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The technical memorandum will provide tabular and graphical listings of flooded/quantified system assets. The Consultant will provide the City with both hardcopy and electronic formats (Word, Excel or Access) of this memorandum. 1.7 TASK 6 -FLOW ISOLATION The Consultant will: 1.7.1 Divide the major basins into smaller areas (2,000-5,000 L.F.) and take weir readings during minimum flow periods (11 p.m.-6 a.m.) to determine if infiltration rates from groundwater require additional investigation. The Consultant will isolate approximately 10 locations using this method. 1.7.2 Prepare a technical memorandum outlining the results of this task for review by the City. The technical memorandum will provide tabular listings of locations showing evidence of significant groundwater infiltration. The Consultant will provide the City with both hardcopy and electronic formats (Word, Excel or Microsoft Access 2000) of this memorandum. 1.8 TASK 7 -SANITARY SEWER MAIN CLEANING The Consultant will: 1.8.1 Clean approximately 5% of the total footage of sewer lines in the study area. The Consultant will provide the City's representative with a listing of the sanitary sewer main cleaning candidates for its approval before the operation begins. Prepare the sewer lines to be internally inspected by cleaning the pipe walls to provide for unobstructed internal inspection. The Consultant will accomplish this cleaning by using a hydraulic cleaning unit. The Consultant guarantees that all debris, sediment and sludge removed from the sewer lines will be disposed of at a permitted site as designated by the City. When obstructions are encountered, the Consultant will attempt to clean the sewer from both upstream and downstream manholes. 1.8.2 Conduct all sanitary sewer main cleaning in accordance with the standard National Association of Sewer Service Companies ("NASSCO") specifications for sewer main cleaning. 1.8.3 If cleaning of the pipe segment cannot be satisfactorily accomplished after three passes of the sewer main, turn the particular segment over to the City for heavy duty cleaning, removal of roots/heavy debris, and/or removal of other obstructions as required or the City will allow this service as an additional service in accordance with Section 1.16. Any debris/sediment removed from the collection system during this operation will be disposed of by the Consultant at a location designated by City and in accordance with all state and local regulations. The cost of any traffic control equipment and/or traffic will be included in the cleaning cost except as provided in Article 2. GSWW, Inc. Contract 6