R2021-114 Resolution Authorizing a Professional Engineering Services Agreement with AECOM Technical Services, Inc. to Provide Preliminary Design Services for the Oakland and Grand Area Sewer Separation Study, City Project 2021-01

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ASCOM Exhibit A-3 AECOM 312 938 0300 tel 303 East Wacker Drive 312 373 6800 fax Suite 1400 Chicago,IL 60601 www.aecom.com documented with digital photographs of each manhole, including location of defects. AECOM owns a pole/down-hole camera to better view defects observed without the need to enter the manhole. Recommendations will be made for replacement, rehabilitation, or repair. As part of the inspection, the structure location, construction type, structural condition, frame, chimney, cone, barrel, bench, and step condition will be noted. Inspection data will be entered into a database, spreadsheet or on a manhole inspection form modified to include criteria important to the City. Manhole inspections primarily identify structural conditions and defects. As part of the inspections, the following items will be recorded: • Manhole number • Street location • Date of inspection • Name of inspector • Cover type • Frame grade, condition, and seal • Presence and condition of internal boot • Step condition • Chimney type and condition • Cone type and condition • Barrel type and condition • Bench condition (if applicable) • Sketch showing pipes entering and exiting each manhole • Pipe sizes and material for all pipes entering or exiting each manhole • Depth of pipe inverts, as measured from the structure rim • Underdrain pipes entering each manhole • Condition/seal of underdrain pipes At a minimum and with City approval, photographs will be taken as follows: • With the cover on, showing pavement/ground surface around the manhole and in the vicinity of the manhole. • With the cover opened, showing a view of the chimney and the chimney/frame interface • From the top of the manhole looking down. • All significant defects. Pipe orientation shown on the base map will be verified by the inspection crew for all manholes. A sketch will be completed showing the orientation/direction of all pipes entering or exiting the manhole along with pipe sizes and pipe material. No confined space entry into the existing manholes will be performed. The final report will document system defects, including the results of the structure inspections, including observed conditions, and prioritized rehabilitation. Recommendations for future work, based on the results of the structure inspections, will be included in the final analysis. This task will assist us in our study evaluation in confirming connectivity of inlets and catch basins to the existing sewer system. Deliverables: • Structure Inspection Results and Review(included in Task 5) 3