BTEX Migration through Various Geomembranes and Vapor Barriers
Bibliographic record
Abstract
Four polyethylene based vapor barriers and six different geomembranes were examined for their diffusive properties with respect to benzene, toluene, ethylbenzene, and xylenes (BTEX). All four vapor barriers performed comparably. Of the geomembranes tested, high-density polyethylene (HDPE) showed the greatest diffusive resistance to BTEX, while polyvinyl chloride (PVC) showed the least, LLDPE (linear low-density polyethylene), CSPE (chlorosulphonated polyethylene) and two KEE/EIA (ketone ethylene ester/ethylene interpolymer alloy) geomembranes all performed similarly, bounded by HDPE and PVC. Based on data collected at 22, 30, and 40°C, Arrhenius relationships are presented for the six geomembranes. Each geomembrane was evaluated for performance as a diffusive barrier in a landfill cover scenario. Each vapor barrier and two geomembranes were evaluated, through contaminant transport modeling, for performance as a diffusive barrier to vapor intrusion into a warehouse and substantial potential differences in performance are reported.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 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".