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

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M.E. Simpson Co., Inc. I Water IDist0butiion .System Leak Detection (Program Page 2 Water Distribution System Leak Survey Fhe Field ,Scope of Service for the Leak Survey is understood f<o be the foHo ing: M.E. Simpson Co., Inc. will furnish all labor, material, transportation, tools, and equipment necessary to survey the water distribution system areas selected by the City. M.E. Simpson Co., Inc. shall be required to provide such skilled and trained personnel and equipment necessary to complete the work herein specified. There will be a minimum of Two Persons per teajim wqLKy) can the survey at all times. Work in an orderly and safe manner to insure protection of the local residents, Utility employees, and the Field Staff so that no avoiaiaViale accidents occur. All Field Staff will have readily observable identification badges worn while in the field. The leak detection equipment to be used will be that which was described in the "Equipment to be used" section. Initially listen to ;all fire h drarats al'l accessibIq,,,q!.�Jq_fine valves, and when necessary, selected service connections in the entire distribution system by making physical contact with the valve, hydrant, pipe, or B-box. (Listening points that are not accessible will be given to the Utility and when corrected they will be listened to.) Listening points of contact will be: valves, hydrants, service valves or meter settings. The preference of listening points in order as follows; direct contact with the pipe, main line valves, hydrant valves, hydrants, then service valves or meter settings. Specific listening distances will be determined by pipe material. Metallic type pipes; no greater than 500' between listening points. Non -Metallic AC/Concrete type pipes; no greater than 300' between listening points. Non -Metallic PVC/HDPE type pipes; no greater than 150' between listening points. A "suspected leak" log shall be maintained indicating all areas where suspected leak noise was heard. This log will be reviewed when the Project Team is verifying the suspected leak area for confirmation of the actual existence of a leak. This log will be a part of the periodic reports turned into the Utility regardless of an actual leak located in the area or not, with a expwiora of the noise source. When leak noise has been detected and or suspected, the Project Team will verify the suspected area a second time to confirm the noise. At least four hours will pass between the initial listening of the area before a second listen and confirmation is attempted. The Project Team will line locate the water main and service lines in the immediate area so the correct pipe distances can be input into the leak correlator and also so that the Water Utility will have an idea of where the water main is located prior to excavation. Non-metallic pipe locations will be "interpolated" as best that can be identified, given the line location of metallic services, Utility knowledge of the area, or other information regarding the actual location of the main.