23A - PROJ - WATER MAIN IMPROVEMENTS

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CITY OF SANTA ANA SPECIFICATIONS Permit & Plan Prior to beginning any work, if applicable, the Contractor shall prepare and submit a Storm Water Pollution Prevention Plan ( SWPPP), and a Wet Weather Erosion Control Plan (WWECP) if the soil will be disturbed during the rainy season (November 1 to April 15). The SWPPP must be prepared before construction activities begin and must be implemented year -round throughout construction. A WWECP must be prepared prior to each rainy season, and must be implemented throughout that rainy season. The SWPPP and the WWECP shall be developed and implemented in accordance with the County Wide Storm Water Management Plan, National Pollutant Discharge Elimination System (NPDES) Permit No. CAS 004001 and any other requirements established by the City. Best Management Practices (BMP) referenced are from the California Storm Water Best Management Practice Handbooks (Construction, Municipal and Industrial). Appendix B provides forms that the Contractor shall complete and certify. The Contractor shall assess site conditions, identify construction activities with the potential to cause storm water pollution, and then identify the BMP that will best suit the construction activities. The SWPPP and the WWECP shall include a site map of the project providing the following information, if applicable, but not limited to: (a) The boundary of the construction site(s). (b) The area of the construction site(s) in acres. (c) Location of existing storm drain facilities. (d) Types and locations of storm water structures, controls, and /or BMP, which will be built /utilized to control storm water pollution during construction. (e) Construction and erosion control material storage areas. (f) Temporary stockpile and construction waste storage areas. (g) Construction vehicle storage and service areas. (h) Watershed boundary of off -site areas that drain into the construction site. (i) The boundary of the drainage area where storm water leaves the construction site. (j) Areas of soil disturbance and locations of potential soil erosion areas requiring BMP during construction. (k) Drainage patterns and slopes anticipated after major grading activities. The above information should be updated as needed to meet evolving construction conditions. The Contractor shall coordinate storm water pollution prevention work with all other work done on the contract and is responsible for ensuring that all project contractors and subcontractors implement all applicable BMP. If the measures being taken by the Contractor are inadequate to prevent storm water pollution effectively, the Engineer may direct the Contractor to revise the operations and the SWPPP and /or the WWECP measures. The directions will be in writing and will specify the items of work for which the Contractor's storm S -7d 23A -74