Monitoring and Reporting Requirements in NPDES Permits
Monitoring and Reporting Requirements
Monitoring and Reporting
Requirements in NPDES Permits
Today's Speakers
David Hair Environmental Engineer US Environmental Protection Agency Washington, DC
Greg Currey Environmental Engineer Tetra Tech, Incorporated Fairfax, Virginia
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NPDES Web-based Training
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Monitoring and Reporting Requirements
Purpose of Monitoring
Determine compliance with permit conditions
Establish a basis for enforcement actions
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Approaches to Monitoring
Self-monitoring
? permittee performs sampling and analysis
Compliance monitoring
? permitting authority monitors effluent (during a compliance inspection)
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NPDES Web-based Training
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Monitoring and Reporting Requirements
Types of Monitoring
Influent Monitoring Effluent Monitoring Source Water Monitoring Internal Monitoring Ambient Monitoring Other Monitoring
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Self Monitoring Considerations
Location Frequency Type of Sample
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NPDES Web-based Training
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Monitoring and Reporting Requirements
Monitoring Location Example: POTW Flow Diagram
Raw Wastewater
Final Effluent
Primary Clarifiers
Aeration Basins
Secondary Clarifiers
Chlorine Contact Chambers
Gravity Thickeners
Belt Filter Presses
Incinerator
Ash to Sludge Lagoon
Water Solids
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Monitoring Location Example: Industrial Flow Diagram
Acid Waste Storage
ChromiumContaining
Wastes
Alkaline Wastes
Water Solids
Chromium Reduction
Neutralization
Cyanide Oxidation
Filter Process
Sludge to Landfill
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Clarification
Final Effluent
NPDES Web-based Training
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Monitoring and Reporting Requirements
Some Considerations for Monitoring Location
Is it on the facility's property? Is it accessible? Will the results be representative of
the targeted wastestream? Are internal monitoring points
needed?
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Monitoring Frequency Considerations
Federal requirements
? case-by-case...dependent on the nature and effect of the discharge
? annual minimum for all regulated pollutants
? waivers available for certain effluent guideline-based pollutants [40 CFR 122.44(a)(2)]
Permitting authority requirements
? consult policy and procedures
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NPDES Web-based Training
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