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The Contractor shall be responsible for keeping trenches and other areas free from water as <br /> required to permit continuous progress of, or to prevent damage to, its own work or the work of <br /> others. The Contractor's operations shall be conducted in such a manner as to prevent — <br /> sediment from reaching existing sewers, storm drains, and adjacent property. <br /> The Contractor shall cover exposed excavated areas and spoils piles when runoff from rain is or <br /> would be likely to cause turbidity to enter local waterways or the stormwater collection system. <br /> The Contractor shall suspend work in the rain if such work cannot be performed without causing <br /> turbid runoff. — <br /> Best Management Practices shall be implemented to control erosion during construction. <br /> Measures shall include: minimizing long, unbroken flow paths, using broad and flat drainage <br /> swales, routing off-site drainage around construction, using energy dissipaters and erosion <br /> control pads at the bottom of down drains, using berms at the top of slopes to control flows on <br /> the slopes, using sediment control basins in regulating flows released from the site, shoring of <br /> trench walls and excavation sides, cover, secure, and/or berm excavated area and spoils piles <br /> and employ other methods as necessary such as silt fences around storm drains of around <br /> construction sites, use of cut and cover construction method, and use of sedimentation basins. <br /> Water used for disinfection purposes or other water with a chlorine residual greater than 0.1 <br /> mg/L shall not be discharged to any water body or allowed to enter the City stormwater <br /> collection system. Remove all chlorine residual by adding dechlorinating chemicals. Obtain prior <br /> approval of City (or other agencies with jurisdiction over discharge) of chlorine removal system, <br /> controls, and procedures. <br /> The Contractor shall implement, year-round and throughout the duration of the project, control <br /> measures for sediment tracking, wind erosion, storm water management and waste <br /> management and disposal. Contractor shall prepare an erosion and sediment control plan for <br /> each area to be disturbed by the construction area including each open cut excavation, pipes, <br /> and appurtenances. <br /> Positive erosion and sediment control measures shall be implemented to minimize erosion and — <br /> transport of sediments. Contractor shall determine appropriate control measures for specific site <br /> conditions and provide all necessary materials, labor, and equipment to control erosion and off- <br /> site sediment transport. Erosion control plans shall also include: details for monitoring erosion <br /> and sediment control measures during construction; a maintenance program with provisions for <br /> inspection, reseeding, repairs or reconstruction; and plans addressing the removal of control <br /> measures and site restoration following construction. Contractor shall maintain erosion and _ <br /> sediment control measures as required and repair any damage caused by storms so that the <br /> measures will provide the required function. <br /> Contractor shall be responsible throughout the duration of the project for installing, constructing, <br /> inspecting and maintaining the control measures and for removing and disposing of temporary <br /> control measures. Unless otherwise directed by the Engineer or specified in these Special <br /> Provisions, the Contractor's responsibility shall continue throughout any temporary suspension <br /> of work. <br /> Soil stabilization practices and sediment control measures, including minimum requirements, _ <br /> shall be provided throughout the winter season, defined as between October 15tH and April 15tH <br /> July 2007 Division III-31 NEI Phase II Water and Sewer i <br /> CIP Nos. 7468, 7589, 7590 <br />