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<br />Draft Findings a/Fact and Mitigation Monitoring Reporting Program (applies to CEQA only) <br /> <br />primarily sediment transport and local erosion. Additional impacts may be waste products <br />of the construction process and contamination from the use and storage of mechanical <br />equipment. <br /> <br />. The shallowest water table in the project area is 1.8 to 2.4 meters (six to eight feet) deep. <br />The majority of the planned construction activities for the project would occur above the <br />water table. Where groundwater may be encountered, such as for drainage facilities and <br />piles, standard construction practices would include identification of specific groundwater <br />depth and the use of such methods as sealed courses, and similar methods, where necessary. <br /> <br />Mitigation: Because modification and realignment of the OCFCD Lane Channel would not take <br />place within the active flood control channel, any potential impacts to receiving waters would be <br />avoided. The relocated Lane Channel would be constructed per current standards of the OCFCD <br />and designed to convey 100-year discharges. The City shall implement the following mitigation <br />measures: <br /> <br />HYD-l <br /> <br />Mitigation of the water pollution impacts of construction activities will be primarily <br />addressed in the Storm Water Pollution Prevention Program (SWPPP) prepared for <br />the project. The SWPPP shall be implemented at the appropriate level to protect <br />water quality at all times throughout construction. Non-stormwater Best <br />Management Practices (BMPs) must be implemented year round. The contractor <br />shall incorporate into the SWPPP the necessary critical temporary, permanent, and <br />post-construction control measures appropriate for the project. <br /> <br />HYD-2 <br /> <br />In order to meet the requirements of the Countywide Drainage Area Management <br />Plan, the following notes will be incorporated into the construction plan sheets. <br /> <br />· Construction sites shall be maintained in such a condition that an unanticipated <br />storm does not carry wastes or pollutants off the site. <br /> <br />· Such "discharges" of material other than storm water are allowed only when <br />necessary for performance and completion of construction practices anywhere <br />they do not: cause or contribute to a violation of any water quality standard; <br />cause or threaten to cause pollution contamination, or nuisance; or contain a <br />hazardous substance in a quantity reportable under Federal Regulations 40 CFR <br />Parts 117 and 302. <br /> <br />· Materials which may have effects of pollution include but are not limited to: <br />solid or liquid chemical spills; wastes from paints, stains, sealants, glues, limes, <br />pesticides, herbicides, wood preservatives and solvents; asbestos fibers, paint <br />flakes or stucco fragments; fuels, oils, lubricants and hydraulic, radiator or <br />battery fluids; fertilizers, vehicle/equipment wash water and concrete wash <br />water; concrete, detergent or floatable wastes; wastes from any <br />engine/equipment steam cleaning or chemical degreasing; and super-chlorinated <br />potable water line flushings. During construction, disposal of such materials <br />shall occur in a specified and controlled temporary area on site, physically <br />separated from potential storm water run-off, with ultimate disposal in <br />accordance with local, state and federal requirements. <br /> <br />Alton Avenue Overcrossing at SR-55 <br /> <br />K-ll <br /> <br />April July 2005 <br /> <br />55C-29 <br />