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SE11" B'r Sur-,�st•_= Gold P 3_—_=—= D= <br /> CONCLUSIONS <br /> • Acute toxicity data for Br (tested as NaBr are available <br /> } <br /> for 10 species of freshwater organisms and cover the <br /> 8 family requirements necessary <br /> AwG?C; LC s ran a fro for establishing an <br /> so g m 2,030 to 24,000 mg/L Br. <br /> • Acute Br toxicity to aquatic organisms is similar to <br /> of chloride. The Final Acute Value for Br is 1 that <br /> Br; the Criteria Maximum Concentration 351 mg/� <br /> Br. Iron �s 680 mg/L <br /> • Chronic toxicity data for Br are available for 3 species. <br /> Chronic values (ChV) range from 1 .6 to 1 767 m <br /> Acute to chronic ratios (ACR) range g/� B <br /> and thus differ b ) 9 from 9.5 to 2,169 <br /> y more than 2 orders of magnitude. <br /> The geometric mean ACR is 209. <br /> • Insufficient data are available to assess Br toxicity <br /> aquatic plants or the bioaccumulative to <br /> potential of Br. <br /> • One of the established procedures for calculating <br /> AWQC calls forapplying the geometric tang an <br /> the FAV thereby <br /> 9 mean ACR to <br /> However, eby 'generating a protective criterion. <br /> based on the magnitude of the ACR <br /> differences determined in these studies such <br /> criterion for Br would neither be a a <br /> sufficiently protective. ppropriate nor <br />