Code of Federal Regulations > Title 40 > Chapter I > Part 118 > Appendix Appendix B - Appendix B to Part 118—Toxicity Endpoints for Calculating Planning Distance for Fish, Wildlife and Sensitive Environments and Public Receptors

Regulations last checked for updates: Oct 17, 2024

Title 40 - Protection of Environment last revised: Oct 15, 2024

Appendix Appendix B - Appendix B to Part 118—Toxicity Endpoints for Calculating Planning Distance for Fish, Wildlife and Sensitive Environments and Public Receptors

Category	RQ (lbs.)	Endpoints for public receptors LD50			Endpoints for fish, wildlife and sensitive environments using 96-hour LC50
		Mammalian toxicity (oral) (mg/kg)		10% (mg/kg)	Aquatic toxicity (mg/liter)		10% (mg/L)
		Lower	Upper	10% (mg/kg)	Lower	Upper	10% (mg/L)
X	1	0	0.1	0.01	0	0.1	0.01
A	10	0.1	1	0.1	0.1	1	0.1
B	100	1	10	1	1	10	1
C	1,000	10	100	10	10	100	10
D	5,000	100	500	50	100	500	50

authority: 33 U.S.C. 1251

source: 89 FR 21955, Mar. 28, 2024, unless otherwise noted.