2018-04-11_REVISION - M1974004 (3)

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CITY OF GOLDEN 1445 TENTH STREET GOLDEN,CO 80401 Stormwater Quality Permit 303-384-8188 # 17-20 (FAX)303-384-8161 Project: Martin Marietta HSMM Grading Permittee: Name: Luke Riemenschneider, Martin Marietta Materials Inc Address: 18401 W. Colfax Ave. Golden CO 80401 Phone: 303-271-9428 Authorized Agent: Name: Erin Kunkel Date Issued: September 11, 2017 Date Expires: September 11, 2018 The following conditions apply: 1. Permittee is automatically covered under the CDPS General Permit for Stormwater Associated with Construction Activity and must be aware of and comply with requirements outlined in Attachment A; 2. Permittee shall comply with Municipal Code Chapter 13.30; 3. Stormwater management practices shall meet the design criteria set forth in the most recent version of the City of Golden Stormwater Standards Manual; 4. A site representative shall routinely inspect the site perimeter, disturbed areas, material storage areas and erosion and sediment control measures to identify necessary repairs and maintenance; 5. Permittee shall perform maintenance on BMPs throughout construction to ensure effectiveness until final soil stabilization is achieved and approved by the City; 6. The SWMP must be regularly updated and reflect site conditions at all times; 7. Permittee may be required to install additional BMPs due to changed site conditions, BMP ineffectiveness or BMP failure; 8. Construction site access shall be routinely maintained to ensure that sediment is not tracked onto streets; 9. Clearing or stockpiling, except that necessary to establish sediment control devices, shall not begin until all applicable sediment control devices have been installed; 10. Soil stabilization shall be performed within 14 days of finish grade; 11. Permittee shall remove temporary BMPs upon final stabilization; 12. Storage of chemicals, petroleum and liquid or solid waste must be stored properly as to not contaminate stormwater; 13. Concrete wash water shall be handled properly as to not contaminate stormwater; 14. This permit does not authorize discharge of construction dewatering water to surface waters or the storm sewer system; 15. No chemicals are to be added to the discharge unless permission for the use of a specific chemical is granted by the Water Quality Control Division. Signature Block/Permit conditions • 1 understand that it is my obligation to ensure that control measures shall be installed and maintained throughout construction, until final stabilization/revegetation is achieved. • Should effective measures fail to be maintained,the City or its contractor may enter the property and provide necessary corrective me sures and bill me for the cost or the City may draw upon the security for reimbursement of its costs, plus 15 6t� /6L,// 7 Authorized Signature Date This permit is issued to the permittee for a specific operation. It cannot be reassigned,transferred or sold to a new uses,different premises or a new or changed operation by a new owner.