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Proposal <br />Comnrehensive Water Distribution System Audit <br />Depending on the size of the elevated tank, a very large <br />leak may be required to permit detedion bythis method. <br />For instonce, a rypical 500,000-gallon elevated tank has <br />a bowl with a 55-foot diameter. The bowl volume is 17,111 <br />gallons per foot, and if a one-faot draw down is needed in <br />a rivo-hour time, the minimum leakage rate that can be <br />deteded is 150 gpm. For a 1 MG elevoted tank with a 70- <br />foot diameter bowl, the minimum leak detedion rate would <br />6e 250 gpm. <br />An alternative method is to iwlate porfions of the distribution <br />system and pressure test the system with a portable pump <br />and water storage tank. The pump can be conneded diredly <br />to the outlet on anyfire hydrant, and the leakage measured <br />reasonable preciselywith a conventional water meter. <br />Once the areas with high leakage potential have been <br />identified, sonic leak detedion methods will be employed to <br />confirm the locations of mojor leaks. <br />Review Of Billing <br />Procedures <br />The Carter & Burgess management cansulting staff will <br />review the ezisting billing system with the abjedives af: <br />* IdentityinginadiveaccauntsthatoreaUuallyactive. <br />* Determiningthesmallusers. <br />* Identifying the large users, and checking the meter <br />size. <br />* Identifying duplicate ocrounts. <br />* Identifying unbilled customers, and determining how <br />to colled revenue. <br />Additionally, the metered revenues, meter routes, meter <br />schedules, etc. will be carefully reviewed and evaluated, <br />and farter 8 Burgess will prepare recommendations on <br />improvements to the system. <br />Meter and Billing <br />Activities Review <br />* Determinetheeztentofandreasonsforunaccounted <br />for water. <br />• Gather dato on "noncustomer" metered/non- <br />metered flows to occount for uses nat billed to <br />customers such as main flushing, fire usage, sewer <br />deoning, hydrant testing, and other municipal <br />adivity usage. <br />• Compare customer metered consumption with <br />purchased woteramounts on a monthly, quarterly, <br />and annual basis noting any changes in <br />comparative data during peak and non-peak <br />periods. <br />• Determine the remaining unaccounted for water <br />amaunt afrer considering estimates of the known <br />uses noted above. <br />• Consider sedioning-off selected portions of the <br />distribution system for more detailed analysis of <br />unacrounted for water if warwnted bythe obove <br />analysis. <br />* Review the procedures and processes of managing <br />meter adivities. <br />Gather data on: <br />- metered cansumptian by customer class <br />- meter sizes by customer class <br />- meter routes and number of ineters per route <br />- rypes and oge of ineters bysize currently active in <br />the system <br />Review data ond evaluate meter replacement poliry, <br />route efficienry, effediveness of ineters by rype and <br />brand, ond repair versus reploce policy. <br />Provide a costand benefit evaluation ofa scheduled <br />replacementand resizing program. <br />Review capabilities of the current u61iry billing <br />system and the interface tothe meter readingsystem. <br />! <br />Carter.=Burgess 19 <br />~ <br /> <br />