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COBURG SEWER EXTENSION EVALUATION: PRELIMINARY <br /> (INCOMPLETE) FIRST CUT AT ISSUES TO BE <br /> STUDIED/ADDRESSED BY THE ELECTED OFFICIALS <br /> Prepared by Susie Smith and Peter Ruffier <br /> i~ <br /> ISSUES RELATED TO THE ENVIRONMENTAL IMPACT OF CONNECTING <br /> COBURG TO MWMC RELATIVE TO OTHER OPTIONS AVAILABLE: <br /> Pipe across the River <br /> • Where? <br /> • How constructed? <br /> <br /> 1 • Natural resources, land use and water quality impacts " <br /> Centralization of Discharge (Single Outfall) vs Options with Potentially Less <br /> Negative Impact <br /> • Greater impact within existing MWMC mixing zone vs. dispersed impact <br /> • Concentration of temperature, ammonia, mercury, mass........etc <br /> • Are there other options for Coburg discharge that would be more beneficial <br /> (reconnection of hyporheic flows, exfiltration through gravels, constructed <br /> wetlands, etc) <br /> ISSUES RELATED TO MWMC'S CURRENT NPDES DISCHARGE PERMIT <br /> AND ASSOCIATED POLLUTANTS OF CONCERN: <br /> Coburg Responsibilities and Liabilities under the NPDES Permit Generally <br /> • Annual reporting <br /> • CMOM IGA <br /> • Collection System Operator certification <br /> • Share of liabilities <br /> • Accountability/enforcement <br /> Coburg Industrial Pretreatment Requirements <br /> • Compliance with MWMC Model Ordinance, <br /> • Local program implementation, including: development of local ordinance, code, <br /> program implementation, enforcement, monitoring, reporting, profile of current <br /> Coburg industries, MWMC administration oversight, etc. <br /> • Local limits review, modeling and allocation (involves technical review and <br /> public policy discussion of how to allocate remaining pollutant loads to Coburg <br /> vs. Eugene/Springfield for future industrial development) <br /> Page 1 <br /> _ <br /> <br />