The Compressore 1 sovrapressione valve check is on a 7-day schedule. So is the belt tensioning. So is the soffiatore level check. Miss any one of them by a week and you might not notice the variance in aeration distribution until the dissolved oxygen reading in the oxidation tank drops enough to affect the biology. By then you're looking at sludge bulking, a failing clarifier, and a regulator visit coming up in four days.
When the 7-GG Checks Go Untracked
Most wastewater plant failures don't arrive as dramatic equipment events. They arrive as gradual process drift that nobody documented precisely enough to catch early. The belt on a blower runs slightly slack for two weeks, the airflow distribution shifts incrementally, the DO reading drifts from 2.1 to 1.4 mg/L across eight visits, and nobody has a trend line because each visit's reading lives in a paper logbook that nobody cross-references.
This template is built for exactly that process discipline. Each entry captures the daily dual-visit structure — Ora ingresso and Ora uscita for both the first and second visit, with Operatore fields for each — and then works through every critical check point: sgrigliatura, big-bag fill level (vuoto through pieno), bypass status, mixer vibration, P1 and P2 submersible pump noise assessment, and the full compressor section with its time-locked 7-day checks explicitly flagged in the field names.
The Imhoff cone readings — Misura concentrazione fanghi and Misura volume fanghi al cono Imhoff — are text fields rather than numeric types, because the entry format includes both the value and the context note in practice. The redox potential reading follows the same pattern. Over a month of entries, these text fields produce a readable trend that a pure numeric field misrepresents by stripping the operator's observation.
Where the Template Pays for Itself
It's the surnatante check on the sedimentators. The Presenza surnatanti field runs from assenti through copertura parziale to copertura totale spessa. On any given visit, the rating looks like routine monitoring. Across twelve consecutive entries, a trend from assenti toward copertura parziale with a correlated increase in the Misura concentrazione fanghi di ricircolo reading is an early warning of sludge that's going septic in the secondary clarifier — visible in the data three visits before you'd smell it standing at the basin edge.
The carroponte raschiatore check — verifying no impuntamenti in the peripheral scraper bridge movement — is the kind of field that seems redundant on a good day and indispensable on the day the mechanism jams against accumulated material at the 6:45 AM first visit when temperatures dropped overnight and the biological layer stiffened.
Offline mode in Memento means these records get entered at the tank edge, not reconstructed from memory in the office at end of shift.