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New Development Post Construction Stormwater Controls: Urban development is a major contributor to stormwater-caused pollution. Development or redevelopment of property represents an opportunity to incorporate post-construction controls that can reduce water quality impacts over the life of the project. Since the first countywide municipal stormwater permit was adopted in 1993, the Countywide Program's member municipalities have required new development and redevelopment projects to incorporate post-construction stormwater site design, source control, and treatment measures in their projects to the maximum extent practicable (MEP). To meet the MEP standard, municipalities must employ stormwater control measures that are technically feasible (that is, are likely to be effective) and are not cost prohibitive. C.3 Stormwater Technical Guidance The handbook C.3 Stormwater Technical Guidance was designed to help developers, builders, and project sponsors include post-construction stormwater controls in their projects, in order to meet local municipal requirements that reduce the long term impacts of development on stormwater quality and creek channels. This handbook can be downloaded above as a complete document or by chapters and appendices using the Table of Contents provided below. When using this countywide guidance document, please keep in mind that some requirements may vary from one local jurisdiction to the next. In the very early stages of project planning, contact the local permitting agency to schedule a pre-application meeting to learn how the C.3 requirements will apply to your project. TABLE OF CONTENTS
Stormwater Requirements for New Development/Redevelopment: Stormwater Quality Requirements for Developers, Builders and Project Applicants [pdf] Stormwater Detention Requirements for Developers, Builders and Project Applicants [pdf]
Operation and Maintenance Information for Stormwater Treatment Measures-Updated Nov2007[word]
Hydromodification Management Plan (HMP) [pdf] Hydromodification Management Control Area Map (approved October 14, 2009) [pdf] Link for downloading the Bay Area Hydrology Model software and users manual Treatment Control Design Guidance for Mosquito Control[pdf] Treatment Control Operation & Maintenance Guidance for Mosquito Control [pdf] Source Control Model List [word] Soil Guidelines for Stormwater Treatment Measures [pdf] Sustainable Green Streets and Parking Lots Design Guidebook Additional Information |
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