AWWA ACE58259

In 2001, the US Environmental Protection Agency (USEPA) published a revised maximum contaminant level (MCL) requiringarsenic concentrations to be maintained below 10 ug/L in drinking water. The twogroundwater wells operated by the Walker River Paiute Tribe (Tribe) have arsenic levelsbetween 70 and 110 ug/L. In addition to arsenic, significant levels of silica (55 mg/L)and an "elevated" pH (8.4) are present that must be addressed when selecting theappropriate treatment technology.The Tribe identified critical issues associated with meeting the revised MCL andimplemented the Arsenic Removal Technology Pilot Plant Study. For this study theTribe selected multiple technologies for evaluation of arsenic removal through bench-and pilot-scale studies. Through a rigorous testing program, technologies are beingevaluated for their ability to: consistently reduce the arsenic concentration below 10ug/L; expand easily through modular construction; incorporate continuousadvancements introduced into the market for arsenic removal; avoid the production ofhazardous wastes; and, eliminate excess wasted water. Finally, the selection of atechnology at the end of the pilot study for full-scale application must consider thelimited Tribal resources, operation and maintenance demands on the staff, and the natural aesthetics of theTribal lands. Includes table, figures.

Product Details

Edition:

Vol. - No.

Published:

06/15/2003

Number of Pages:

6

File Size:

1 file , 240 KB