I&I Investigation Field Form
A field form used during smoke/dye testing, flow monitoring, and manhole inspections to document inflow and infiltration sources. File completed forms with the collection system asset record.
I&I INVESTIGATION FIELD FORM
Complete one form per investigation reach or manhole
Date
8/26/2026
1. Investigation Location
Manhole / reach ID
Street / GPS location
Pipe size & material
Date / time of inspection
Inspector(s)
WeatherRainfall last 24h
2. Test Type Performed
3. Field Measurements
Upstream flow (gpm)
Downstream flow (gpm)
Net I/I (gpm)
Flow meter ID
Duration monitored
Smoke blown (min)
4. Source Identified
5. Observations & Sketch / Photo Notes
Describe the source, severity, and photo references. Sketch smoke exits or dye cross-connections.
6. Recommended Action
Priority (High / Med / Low)
Recommended rehabilitation
Follow-up work order #
Cost estimate (if known)
7. Sign-off
Inspector signature
Date / time
Reviewed by
Date / time