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Roseville City Council Page 4 of 5 as a refrigerated ice surface. Presumably, we would want to explore the costs and benefits of using that area in a different way or in replacing it with some- thing else. III. Another Complication Unfortunately, the chiller leaks are not the only leaks in the OVAL's refrigera- tion system. We believe there is a leak or leaks within the plastic pipe distribu- tion system. As noted above, there are over 80 miles of plastic distribution pipe at the OVAL. This pipe is divided among six separate zones; within each zone there are approximately 12 miles of pipe. The pressure problem in the distribution system is in the south zone of the OVAL. With the assistance of a private contractor, we have tried ultra-sound technol- ogy to find this pressure problem in the south zone of the OVAL. However, that effort was unsuccessful. Experts tell us our best chance to find this leak is to pressurize chilled brine through the south zone and then try to find the leak or leaks with infra-red technology. (Coldbrine, warm earth - though the earth is not going to be rela- tively warm much longer.) However, due to the leaks in the chiller vessel described above, we are unable to deliver chilled brine to the plastic distribution pipes. Hence, we may not be able to identify the location of the leak or leaks in the plastic distribution pipe until the chiller system is repaired. (Possiblywe could warm the brine some- how and pressurize the south zone of the OVAL with a portable device to see if infra-red technology could find the leak or leaks this winter. Warm brine, cold earth.) Once we find this pressure problem in the distribution system we will have a better sense of how long and how much it will cost to repair this part of the problem. These costs could vary widely. The cost could be $1,000 � the prob- lem is one leak that is readily accessible and not within the concrete floor of the OVAL. The cost could be much higher, involving tens of thousands of dol- lars, � there are multiple leaks that include pipe embedded within the concrete floor of the OVAL. IV. Process Considerations; Council Direction Staff would like the opportunity to answer all Council questions. In addition, we need Council's thoughts and feelings about the repair options outlined above. We also need Council direction about some process issues.