80-076 Ordinance - Laserfiche WebLink

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~; . " 1.1.4 The storm sewer system will be mapped from data developed in the walk-over survey to establish locations of possible storm-sanitary cross-connections. The mapping will be registered to the City's existing sanitary sewer map. 1.1.5 Ten (10) groundwater gauges furnished, installed, and monitored for the duration of the field work ten (10) groundwater gauges. 1.1.6 A maximum of ten (10) key manholes may be selected to be monitored for additional data on infiltration and inflow. These will be monitored using"a continuously recording depth of flow versus time flowmeter. 1.1.7 Smoke testing will be performed to note the severity of bad joints, to pinpoint illegal downspout connections, or other inflow sources. Notification to home owners will be given in those areas where smoke testing is~to be done. Maximum use of existing data will be made. Existing data from previous smoke testing will be reviewed for applica- bility. Photographs of~illegal connections and other surface Infiltration/Inflow sources will be made. The total length of sanitary sewer to be~smoke tested wall be 356,000 linear feet. 1.1.8 In those areas where inflow appears to be excessive, such as potential cross-connections, ditch or storm drain direct transfer to the sanitary system, dyed water flooding will be done to locate-the source. The total number of sites to be dyed water tested is 500 sites. 1.1.9 On buildings where the smoke testing is incon- clusive, a.positive confirmation test using either dyed water or a physical object such as ping gong balls will be used to verify a cross-connection between storm drainage and sanitary. drainage. The total number of buildings where testing for illegal connections will be performed is 200. 1.1.10 In those areas where the physical survey or rain- fall-simulation did not pinpoint the sources of infiltration and inflow, Dalton will prepare a justification for internal inspection and recommend the technique necessary for preparatory cleaning prior to physical inspection. 1.1.11 For those sewer sections to be internally inspected, closed circuit televisions will be used and photographs will be taken of points of Infiltration/Inflow. The total length of sanitary sewer to be internally inspected will be 53,400 linear-feet. 1.1.12 Data will be reviewed and cost effectiveness of Infiltration/Inflow elimination determined and compared to the alternative of transport and treatment. A list of priority projects will be established with. cost to correct problems found by the field work. The survey findings will be summarized in a report prepared in accordance with the -2-