New Development and Significant Development 12/21/20151 New Development & Significant Redevelopment

New Development and Significant Development 12/21/20152 Phase II Minimum Control Measure Post-Construction Stormwater Management in New Development and Redevelopment Develop a program, using an ordinance or other regulatory means, to address runoff from new development and redevelopment projects that disturb > 1 acre Implement strategies with a combination of structural and/or non-structural BMPs Ensure adequate long-term operation & maintenance (O&M) of BMPs

New Development and Significant Development 12/21/20153 Phase II Minimum Control Measure:  The BMPs chosen should:  be appropriate for the local community  minimize water quality impacts  attempt to maintain pre-development runoff conditions Participate in watershed planning efforts Assess existing ordinances, policies, and programs that address stormwater runoff quality Provide opportunities for public participation 3

New Development and Significant Development 12/21/20154 EPA Resources Low Impact Development  Smart Growth   Using Smart Growth Techniques as Stormwater Best Management Practices  Stormwater Guidelines for Green, Dense Redevelopment.  Protecting Water Resources with Smart Growth National Management Measures to Control Nonpoint Source Pollution from Urban Areas  Post Construction Guidance Manual coming Fall 2007

New Development and Significant Development 12/21/20155 Auditing/Inspecting a New Development Program Specific new development requirements can vary significantly within the state How does the MS4 apply the new development standards in the MS4 permit? Does the MS4 have a stormwater manual? Base your audit/inspection primarily on enforceable conditions in the permit If permit is not specific, determine if the MS4’s new development program addresses the following components.

New Development and Significant Development 12/21/20156 Common Program Components Legal Authority Stormwater Design Standards Plan Review and Approval Construction Inspection of New Development Controls Maintenance/Enforcement Tracking and Monitoring Training and Education

New Development and Significant Development 12/21/20157 Legal Authority Does the MS4 have the legal authority (ordinance) to:  Require stormwater considerations during new development and redevelopment planning  Specify contents of plans  Establish standards for BMPs performance  Inspect BMPs during and after construction  Require compliance with the approved plans  Require maintenance of the BMP for the life of the structure What exemptions does the legal authority allow?

New Development and Significant Development State Water Board Order WQ Precedential decision on Standard Urban Storm Water Mitigation Plans (Development Standards) Development standards require treatment controls for new and significant redevelopment projects Regional Board MS4 permits must be consistent with the State Board’s decision

New Development and Significant Development Provisions applicable to all categories Peak storm water runoff discharge rate Conserve natural areas Minimize storm water pollutants of concern Protect slopes and channels Provide storm drain system stenciling and signage Properly design outdoor material storage areas

New Development and Significant Development Provisions applicable to all categories Properly design trash storage areas Provide proof of ongoing BMP maintenance Design standards for structural or treatment control BMPs  Volume or flow based standard

New Development and Significant Development SUSMP Numerical Design Standards Design standards for volumetric treatment control BMPs:  85 th percentile 24-hour rainfall event  Volume of runoff to achieve 80% volume treatmetn  0.75 inch storm event Design standards for flow based treatment control BMPs:  0.2 inches/hour intensity  Two times the 85 th percentile hourly rainfall intensity

New Development and Significant Development 12/21/ Stormwater Design Standards Does the MS4 have clear, specific Stormwater Design Standards? Do the standards:  Set minimally acceptable BMPs and sizing criteria?  Address source controls as well as treatment controls?  Address BMPs for different pollutants?  Provide incentives (credits) for innovative practices (like reduced impervious surfaces, buffers, etc.)  Allow exemptions? What are the minimum thresholds for when the standards apply? Does the MS4’s ordinance require compliance with the stormwater design standards?

New Development and Significant Development 12/21/ Local Stormwater Manuals The Center for Watershed Protection’s Stormwater Manager’s Resource Center summarizes the basic requirements in a local stormwater design manual

New Development and Significant Development Example: City of Los Angeles-BMP Manual

New Development and Significant Development Select the most efficient BMP for the pollutant(s) generated

New Development and Significant Development

12/21/ Plan Review and Approval How does the MS4 review and approve stormwater plans for new development and redevelopment?  How early in the planning process is stormwater addressed (e.g., conceptual planning stage?)  Is the review based on the MS4’s Stormwater Design Standards?  Does the MS4 document the process for plan review and approval (e.g., use a checklist)?  Are requirements for long-term O&M addressed during review?

New Development and Significant Development 12/21/ Plan Review and Approval – File Review Conduct a review of the following types of files: Approved plan(s) for a private project with post-construction controls and one for a public project  Do approved plans follow MS4 standards? Are they detailed? Did the MS4 provide detailed comments to the developer? Approved maintenance agreement(s)  Do the maintenance agreements discuss maintenance responsibilities, inspection requirements, when maintenance may be needed, etc.? Inspection/enforcement file(s) for completed projects with post-construction controls  How detailed are inspection reports? What type of enforcement actions are taken?

New Development and Significant Development Example: Stormwater Requirements Applicability Checklist /pdf/ds-5601stormwtr.pdf

New Development and Significant Development Example: Design Checklist

New Development and Significant Development 12/21/ Construction Inspection of New Development Controls Do construction inspectors verify that “post-construction” BMPs have been installed? Are inspectors trained on post-construction BMP design and installation? Are as-built plans developed? How is this information transferred to maintenance inspection staff?

New Development and Significant Development New Development Example Santa Monica, CA City sends out a form to all owners of structural stormwater controls each year asking if the control had been inspected and maintained Owners who do not respond are prioritized for inspection by the City

New Development and Significant Development 12/21/ Maintenance How often does the MS4 inspect post-construction BMPs?  BMPs on private property; BMPs on public land? How does the MS4 ensure maintenance on private property? (maintenance agreements, MOUs, etc) Who maintains post-construction BMPs?  MS4, private landowner, combination ?

New Development and Significant Development 12/21/ Enforcement What type of enforcement options does the MS4 have to ensure post-construction BMPs are installed and maintained? Does the MS4 have an escalating enforcement plan to document steps that will be taken to address non- compliance Are staff educated on how to use penalty provisions when necessary? How often are the enforcement options used?

New Development and Significant Development 12/21/ Tracking and Monitoring How does the MS4 track the installation and maintenance of post-construction BMPs? Do they collect information on BMP types, locations, owners, maintenance schedules, inspection findings, etc.? How does the MS4 assess the effectiveness of post- construction BMPs?  Is this information sent back to plan review and inspection staff?

New Development and Significant Development 12/21/ Example: BMP Effectiveness Protocols Technology Acceptance Reciprocity Partnership (TARP) – CA, MA, MD, NJ, PA, VA  techservices/tarp/  A uniform method to collect and evaluate data on technology performance and cost Washington’s Technology Assessment Protocol (TAPE)  tape_ctape.html  Intended for ultra-urban treatment technologies and those treatment technologies that do not have a chemical component for treatment

New Development and Significant Development 12/21/ Training and Education What type of training on new development does the MS4 provide to:  Plan review staff  Construction inspectors  BMP maintenance inspectors  Code enforcement, others? Does the MS4 also educate local developers and engineers so they develop adequate plans? Does the MS4 educate property owners on maintenance of BMPs?

New Development and Significant Development 12/21/ In-Field Activities Inspect post-construction BMPs to determine whether they are still installed and maintained  Use final, approved plans for the project  Assess whether both structural and source control BMPs were installed  Were any BMPs removed or modified?  Are the BMPs being maintained?

New Development and Significant Development 12/21/ Common Compliance Problems MS4 lacks specific standards for post-construction controls MS4 lacks review criteria, checklists, or a formal plan review process MS4 does not require maintenance of post- construction BMPs MS4 does not have a system to track structural and source control BMPs for inspections and on-going maintenance