Laserfiche WebLink
observations and estimates of the size of the drainage area tributary to the <br />defect. <br />7. Dye Water Flooding <br />Dye flooding was performed at 135 locations in conjunction with internal <br />television inspection to locate line defects associated with specific smoke <br />leaks. Dye flooding was performed by introducing fluorescent dye into <br />potential inflow sources through ponding areas, and then visually <br />monitoring the flows from adjacent collection system lines for signs of dyed <br />water as an indication of inflow. Each leak identified during the dye <br />flooding procedure was assigned an estimated flow rate. Dye tests <br />performed are included in Appendix F with the internal television logs. <br />8. Clean and Television Inspection <br />Internal television (TV) recommendations were based on findings observed <br />during the visual inspection and smoke testing phases of the survey <br />activities. Collection system lines that had major defects such as cracked <br />pipe, offset joints, and mainline smoke defects were concluded to require <br />TV inspection to pinpoint the defects, ascertain their extent and magnitude, <br />determine possible I/I sources, and help develop appropriate repair methods. <br />Hydraulic cleaning and internal TV inspections were performed on <br />approximately 53,000 linear feet of pipe. A closed circuit TV camera was <br />guided through the pipe and conditions and defects were observed and <br />recorded on logs. These logs and a tape index are included in Appendix F. <br />TV inspection videotapes are also included separately from this report. <br />ADS Environmental Services, Inc. <br />III-7 <br />