API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

RISK-BASED INSPECTION METHODOLOGY, PART 3—CONSEQUENCE OF FAILURE METHODOLOGY 3-65
Table 4.14—Toxic Impact Criteria for Toxic Chemicals
Toxic Component
Probit Parameters
A B N
IDLH
(ppm)
AEGL3-10
(ppm)
AEGL3-30
(ppm)
AEGL3-60
(ppm)
EPA Toxic
Endpoint
(mg/L)
ERPG-
3
Acrolein −9.93 2.05 1.00 2 — — — 0.50 —
Acrylonitrile −29.42 3.01 1.43 85 — — — 0.08 75
Aluminum trichloride −14.65 2.00 1.00 — — — — — —
Ammonia −35.90 1.85 2.00 10 — — — 0.14 750
Benzene −109.8 5.30 2.00 500 — — — 1,000
Bromine −9.04 0.92 2.00 3 — — — 0.01 5
Carbon monoxide −37.98 3.70 1.00 1,200 1,700 600 330 — 500
Carbon tetrachloride −6.29 0.41 2.50 200 — — — — 750
Chlorine −8.29 0.92 2.00 10 — 28 20 0.01 20
Ethylene glycol
monoethyl ether
−15.54 1.00 2.00 — — — — — —
Ethylene oxide −6.21 1.00 1.00 800 — — — — —
Formaldehyde −12.24 1.30 2.00 20 — — — 0.01 25
Hydrogen chloride −16.85 2.00 1.00 50 620 210 100 0.03 150
Hydrogen cyanide −29.42 3.01 1.43 50 27 21 15 — 25
Hydrogen fluoride −48.33 4.853 1.00 30 170 62 44 —
Hydrogen sulfide −31.42 3.01 1.43 100 76 60 50 — 100
Methanol — — — — 15,000 15,000 7,900 —
Methyl bromide −56.81 5.27 1.00 — — — — — 200
Methyl isocyanate −5.64 1.64 0.65 — — — — — —
Nitric acid −5.48 1.00 2.00 — — — — — —
Nitrogen dioxide −13.79 1.40 2.00 20 — — — — —
Phosgene −19.27 3.69 1.00 2 3.6 1.5 0.75 — —
Propylene oxide −7.415 0.509 2.00 400 — — — 0.59 750
Styrene — — — 700 — — — — 1,000
Sulphur dioxide −15.67 2.10 1.00 100 — — — — —
Toluene −6.79 0.41 2.50 500 1,600 900 630 — —
Toluene
diisocyanate
−4.49 1.00 2.00 — — — — — —
NOTE Shaded areas in the above table designate toxic fluids and toxic impact criteria modeled in the Level 1 consequence analysis
described in Section 4.9. In the Level 2 consequence analysis, all data can be considered for all other fluids and toxic impact criteria.