In Situ Ground Water Remediation Using the Trench and Gate System
Bibliographic record
Abstract
Abstract The trench and gate remediation system is a funnel and gate design modified for installation in tills and other low permeability sediments. Modifications include the addition of high hydraulic conductivity trenches along the upgradient side of the funnel walls and a discharge reinfiltration gallery downgradient from the treatment gate. Preferential ground water flow through the high permeability trenches and reinfiltration gallery prevents mounding, which otherwise forces flow beneath and around funnel walls. The resultant capture zone is larger, both horizontally and vertically, than the cross‐sectional funnel area and is significantly larger than the capture zone of a similar funnel and gate system. The system constitutes an economical, in situ, long‐term contaminant plume capture and treatment method. In effectiveness and cost, the trench and gate system compares favorably with, or outper‐forms, other remediation systems in near‐surface, low permeability dissolved contaminant scenarios. A prototype trench and gate system was installed at the East Garrington Gas Plant, Alberta, Canada, in 1995. The installation demonstrated the effectiveness of the concept, and the system has successfully prevented off‐site migration of dissolved hydrocarbon contaminants.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| 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 | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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 teacher head, 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".