Environmental Declaration WPCP 20240409

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2. Project Description • A plan for the emergency cleanup of any spills of fuel or other materials would be prepared and implemented by the contractor. • Erosion and sediment control BMPs would be installed prior to the start of any ground -disturbing activities, as detailed in the SWPPP. ■ Silt fences or fiber rolls would be installed, or other suitable measures would be implemented around the perimeters of the construction zone, staging areas, temporary stockpiles, and drainage features, as detailed in the SWPPP. • Water produced by construction site dewatering would be detained and treated using sedimentation basins located on the Project site, sediment traps (when water is flowing and there is sediment), or other measures, to ensure that discharges to receiving waters are in accordance with the State of California General Permit for Storm Water Discharges Associated with Construction Activity (General Permit). • All stockpiles would be contained using perimeter controls such as berms, dikes, fiber rolls, silt fences, sandbags, gravel bags, or straw bale barriers. All stockpiles would be covered with polyethylene plastic sheeting or other impermeable materials. • BMPs would be identified in the contractors SWPPP to prevent raw cement; concrete or concrete washings; asphalt; paint or other coatings; and oils or other petroleum products from entering watercourses or storm drains. All concrete waste and wash water would be either returned with each concrete truck for disposal at the concrete batch plant or disposed of at a dedicated disposal area. • Construction vehicles and equipment would be inspected to prevent discharge and contamination of soil or water (from external grease and oil or from leaking hydraulic fluid, fuel, oil, and grease). • Equipment would be refueled and serviced at designated construction staging areas. • Discharge of pollutants into water bodies from vehicles and equipment would be avoided by using drip pans, spill kits, berms, and secondary containment. • Sanitation facilities (e.g., portable toilets) would be placed in secondary containments to prevent discharges of pollutants to the stormwater drainage system or receiving water. • Sanitary facilities would be maintained regularly. ■ Hazardous materials would be stored in an area protected from rainfall and stormwater runoff and prevent the offsite discharge of leaks or spills. • All debris materials, sediment, trash, vegetation, or other material removed from the disturbed areas would be disposed of at an approved disposal site. • Non -tidal wetlands and waters of the United States (waters of the U.S.) to be avoided would be marked in the field. • A Construction site Safety Plan would be developed to provide a formal, top -down, systemic approach to identify safety risk, organizational structures, responsibilities, and policies and procedures. 2.5. Project Operation Consistent with its current operations, the WPCP will maintain a 24/7 operational schedule for the Proposed Project. No additional staff will be necessary to oversee the Proposed Project once it is completed. The WPCP will continue to receive influent wastewater in alignment with its existing average and peak flow capacities. The introduction of the new MABR system will enable year-round nitrification. Out of the 0.95 mgd of wastewater routed through the MABR system, approximately 90% of the ammonia will undergo conversion to nitrate. Nitrate removal within the treatment wetland will be monitored, with peak removal anticipated during the summer months, corresponding to elevated temperatures. San Leandro Treatment Wetland 2-16 IS/MND