NDEQ Industrial Storm Water General Discharge Permit Presentation for: Nebraska Aviation Symposium...
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![Page 1: NDEQ Industrial Storm Water General Discharge Permit Presentation for: Nebraska Aviation Symposium January 27, 2011 By: Bill Imig, Environmental Scientist.](https://reader035.fdocuments.net/reader035/viewer/2022070306/551662d2550346a2698b5240/html5/thumbnails/1.jpg)
NDEQ Industrial Storm Water
General Discharge PermitPresentation for: Nebraska Aviation Symposium
January 27, 2011
By: Bill Imig, Environmental Scientist – Olsson Associates
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Permit Applicability
• Sector S- Air Transportation Facilities
• SIC codes 4512-4581
451 Air Transportation, Scheduled, and Air Courier Services
4512 Air Transportation, Scheduled
4513 Air Courier Service
4522 Air Transportation, Non-scheduled
4581 Airports, Flying Fields, and Airport Terminal Services
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Covered ActivitiesStorm water discharges from those portions of the air
transportation facility that are involved in: • Aircraft maintenance – includes rehabilitation, mechanical
repairs, painting, fueling• Equipment cleaning• Deicing operations
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Activities Not Allowed under the Permit
• Discharges of wash water
• Discharges of deicing chemicals during dry weather
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No Exposure Certification• All industrial materials and activities are protected from
exposure to rain, snow, or runoff• Industrial materials or activities include:
– Material handling equipment– Industrial machinery– Raw Materials– Products (Fuel, Oil, etc)– Waste Products
• Exceptions– Drums, Barrels, Tanks that are sealed and not leaking– Adequately maintained vehicles used for material handling
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No Exposure Checklist• Using, storing or cleaning industrial machinery or
equipment or areas where residuals from industrial machinery or equipment remain and are exposed to storm water
• Materials or residuals from spills exposed to storm water• Materials or products from past industrial activities• Material handling equipment (except adequately
maintained vehicles)• Materials or products during loading/unloading or
transporting activities
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No Exposure Checklist• Materials or products stored outdoors (except products
intended for outdoor use where exposure to storm water does not result in discharge of pollutants
• Materials contained in open, deteriorated or leaking storage drums, barrels, tanks and similar containers
• Materials or products handled/stored on roads or railways owned or maintained by the permittee
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No Exposure Checklist• Waste materials (except waste in covered, non-leaking
containers (dumpsters)
• Application or disposal of process wastewater
• Particulate matter or visible deposits of residuals from roof stacks and or vents not otherwise regulated (under an air quality permit) and evident in storm water
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2011 Draft Permit
• Replaces existing permit first issued 1997
• NDEQ will hold a public hearing February 22, 2011
• Final permit target date is April 1, 2011
• Most Significant Changes– T&E Species Impact Evaluation for New or Expanded
Dischargers– Impaired Waters, Class A, Class B– Discharge Monitoring (Visual and Benchmark)
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Implementation Timeline
Will be pushed back pending issuance of the permit
Source: NDEQ
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Limitations on Coverage
• Non-storm water discharges
• T&E Species and Critical Habitat Protection
• New or Expanded discharges to Impaired Waters, Class A
and B Resource Waters, Drinking Water Supplies
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Allowable Non-Storm Water • Allowable non-storm water discharges
– Fire fighting– Fire suppression system flushing– Potable water line flushing except chlorination– Condensate from air conditioners, coolers, etc.– Irrigation drainage from agricultural lands– Landscape irrigation w/ approved application of fertilizer, etc.– External building wash down without detergents– Groundwater and spring water– Foundation drains if not contaminated with process water– Windblown mist from cooling towers
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T&E Species Evaluation
• If you are a new or expanded discharger coverage
under general permit is only available if storm
water does not adversely impact listed species and
habitat.
• NDEQ has prepared a 9 point checklist to
determine if discharge has potential to impact
T and E Species.
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Impaired, Class A &B, and Drinking Water Supply
• New or Expanded Discharge to Impaired Water
– Meet TMDLs if established
• New or Expanded discharge to class A – not eligible under the general
permit
• New or Expanded discharge to class B – prior written approval from
NDEQ
• New or Expanded discharge to Drinking Water – prior written approval
from NDEQ
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Source: NDEQ
Impaired Waters
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Class A & B State Resource Waters and Drinking Water
Source: NDEQ
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Benchmark Monitoring
• Deicing Season- Collect samples during timeframe under which deicing activities occur (usually October – April)• At all Outfalls that collect runoff from deicing areas• Collect 4 separate samples during deicing season
Source: NDEQ
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Benchmark Monitoring Results
• If average of first 4 values < benchmark – done sampling
for permit term
• If average > benchmark need to reevaluate BMPs &
controls. Make revisions and continue monitoring
• Or determine no further reductions are economically
practicable or achievable and notify NDEQ
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Contents of SWPPP
• Pollution Prevention Team
• Site Description – locations, activities, drainage, outfalls, etc.
• Site Map – submit copy to NDEQ with NOI
• Identify Potential Pollutants – Materials storage, Operational
Activities that are exposed to storm water
• Control Measures
• Schedules and Procedures
• Documentation
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Schedules and Procedures - Controls
• Good housekeeping schedule
• Maintenance procedures schedule
• Spill prevention and response
• Training
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Schedules and Procedures – Monitoring and Inspections
• Benchmark Monitoring – Seasonal during deicing operations
• Visual Assessment of Storm Water discharge– At least Quarterly
• Routine Inspections – Monthly during deicing season (usually
October – April)
• Comprehensive Inspection – Annual (during periods of deicing
operations if possible)
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Documentation• T&E species evaluation
• Discharge to Impaired or State Resource Water
authorization
• NOI
• NDEQ acknowledgment letter
• Best Management Practices
• Inspections
• Reports
• Corrective Action
• Monitoring Results (visual , benchmark)
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Reporting• Non-compliance which may endanger health or
environment within 24-hours.
• Corrective Action – record within 24 hours, document
actions within 14 days, report to NDEQ in 30 days
• Spill / Release reporting (per Title 126, Ch. 18)
• Upon NDEQ request
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Questions?