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. 3r~ During the field investigations of this project traffic control for the public safety will be maintained. The disruption of traffic will be minimized. ADS will abide by the traffic control procedures outlined in the ADS Field Safety Manual. However, these guidelines will not override local or state traffic control regulations. B. Above Ground Reconnaissance/ Map Update Above ground reconnaissance will be performed on 100% of the sanitary sewer system within Sub-basin 6. This data will supply background base data to be used during the collection system analysis. Above ground physical inspection determines the physical condition, location and length of the sewer system to identify covered manholes. The data will be used to verify and update the sanitary sewer collection system map. The following data to be recorded is to include, but not be limited to: - Length between manholes - Identification of each manhole in accordance with the Black and Veatch established criteria - Identification of covered or unlocated manholes - Identification of visible sources of extraneous flow - Notation of unusual conditions that may require immediate attention - Confirmation of flow direction . The CITY's digital maps will be updated utilizing field corrected maps developed during the above ground reconnaissance task. The CITY's existing AutoCAD information file will serve as the base file of information. Manhole locations, line locations, line lengths, line sizes, and flow direction will be included on the maps. ADS will review each node and compare this to the field corrected maps to ensure all information is complete and accurate. C. Manhole InspectionNisual Pipe Inspection Internal inspections of 100% of all sanitary access structures within the project will be conducted. PIPECAMTM will be utilized to provide televised inspection of the access structures. In the event that televised inspection is not possible, the access structure will be entered and inspected. Should a confined space entry be necessary, Industry standard OSHA, NIOSH, OSDA and NASSCO confined space entry policies and practices will be followed to ensure safe entry and egress of all access structures. In the event of conflicting requirements, OSHA standards will prevail. All manhole components (i.e., cover, frame, frame seal, chimney, corbel, wall, etc.) will be inspected and recorded on standard field inspection forms. Pipe diameter measurements will be rounded to the nearest industry standard pipe diameter (i.e., a measurement of 7.75" will be recorded as 8.0"). The rim-to-invert measurements, in tenths of feet, and general orientation for all connecting lines will be recorded. Photographic images will be captured of the general surroundings of each manhole and selected defects. G:\DALLAS\C 0 NTRA cnSMAR Cb6. DOC April 11,1997