Draft Infiltration and Inflow Report March 1998

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41. If roots were encountered with the defect, a code of 41, which includes cost for televising and de-rooting, was assigned. A code of 40, including cost for televising only, was assigned if no roots were found. No removal of I/I or cost for rehabilitation was assigned to the defects in either case. I/I quantification from the defects, however, was preserved. Mainline defects found through manhole inspection (lamping) were recommended for televising before repair, to avoid unnecessary rework due to additional defects that might be found farther in the line. Four rehabilitation codes were created for these defects: 431, 432, 441, and 442. A rehabilitation code of 431 indicates a point repair(s) with no roots, 432 indicates a point repair(s) with roots, 441 indicates a partial replacement with no roots, and 442 indicates a partial replacement with roots. These codes preserve I/I quantification, cost of rehabilitation for the point repair(s), and include cost to televise the line and de-root, if necessary. Removal of I/I is the same as for point repair(s) or partial replacement. 2. Special Manhole Rehabilitation Codes Manhole defects found during smoke testing are typically chazacterized as either frame defects, frame seal defects, chimney defects, cone defects, or wall defects. When the analysis is performed, an attempt is made to correlate the defects detected through smoke testing to those found during manhole inspection. There are instances, however, where the manhole appears to be in good condition, yet there is smoke exiting the ground in the vicinity of the manhole. ADS recommends that these defects be dye tested to determine the exact nature of the problem, and has assigned a special rehabilitation code of 84 to designate the defects. It is possible that some defects may actually be line or service defects that were mistakenly identified as manhole smoke defects. ADS Environmental Services, Inc. V-3