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Table 3 Continued-Summary of Significant Impacts and Mitigation Meamm Accidental overflow of flood waters The proponent should construct berms or take other measures to from Corral Hollow Creek into the prevent a 100-year, 24-hour flood in Corral Hollow Creek from reclaimed gravel pit could create a accidently overflowing into the pit. safety hazard, or cause substantial damage to the operations, or result in An acceptable alternative to the construction of berms would be the transport of contaminants from the that the project applicant provide an analysis of Corral Hollow project site to downstream areas or into Creek for the 100-year, 24-hour storm event to determine the groundwater. Although unlikely to likelihood of overtopping and diverting into the pit. Should occur, nmoff of contaminants from the overtopping prove to be a likely event, the project applicant project site into Corral Hollow Creek would then be required to submit to the reviewing agency an may adversely impact aquatic habitat engineering plan for prevention of said overtopping. Acceptable and populations of existing species, or mitigations would include the construction of berms or levees or runoff may impair other beneficial uses the widening and deepening of the channel adjacent to the project downstream. site. Air Owli Construction activities such as clearing, Prior to construction, a PM-10 Dust Prevention and Control Plan excavation, and grading operations, shall be prepared that specifies dust control measures, construction vehicle traffic,and wind demonstrates the availability of needed equipment and personnel, blowing over exposed earth would and identifies a responsible individual for implementation. The generate exhaust emissions and fugitive plan shall include the following: particulate matter emission. • Suspend dust producing activities during winds equal to or greater than 20 mph. • Sprinkle exposed and disturbed soil surfaces during the dry season and as needed to control fugitive dust. • Sprinkle temporary soil stockpiles. Soil to be stockpiled longer than three months be seeded. • Require a speed limit on the site of 15 mph or less. • Disturbed but inactive portions of the site shall be watered with a dust suppressant, covered or reseeded. • Materials transported by truck shall be covered or wetted down to control dust. • The entire paved area is to be cleaned as needed to control fugitive dust. The transfer station would create a Clean the tipping floor and transfer trailers daily or as required number of odor sources. by the Local Enforcement Agency, and periodically steam clean the transfer trailers. Because the sorting, recycling, and transfer operation will take place within the transfer station building, exposure of wastes to the atmosphere is reduced , which will mitigate for odors. Develop standard operating procedures (S to address the elimination of the generation and emission of odor. L:IPROJECT/397IMRF/RSI-I.TCY Revision 1.0 17 December 15, 1993