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USEPA Arsenic Technology Demonstration Program

Tom Sorg and Darren Lytle USEPA Cincinnati, OH ETC Brown Bag Seminar March 24, 2005 Cincinnati/DC. USEPA Arsenic Technology Demonstration Program. Arsenic Rule. Arsenic MCL was reduced from 50 ug/L to 10 µg/L Established by EPA in January of 2001 Compliance deadline - January 2006.

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USEPA Arsenic Technology Demonstration Program

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  1. Tom Sorg and Darren Lytle USEPA Cincinnati, OH ETC Brown Bag Seminar March 24, 2005 Cincinnati/DC USEPA Arsenic Technology Demonstration Program

  2. Arsenic Rule • Arsenic MCL was reduced from 50 ug/L to 10 µg/L • Established by EPA in January of 2001 • Compliance deadline - January 2006

  3. Arsenic Chemistry • Arsenic has two primary valence states: As (III) As 3+ Arsenite As (V) As 5+ Arsenate • Arsenic Occurrence by valence state • Surface waters - predominately As (V) • Ground waters – usually found as As (III), however, concentrations of As (V) or a combination of As (III) and As (V) can be found

  4. Arsenic Chemistry • Arsenic species- pH dependent As (III) - H3AsO30, H2AsO3-1, HAsO3-2 As (V) - H3AsO40, HAsO4-1,AsO4-2

  5. Arsenic Chemistry What is the significance of arsenic speciation? As (V) more effectively removed than As (III) by most treatment technologies

  6. Arsenic Chemistry • As III can be oxidized to As V by strong oxidants such as chlorine, ozone and potassium permanganate

  7. Arsenic Chemistry Oxidation of As III by aeration is NOT effective

  8. Arsenic Demonstration ProgramBackground • $20 million targeted to this effort ($12M EPA; $8M Congress) • Full-scale, long-term (1 year) in scope • Focused on commercially ready technologies or engineering approaches

  9. Goals of Demonstrations • Determine the construction costs/operational costs. • Determine performance of the new process. • Determine the operational and maintenance requirements. • Characterize the residuals produced by the process; quantity and chemical characteristics. • Evaluate effectiveness of residuals disposal process and/or the impact of residuals on existing disposal process.

  10. Two Year Program • Round 1 Demo Sites Funded - 12 projects • Round 2 Demo Sites Funded - 31 projects

  11. Round 1 – 12 Sites / 9 States

  12. Round 2 - 31 Sites / 19 States ME * * VT NH * * WA MA * NY * ND MT * MN RI CT * * OR * * WI * ID * MI NJ SD * * PA * CA WY * * NE * IA NV * DE OH * UT * IL CO IN MD * WV KS VA MO * KY * AZ NC * NM * TN OK AR SC * ** GA * AL MS LA TX * FL

  13. Funding Ground Rules • EPA Funds - Technology/System - Engineering/permitting - Installation - System operation for 1 year - Performance study costs • Utility Funds - New facilities - Waste disposal system - Operators

  14. Technologies Selected - Round 1 • New Technologies (11) 9 Adsorption media system 7 Iron Media, 1, Iron Based, 1 AA 1 Anion exchange system 1 Iron removal system • System Modification (1) Iron removal process – Fe addition

  15. Round 1 Arsenic Treatment Technology Demonstration Sites SiteTechnology to be Demonstrated Rimrock, AZ AdEdge Iron Media Valley Vista, AZ Kinetico Activated Alumina City of Fruitland, Fruitland, ID Kinetico Ion Exchange Queen Anne's Co, Stevensville, MD Severn Trent Iron Media Brown City, Brown City, MI Severn Trent Iron Media Town of Climax, Climax, MN Kinetico Oxid/CoPrecip/Filtration Lidgerwood, ND Kinetico Modified Treatment Bow, NH ADI Iron Adsorption Rollinsford, NH AdEdge Iron Media Desert Sands, Anthony, NM Severn Trent Iron Media Nambe Pueblo, NM AdEdge Iron Media South Truckee Meadows, Reno, NV US Filter Iron Media

  16. Round 2 Changes from Round 1 • Includes non-transient non-community water systems (NTNCWS) • Allows for demonstration of Point-of-Use/Point-of-Entry Approaches • Multi-contaminant treatment

  17. Round 2 - Sites 31 Sites to be funded States - 19 Sites per State - 1 to 3 CWS – 28 NTNCWS – 4 Multi contaminant sites – 4 (Uranium, radium, nitrate) Size – 7 gpm to 600 gpm

  18. Round 2 Demonstration Sites MW Breaux Bridge, LA Arnaudville, LA Stromsburg, NE** Lyman, NE Wellman, TX Alvin, TX Bruni, TX (7) Far West Susanville, CA Lake Isabella, CA Klamath Falls, OR Taos, NM Homedale, ID Okanogand, WA Three Forks, MT Techachapi, CA Tohono O’odham, AZ (Sells) Vale, OR (10) East Felton, DL N. Springfield, RI Goffstown, NH Dummerston, VT Wales, ME* (5) Central MW Sauk Centre, MN Sabin, MN* Stewart, MN Chateau Estates, OH Grove City, OH Buckeye Lake, OH Greenville, WI Sandusky, MI Pentwater, MI Delavan, WI (10) * System installed and operating. ** System withdrawn from demo program.

  19. Arsenic Demonstration Program Desert Sands MDWAC, Anthony, NM Adsorptive Media (E33) Treatment System

  20. Arsenic Demonstration Program Brown City, MI Adsorptive Media (E33) Treatment System

  21. Queen Ann’s County, MD Adsorptive Media (E33) Treatment System

  22. Climax, MN Iron Removal System

  23. Questions! Tom Sorg 513/ 569-7370 Arsenic web site http://www.epa.gov/ORD/NRMRL/arsenic/

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