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124 <br />125 <br />126 <br />127 <br />128 <br />129 <br />130 <br />131 <br />132 <br />133 <br />134 <br />135 <br />136 <br />137 <br />138 <br />139 <br />140 <br />141 <br />142 <br />143 <br />144 <br />145 <br />146 <br />147 <br />148 <br />149 <br />150 <br />151 <br />152 <br />153 <br />154 <br />155 <br />156 <br />157 <br />158 <br />159 <br />160 <br />161 <br />162 <br />163 <br />164 <br />165 <br />166 <br />167 <br />168 <br />169 <br />inflatable ball where the city's line met the private lateral to prevent use of the main line <br />beyond their lateral until the property owner chose to correct problem areas. <br />Mr. Pasko reported other variables among communities: total subsidy for rehabilitation <br />borne by the city, options for lower lateral rehabilitation by a city contractor only, and <br />some of those done up to the wye, some to the edge of the road, and some up to the <br />rights-of-way. Mr. Pasko noted that upper lateral lining was done by either using private <br />or city contractors. <br />Specific to Minnesota communities, Mr. Pasko provided a matrix of the options used by <br />the Cities of Edina, Golden Valley, Shakopee, Hastings, and Rockford; and for <br />comparison purposes, he included the City of Hampton Roads, VA in that matrix. <br />Overall, Mr. Pasko opined that the most successful option he observed around the <br />country was real estate transaction based, such as used by the City of Golden Valley, MN <br />with point-of-sale inspections performed from within the home allowing a holistic <br />viewpoint for both the upper and lower laterals. 'Mr. Pasko reported that some <br />communities choose a dye or smoke test when possible. On the east coast, Mr. Pasko <br />reported that over the last four years, they had experienced a turnover of homes at 10% to <br />15%, making those inspections a sustainable program, with the same home inspected <br />periodically over a fifteen year period nd thereby compiling a database of information <br />for the City's GIS system for comparison rposes. Mr. Pasko noted this was also <br />possible for inspecting new homes being cted annually and adding that data for <br />future comparison purposes as well. <br />Lower Lateral Tools Being Used: <br />• "Top -hat" style liner with the potential that it may be unable to fully wrap the <br />trunk sewer main and only able to extend <18" into the lateral pipe. Mr. <br />Pasko noted further problems with this tool include the brim not always being <br />wide enough to find its way through or around tree roots, causing <br />communities to shy away from using it. <br />"Shorty" style liner that does fully wrap the trunk sewer main, and extends 1- <br />2' into the lateral pipe. <br />• "Longer" style liner that fully wraps the trunk sewer main and extends >2' <br />into the lateral pipe and can be done with or without installing cleanouts. Mr. <br />Pasko reported that the City of Shakopee, MN currently uses this tool. <br />When to Use Robotic Tools: <br />• To prevent damage to a lateral liner, you must line the main line first <br />• Any sharp main liner edges must be brushed to prevent tearing of the lateral <br />liner <br />What Tools are Thev Using? <br />• Many communities use dig and replace in lower and upper laterals - <br />depending on specific situations <br />• Use of cleanouts vary among communities and depends on their location, <br />whether above or below ground <br />Page 4 of 20 <br />