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AMI Feasibility Report I Client Name: City of Santa Ana <br />to drive a vehicle and raise the level of risk to the driver and any pedestrians on the meter reading <br />route. <br />The use of lithium batteries will reduce the costs for disposal and lessen the impact of the project <br />on the environment, as opposed to older lead acid batteries. <br />9.2 VALUE ADDED SERVICES <br />The value added services include not only leakage detection on the customer side of the meter, but <br />also the ability to more accurately measure and audit the water supply on the supply side of the <br />meter. <br />9.2.1 Customer Side Services <br />Additional value can be provided by utilizing an MDMS that can actively assess the data from the <br />AMI system and provide meaningful data to the customers. One example of this is the leak reports <br />provided by many of the newest meters and their associated MTUs. Other examples would be <br />identification and reporting of high usage, zero or low consumption (defective meters), backflow <br />etc. <br />9.2.1.1 Customer Side Leakage Detection <br />The City currently provides relief to water customers for leaks as discussed earlier. This is a once in <br />a 3- year period relief by changing the water rate tier. With bi-monthly meter readings leaks can <br />exist for months before even detected. Then, customers receive a larger than normal water bill and <br />call to complain. The AMI system has the potential to addresses these issues by notifying customers <br />via email/text messaging when higher than normal water use is detected rather than after a large <br />water bill is received. This allows the customer to take action and the City to have less exposure to <br />uncompensated unbilled water revenue. <br />To highlight how the AMI system detects potential customer side leak conditions, Figures 13 and 14 <br />show two graphs of a daily use pattern - the first with no leaks and the second with a potential leak. <br />160 <br />140 <br />120 <br />G <br />R SOU <br />80 <br />60 <br />40 <br />20 <br />40 <br />Residential Customer - No Leaks <br />1 2 3 4 5 6 7 8 9 30 11 12 13 14 15 16 17 18 19 20 21 22 23 24 <br />Hours <br />25G-158 <br />