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Phase II Stormwater Permit Update for New Development: Key Insights and Implications

The Phase II Stormwater Permit, originally issued in 2003 and expired in 2008, is undergoing significant updates. The Draft Tentative Order was released in June 2011, followed by a Senate Select Committee Hearing in October 2011. Key issues include Low Impact Development (LID), hydromodification management, and alternative compliance strategies. Predictions indicate a broader application to local governments with similar project thresholds as Phase I. New requirements could lead to more complex reporting and potential changes in watershed management programs.

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Phase II Stormwater Permit Update for New Development: Key Insights and Implications

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  1. Phase II Stormwater PermitNew Development Update

  2. Timeline • Current permit issued in 2003 • Expired in 2008 • Draft Tentative Order June 2011 • Senate Select Committee Hearing October 2011 • CASQA/Water Board staff meetings • What’s next?

  3. Issues • Low Impact Development • Infiltration/Evapotranspiration/Reuse • Hydromodification Management • Watershed Characterization • Alternative Compliance Strategies • Watershed Management • No change to existing programs?

  4. New Phase II -- Predictions • Permit will apply to more local governments • Watershed management will go away • Project thresholds will be similar to Phase I permits • LID requirements, including some retention requirement • Hydromodification requirements, probably simplified compared to Phase Is • More reporting • Messy and confusing provisions for alternative compliance

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