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Acute Toxicity of Fire-Retardant and Foam-Suppressant Chemicals to Hyalella azteca (Saussure)

Table 3

Table 3. Formulation of field mixtures for five fire-fighting chemicals and the ratio of the mixture concentration to the acute toxicity value.

Chemical	Original units	Field mixture^a (mg/L)	Water type	Ratio to 96-h LC50^b
Fire-Trol GTS R	1.66 lb/gal	198,930	Soft	1,566
			Hard	548
Fire-Trol LCG-R	1 gal/4.5 gal	270,400	Soft	3,704
			Hard	505
Phos-Chek D75-F	1.20 lb/gal	143,800	Soft	2,713
			Hard	365
Phos-Chek WD-881	1%	10,000	Soft	1,000
			Hard	454
Silv-Ex	1%	10,000	Soft	417
			Hard	370
^aWeight or volume of the chemical concentrate combined with water to produce application mixture. ^bRatio: field mixture/mean lethal concentration (LC50) (mg/L).

U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/habitat/fireweb/hyalazte/table03.htm
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Page Last Modified: Thursday, 03-Aug-2006 11:39:25 EDT
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