Exploratory Sampling of Asbestos in Residences Near Thetford Mines: The Public Health Threat in Quebec
Bibliographic record
Abstract
In 2003-2004, the Asbestos Victims Association of Quebec undertook an exploratory sampling of the air and soil in the residential community of asbestos mining towns. In the 26 houses in the Thetford Mines area, 28 air samples were collected; one outdoor air sample was collected; 14 soil samples were taken; one dust sample was taken from a windowsill. The AHERA criterion was exceeded in 15 of the 28 air samples collected and the World Trade Center criterion was exceeded in five of 26 cases. The risk of developing asbestos-related cancer following such in-home exposures over 30 years is estimated at 1 in 10,000. Soil from the driveways or backyards of nine homes was covered with residue from a tailing pile. Of 14 samples, seven had chrysotile content in excess of 10%; in three, content exceeded 60%, and one reached 100%. Dust from the windowsill had a chrysotile content of 1.2 million structures of all lengths/sq cm. These results suggest a real public health threat in the Quebec mining areas.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".