Full Description

The U.S. Environmental Protection Agency (USEPA) Stage 2 Disinfectants and Disinfection Byproducts Rule (Stage 2 DBP Rule) mandates that a utility maintain a maximumcontaminant level (MCL) for total trihalomethanes (TTHMs) at 80 parts per billion (ppb) and 60 ppb forhaloacetic acid (HAA) at designated sampling sites. The Birmingham Water Works Board(BWWB) has set a goal of 80 percent of the MCL's (64 ppb for TTHM, 48 ppb forHAA) for each Stage 2 site locational running annual average (LRAA). For thepurpose of this study, the goal of 80 percent of the MCL was applied to thesesample locations.To comply with the Stage 2 DBP Rule, water providers identified the locationswith high DBP concentrations in their distribution systems (EPA 2003). Theselocations will become compliance monitoring sites (EPA 2003). DBPs will becalculated for each monitoring location in the distribution system using a methodknown as locational running annual average (LRAA) (EPA 2003).The BWWB is taking a proactive approach in anticipating the impending, stricterStage 2 DBP Rule requirements. The BWWB has implemented over twentystudies involving DBP compliance. This study examines potential DBP formationin finished water storage tanks. It is widely assumed that tank mixing enhances water quality, and slows the creation of DBPs. The BWWB is conducting a study, which examines thecorrelation between mixing and water age to DBP formation. Includes 4 references, tables, figures.

Product Details

Edition: Vol. - No. Published: 11/01/2009 Number of Pages: 17File Size: 1 file , 1.2 MB