General Permit for Water Plant Discharges - PowerPoint PPT Presentation

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General Permit for Water Plant Discharges

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  1. General PermitforWater Plant Discharges

  2. Eligibility • May cover all new and existing point source discharges of backwash, sedimentation washdown, and decant water from water treatment plants (or other covered activities) • Discharges from water treatment plants • Does not authorize discharges that are mixed with other wastewater discharge

  3. Types of Discharges Covered • Aluminum based coagulants • Iron based coagulants • Polymer based coagulants • Ion exchange • Reverse Osmosis • Activities associated with the operation and maintenance of water treatment facilities

  4. Limitations on Coverage • Not authorized to discharge • Discharges mixed with other discharges and process wastewater • Discharges subject to an existing effluent limitation • Discharges subject to an existing NPDES permit • Discharges for waters other than those described • Discharges to receiving waters that are not Freshwater or Saltwater • Discharges that the Department has determined may be reasonably expected to violate a water quality standard • Discharges that would adversely affect a listed endangered or threatened species or its critical habitat

  5. Authorization • Water Treatment Plant Dischargers • Must submit timely, appropriate reapplications • Submit a Notice of Intent (NOI) • For which an individual permit application has been submitted • Unless notified by the Department • The Department may deny coverage

  6. Notice of Intent (NOI) • Name, Mailing address, location of Facility and Outfall • 4-digit SIC (Standard Industrial Classification) code • Operator’s name, address, telephone number • Additional NPDES permit numbers • Name of receiving waters • Quantity and quality • Easements • Map

  7. Aluminum based coagulants to FW Aluminum based coagulants to FW* (site-specific) Aluminum based coagulants to Saltwaters Iron based coagulants to FW Iron based coagulants to FW* (site-specific) Iron based to Saltwaters Polymer based coagulants to FW Polymer based coagulants to FW* Polymer based coagulants to Saltwaters Effluent Limitations

  8. Effluent Limitations – cont. • Ion Exchange to FW • Ion Exchange to FW* • Ion Exchange to Saltwaters • Reverse Osmosis to FW • Reverse Osmosis to FW* • Reverse Osmosis to Saltwaters

  9. Effluent Limitations – cont. • Toxicity Limitations for FW discharges • Toxicity Limitations for SW discharges

  10. Toxicity Testing http://www.epa.gov/waterscience/methods/wet/

  11. Turbidity Testing • Freshwater Reporting limitation of 50 NTU • Saltwater Reporting limitation of 25 NTU

  12. Comments received • Monitoring Frequency • Coagulant Type • Compliance Schedule • TRC detection limit • pH limits • Turbidity • Toxicity • Flow Measurement • Spreadsheet

  13. Summary/Closing