Md. Code Regs. 26.11.16.09

Current through Register Vol. 51, No. 25, December 13, 2024

Section 26.11.16.09 - Levels Used to Review Ambient Impacts

A. Special Screening Levels (SSL) and Acceptable Ambient Levels (AAL).

CAS Number	Substance	Concentration (micrograms/ cubic meter)	Averaging Time	Type of Level
(1)	7664-41-7	Ammonia (a) (b)	300. 450.	8 hours 1 hour	AAL AAL
(2)	124-38-9	Carbon Dioxide (a) (b) (c) (d)	288,000. 2,088,000. 900,000. 2,700,000.	8 hours 1 hour 8 hours 1 hour	SSL SSL AAL AAL
(3)	10049-04-4	Chlorine Dioxide (a) (b)	5. 15.	8 hours 1 hour	AAL AAL
(4)	611-19-8	1-Chloro-2-(chloromethyl)-benzene (OCBC)	9.1	8 hours	SSL
(5)	81777-89-1	Dimethazone	27.4	8 hours	SSL
(6)	598-56-1	Dimethylethylamine	1.6	8 hours	SSL
(7)	75-00-3	Ethyl Chloride (a) (b)	2.6 13.	8 hours 1 hour	SSL SSL
(8)	107-44-8	GB (Sarin) (a) (b)	0.0003 0.04	8 hours 15 minutes	SSL SSL
(9)	96-64-0	GD (Soman) (a) (b)	0.003 0.012	8 hours 15 minutes	SSL SSL
(10)	7647-01-0	Hydrogen Chloride (a) (b)	7. 117.	Annual 1 hour	AAL AAL
(11)	541-25-3	L (Lewisite)	0.0004	15 minutes	SSL
(12)	74-87-3	Methyl Chloride (a) (b)	105. 525.	8 hours 1 hour	SSL SSL
(13)	50782-69-9	VX (Ethyl S-Dimethyl amino ethyl Methyl-phosphonothiolate) (a) (b)	0.0003 0.004	8 hours 15 minutes	SSL SSL
(14)	7733-02-0	Zinc Sulfate	18.8	8 hours	SSL