What’s New in Stormwater Requirements for

Development Projects?

Jill Bicknell, P.E. EOA, Inc.

New Development WorkshopMay 22, 2013

Outline of Presentation

C.3 Requirements Effective in FY 12-13

New Program Guidance and Tools

C.3 Requirements for FY 13-14 (Regional Submittals)

C.3 Issues for the Next Permit

Questions and Answers

The Year in Review New Requirements Took Effect on

December 1, 2012:• Special Land Use and Road Requirements

for Public Projects

• Low Impact Development (LID) Requirementsfor Public Projects

• Site Design Requirements for Small Projects and Single Family Home Projects

Discussions on the next Municipal Regional Permit (MRP) began!

Special Land Use Requirements

“Special land use categories”: • Retail gasoline outlets• Auto service facilities• Restaurants• Uncovered parking lots - stand alone or part of

another use (includes top level of parking structure unless plumbed to sanitary sewer)

Projects in these categories that create and/or replace 5,000 sq. ft. or more of impervious surface must implement site design, source control, and treatment measures

Road and Trail Requirements C.3 requirements apply to road and trail projects

that create and/or replace 10,000 sq. ft. or more of contiguous impervious surface New roads Sidewalks and bike lanes built

as part of new roads Widening of existing roads

with traffic lane(s) Trails >10 ft wide or < 50 ft

from creek bank

Road and Trail Projects NOT Regulated

Roadway reconstruction; Road widening that does not add a travel lane; Sidewalks and bike lanes along existing roads; Impervious trails <10’ wide, >50’ from creek; Sidewalks, bike lanes and trails that drain to

vegetated areas or made of permeable paving; Routine maintenance and repair; Pavement resurfacing within existing footprint.

LID Treatment Requirements

“LID treatment” is:• Rainwater

harvesting/reuse, • Infiltration, • Evapotranspiration, • Or, if these are

infeasible, biotreatment. Feasibility analysis (using

standard forms) is required for public and private projects

Effective DatesWhat if the project is already “in the pipeline”?

Projects in the review process are exempt from requirements for LID treatment, 5,000 sq.ft. threshold, and road/trail project applicability if:

• Public Projects –—If funding committed and construction scheduled

to begin by December 1, 2012

• Private Projects – —Deemed complete before 12/1/09 and project applicant is

“diligently pursuing the project”—Deemed complete after 12/1/09 and project applicant

receives final discretionary approval before 12/1/11

Site Design Requirements for Small and Single Family Home Projects

Provision C.3.i: Small projects > 2,500 sq. ft. and < 10,000 sq. ft. and detached single family homes > 2,500 sq. ft. must include one of six site design measures: Direct roof runoff into cisterns or rain barrels; Direct roof runoff onto vegetated areas; Direct sidewalk & patio runoff onto vegetated areas; Direct driveway & parking lot runoff onto vegetated areas; Construct sidewalks & patios with permeable surfaces; Construct bike lanes, driveways & parking lots with

permeable surfaces

Brochures prepared by the Bay Area Stormwater Management Agencies Association:

• Landscape Designs for Stormwater Management

• Rain Gardens• Rain Barrels and Cisterns• Pervious Paving

Brochures available at:www.flowstobay.org (click on “Municipalities”, “New Development”, “Flyers”)

Site Design Guidance Brochures

Flyer: “New Stormwater Control Requirements for Projects that Create and/or Replace 2,500 to 10,000 Sq. Ft. of Impervious Surface”

C.3.i Stormwater Checklist for Small Projects C.3 Regulated Projects Checklist Flow Chart of C.3 / C.6 Stormwater Review Process Hydraulic Sizing Method Worksheets C.3 Stormwater Technical Guidance – major update

in progress, to be completed end of June Appendix L: Site Design Requirements for Small

Projects – available online now

Additional Program Guidance

No new requirements for development projects or individual agencies

BASMAA Regional Submittals Green Streets Pilot Project Summary

Report (due 9/15/13) Status Report on Application of

Feasibility/Infeasibility Criteria(due 12/1/13)

C.3 Requirements for FY 13-14

Green Streets Report Per C.3.b, Permittees required to:• Construct 10 pilot green street/parking lot

projects within Bay region by end of permit term• Conduct monitoring or modeling to show water

quality benefits achieved• Report on any projects in their jurisdictions in

annual reports• Collectively submit a summary of all projects

completed by January 1, 2013 as part of FY 12-13 Annual Report

Green Streets Report Ten projects will be substantially

completed by 12/1/14 and seven other projects are being funded/designed

SMCWPPP Projects:Donnelly Ave, Burlingame Bransten Rd, San Carlos

Green Streets Report Schedule for Completion:• Draft report to BASMAA Development

Committee – late May 2013• DC reps share with local programs – June/July• Revised draft to BASMAA DC - August• Final draft to SMCWPPP for approval – August• Final report to BASMAA for approval and

submittal to Water Board – late August

• Due date – 9/15/13

Feasibility Status Report Low impact development (LID) treatment

defined as rainwater harvesting/use, infiltration, or evapotranspiration, or if those are infeasible, biotreatment

BASMAA Feasibility Criteria Report submitted to Water Board on 12/1/2010

Beginning 12/1/2011 (12/1/2012 for public projects) – 100% LID treatment required

Feasibility Status Report Permittees must submit Status Report to

Water Board by 12/1/13 containing:• Most common feasibility criteria used• Barriers/constraints to harvesting/use and

infiltration, and strategies to address• Proposed changes to feasibility criteria• Guidance to Permittees for use

Feasibility Status Report Progress to date:• BASMAA developing report via in-kind

contributions from SMCWPPP, SCVURPPP and CCCWP and consultant help

• Data collection completed for FY 11-12 approved projects; FY 12-13 data to be collected in Fall 2013

• Additional modeling studies being conducted on infiltration capacity of bioretention systems in various soil types

• Report sections being drafted

Feasibility Status Report Schedule for Completion:• Draft report to BASMAA Development

Committee – late June• DC reps share with local programs – July/Aug• Revised draft to BASMAA DC - September• Final draft to SMCWPPP for approval –

October/November• Final report to BASMAA for approval and

submittal to Water Board – late November• Due date – December 1, 2013

C.3 Topics for MRP Reissuance-Water Board Issues

Regulated project threshold – drop to 5,000 sf of impervious surface

Road reconstruction/green street requirements – changes?

Special Projects – change to criteria?(based on review of reports)

Pervious paving – better define design and maintenance requirements

C.3 Topics for MRP Reissuance-Water Board Issues, cont.

Bioretention – add details regarding design, soils, plant health/irrigation

Hydromodification management criteria consistent criteria throughout region

BMP installation inspections• Conduct during construction, integrate into

building/occupancy approvals• Take enforcement action if improper

installation

Questions?

Jill Bicknell, P.E.408-720-8811 x1

jcbicknell@eoainc.com