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General Permit for Water Plant Discharges

General Permit for Water Plant Discharges. 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

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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

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