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PUBLIC WORKS MEMORANDUM <br /> NO. 2019-01 <br /> DATE: December 17,2018 <br /> TO: Honorable Mayor Moore Wolfe and City Council Members <br /> FROM: Billy Tyus, Interim City Manager <br /> Matthew C. Newell, P.E., Public Works Director <br /> Deborah M. Perry, Purchasing Supervisor <br /> SUBJECT: Resolution Accepting the Bid Price of InfoSense, Inc. for the Purchase of a Sewer <br /> Acoustic Inspection System. <br /> SUMMARY RECOMMENDATION: <br /> It is recommended by staff that the City Council approve, that the Mayor be authorized to sign, and <br /> the City Clerk attest a resolution approving a purchase order for $26,470 with InfoSense, Inc. as the <br /> lowest bidder for a sewer acoustic inspection system to assist with operation and maintenance of the <br /> sanitary sewer system. <br /> PRIOR COUNCIL ACTION: None <br /> BACKGROUND: <br /> Sanitary Sewer Priorities <br /> Under the direction of the City Council,the Public Works Department has established four priorities <br /> to improve the City's sanitary sewer collection system as defined in the Sanitary Sewer Master Plan. <br /> 1. Critical Large Diameter Sewer Rehabilitation. <br /> 2. Sanitary Sewer Overflows Due to Inflow and Infiltration. <br /> 3. System Operation and Maintenance <br /> 4. Small Diameter Sewer Rehabilitation <br /> The acoustic inspection system primarily addresses priority numbers 3 and 4, system operation and <br /> maintenance and small diameter sewer rehabilitation. <br /> Acoustic Inspection System <br /> An Acoustic Inspection System(AIS)will assist City maintenance crews to focus their cleaning <br /> efforts with identified problem areas within the sanitary sewer system. The AIS relies on the physics <br /> that sound traveling through the pipe mimics the flow of water through a pipe. The AIS provides a <br /> transmitter(yeller) and receiver(listener)to be placed within the manholes of a section of pipe. The <br /> AIS process calculates the amount of sound loss through the section of pipe. The sound loss <br /> calculated gives the pipe a rating score which assists in identifying if the pipe needs additional <br /> cleaning or closed circuit televised(CCTV). The inspection can be completed in less than 5 minutes, <br /> compared to cleaning or CCTV time of greater than 30 minutes for easy to access lines. <br /> � 1 � <br />