Long-Term Properties of PVC Water Pipe Used in a Small Chlorinated Water System for 50+ Years in Endicott, Nebraska
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Today’s ASTM standards have been applied to 50-year-old pipe removed from a water system in Endicott, Nebraska, to provide a PVC pipe performance analysis. This pipe was removed in order to install replacement valves to the distribution system. Olsson, Inc. in Lincoln, Nebraska, designed the Endicott water system improvements project. Olsson provided 2-in. and 4-in. PVC pipe samples that had been removed from buried service to Diamond Plastics Corporation (DPC) in Grand Island, Nebraska, in order to perform testing on the pipe in accordance with the most current version of ASTM D2241. After being in service for 50 years, the PVC pipe exhumed from Endicott, Nebraska, met nearly all the requirements set in ASTM D2241-15. This paper describes the in-service pipe conditions and discusses the testing procedures used to analyze the PVC pipe, what conclusions can be made from this testing, and how these results compare to earlier studies.
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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) | 0.000 | 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 it