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Transcript of IDDE
dry weather containing pollutants and/or pathogens. 2. Each illicit discharge has a unique frequency, composition and mode of entry in the storm drain system. 3. Illicit discharges are frequently caused when the sewage disposal system interacts with the storm drain system. 4. Illicit discharges of other pollutants are produced from specific source areas and operations known as “generating sites.” Definition: Storm Drain: A storm drain can be either an enclosed pipe or an open channel. What is Stormwater Runoff? Definition Precipitation that flows over the ground, picking up debris, chemicals, dirt and other pollutants and carrying them into nearby waterways. Hotspot Produce higher levels of pollutants and/or present higher potential risk for spills, leaks, or illicit discharges Sediment
Toxics Hot Spot Pollutants Municipal Operations Public Works Yards
Water/Wastewater Treatment Facilities
Public Swimming Pools Dirt
Pesticides Why Do
We Care? What is an Illicit Discharge? What to do if you find one. Consequences. Presentation Overview You work in a. . . NPDES Phase II Permit issued July 2005
Federally Mandated Program stemming from Clean Water Act
Each City/Town has a Permit
Permit has 6 Minimum Measures
Public Education and Outreach
Public Involvement and Participation
Illicit Discharge Detection and Elimination (IDDE)
Construction Site Runoff Controls
Post-Construction Site Runoff Controls
Pollution Prevention and Good Housekeeping for Municipal Operations IDDE &
Pollution Prevention Why is it a big deal? Stormwater is precipitation (rain water) or irrigation water that runs over land and through storm drainage, eventually into a river, lake, or ocean. What is an Illicit Discharge? A discharge to an MS4 that is not composed entirely of storm water except permitted discharges and fire fighting related discharges. -Unique frequency, composition & mode of entry
-Interaction of the sewage disposal system & the storm drain system
-Produced from “generating sites” Water line flushing;
Diverted stream flows;
Rising ground waters;
Uncontaminated ground water infiltration (as defined at 40 CFR 35.2005(20));
Uncontaminated pumped ground water;
Discharges from potable water sources;
Air conditioning condensation;
Flows from emergency fire fighting
Water from crawl space pumps;
Individual residential car washing;
Flows from riparian habitats and wetlands;
Dechlorinated swimming pool discharges;
Street wash water; and
Other non-stormwater discharges for which a valid NPDES discharge permit has been approved and issued by the State of North Carolina. Along the same lines. . . Illicit Connections: Connections that allow the discharge of non-stormwater to storm sewer system
Waste water from washing machines or sanitary sewers,
Wash water from commercial vehicle washing or steam cleaning, and
Waste water from septic systems Permitted Discharges Spills Spills or leaks of polluting substances
Shall be contained, controlled, collected, and properly disposed.
All affected areas shall be restored to their pre-existing condition. Right of Entry Authority to inspect
Court ordered entry if necessary
Authority to sample and test Investigate
Contact Stormwater Administrator.
Use Stormwater Map to move upstream until you find the source of the discharge.
If needed, monitor and/or analyze substance entering stormwater.
Contact Property Owner
Explain problem with Illicit Discharges.
More Bees with Honey than with Vinegar.
Issue Notice of Violation
Depending on Severity of Discharge, various fines can be levied.
Fine is intended to cover administrative and remediation costs.
If violation is severe, municipality does have other ways to get the area cleaned up. If you come across an illicit discharge. . . Commercial Operations Gas stations
Automotive repair shops
Hotels Industrial Operations Vehicle/Equipment Storage and Maintenance Yards
Solid Waste Handling and Transfer Facilities
Other Industrial Sites Institutional Operations Golf Courses
Other Public Buildings Straight from the horses mouth. . . (Source: NC DWQ) Best Management Practices: Develop ordinance to prohibit illicit discharges
Map municipal separate storm sewer system
Establish an inspection program and coordinate with Haz Mat officials
Develop fact sheets for public education and distribute at City Hall and at the fire department
Coordinate with local health dept. on failing septic systems.
Conduct employee cross-training
Conduct dry weather flow testing
Report sanitary sewer overflows Current Efforts All Phase II Municipalities should now have a MS4 Map of their stormwater system
Annual training about what is and isn't an Illicit Discharge
Ordinance outlawing illicit discharges What's up with Nutrients? What Nutrients are we talking about?
Nitrogen and Phosphorous
Where do they come from?
Two of the three main ingredients in Fertilizer.
Aid Plant Growth.
Generally one bag of fertilizer per year for a standard yard provides more N and P than needed.
Further application introduces excess N and P into the environment.
Excess N and P either leaches into soil or runs off.
Runoff Nutrients are then dissolved into water and flow through streams, lakes, and ponds.
Algal Blooms and Fish Kills
Excess N and P in stormwater runoff lead to excess Algae growth called Algal Blooms.
Algal Blooms use up oxygen that fish need in the water.
Leading to Fish Kills.
Algae grows better in dark, nutrient rich waters. So, it's your responsibility? Many residents don't realize they're polluting. In fact, many residents don't realize the difference between sewer and storm drains. 1. Know your SOP! 2. Keep cleanup kits accessible! Really, there are only two things you need to know. Questions? Illegal dumping practices
Broken sanitary sewer lines
Connection of floor drains to storm sewer
Sanitary sewer overflows
Failing septic systems
Improper RV waste disposal
Pump station failure
Wash water flows
Landscape irrigation Common Illicit Discharges Mode of Entry Direct entry
Sewage, industrial, commercial cross-connection
Straight pipe Indirect entry
Outdoor washing activities
"Nuisance" or non-target water Other Bad Stuff. . . photos: Center for Watershed Protection Photo: CWP photo: Louisiana DEQ photo: CWP photo: CWP photo: CWP photo: CWP photo: CWP photo: CWP photo: Huffington Post photos: Kent County, Michigan photo: calvin.edu photo: City of Asheboro photo: CWP photo: CWP Photo: CWP photo: CWP photo: CWP photo: CWP photo: CWP photos: NC DWQ photos: NC DWQ photos: NC DWQ photos: NC DWQ photos: NC DWQ High Rock Lake
Nutrient Management The State of North Carolina Division of Water Quality (DWQ) periodically assesses the support of designated uses in waterbodies of the state in accordance with the Federal Clean Water Act.
High Rock Lake has designated uses of recreation and support of aquatic life, and is also protected for water supply.
The lake has been identified as failing to support its designated uses and is thus listed as being impaired(Clean Water Act Section 303(d) listings) due to elevated levels of turbidity, chlorophyll a