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HomeMy WebLinkAboutC010.0.11 - Potential PollutantsPage 11 Section B 1. Description of the potential pollutant generating sources and pollutants, including all potential non-stormwater discharges The primary potential pollutant sources associated with the proposed bridge replacement and roadway construction are sediment associated with disturbed soil, leaking construction equipment, fuel spills during refueling operations, garbage/litter, and concrete from truck washouts. The concrete will be designed by the contractor in accordance with the Indiana Stormwater Quality Manual Section 710.03. The contractor will install appropriate erosion and sediment control measures to prevent sediment from migrating off-site. Leaking equipment, refueling spills, and garbage/litter issues will be prevented by implementing an effective material handling and spill prevention plan. 2. Stable Construction Entrance Locations and Specifications There will be one stable construction entrance utilized to provide temporary access during project construction. The stable construction entrance will be located between Station 19+00 and 22+00 Line "PR- A-3. The stable construction entrance will be no more than 30 feet in width. The stable construction entrance will be installed per INDOT Standard Drawing E 205-TECP-12 (Attachment E). 3. Specifications for temporary and permanent stabilization Temporary pipe inlet protection will be used for the inlets of existing and proposed pipes within the project limits. See erosion control details in the construction plan set (Appendix A) and INDOT Specifications and Standard Drawings (Appendix E). 4. Sediment Control Measures for Concentrated Flow Areas Concentrated flow is anticipated at the culvert under the parking lot approach, Station 10+50 “PR-A-3”, Station 15+0 “PR-A-3, 15+15 “PR-A-3”, 17+87 “PR-A-3”, and Station 18+0 “PR-A-3”. Temporary Pipe inlet protection will be installed in the areas of concentrated rated flow. A temporary silt fence and filter sock installed around the perimeter of the project area will ensure sediment stays within the project area. The locations of these measures are shown in the erosion control plan sheets (Attachment A). The temporary filter sock, temporary pipe inlet protection and temporary silt fence will be installed and maintained in accordance with Section 205 of the 2022 Standard Specifications and the INDOT standard drawings (Attachment E). 5. Sediment Control Measures for Sheet Flow Areas Prior to any grading and/or excavation, the contractor will install a temporary silt fence along the perimeter of the construction limits. Filter sock will be placed along the perimeter in the vicinity White River and Bluewoods Creek.