University of California, Santa Barbara
OP-23: Rainwater Management

All development that creates and/or replaces ≥ 2,500 sq feet of impervious surface is required to comply with the Central Coast Regional Water Quality Control Board's Post-Construction Requirements ("PCRs"; Resolution No. R3-2013-0032). Depending on total impervious surface sizing category, a project will be required to implement low impact development site design measures, treatment of 85th percentile rain event, retention of 95th percentile rain event, and/or management of peak flows.

The Stormwater Management Program Guidance Document has been prepared by UC Santa Barbara pursuant to the MS4 Phase II General Permit (WQO No. 2013-0001-DWQ, General Permit), and the associated program has been drafted to comply with the General Permit. More importantly, this Guidance Document serves as a framework for identifying, assigning, and implementing control measures and Best Management Practices (BMPs) intended to reduce the discharge of pollutants from the MS4 and to protect downstream water quality. In addition, this document serves as a planning and guidance document that is used by UC Santa Barbara's regulatory body and all University departments, contractors, and members of the general public throughout the UC Santa Barbara community, which includes students, faculty, staff, and visitors. As required by the General Permit, UC Santa Barbara abides by Resolution R3-2013-0032, Post-Construction Stormwater Management Requirements for Development Projects in the Central Coast Region. This resolution requires new development and redevelopment projects to be designed to incorporate permanent stormwater management features such as general site design measures (permeable pavers, disconnected downspouts, rain gardens, etc.), engineered treatment features that will clean stormwater before it leaves the site, or infiltration basins that will retain stormwater at the site. Projects that create or replace 2,500 square feet of impervious surface or greater are required to comply. UCSB's stormwater management policy is addressed in the UCSB Water Action Plan. In summary, the Plan covers the regional physiogeography and hydrology on and adjacent to the UCSB campus, as well as the local climate conditions that influence stormwater management. The stormwater policy also covers environmental protection and regulatory context as it relates to stormwater management. Importantly, it also addresses historical, current, and planned management efforts in environmentally sensitive habitat areas, natural areas, and construction sites, including best management practices and education and outreach efforts to the UCSB and greater Santa Barbara community. Some of the most notable stormwater management accomplishments that the Campus has achieved to date include: • Organizing educational events which include public outreach tabling , coastal cleanup days, tours of restoration projects, campus touch tanks, and LEED certified buildings; • Providing training on best management practices to campus staff; • Developing policies and standards for new development projects such as requiring incorporation of low impact development stormwater features; • Labeling high-priority storm drains throughout campus; • Launching a comprehensive stormwater website that includes current planning documents and information on stormwater best practices; • Creating a campus stormwater map, which includes LID projects, storm drain outfalls, receiving water bodies, and overall storm drain network. To protect beneficial uses and promote the desired conditions of healthy watersheds, UCSB has developed post‐construction stormwater design requirements for all new development projects. Stormwater features used include permeable pavement, rain gardens, bioswales, disconnected roof drains, and curb cuts.

Map of the UCSB Stormwater Drainage Features https://www.waterboards.ca.gov/centralcoast/water_issues/programs/stormwater/muni_phase2/non_traditional_ms4/ucsb/appendix_b2_stormwaterdrainagefeatures.pdf