Proposal - American Leak Detection - Detection of Leaks for SB Water Leak Survey

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M E Simpson Co , Inc. I Water Distribution System Leak Detection Program Page 3 The Project Team will use "State of the Art" Electronic Leak Correlatorsto determine if a leak is present and use the same equipment to pinpoint the leak. For PVC water mains only the Echologics LeakFinder-ST w/hydrophones leak correlator or Fluid Conservation Systems (FCS) TriCorr Touch leak correlator, will be used for correlations because of the ability for these correlators to be able to analyze the particular sound frequencies inherent to PVC pipe. The leak location will be marked in the field (on the surface) using environmentally formulated Precautionary Blue paint. The Project Team will document all leak locations with a diagram indicating the location of the leak. Other information related to that correlation will be included as part of the field sheet such as the filters used for the correlation, line locations, distances between sensors, etc. The locations of leaks requiring immediate attention firnmediate threat t� life Lnj_4ry Qy tufflfl will be turned in as quickly as possible to facilitate the repair process. The Project Team will report daily or per request of the Utility, to assigned Utility Professional and go over the progress of the previous day, as well as cover what will be surveyed the current day. It may be necessary to conduct parts of the Leak Survey during "off hours" such as at night. This may be required in areas of high traffic volume where traffic noise may affect the ability to detect leak noise, and traffic volume may affect the ability of the Project Team to be able to safely access main line valves in the middle of the street. The Project Team will give 24-hour advanced notice of intent to survey a particular area that may require after hours surveying or nighttime surveying. This is so the Utility can plan for the area to be surveyed, give notification to the Police department, as well as other Public Works Divisions as to the activity that will take place. As a part of the leak program, mapping discrepancies found, distribution assets found in disrepair will be noted and turned into the utility. Leaks verified on the customer's side of a service shut-off will not be located beyond the shut- off. If a leak appears to be on the Customers' side, the Utility will be notified first, then the customer notified and permission granted prior to the water being shut off even for short periods of time where possible and as time allows, as well as the ability for the customer to respond. If the Utility requests leak locations beyond the service shut off on the customer's side of the service line, this will result in an additional charge to the leak survey based on an hourly rate and this service must be agreed upon between the Utility and M.E. Simpson Co., Inc. prior to the start of the survey. Valves and hydrants will not be operated without Utility permission. Valves and hydrants that break during this type of operation are the sole responsibility of the Utility. M.E. Simpson Co., Inc. cannot be responsible for valves and hydrants that break due to pre-existing conditions.