Emerging pollutants and attendant regulatory control requirements have resulted in the
need to install new treatment technologies that lack historical performance data. In order
for regulatory agencies to approve the design and installation of these new technologies,
manufacturers must be able to provide independent third-party verification of their
performance claims and the system design and installed system performance needs to be
validated through an approved field commissioning study.
In order to meet the control requirements specified for Cryptosporidium parvum in the
Stage 2 Long-Term Enhanced Surface Water Treatment Rule (LT2ESWTR) and the
disinfection byproduct reduction requirements of the Stage 2 Disinfectants and
Disinfection Byproducts Rule (DBPR), many water agencies have begun design and
construction of UV light facilities. Although UV light has been successfully used in
wastewater treatment facilities for the past fifteen years, new developments in lamp
technology and reactor design, and water quality differences between water and
wastewater prevent the translation of historical wastewater performance data to the
drinking water field. Therefore, these drinking water systems will require a significant
level of testing in order to demonstrate that they fulfill manufacturers' claims about dose
delivery, process control, system reliability, and long-term performance.
NSF International (NSF), in partnership with the United States Environmental Protection
Agency (USEPA) provides independent performance evaluations of drinking water
technologies through their Environmental Technology Verification (ETV) Program. The
purpose of this program is to accelerate a technology's entrance into the commercial
marketplace by providing consumers with verified results of product evaluations. This
program therefore functions as an independent third-party verification of manufacturer
performance claims. The USEPA is presently developing a UV Disinfection Guidance
Manual to provide assistance in the design, testing, and operation of UV systems for
compliance with drinking water disinfection requirements. Thus, the intent of the ETV
Program and the Guidance Manual appear to be complimentary. The ETV Program is
designed to serve as an independent third-party verification of manufacturer performance
claims while the USEPA Guidance Manual will provide the protocols for validation of
site-specific system design and installed system performance. This paper discusses how the detailed specifications of the ETV Program and the Guidance Manual were directly compared and modified for consistency and congruency.
Includes table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 320 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 5 |
| Published : | 11/01/2002 |
