Specifications include, but are not limited to: Arlington County seeks to enter into an agreement with a vendor that specializes in water loss control. Arlington County is looking to establish long-term water control loss program to identify cost effective, but effective water loss practices. The equipment being sought should be able to pinpoint leaks in the distribution system and document the leakage discovery of leakage volumes so that these leaks can be repaired. The types of equipment that will be evaluated for purchase include, but are not limited to, Sounding Rods, Geophones, Ground Microphones, Leak Correlators, Leak Noise Loggers and High Frequency Pressure Loggers. The pricing shall include equipment, warranty, on-site trainings, online and phone technical support, maintenance and calibration schedule provided by the manufacturers. The following provides a brief description of each of these types of equipment: 1. Simple Leak Noise Probes (Sounding Rods) The fundamental instrument for leak noise surveys is an instrument that uses a probe that conveys sounds to the user audibility or through a monitor or both. Today’s units convey devices that have amplifiers, and they feature insulated headphones and filters to screen out selected frequencies. May units have readout devices to provide a visual measure of the noise (and cover frequencies outside of human hearing). 2. Ground Microphones (Geophones, Ground Microphones) A variation of the probe is a ground microphone that is placed on a flat surface to carry sound without direct water system contact. 3. Leak Noise Correlator The leak correlator is essentially a two-channel microprocessor that measures the time of delay of a leak noise registered at two contact points on the water main. By obtaining leak sounds at two points either side of a suspected leak, the correlator analyzes the leak sounds and, knowing main characteristics that are input by the operator, determines the exact elevation of the leak between the two sensors.