The proposed and final versions of the Long-term 2 Enhanced
Surface Water Treatment Rule (LT2ESWTR) have not been
published, but water suppliers are already gearing up for the
challenges of compliance with the rule. This article discusses
LT2ESWTR regulations in terms of their effect and implication for
a surface water treatment plant.
A case study applied the expected requirements of the
LT2ESWTR to the Richmond (Va.) Water Treatment Plant (RWTP).
The components of the microbial toolbox were analyzed in terms
of cost, feasibility, and applicability to the Richmond facility. For
RWPP, the most feasible and cost-effective toolbox alternatives
available were: a 0.5-log credit for a watershed control program;
a 0.5-log combined filter effluent turbidity credit; a
1.0-log demonstration of performance credit using full-scale
aerobic spore monitoring or pilot-scale microbial challenge studies;
and, inactivation with ultraviolet light.
Although this study is specific to Richmond, the findings
can be used by other utilities facing similar situations with
similar alternatives available to them resulting from application
of the microbial toolbox. An Expanded Summary in this issue
offers a condensed review of study findings; a full discussion
of the study results can be found online at
www.awwa.org/communications/journal/2003/
september.
| Edition : | Vol. 95 - No. 9 |
| File Size : | 1
file
, 500 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Published : | 09/01/2003 |
