In 2001, the US Environmental Protection Agency (USEPA) published a revised maximum contaminant level (MCL) requiring
arsenic concentrations to be maintained below 10 ug/L in drinking water. The two
groundwater wells operated by the Walker River Paiute Tribe (Tribe) have arsenic levels
between 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 the
appropriate treatment technology.
The Tribe identified critical issues associated with meeting the revised MCL and
implemented the Arsenic Removal Technology Pilot Plant Study. For this study the
Tribe selected multiple technologies for evaluation of arsenic removal through bench-
and pilot-scale studies. Through a rigorous testing program, technologies are being
evaluated for their ability to: consistently reduce the arsenic concentration below 10
ug/L; expand easily through modular construction; incorporate continuous
advancements introduced into the market for arsenic removal; avoid the production of
hazardous wastes; and, eliminate excess wasted water. Finally, the selection of a
technology at the end of the pilot study for full-scale application must consider the
limited Tribal resources, operation and maintenance demands on the staff, and the natural aesthetics of the
Tribal lands. Includes table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 240 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 6 |
| Published : | 06/15/2003 |
