Long-Term Performance and Life-Cycle Costs of Stormwater Best Management Practices (2014) / Chapter Skim
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8C H a P T E r 1 1.1 Statement of Project Need and Objectives 1.1.1 Statement of Need Departments of transportation (DOTs) are faced with increasing regulatory standards and environmental challenges that mandate better stormwater quality management outcomes, often with limited funding.
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9 For treatment BMPs, this guidance provides an evaluation tool for assisting in their selection and determining whole life costs of treatment, including the following information: • BMP performance metrics; • Comparative service life and long-term BMP effectiveness for enhancing water quality for typical highway runoff constituents; • Life-cycle costs based on capital investment, maintenance, and operational expense data; and • Constituent removal performance. The companion tool to this document is provided on the accompanying CD-ROM in a spreadsheet format that facilitates the comparison of treatment BMPs by the practitioner.
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10 the U.S. Environmental Protection Agency (U.S.
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11 on variables that the user controls, such as the speed of the sweeper for roadway sweeping activities. The information in this report will assist the practitioner in improving the performance of nonstructural BMPs through more targeted implementation.
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12 3. NCHRP Project 25-42, "Bridge Stormwater Runoff Analysis and Treatment Options," is an applied research project that provides guidance for assessing potential water quality impacts and selecting BMPs for stormwater runoff from bridge decks and associated vehicle approaches.
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