The document discusses best practices for avoiding pitfalls in stormwater management, emphasizing the importance of understanding permit requirements and implementing effective management strategies. It outlines specific regulations, types of facilities that require permits, and the need for proper documentation and training to ensure compliance. The content also highlights the necessity of regular inspections and maintenance to adhere to stormwater pollution prevention plans.

1. Midwest Environmental Compliance Conference
May 14, 2015
avoiding stormwater pitfalls
Photo courtesy abc news

2. stormwater – sweet dreams or …..

3. …a nightmare

4. how do I avoid pitfalls?
• plan
− understand what’s required (aka know the permit requirements)
− be familiar with the discharge scenario
− know your effluent limits
− implement appropriate best management practices
 consider green infrastructure
• inspect/sampling
• training
• document
• maintain

5. stormwater 101 – what’s required
• 40 CFR 122.21, duty to apply
• 40 CFR 122.26, discharges that require a NPDES permit
• associated with a permit issued prior to February 4, 1987
•industrial activity
• large municipal separate storm sewer system (MS4)
• medium MS4
• discharges that contribute to a violation of the water
quality standards or is a significant contributor of
pollutants to water of the US (e.g. small MS4)

6. industrial activity – types of facilities*
40 CFR 122.26(b)(14)
− stormwater effluent limitation guidelines (ELG)
− standard industrial classification (SIC) codes (29 industry sectors)
− hazardous waste treatment, storage, and disposal facilities
(TSDFs)
− landfills, land application sites
− recycling facilities (e.g. metal scrapyards, battery reclaimers)
− steam electric power generating facilities
− transportation facilities
− domestic wastewater treatment facilities (>1MGD)
− construction sites
*caveats related to mining and oil & gas facilities

7. pitfall
• ensure that your facility is correctly identified
(SIC code) and make a determination prior to
submitting a permit application
• identify all pertinent information on the permit
application
• Example
petroleum pipeline stations vs. bulk terminals
122.26(a)(2)(ii) vs. SIC code 5171

8. permitting
• site specific permit
• general permit – state or EPA multi-sector
general permit (MSGP)
http://water.epa.gov/polwaste/npdes/stormwater/
EPA-Multi-Sector-General-Permit-MSGP.cfm

9. permitting effluent limits
• conventional effluent limits – 40 CFR 122.44
− technology vs. water quality based
• benchmark/best management practices – 40
CFR 122.44(k)
− MSGP – industry sector specific benchmarks
− site specific benchmarks for site specific permits

10. alternatives to permitting
• Conditional no-exposure certification [40 CFR
122.26(g)]
− renewed every 5 years
− issued on a facility-wide basis
− updated with changing site conditions
http://water.epa.gov/polwaste/npdes/stormwater/
Conditional-No-Exposure-Exclusion.cfm

11. • Ensure that the effluent
limits are appropriate for
the discharge scenario
• Example – pH
(technology vs. water
quality based)
6 – 9 vs. 6.5 - 9
pitfall

12. best management practices
Definition:
Structural and non-structural controls or measures used
to reduce pollutants in stormwater runoff

13. bmp performance – planning and design
considerations
Three keys to bmp performance
− concentration (includes benchmark discharge goal)
 benchmarks
•numeric criteria to assist with the assessment of bmp
performance
•assess compliance with water quality criteria
− volume
− total load (understand the pollutants)
http://water.epa.gov/polwaste/npdes/stormwater/Three-Keys-to-
BMP-Performance.cfm

14. stormwater master planning

15. stormwater pollution
prevention plan (SWPPP)
 Structural BMP
• grit trap, tree trenches,
porous pavers, rain garden,
vegetated swale
 Non-structural BMP
• street-sweeping
• nutrient management plan
• de-icing plan
http://www.epa.gov/npdes/pubs/indust
rial_swppp_guide.pdf
bmp – plan/implement/comply

16. bmp implementation/compliance
stormwater pollution prevention plan
• inspections
− purpose
 assess effectiveness
 determine if maintenance is needed
− frequency
 routine (quarterly, annual)
 post-rainfall events

17. bmp implementation/compliance
stormwater pollution prevention plan
• inspections
− documentation
 inspection log
 deficiencies
 repairs/return to compliance
− follow-up and notification to the agencies of
performance/repairs/non-compliance

18. bmp implementation/compliance
stormwater pollution prevention plan
• sample collection/analytical parameters
− frequency (when to sample)
− containers, hold times, CoC, analytical method
− flow rate vs volume
• training
− documentation

19. pitfall - maintenance
Photo courtesy Phil Walsack, MPUA

20. • procrastinate – wait until a
crisis
• overcoming procrastination
− plan
− budget
− track inspection deficiencies
and return to compliance
− follow-up
− document
routine maintenance

21. avoiding pitfalls
• plan
− understand the permit requirements
− be familiar with the discharge scenario
− know your effluent limits
− implement appropriate best management practices
 consider green infrastructure
• inspect/sampling
• training
• document
• maintain

22. Questions, Thanks & Contact Info
Rob Morrison, P.E.
Barr Engineering Co.
1001 Diamond Ridge, Suite 1100
Jefferson City, MO
573-638-5025
rmorrison@barr.com
May 13, 2015