Storm Water Pollution Prevention Plan (SWPPP) - the City of Lompoc!

Order10. This General Permit does not authorize discharges of fill or dredgedmaterial regulated by the U.S. Army Corps of Engineers under CWA §404 and does not constitute a waiver of water quality certification underCWA § 401.11. The primary storm water pollutant at construction sites is excesssediment. Excess sediment can cloud the water, which reduces theamount of sunlight reaching aquatic plants, clog fish gills, smotheraquatic habitat and spawning areas, and impede navigation in ourwaterways. Sediment also transports other pollutants such asnutrients, metals, and oils and greases.12. Construction activities can impact a construction site’s runoff sedimentsupply and transport characteristics. These modifications, which canoccur both during and after the construction phase, are a significantcause of degradation of the beneficial uses established for waterbodies in California. Dischargers can avoid these effects throughbetter construction site design and activity practices.13. This General Permit recognizes four distinct phases of constructionactivities. The phases are Grading and Land Development Phase,Streets and Utilities Phase, Vertical Construction Phase, and FinalLandscaping and Site Stabilization Phase. Each phase has activitiesthat can result in different water quality effects from different waterquality pollutants. This General Permit also recognizes inactiveconstruction as a category of construction site type.14. Compliance with any specific limits or requirements contained in thisGeneral Permit does not constitute compliance with any otherapplicable requirements.15. Following public notice in accordance with State and Federal laws andregulations, the State Water Board heard and considered all commentsand testimony in a public hearing on 06/03/2009. The State WaterBoard has prepared written responses to all significant comments.16. Construction activities obtaining coverage under the General Permitmay have multiple discharges subject to requirements that are specificto general, linear, and/or active treatment system discharge types.17. The State Water Board may reopen the permit if the U.S. EPA adoptsa final effluent limitation guideline for construction activities.2009-0009-DWQ 3 September 02, 2009