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This article discusses how early indications from the US Environmental Protection Agency (USEPA) indicate that robust new occurrence data collected by water suppliers under the Unregulated Contaminant Monitoring Rule (UCMR) will likely justify not regulating at least five targeted chemicals. As USEPA officials explained during themeeting, their approach for evaluating which, ifany, Contaminate Candidate List (CCL2) contaminants ultimately qualify for afinal regulatory determination requires theagency to establish a potential health referencelevel (HRL) and a known or likely level andfrequency of occurrence for each, noting thatthe law requires no fewer than five to beconsidered in each RD cycle. USEPA's health and occurrence findings on the14 contaminants it is evaluating as potential regulatory determination(RD2) candidates are briefly summarized in this article. The 14 contaminants include: 1,1,2,2-Tetrachloroethane; 1,3-Dichloropropene; 2,4- and 2,6-Dinitrotoluene (DNT); Boron; DCPA degradates; DDE; DPTC; Fonofos; Metolachlor; MTBE; Perchlorate; and, Terbacil. Includes tables.

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Edition: Vol. 96 - No. 11 Published: 11/01/2004 Number of Pages: 7File Size: 1 file , 130 KB