Table 7.
Average concentration of total airborne dust (mg/m3) calculated for samples of industry measurements in a pilot study, and official averages produced by the uranium industry
| Year | Average | S.D. | Range | CV% | N | Official Average |
|---|---|---|---|---|---|---|
| 1958 | 8.3 | 101.0 | (0.5–2324.8) | 1216.4 | 2129 | - |
| 1959 | 5.9 | 29.5 | (0.0–850.0) | 500.1 | 2087 | - |
| 1960 | 7.5 | 19.3 | (0.0–462.0) | 256.4 | 1582 | - |
| 1964 | 5.6 | 11.4 | (0.2–239.6) | 202.1 | 925 | 3.76 |
| 1965 | 4.3 | 4.9 | (0.3–47.6) | 114.2 | 195 | 3.80 |
| 1970 | 2.2 | 4.4 | (0.1–40.0) | 198.0 | 307 | 1.87 |
| 1975 | 1.3 | 2.7 | (0.1–63.5) | 213.6 | 673 | 0.89 |
| 1980 | 0.7 | 0.7 | (0.1–5.6) | 97.0 | 983 | 0.88 |
| 1985 | 0.9 | 1.2 | (0.1–18.0) | 128.8 | 958 | 0.88 |