Basins, clarifiers and digesters commissioned on evidence. The concrete is captured before it is buried, the process train is witnessed test by test, and the pack that leaves at handover is the one the plant was actually built to.
Capture · Mission 22
The sheet above is a drawing of this. 10 capture waypoints, and every finding called as the aircraft reaches it — scroll sets the target, the mission keeps its own pace, and the page waits for it.
Sector · Water treatment
Forty-eight NTU at the screens, and four-tenths over the weir. The sortie flies the train in the order the water goes through it — the inlet works, four primaries, eight aeration lanes boiling with air, four clarifiers going clear from the well to the launder, two digesters, and the cascade at +3.10 — then hands the record to the operator on a clarifier bridge, reading the two millimetres a wet test is actually for.
A treatment plant is a concrete box full of pipework, and most of it disappears under a slab or a backfill within a week of being installed. The gallery as-built gets drawn from memory two years later.
Every gallery, duct bank and buried run is captured and laid over the model before it is covered. Drift between REV C and what is actually in the ground is flagged while the trench is still open.
A basin is watertightness-tested once, at night, with three people watching a tape. The evidence is a form with a number on it, and the client's engineer was not standing there when it was written.
The wet test runs as a structured gate: the dry walk, the fill rate, the level held and the drop measured all attach to the same checkpoint, so the witness signature has the frames behind it.
Process packages get claimed as percentages — aeration is 'about eighty per cent'. Nobody can walk six basins, four clarifiers and a digester deck in the two days before the certificate is due.
The application is assembled package by package against captured evidence, screens through to instrumentation. The $150,000 between claimed and witnessed is settled on frames instead of becoming a dispute.
380 MLD
Design throughput at handover
14
Basins, clarifiers and digesters
42
Wet tests passed on the first pass
The program runs on the build's own sequence — the open trench, the dry walk, the fill. Everything is captured in the days it can still be seen, because a treatment plant buries its own evidence.
Every buried run, while the trench is open
Every gallery, duct bank and buried run is captured and laid over the model before it is covered. Drift between REV C and what is actually in the ground is flagged while the trench is still open.
1.2CM · REV C VS BUILT · Δ FLAGGEDBefore every fill, on the test gate
The basin is walked dry with every weld on frame before the water goes in. When the wet test is signed at midnight, the witness signature has the afternoon's frames behind it.
BASIN 06 · WALKED 18:00 · EVERY WELDEach test, from fill to sign-off
The fill rate, the level held and the drop measured all attach to the same checkpoint as the dry walk. Test 42 on basin 06 held the weir at +3.10 m, passed at 23:40, and closed as a package by 06:00.
WET TESTS 42 · GATES/PHASE 12 · WEIR +3.10MEach application, package by package
The application is assembled against captured evidence from the screens through to instrumentation. The $150,000 between claimed and witnessed is settled on frames instead of becoming a dispute.
APPLICATION 07 · 6 PACKAGES · Δ $150,000All of it, before it goes. Every gallery, duct bank and buried run is captured at 1.2 cm and laid over the model while the trench is open — so the as-built is a record, not a drawing from memory two years later.
REV C VS BUILT · Δ FLAGGEDThe record does. The dry walk, the fill rate, the level held and the drop measured attach to one checkpoint — test 42 on basin 06 passed at 23:40, witnessed against the 18:00 dry walk, package closed by 06:00.
WET TEST 42 · PASSED 23:40Package by package, yes. Application 07 claims $4.12M against a witnessed record of $3.97M across six process packages, screens through to instrumentation — and the Δ $150,000 is settled on frames, not in a meeting.
APPLICATION 07 · Δ $150,000No — the gates run on the build's own sequence. Twelve gates per phase collect the evidence as the work happens, so nothing is reconstructed at the end: 42 wet tests passed on the first pass, each with its walk attached.
GATES/PHASE 12 · WET TESTS 42The plant's own datum, intake to outfall: the weir at +3.1 m, basin inverts at −2.4 m, digester base at −4.8 m and the outfall at −6.0 m — one hydraulic line through the train, never converted twice.
WEIR +3.1M · OUTFALL −6.0MThe plant. A 380 MLD train of 14 basins, clarifiers and digesters captured before backfill, 42 wet tests passed with the frames attached — the pack that leaves is the plant that was actually built.
380 MLD · BASINS 14 · WET TESTS 42Read overnight on a plant like P-04: the trench captures ahead of backfill, wet test 42's gate, Application 07 and the model at REV C. Three of the 27 profiles wake up to it.
06:10 · PLANT P-04 · BASIN 06
HANDOVER
Wet test 42 passed at 23:40, witnessed against the 18:00 dry walk, and the package closed at 06:00 with the frames attached — the pack is one basin closer to leaving with the plant.
CITES: WET TEST 42 · DRY WALK 18:00 · WEIR +3.10M
07:30 · PLANT P-04 · MODEL REV C
BIM VS BUILT
Every buried run captured this week is laid over REV C before backfill — the drift is flagged while the trench is still open, not drawn from memory when the gallery as-built is finally asked for.
CITES: TRENCH CAPTURE · REV C · Δ FLAGGED
06:55 · APPLICATION 07 · 6 PACKAGES
EXPOSURE
Application 07 claims $4.12M; the witnessed record carries $3.97M — the $150,000 gap is settled on frames this week instead of surfacing as a dispute at handover.
CITES: APPLICATION 07 · WITNESSED $3.97M · Δ $150,000
Overlay capture on the model; drift caught while it's cheap
REV C VS BUILT · Δ FLAGGEDStructured gates that catch it while it's fixable
GATES/PHASE 12Pay for work that is provably there
CLAIMED VS VERIFIEDWeekly floor walks auto-pinned to drawings
8 FLOORS/HR · AUTO-PINNEDFigures are a specimen record, drawn to the platform's own conventions.
Send us a process train and a test schedule — we will take one basin from dry walk to wet test and hand you the package with the frames attached.