Three members of Thew Associates staff obtain PACP certification
Thew Associates PE-LS, PLLC is excited to announce the recent completion and certification of the NASSCO (National Association of Sewer Service Companies) PACP (Pipeline Assessment Certification Program), LACP (Lateral Assessment Certification Program), and MACP (Manhole Assessment Certification Program) by three of its staff members.
NASSCO’s PACP, LACP, and MACP programs provide industry deficient coding standards and forms when performing pipeline, lateral, and manhole inspections utilizing Closed Circuit Television (CCTV) and certified PACP software. This standardization allows end users (municipalities, engineers, GIS specialists) to quickly review and interpolate inspection reports to determine the conditions of sanitary and storm mainlines, laterals, and manholes.
Typically, inspections are performed utilizing a tractor or push camera in sanitary and storm piping when flows are minimal or absent. If required, the pipe could be cleaned prior to performing the investigation utilizing a high pressure water jetter to obtain a clear video of the pipe walls and deficiencies. In systems of high flow, the pipe could be plugged with an inflatable bladder and bypassed while the inspection is being performed. The camera is advanced along the pipe and digital color video is recorded. The camera can be stopped in the pipe at identified deficiencies and the certified operator will note the defect utilizing PACP deficiency codes within PACP certified software. Still images of each defect are captured and included in the software generated inspection report.
CCTV pipe inspections are typically required for Operation and Maintenance (O&M), Pre- and Post-Construction, verification of the diameter, length, and that installation was performed in accordance with project specifications and project closeout documents, and in emergency situations.
PACP, LACP, and MACP inspection reports can be used for the following.
Generate hydraulic models
Mainline, lateral, and manhole O&M schedules
Determine if conditions are suitable to utilize CIPP (Cured In Place Pipe)
Determine if mainlines, laterals, or manholes can be rehabilitated or should be replaced
Determine lineal footage, pipe size, type, and number of laterals for rehabilitation or replacement cost estimates
Verify new mainlines, laterals, and manholes were installed in accordance with project specifications
Seamlessly integrate the reports into existing GIS databases
In conjunction with CCTV pipe inspections, Thew Associates can utilize subsurface utility locating devices such as Radio Frequency (RF) and Ground Penetrating Radar (GPR) devices to accurately trace and mark the location of subsurface utilities and three-dimensionally locate identified subsurface utilities utilizing Trimble R-8 Dual-Frequency GNSS GPS Units. The subsurface utilities can then be mapped in an AutoCAD (Release 2013) environment utilizing Civil 3D surveying and engineering software.