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Construction Site Stormwater Runoff Review Texas Pollutant Discharge Elimination System (TPDES) General Permit TXR150000 This presentation is intended to aid in achieving compliance and should not be interpreted as a comprehensive compliance source.
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Construction Site Stormwater Runoff Review

Mar 13, 2016

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Construction Site Stormwater Runoff Review. Texas Pollutant Discharge Elimination System (TPDES) General Permit TXR150000 This presentation is intended to aid in achieving compliance and should not be interpreted as a comprehensive compliance source. What are we trying to prevent. - PowerPoint PPT Presentation
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Page 1: Construction Site Stormwater Runoff Review

Construction Site Stormwater Runoff Review

Texas Pollutant Discharge Elimination System (TPDES) General Permit TXR150000

This presentation is intended to aid in achieving compliance and should not be interpreted as a comprehensive compliance source.

Page 2: Construction Site Stormwater Runoff Review

What are we trying to prevent.

Page 3: Construction Site Stormwater Runoff Review

Stormwater History – Abilene

September 11, 1998 – EPA issues first MS4 permit to the City of Abilene.

August 23, 2003 - Stormwater Utility Division created following the July 2002 flood and EPA/TCEQ requirements.

April 17, 2006 – TCEQ issues permit to the City of Abilene. EPA permit no longer active.

Page 4: Construction Site Stormwater Runoff Review

What are the City’s requirements under the

MS4 permit? Monitor the use and maintenance of appropriate

structural and non-structural control measures. Inspect Construction sites and conduct

enforcement of control measures. Provide appropriate education and training. Notify building permit applicants of their potential

responsibilities under the TPDES permit.

Page 5: Construction Site Stormwater Runoff Review

Who is responsible for permit compliance?

Anyone with day-to-day operational control of activities at a construction site.

The person or persons that have operational control over construction plans and specifications.

Developers Builders Designers Contractors Sub-contractors

Page 6: Construction Site Stormwater Runoff Review

When is a construction site permit required?

Large Construction Activity (Submit NOI)Land disturbance of greater than 5 acres; or less than 5 acres but part of a larger plan of development.

– Sub-divisions– Strip malls

Small Construction Activity (Submit CSN)Land disturbance of greater than 1 acre and less than 5 acres; or less than 1 acre but part of a larger plan of development.

Page 7: Construction Site Stormwater Runoff Review

What are my requirements if I am subject to the stormwater permit?

Develop a Stormwater Pollution Prevention Plan (SWP3) according to the provisions of the General Permit (TXR150000).

Submit a Notice of Intent (NOI) to the City and TCEQ or Small Construction Site Notice (CSN) to the City.

Post copy of NOI and Large CSN or Small CSN at site visible to the public.

Implement SWP3 prior to beginning of construction activities.

Notice of Change (NOC)

Notice of Termination (NOT) – Site stabilization (70%)

Page 8: Construction Site Stormwater Runoff Review

Stormwater Pollution Prevention Plan (SWP3)

Completed prior to obtaining NOI/CSN. Implemented prior to construction activities. Updated/maintained as necessary (living

document). Must provide compliance with terms and

conditions of the general permit. Must be made available to inspectors.

Page 9: Construction Site Stormwater Runoff Review

SWP3 (cont’d) SWP3 must contain at a minimum:

Nature of construction activity and potential pollutant sources.

Intended schedule of major activities of soil disturbance.

Total number of acres of the entire property and disturbed area.

Name of receiving water bodies that will receive discharges.

Copy of the TPDES general permit TXR150000.

Page 10: Construction Site Stormwater Runoff Review

SWP3 Site Map Site map should illustrate the erosion/sediment controls; A map showing general location of site (city or county map); Drainage patterns and approximate slopes after major grading; Areas where soil disturbance will occur; Location of all major structural controls; Locations of off-site materials, waste, equipment storage areas; Surface waters, adjacent or in close proximity; and Locations where stormwater will discharge from the site to a

surface water body.

Page 11: Construction Site Stormwater Runoff Review

Notice of Intent (NOI) or Construction Site Notice

(CSN) The NOI is to be submitted to the MS4 operator

and TCEQ after development of the SWP3. The NOI has a $225 electronic/ $325 standard

mail fee to the TCEQ while the CSN is no charge.

The CSN is to be submitted to the City of Abilene Stormwater Utility Division only.

Both are to be posted on-site.

Page 12: Construction Site Stormwater Runoff Review
Page 13: Construction Site Stormwater Runoff Review
Page 14: Construction Site Stormwater Runoff Review

Implementation of SWP3 The SWP3 should be implemented prior to any

land disturbance. Erosion and Sediment controls in place. Changes can and should be made to the SWP3

at this time if implementation is modified from original plans.

Sediment Controls vs. Erosion Controls.

Page 15: Construction Site Stormwater Runoff Review

Silt Fence Silt fence is a good

option for sediment control but offers no stabilization for erosion control.

Must be installed correctly and maintained!

Page 16: Construction Site Stormwater Runoff Review

Good Silt Fence Installations

Page 17: Construction Site Stormwater Runoff Review

Bad Silt Fence Installations

Page 18: Construction Site Stormwater Runoff Review

Bad Silt Fence Placement

Page 19: Construction Site Stormwater Runoff Review

Good Silt Fence Placement

Page 20: Construction Site Stormwater Runoff Review

Mulch Socks Mulch sock is a good

option for sediment control but offers no stabilization for erosion control.

Also, must be installed correctly and maintained!

Page 21: Construction Site Stormwater Runoff Review

Mulch Sock Installations

Page 22: Construction Site Stormwater Runoff Review

Rip Rap Entrance Rip Rap or other entrance

control measures are required to keep dirt and other construction debris from entering the road, MS4, and waters of the U.S.

Should be marked on the Site Map and maintained.

Page 23: Construction Site Stormwater Runoff Review

Concrete/Paint Washout Pit

If disposal of concrete residual is to be discarded on-site, a concrete washout area should be designated and maintained.

Should be marked on the Site Map in the SWP3.

Page 24: Construction Site Stormwater Runoff Review

Erosion Control Mats Erosion control mats are

an efficient erosion control and stabilization measure.

Must be maintained!

Page 25: Construction Site Stormwater Runoff Review

Storm Drain Inlet Protection

Protection of a storm drain inlet is imperative since these lead straight to creeks.

Many different methods for protection of storm drains.

Page 26: Construction Site Stormwater Runoff Review

Storm Drain Inlet Protection

Page 27: Construction Site Stormwater Runoff Review

Sediment and Erosion Control Best Management

Practices Be Innovative If it doesn’t work, fix it. Use common sense for each site.

Keep dirt and construction debris out of the street, water conveyances, and waters of the U.S.

Page 28: Construction Site Stormwater Runoff Review

Site Stabilization Part of Post-Construction

permit requirements 70% stabilization Must inform new

responsible party of stabilization requirements.

Aesthetics!

Page 29: Construction Site Stormwater Runoff Review

Inspections Site is open to inspections

from the City, TCEQ, and/or the EPA.

City Ordinance will be used by inspectors for enforcement purposes.

Page 30: Construction Site Stormwater Runoff Review

Inspections by the City Inspections will be conducted by:

NOI/CSN submittalDrive by visual recognition ComplaintsAfter significant rain events.

Inspections will be conducted under the TCEQ General Permit regulations.

Page 31: Construction Site Stormwater Runoff Review

Inspections by the City Inspectors will be looking for:

NOI/CSN postingSite conditions as established by the SWP3.SWP3Erosion and Sediment control implementation and maintenance and whether they are effective.

– City will have the authority to request modifications or changes in BMP’s if not effective.

Page 32: Construction Site Stormwater Runoff Review

Inspection Enforcement The City will use the following schedule while

conducting inspections:Voluntary compliance

Stop Work orders

Monetary fines

Page 33: Construction Site Stormwater Runoff Review

5 Deadly Sins from the EPA

Dirt in the street Blowing trash Concrete/paint washout Leaks & Spills Poorly maintained BMP’s

Page 34: Construction Site Stormwater Runoff Review

Questions, comments, ideas?