Subsurface Utility Engineering Quality Level B Field Log

Field inspection log for documenting ASCE 38-22 Quality Level B utility designation using surface geophysical methods, including methods used, instrument settings, depth estimates, utility markings, and APWA color-coded field observations.

Inspection Details and Scope

• Project name and field log identifier recorded
• Inspection date and start time recorded
• Site location and limits of work documented
• Utility designation scope defined for Quality Level B
• Inspector or crew lead identified

Surface Geophysical Method and Instrument Verification

• Surface geophysical method selected for each utility
• Instrument make, model, and serial number recorded
• Instrument calibration or functional check completed before use
• Signal interpretation or scan settings documented
• Utility locate verification performed at known reference point

Utility Designation Observations

• Utility type identified for each locate
• Horizontal utility alignment traced and documented
• Depth estimate recorded for each designated utility
• Depth estimate method documented
• Locate confidence or signal quality assessed

APWA Color Marking and Field Evidence

• APWA color code used for each utility type
• Utility marks are legible, continuous, and field-verifiable
• Marking offsets, arrows, or line style documented
• Photo evidence captured for representative utility marks

Site Conditions, Safety, and Sign-Off

• Site conditions affecting locate accuracy documented
• Access restrictions, obstructions, or interference sources noted
• Inspector signature completed
• Log reviewed and accepted for project record