AgdaPkt 2008-04-28 - Laserfiche WebLink

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78 ATTACHMENT 4Page 36 to storm drains and adjacent water bodies the following erosion- and sediment- control measures would be included in the project's construction specifications, based on standard industry measures and standard dust-reduction measures. . Cover or apply nontoxic soil stabilizers to inactive construction areas that could contribute sediment to waterways. . Enclose and cover exposed stockpiles of dirt or other loose, granular construction materials that could contribute sediment to waterways. . Contain soil and filter runoff from disturbed areas by berms, vegetated filters, silt fencing, straw wattle, plastic sheeting, catch basins, or other means necessary to prevent the escape of sediment from the disturbed area. . Prohibit the placement of earth or organic material where it may be directly carried into a stream, marsh, slough, lagoon, or body of standing water. . Prohibit the following types of materials from being rinsed or washed into streets, shoulder areas, or gutters: concrete, solvents and adhesives, fuels, dirt, gasoline, asphalt, and concrete saw slurry. . Conduct dewatering activities according to the provisions of the SWPPP. Prohibit placement of dewatered materials in local water bodies or in storm drains leading to such bodies without implementation of proper construction water quality control measures. (MMRP Mitigation WQ-1). Finding: This potential impact will be reduced to a less-than significant level with the implementation of Mitigation Measure H-1 and Measure WQ-1. Potential Impact 7-b: There is the potential for an accidental spill or leak to occur during construction activities. (IS/MND Impact 7 -b, p. 3-40). Finding: This potential impact will be reduced to a less-than significant level with the implementation of Mitigation Measure H-1. E. HYDROLOGY AND WATER QUALITY 1. Impacts on Hvdrolo~1V and Water Quality Potential Impact 8-a: Due to the presence of hazardous materials at the project site, such as fuels, oils, grease, lubricants, solvents, adhesives, paints, and other materials, excavation and construction-related runoff could contain soil and other pollutants that may contribute to reduced water quality in local water bodies. (IS/MND Impact 8-a, p. 3-46). Finding: Any potential impacts that could occur as a result of the release of the above-mentioned materials through project construction would be minimized and contained through implementation of standard BMPs and measures identified in the S\NPPP. Additionally, the impact is considered less- than-significant with implementation of Mitigation Measure WQ-1.