Climate Change and Stormwater Management – Lessons from...
Transcript of Climate Change and Stormwater Management – Lessons from...
![Page 1: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/1.jpg)
www.geosyntec.com
Climate Change and Stormwater Management – Lessons from Hurricane Sandy and Future
Regulatory Initiatives
Saugus River Watershed Council – January 29, 2013 Steven Roy, Principal, LEED® AP
![Page 2: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/2.jpg)
www.geosyntec.com
Ann Arbor
Atlanta
Austin
Baton Rouge Boca Raton Boston (2)
Cape Canaveral
Chicago (2)
Columbus Greenville
Houston Huntington
Huntington Beach
Jacksonville Knoxville
Lake Charles
Los Angeles Macon
Milwaukee
New York City Oakland
Pasadena
Pensacola
Portland Princeton
Raleigh
Richmond San Bernardino
San Diego (2)
Santa Barbara
Seattle
Tacoma
Tampa
Washington, D.C.
United States Locations
Founded in 1983, 100% employee-owned
Practicing in select engineering and environmental disciplines
1,000 employees in 60 offices (US, Canada, Malaysia, United Kingdom)
90 Water Resources Professionals
75% of our technical staff hold advanced degrees in an engineering or environmental science discipline
Concentrating on creative environmental solutions
Corporate Overview
![Page 3: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/3.jpg)
www.geosyntec.com
Presentation Objectives • Brief Review of Hurricane Sandy and Water Resources Impacts
• Understanding of the new regulatory drivers for stormwater management – CERCLA/RCRA/NPDES
• What is Low Impact Development and Green Infrastructure?
• Federal Facilities - EISA Section 438 requirements and State Stormwater requirements
• Municipal Separate Storm Sewer (MS4 )Permit Requirements and Climate Change Adaptation
***
![Page 4: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/4.jpg)
www.geosyntec.com Recap of 2012
• The following video from Climate.Gov highlights the weather extremes from 2012
• http://www.climate.gov/#climateWatch
![Page 5: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/5.jpg)
www.geosyntec.com Sandy Facts • Damage of at least $20 billion.
Preliminary estimates of losses that include business interruption surpass $50 billion, behind only Hurricane Katrina
• DC Water estimated that 240 million gallons of untreated, but diluted, wastewater were discharged into the Potomac and Anacostia Rivers as the sewer system and treatment plants were inundated
• Highest Rainfall totals Andrews AFB 15.3” Wildcrest, NJ 11.6” Milton, MA 3.3”
![Page 6: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/6.jpg)
www.geosyntec.com
Superstorm Sandy Peak Wind Gusts - October 30, 2012 Source: EQECAT, Inc.
![Page 7: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/7.jpg)
www.geosyntec.com
![Page 8: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/8.jpg)
www.geosyntec.com
NOAA’s GOES-13 satellite - Post-Tropical Sandy rolling inland on Tuesday, Oct. 30 at
6:02 a.m. EDT. (NASA)
![Page 9: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/9.jpg)
www.geosyntec.com
Sandy 14.06
Donna 10.01 (1960)
![Page 10: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/10.jpg)
www.geosyntec.com
![Page 11: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/11.jpg)
www.geosyntec.com
• In Bridgeport, CT, 15 million to 20 million gallons of partially treated sewage went into Long Island Sound. One Estimate was 1B gallons of untreated wastewater in NY/NJ.
• A 349,000-gallon diesel fuel spill in New Jersey’s Arthur Kill waterway
• NYS 2100 Commission – Jan. 6, 2013 – released 175 page report on infrastructure adaptation plans and projects in the aftermath of Hurricane Sandy. Storm barriers Green infrastructure Infrastructure improvements “Climate change is dramatically increasing the frequency and the
severity of these situations,”
![Page 12: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/12.jpg)
www.geosyntec.com
• A New York state commission is recommending that the state invest billions of dollars in "green infrastructure" improvements that retains stormwater and reduce the impact of extreme storm events in the wake of Hurricane Sandy -- a move that would dovetail with a new White House study that expects such storms to become more common due to global warming, as well as EPA's initiative to encourage green infrastructure development.
NYS 2100 Commission Findings
![Page 13: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/13.jpg)
www.geosyntec.com
• 6.2 million cubic yards of debris was left behind in New Jersey after Hurricane Sandy -enough to fill a 170-acre landfill
• In NJ, 80 out of 369 wastewater-treatment plants were damaged during and after the storm
• Extreme weather is the new normal
![Page 14: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/14.jpg)
www.geosyntec.com
![Page 15: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/15.jpg)
www.geosyntec.com
![Page 16: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/16.jpg)
www.geosyntec.com
Average rate of sea level rise of 2.5 mm/yr in last 80 years (USGS)
• By 2100, average precipitation in the spring and winter is projected to increase 20 percent to 30 percent in the Northeast.
• February 2008’s statewide average of 8.7 inches of precipitation, about 270 percent above normal, made it the wettest February on record.
• In recent years, the statewide cumulative precipitation of Massachusetts has been 40 percent above normal levels.
![Page 17: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/17.jpg)
www.geosyntec.com
![Page 18: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/18.jpg)
www.geosyntec.com Future Solutions Involve
• Climate Change Planning • Mitigation • Adaptation
![Page 19: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/19.jpg)
www.geosyntec.com
What are the Drivers for Stormwater Management?
• Green Infrastructure for Combined Sewer Overflow Control – Long-Term Control Plans (LTCPs)
• Energy Independence and Security Act of 2007 (EISA)- Federal Facilities
• LEED/Green Buildings • New State and Federal Stormwater Regulations
New MS4 Regulations Coming to a State Near You 2013 EPA Stormwater Rule Residual Designation Authority – CWA Section 402p
• Impervious Surfaces Rule!
![Page 20: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/20.jpg)
www.geosyntec.com
www.epa.gov/owow/nps/lid/section438
![Page 21: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/21.jpg)
www.geosyntec.com Overview • Stormwater runoff from urban (highway, industrial,
commercial, residential areas have concentrations of pollutants that may be of concern for sediment recontamination (dependent on clean up levels)
• Stormwater volumes can contribute to migration of sources even if “clean” (stormwater runoff to CSOs or infiltration and resulting pollutant movement to sediments)
• The potential for stormwater contributing to recontamination, either real or perceived, can limit the ability to attract interest in Brownfield redevelopment.
![Page 22: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/22.jpg)
www.geosyntec.com
Sediment Recontamination History
Source: Analysis of Recontamination of Completed Sediment Remedial Projects. Steven C. Nadeau and Merton M. Skaggs, Jr., P.E. Paper D-050, in: E.A. Foote and G.S. Durell (Conference Chairs), Remediation of Contaminated Sediments—2007. Proceedings of the Fourth International Conference on Remediation of Contaminated Sediments (Savannah, Georgia; January 2007). ISBN 978-1-57477-159-6, published by Battelle Press, Columbus, OH,
Urban Wet Weather Recontamination Sources:
•Stormwater •CSOs •SSOs
?
?
?
![Page 23: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/23.jpg)
www.geosyntec.com Sediment Issues:
Typical Urban/Industrial Runoff Stormwater Source Pollutants
Current Stormwater Pollutants Dioxin (General atmospheric) Copper (Break pad linings, atmospheric, pipes/downspouts) Zinc (Roofing materials, atmospheric, pipes/downspouts) Lead (smaller concentrations – newer development,
galvanized pipes) Pesticides (applied to landscaping)
Legacy Pollutants PCBs (but still circulating/old materials) Mercury (but still circulating) Other Pesticides Lead (larger concentrations – older development, flashing)
Multiple pollutants and sources requires comprehensive stormwater management
![Page 24: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/24.jpg)
www.geosyntec.com Effectiveness of Passive Treatment BMPs
![Page 25: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/25.jpg)
www.geosyntec.com
Impervious Surfaces Generate Stormwater Runoff
![Page 26: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/26.jpg)
www.geosyntec.com
![Page 27: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/27.jpg)
www.geosyntec.com
![Page 28: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/28.jpg)
www.geosyntec.com
![Page 29: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/29.jpg)
www.geosyntec.com
![Page 30: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/30.jpg)
www.geosyntec.com
“Volume” Control and “Retain-on-site” • Volume control is emerging as a required approach:
Municipal Stormwater Permits: Washington D.C., Orange County, CA, Ventura, CA, SF Bay area, San Diego, West Virginia Phase II, Oregon Draft MS4, BWSC, etc.
• EPA Headquarters and Regions are pursuing this approach
aggressively (EISA, section 438, stormwater rulemaking, TMDL memo etc.)
![Page 31: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/31.jpg)
www.geosyntec.com Surface Water vs. Groundwater (and Evapotranspiration!)
• Surface water regulators want to push stormwater into the ground as much as possible
• Groundwater regulators and users are concerned about this
Surface Water Regulators/NRDC
Groundwater Regulators / Water Agencies
Infil
tratio
n
Evapotranspiration
![Page 32: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/32.jpg)
www.geosyntec.com CSO’s Did You Know? • Stormwater runoff is the #1 source of pollution
to our rivers and streams Sediment Nutrients (phosphorus and nitrogen) Bacteria
• There are 772 Cities in the US with combined sewer outfalls (CSOs) After most rain events raw, untreated sewerage is discharged In NYC ¼” of precipitation triggers CSO events
![Page 33: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/33.jpg)
www.geosyntec.com New York City • Will spend $2 Billion on CSO Controls • Green Infrastructure is Included
Bioswales Blue Roofs CSO Volume Reduction - $187M to control 1” runoff on 1.5% of
impervious surfaces by Dec 31, 2015!
Boston as of January 1, 2013
• All permits to connect to the • BWSC sewer requires • retention of the first 1” of runoff
![Page 34: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/34.jpg)
www.geosyntec.com
Development increases stormwater volume, peak flow, and duration
Post Development Hydrograph Q= flow rate t= time
![Page 35: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/35.jpg)
www.geosyntec.com
www.epa.gov/owow/nps/lid/section438
New Federal Facility Stormwater requirements
![Page 36: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/36.jpg)
www.geosyntec.com
EISA Section 438
Text of Section 438:
“Storm water runoff requirements for federal development projects. The sponsor of any development or redevelopment project involving a Federal facility with a footprint that exceeds 5,000 square feet shall use site planning, design, construction, and maintenance strategies for the property to maintain or restore, to the maximum extent technically feasible, the predevelopment hydrology of the property with regard to the temperature, rate, volume, and duration of flow.”
![Page 37: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/37.jpg)
www.geosyntec.com Performance Options Option 1 : Control 95th Percentile
Rainfall Event • Manage rainfall onsite • Infiltrate, Evapotranspirate, Harvest and
Infiltrate, and Reuse Runoff Note: The 95th percentile rainfall event is the
event whose precipitation total is greater than or equal to 95 percent of all 24-hour storms on an annual basis.
![Page 38: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/38.jpg)
www.geosyntec.com 95% Storm Event
City 95th Percentile Event Rainfall Total (in) City
95th Percentile Event Rainfall Total (in)
Atlanta, GA 1.8 Kansas City, MO 1.7 Baltimore, MD 1.6 Knoxville, TN 1.5 Boston, MA 1.5 Louisville, KY 1.5
Buffalo, NY 1.1 Minneapolis, MN 1.4 Burlington, VT 1.1 New York, NY 1.7
Charleston, WV 1.2 Salt Lake City, UT 0.8
Coeur D’Alene, ID 0.7 Phoenix, AZ 1 Cincinnati, OH 1.5 Portland, OR 1 Columbus, OH 1.3 Seattle, WA 1.6 Concord, NH 1.3 Washington, DC 1.7 Denver, CO 1.1
![Page 39: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/39.jpg)
www.geosyntec.com
![Page 40: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/40.jpg)
www.geosyntec.com
Worst case cost 52,272 sq ft @ $15/sq ft = $784,080 Plus site demo, design, permits= ~$900k
![Page 41: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/41.jpg)
www.geosyntec.com Performance Options • Option 2: Preserve
predevelopment hydrology (rate, volume, duration & temperature) Conduct hydrologic and
hydraulic analyses Quantify post-construction
hydrographs for the following storm sizes:
• 1, 2, 10 and 100 year 24 hour storm events
Maintain pre-development hydrographs for these storm events
![Page 42: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/42.jpg)
www.geosyntec.com Performance Options
What if Options 1 and 2 are not technically feasible?
• Conduct site evaluation and assessment • If site conditions or other factors preclude
achievement of Options 1 or 2, i.e., neither is technically feasible
• Agency/Department follows a process to employ onsite practices to the METF
• Agency/Department documents stormwater design based on METF and other factors
![Page 43: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/43.jpg)
www.geosyntec.com
Era of the Big Basin – Gone! Stormwater management
designs that manage only peak discharge rates often exacerbate the problem.
Natural-based systems
respond to runoff volumes, frequencies, durations and temperatures as well.
![Page 44: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/44.jpg)
www.geosyntec.com Assessing Street Designs
http://www.epa.gov/ne/npdes/stormwater/ImperviousAssessment.pdf
New – April 2011
•Pavement widths •ROW widths •Building frontage •Turnarounds •Sidewalks •Driveways •Parking lot Standards
![Page 45: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/45.jpg)
www.geosyntec.com Impervious Area Assessment
http://www.epa.gov/ne/npdes/stormwater/ma/MADCIA.pdf
Step 1. Establish Baseline IA/DCIA (will be provided by EPA by subwatershed). Step 2. Annually Track Changes in IA and DCIA –at the development level by reviewing as-built site plans and calculating effectiveness of BMPs. Step 3. Starting in Year 2, Include a Summary of the Net Changes by subbasin in your annual report.
![Page 46: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/46.jpg)
www.geosyntec.com Stormwater Retrofits
http://www.epa.gov/ne/npdes/stormwater/BMPRetrofit.pdf
Permittees must:
•Implement BMPs as a part of your SWMP
•Look for retrofits on MS4-owned properties
•Retrofit MS4 properties
•Install controls at municipal facilities as a part of the SWPPP (each facility needs a SWPPP)
![Page 47: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/47.jpg)
www.geosyntec.com
Stormwater Management in New Development and Redevelopment -Highlights
• Identify areas > 1 acre impervious and retain first one (1) inch of rainfall from 24-hr storm
• Require submission of as-built plans and procedures for long-term O&M of BMPS
• Assess developments for LID Potential • Incorporate “green” • Estimate the IA and DCIA (directly connected impervious area) added or removed • Retrofit properties with BMPs and report
![Page 48: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/48.jpg)
www.geosyntec.com
New Federal Stormwater Regulations (Proposed – the 2013 Rule)
• EPA Proposed SW Rulemaking – Effective June 2013 New stormwater controls for “newly developed and
redeveloped sites” Likely to require retrofits to existing sites May apply everywhere – Currently 30% of the land
area in the US is within an MS4.
![Page 49: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/49.jpg)
www.geosyntec.com
Sustainable Stormwater Management • Low Impact Development Stormwater Designs Green roofs Trees and tree boxes Raingardens/bioretention/infiltration planters Vegetated swales Pocket wetlands Permeable pavements Reforestation/revegetation Site planning- protection of riparian
buffers/floodplains Rainwater harvesting/reuse (where allowed)
![Page 50: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/50.jpg)
www.geosyntec.com
![Page 51: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/51.jpg)
www.geosyntec.com
![Page 52: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/52.jpg)
www.geosyntec.com
![Page 53: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/53.jpg)
www.geosyntec.com
![Page 54: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/54.jpg)
www.geosyntec.com Blue Roofs- NYC Part of PLANYC Controls up to the 2” event
![Page 55: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/55.jpg)
www.geosyntec.com
45% reduction in outflow volume! Significant peak reduction
![Page 56: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/56.jpg)
www.geosyntec.com
Example from Sandy:
Advanced Rainwater Harvesting System, NC
![Page 57: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/57.jpg)
www.geosyntec.com Technology Application:
Advanced Rainwater Harvesting
Simplest Definition: Drain storage in advance of predicted rainfall or other trigger
![Page 58: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/58.jpg)
www.geosyntec.com Pilot System: NC State
Advanced Rainwater Harvesting
![Page 59: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/59.jpg)
www.geosyntec.com
Internet Gateway (Powered by ioBridge)
Automatic Drain Valve
Irrigation Pump Overflows from Tanks
Cisterns
Pilot System: NC State Advanced Rainwater Harvesting
![Page 60: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/60.jpg)
www.geosyntec.com Pilot System: NC State
Advanced Rainwater Harvesting
![Page 61: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/61.jpg)
www.geosyntec.com NC State Pilot – Dashboard (1-min refresh)
System Behavior Week of 4/5/2012 11:52 AM
![Page 62: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/62.jpg)
www.geosyntec.com NC State Pilot – Dashboard (1-min refresh)
System Behavior Week of 4/5/2012 2:06 PM
![Page 63: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/63.jpg)
www.geosyntec.com
![Page 64: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/64.jpg)
www.geosyntec.com Stream Daylighting (Long Lake, Littleton, MA)
![Page 65: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/65.jpg)
www.geosyntec.com Bioretention Cell (Hamilton Reservoir, Holland, MA)
![Page 66: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/66.jpg)
www.geosyntec.com Bioretention cell with overflow
![Page 67: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/67.jpg)
www.geosyntec.com 100 ft Linear Bioretention Cell in Beach Parking Lot
![Page 68: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/68.jpg)
www.geosyntec.com Raingarden/Bioretention Cell
![Page 69: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/69.jpg)
www.geosyntec.com Bioretention Cell (Dudley Pond, Wayland, MA)
![Page 70: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/70.jpg)
www.geosyntec.com Constructed Wetland with Sediment Forebay (Long Lake, Littleton, MA)
![Page 71: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/71.jpg)
www.geosyntec.com Planter Box for Roof Runoff (Plymouth, MA)
![Page 72: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/72.jpg)
www.geosyntec.com Tree Box Filter (bioretention)
![Page 73: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/73.jpg)
www.geosyntec.com Boat Ramp with Porous Pavers (Long Lake, Littleton, MA))
![Page 74: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/74.jpg)
www.geosyntec.com Gravel Pave™
![Page 75: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/75.jpg)
www.geosyntec.com Porous Pavements (Silver Lake, Wilmington MA)
• Interlocking Concrete Pavers • Porous Asphalt / Concrete • FlexiPave
![Page 76: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/76.jpg)
www.geosyntec.com
FlexiPave™ – recycled rubber tires and aggregate
![Page 77: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/77.jpg)
www.geosyntec.com
![Page 78: Climate Change and Stormwater Management – Lessons from ...files.ctctcdn.com/ea79051b001/808b31ba-a349-44d0-933f-8353033956f9.pdf · Climate Change and Stormwater Management –](https://reader031.fdocuments.us/reader031/viewer/2022040903/5e751d0ec69d47312e5ebc2e/html5/thumbnails/78.jpg)
www.geosyntec.com Questions?