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Client Name: City of Santa Ana I AMI FFASIBIUTY REPORT 4. Master Meter and Neptune 3/4 -inch meters probably do not need to be changed out immediately, whereas the Hersey meters of the same size will likely need to be replaced. However, there are a large number of meters that have failed within the testing programs and so it is likely easiest to replace all the meters rather than conducting more detailed review as a replacement program is implemented. Since a number of the meters were over -recording slightly in their intermediate range, it is certainly possible that the City will find that there will not be significant increase in revenue from the meter change out at an individual customer level. Table 10 Meter Replacement Based on Tests 5/8" 31,372 3/4" 468 - - - -- - V 939 11/2" 856 2' 387 Table 10 shows the total number of meters to be replaced based on the meter test results. The test may not have included all types of meters based on vendor and size. Still the test results are indicative that a large number of meters need to be replaced (34,022 out of 44,565 which is 76% of total meters). In later part of the report (10.1.1 Project Cost), cost analysis is done based on the assumption that 6,826 meters which are 10 years or less will not be replaced (but will be upgraded to AMI meters) and rest of the meters will be replaced. This is explained in detail later in the report as to how this decision was arrived at and why it is critical. However, for the sake of analysis we may assume that only 34,022 meters will be replaced and remaining 10,543 meters will be upgraded (based on the meter test results). These 10,543 meters will include 6,826 meters which are less than 10 years old (and it is already decided not to replace them based on age criteria) and probably in a good condition compared to other meters. The remaining 3,717 meters which are not to be replaced are over 10 years old and their condition is not well known. It is not recommended to upgrade these meters. However, we make a brief comparison of the two cases where 6,826 meters are to be upgraded (as shown in detailed case in 10.1.1 Project Cost) and 10,543 (incremental saving for 3,717 meters) to be upgraded. This comparison is done for analysis only and the second case is not recommended as it may not turn out to be cost effective due to increased costs later on to replace meters within a short period. BLACK & VEATCH I Current Metering Platform 25G-133 15