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In order to comply with the Stage 2 Disinfectant/Disinfection Byproduct (D/DBP) Rule, an evaluation or study of disinfection byproduct (DBP) formation in the distribution system is required. This paper discusses two options, the first being an evaluation of DBP formation in the distribution system, called an Initial Distribution System Evaluation (IDSE), that requires that one year of paired total trihalomethane (TTHM) and the five haloacetic acid species (HAA5) samples be collected every other month at eight locations within the distribution system. Compliance sample sites are then selected based on the DBP results. The other option is to complete a System-Specific-Study (SSS). An SSS uses historical data, distribution system models or other methods to assess the distribution system and select representative sample locations. The IDSE or SSS is due two years after rule promulgation. IDSE requirements apply to all public water systems serving a population of

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Edition: Vol. - No. Published: 11/01/2002 Number of Pages: 12File Size: 1 file , 600 KB