paris LB. and <br />I C; special notificationrequirements for effluent violations are addressed in Part II.A. <br />All correspondence relative to this facility should reference the specific facllity number, COG-500466. <br />Effective August 25, 2003 Expires SEPTEMBER 30, 2007 <br />John K Nieland <br />August 25, 200.: <br />