SMITH, David B., U.S. Geological Survey, MS 973, Denver Federal Center, Denver, CO 80225, dsmith@usgs.gov, dsmith@usgs.gov

YANG, Qiang, Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, NY 10964, MARVINNEY, Robert G., Maine Geological Survey, 93 State House Station, Augusta, ME 04333-0093, LOCKE, Daniel, Maine Geological Survey, 22 State House Station, Augusta, ME 04333, LOISELLE, Marc C., Maine Geological Survey, 22 State House Station, Augusta, ME 04333-0022, CULBERTSON, Charles, Maine Water Science Center, USGS, 196 Whitten Rd, Augusta, ME 04330 and ZHENG, Yan, Queens College, CUNY, Flushing, NY 11367, and Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, qyang@ldeo.columbia.edu, qyang@ldeo.columbia.edu

O'SHEA, Bethany¹, BROCK, Patrick², MARVINNEY, Robert³, BOSTICK, Benjamin C.⁴ and ZHENG, Yan⁴, (1)Environmental and Ocean Sciences, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, (2)Earth and Environmental Sciences, Queens College and Graduate Center, CUNY, 65-30 Kissena Blvd, Flushing, NY 11367, (3)Maine Geological Survey, 22 State House Station, Augusta, ME 04333, (4)Lamont-Doherty Earth Observatory, Columbia University, P.O. Box 1000, 61 Route 9W, Palisades, NY 10964, bethoshea@sandiego.edu, bethoshea@sandiego.edu

KIPP, Gregory G., Geochemistry, Geomega, 2525 28th Avenue, Suite #200, Boulder, CO 80301, STONE, James, Department of Civil and Environmental Engineering, South Dakota School of Mines and Technology, 501 E. Saint Joseph St, Rapid City, SD 57701 and LARSON, Lance, Dept of Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, gregorykipp@aol.com, gregorykipp@aol.com

DRYSDALE, Jessica A.¹, JAMIESON, Heather E.¹ and FORTIN, Danielle², (1)Department of Geological Sciences and Geological Engineering, Queen's University, Kingston, ON K7L 3N6, Canada, (2)Department of Earth Sciences, University of Ottawa, Advanced Research Complex, Ottawa, ON K1N 6N5, Canada, Jessica.Drysdale@queensu.ca, Jessica.Drysdale@queensu.ca

OYEWUMI, Oluyinka, Department of Earth & Atmospheric Sciences, SUNY College at Oneonta, 209 Science Building 1, Oneonta, NY 13820 and SCHREIBER, Madeline, Department of Geosciences, Virginia Polytechnic Institute and State University, Derring Hall 4044, Blacksburg, VA 24061-0420, oyewumo@oneonta.edu, oyewumo@oneonta.edu

ORMACHEA MUÑOZ, Mauricio¹, BHATTACHARYA, Prosun², THUNVIK, Roger² and QUINTANILLA, Jorge³, (1)KTH-International Groundwater Arsenic Research Group, Dept of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, Teknikringen 76, Stockholm, SE-10044, Sweden, (2)KTH-International Groundwater Arsenic Research Group, Department of Land and Water Resources Engineering, Royal Institute of Technology (KTH), Teknikringen 76, Stockholm, SE-10044, Sweden, (3)Instituto de Investigaciones Químicas, Universidad Mayor de San Andrés, Campus Universitario, Calle 27, Cota Cota, La Paz, 303, Bolivia, ormachea@kth.se, ormachea@kth.se

NEKU, Amar and BRIKOWSKI, Tom, Geosciences, University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080, amar.neku@utdallas.edu, amar.neku@utdallas.edu

BISWAS, Ashis¹, HALDER, Dipti¹, NEIDHARDT, Herald², BHOWMICK, Subhamoy¹, MAJUMDER, Santanu¹, SAHA, Debasree¹, BHATTACHARYA, Prosun³, BERNER, Zsolt⁴ and CHATTERJEE, Debashis¹, (1)Department of Chemistry, University of Kalyani, Kalyani, 741235, India, (2)Institute for Mineralogy and Geochemistry, Karlsruhe Institute of Technology (KIT), Adenauerring 20b, Geb. 50.40, Karlsruhe, D-76131, Germany, (3)KTH-International Groundwater Arsenic Research Group, Department of Land and Water Resources Engineering, Royal Institute of Technology (KTH), Teknikringen 76, Stockholm, SE-10044, Sweden, (4)Institute of Mineralogy and Geochemistry, Karlsruhe Institute of Technology (KIT), Adenauerring 20b, Geb. 50.40, Karlsruhe, D-76131, Germany, ashischemistry@yahoo.co.in, ashischemistry@yahoo.co.in

MUKHERJEE, Abhijit, Department of Geology and Geophysics, Indian Institute of Technology (IIT), Kharagpur, 721302, India, FRYAR, Alan E., Earth & Environmental Sciences, University of Kentucky, 101 Slone Building, Lexington, KY 40506-0053 and BHATTACHARYA, Prosun, KTH-International Groundwater Arsenic Research Group, Department of Land and Water Resources Engineering, Royal Institute of Technology (KTH), Teknikringen 76, Stockholm, SE-10044, Sweden, alan.fryar@uky.edu, alan.fryar@uky.edu

ALAGAPPAN, Ramanathan, School of Environmental Sciences, JNU, Jawharlal nehru University, School of Environmental Sciences,Jawharlal Nehru University , New Meharauli Road, New Delhi-110067, SW-1, wardens flat, sutlej hostel, JNU, New Delhi, 110067, India, PANKAJ, Kumar, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba City, 305-8572, India, KUMAR, Manish, Department of Urban Engineering, The University of Tokyo, Tokyo, 113-8656 and BHATTACHARYA, Prosun, KTH-International Groundwater Arsenic Research Group, Department of Land and Water Resources Engineering, Royal Institute of Technology (KTH), Teknikringen 76, Stockholm, SE-10044, Sweden, alrjnu@gmail.com, alrjnu@gmail.com

DATTA, Saugata¹, JOHANNESSON, Karen², NEAL, Andrew³, HAUG, Jade², SOCKI, Richard A.⁴ and OCHELTREE, Troy⁵, (1)Department of Geology, Kansas State University, 104 Thompson Hall, Manhattan, KS 66506-3201, (2)Department of Earth and Environmental Sciences, Tulane University, 101 Blessey Hall, New Orleans, LA 70118-5698, (3)Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, VA 24061, (4)Astromaterials Research & Exploration Sciences, NASA-Johnson Space Center, ESCG, Houston, TX 77058, (5)Division of Biology, Kansas State University, 116 Ackert Hall, Manhattan, KS 66506, sdatta@ksu.edu, sdatta@ksu.edu

NEAL, Andrew¹, HAUG, Jade², SOCKI, Richard A.³, OCHELTREE, Troy⁴, PETROSKE, Elizabeth⁵, JOHANNESSON, Karen², DHAR, Ratan⁶ and DATTA, Saugata⁷, (1)Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, VA 24061, (2)Department of Earth and Environmental Sciences, Tulane University, 101 Blessey Hall, New Orleans, LA 70118-5698, (3)Astromaterials Research & Exploration Sciences, NASA-Johnson Space Center, Houston, TX 77058, (4)Division of Biology, Kansas State University, 116 Ackert Hall, Manhattan, KS 66506, (5)Kansas Geological Survey, University of Kansas, 1930 Constant Ave, Lawrence, KS 66047, (6)Earth and Physical Sciences, York College of the City University of New York, 94-20, Guy R. Brewer Blvd, Jamaica, NY 11451, (7)Department of Geology, Kansas State University, 104 Thompson Hall, Manhattan, KS 66506-3201, nealwiser@gmail.com, nealwiser@gmail.com

DHAR, Ratan, Earth and Physical Sciences, York College of the City University of New York, 94-20, Guy R. Brewer Blvd, Jamaica, NY 11451, RILEY, Avanel, Earth Science Teaching Program, American Museum of Natural History, New York, Central Park W & 79th St, New York, NY 10024, NEAL, Andrew, Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, VA 24061 and DATTA, Saugata, Department of Geology, Kansas State University, 104 Thompson Hall, Manhattan, KS 66506, rdhar@york.cuny.edu, rdhar@york.cuny.edu