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1 PLAN CERTIFICATION <br /> Facility Name: Three Bells Pit (Facility#COG-500131) <br /> Facility Type: Construction Sand&Gravel (SIC: 1442 NAICS: 212321) <br /> NPDES General Permit Number: COG-500000 <br /> Date that initial operation began: Spring 1998 <br /> Facility Address: 6428 E.Larimer County Rd 32,Fort Collins,Colorado <br /> Emergency Contact: Walt Wright <br /> Phone: 303-406-8593 <br /> Operation Schedule: 12 hours per day,6 days per week <br /> This stormwater management plan(SWMP)was prepared in accordance with good engineering, <br /> hydrologic, and pollution control practices. This SWMP has been prepared and implemented at the <br /> Martin Marietta Materials,Inc.(Martin Marietta)facilities located at 6428 E. Larimer County Rd 32,Fort <br /> Collins,Colorado, 80525. <br /> In compliance with the provisions of the Colorado Water Quality Control Act(25-8-101 et seq.,CRS, <br /> 1973 as amended), facilities engaged in mining and processing sand and gravel and other nonmetallic <br /> minerals(except fuel)are authorized to discharge surface runoff and process water from authorized <br /> locations throughout the State of Colorado to specified surface waters of the State. Such discharges shall <br /> accord with conditions of the Colorado Discharge Permit System General Permit COG-500000. Martin <br /> Marietta is aware that implementation of the provisions in this SWMP is required under the condition of <br /> the permit. <br /> I certify under penalty of law that this document and all attachments were prepared under my direction or <br /> supervision in accordance with a system designed to assure that qualified personnel properly gather and <br /> evaluate the information submitted. Based on my inquiry of the person or persons who manage the <br /> system,or those persons directly responsible for gathering the information,the information submitted is, <br /> to the best of my knowledge and belief,true,accurate,and complete. I am aware that there are significant <br /> penalties for submitting false information,including the possibility of fine and imprisonment for <br /> knowledge of violations without disclosure of these. <br /> David Hagerman(Vice President/General Manager) <br /> Signature Date <br /> Three Bells Pit Stormwater Management Plan I 12,2013 <br />