| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Info Request Item 8 | |||||||||||||||
| 3 | Welding Level 1 Risk Assessment | |||||||||||||||
| 4 | Georgia Pacific ― Toledo, Oregon | |||||||||||||||
| 6 | Toxic Air Contaminant | CAS | Daily Emissions Estimate (1) (lb/day) |
Annual Emissions Estimate (1) (lb/yr) |
Risk Based Concentration (2) (ug/m3) |
Acute Hazard Index (a) |
Cancer Risk (b) (Chances-in-1,000,000) |
Chronic Noncancer Hazard Index (b) | ||||||||
| 7 | Acute | Cancer | Chronic Noncancer | |||||||||||||
| 8 | Chromium (total) | 7440-47-3 | 3.1E-03 | 9.5E-01 | -- | -- | -- | -- | -- | -- | ||||||
| 9 | Chromium VI | 18540-29-9 | 7.9E-05 | 2.4E-02 | 3.0E+00 | 3.1E-04 | 8.3E-01 | 1.3E-03 | 3.5E+00 | 1.3E-03 | ||||||
| 10 | Cobalt and compounds | 7440-48-4 | 8.9E-06 | 2.7E-03 | -- | -- | 1.0E-01 | -- | -- | 1.2E-04 | ||||||
| 11 | Manganese and compounds | 7439-96-5 | 9.2E-03 | 2.8E+00 | 3.0E+00 | -- | 9.0E-01 | 1.5E-01 | -- | 1.4E-01 | ||||||
| 12 | Nickel compounds, insoluble | 365 | 4.2E-03 | 1.3E+00 | 2.0E+00 | 3.8E-02 | 1.4E-01 | 1.0E-01 | 1.5E+00 | 4.1E-01 | ||||||
| 13 | Total Risk Estimate | 2.5E-01 | 5.0E+00 | 5.5E-01 | ||||||||||||
| 14 | NOTES: | |||||||||||||||
| 15 | (a) | Acute hazard index = (Daily emissions estimate [lb/day]) x (dispersion factor [ug/m3/lb/day]) / (risk based concentration [ug/m3]) | ||||||||||||||
| 16 | Dispersion factor (ug/m3/lb/yr) = | 4.8 | (3) | |||||||||||||
| 17 | (b) | Cancer risk or chronic noncancer hazard index = (annual emissions estimate [lb/yr]) x (dispersion factor [ug/m3/lb/yr]) / (risk based concentration [ug/m3]) | ||||||||||||||
| 18 | Dispersion factor (ug/m3/lb/yr) = | 0.0045 | (3) | |||||||||||||
| 19 | ||||||||||||||||
| 20 | REFERENCES: | |||||||||||||||
| 21 | (1) | See emission estimates for welding activities. | ||||||||||||||
| 22 | (2) | OAR 340-245-8010 Table 2. The most restictive value for residential, worker and child exposure is conservatively used. | ||||||||||||||
| 23 | (3) | OAR 340-245-8010 Table 3. Assumes the most conservative annual exposure dispersion factor for fugitive emission releases. | ||||||||||||||