Final Draft - Infiltration and Inflow Report June 1998

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include those found between the mainline and the property line on service lines. Examples of such defects include broken clean-outs and breaks in the service line. The second major category, private sector defects, are those found on private property. Examples of such defects include broken clean-outs, illegal roof drain connections, and defective service lines. The following section provides a summary of the field procedures used to identify the source defects. C. Field Testing Procedures 1. Visual Manhole and Pipe Inspection Of the targeted 2639 system inspection points in the collection system, Visual inspections were performed on 1468 manholes. There were 20 buried manholes, 28 surcharged manholes, 94 manholes that could not be located, and 14 manholes that could not be opened. Additional structures included 123 cleanouts, 748 end-of-line segments, and 144 tees. Of the 123 cleanouts, 101 were inspected. Each manhole and the pipelines entering the manhole were inspected with the use of strong artificial light or reflected sunlight. The photographs that were taken to record the conditions encountered provided two significant functions: (1) a visual inventory of the structures, and (2) the location and description of the observed defects. The manhole and mainline inspection data, including the photographs, are included in Appendix F. 2. Inventory of the Collection System Out of a total system footage of 968,741 linear feet of sanitary sewage pipe, field representatives performed inspections on 928,9391inear feet. The collected data was used to create a database on the physical characteristics of the system, and to provide information to assist during the rehabilitation phase of the project. A complete pipe inventory for the Paris collection ADS Environmental Services, Inc. III-2