Generation of job exposure matrix
| Department | Mean cadmium in air in mg/m3 (no. of samples) | |||||||
|---|---|---|---|---|---|---|---|---|
| 1947–53 | 1954–63 | 1964–68 | 1969–73 | 1974–78 | 1979–83 | 1984–88 | 1989–92 | |
| *Mid-period estimates shown (1949, 1956, 1966, 1971, 1976, 1981, 1986, 1991). | ||||||||
| †Reflects use of respiratory protection. | ||||||||
| ‡Assuming 25% time spent in platemaking, 10% in assembly, 5% in negative active material, and 60% in other departments (exposures received in first three departments modified by a factor of 0.5). | ||||||||
| Personal samples | ||||||||
| Platemaking | – | – | 0.14 (36) | 0.88 (272) | 0.20 (288) | 0.12 (324) | 0.05 (515) | 0.01 (226) |
| Assembly | – | – | 0.08 (3) | 1.51 (43) | 0.19 (154) | 0.17 (217) | 0.09 (183) | 0.024 (46) |
| Negative active material | – | – | – | 1.38 (18) | 0.77 (36) | 0.14 (2) | 0.14 (23) | 0.12 (18) |
| Casting and recovery | – | – | 0.32 (4) | 3.99 (13) | 0.13 (18) | – | – | – |
| Maintenance, inspection | – | – | – | – | – | – | – | – |
| Other departments | – | – | – | – | – | – | – | – |
| Static samples | ||||||||
| Platemaking | 0.38 (132) | 0.36 (163) | 0.38 (125) | 0.04 (65) | 0.11 (28) | 0.05 (62) | 0.008 (47) | |
| Assembly | 0.35 (81) | 0.09 (52) | 0.38 (75) | 0.06 (53) | 0.04 (34) | 0.06 (3) | 0.002 (42) | |
| Negative active material | 1.29 (30) | 1.17 (21) | 1.23 (36) | 0.64 (47) | 0.04 (4) | 0.03 (8) | 0.03 (48) | |
| Casting and recovery | 0.99 (20) | 0.54 (9) | 0.68 (8) | 0.96 (9) | – | – | – | |
| Maintenance, inspection | – | – | – | – | – | – | – | – |
| Other departments | – | – | – | – | – | – | – | – |
| Exposure estimates used for analysis* | ||||||||
| Platemaking | 1.5 | 1.5 | 1.3 | 0.6 | 0.3 | 0.1 | 0.06 | 0.03 |
| Assembly | 2.6 | 2.6 | 2.3 | 1.2 | 0.6 | 0.3 | 0.2 | 0.09 |
| Negative active material | 2.3 | 2.3 | 2.1 | 1.2 | 0.7 | 0.4 | 0.3 | 0.05† |
| Casting and recovery | 1.5 | 1.5 | 1.3 | 0.7 | 0.4 | 0.05† | 0.02† | 0.01† |
| Maintenance, inspection‡ | 0.4 | 0.4 | 0.4 | 0.2 | 0.1 | 0.05 | 0.03 | 0.01 |
| Other departments | 0.06 | 0.06 | 0.05 | 0.03 | 0.02 | 0.01 | 0.007 | 0.004 |