26.11.16.09

.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