THE NEXUS OF LEAK DETECTION & ASSET MANAGEMENT

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1 THE NEXUS OF LEAK DETECTION & ASSET MANAGEMENT AN INNOVATIVE AND EFFICIENT APPROACH IN SAN MARCOS, TX & SAN JUAN, PR Wayne Pratt (847)

2 Agenda Leak Detection Key Drivers Methodology City of San Marcos, TX City of San Juan, PR Project Overviews Conclusions

3 Key Drivers to Leak Detection

4 Key Drivers: Non Revenue Water

5 Key Drivers: Revenue

6 Key Drivers: Regulation 6

7 Key Drivers: Drought San Marcos, TX

8 Key Drivers: NRW (San Juan) System Input Volume 598 MGD (826 Mm 3 ) Authorized Consumption 255 MGD (352 Mm 3 ) 43% Water Losses 343 MGD (473 Mm 3 ) 57% Billed Authorized Consumption 246 MGD (341 Mm 3 ) 41% Unbilled Authorized Consumption 8 MGD (12 Mm 3 ) 1% Commercial Losses 56 MGD (77 Mm 3 ) 9% Physical Losses 287 MGD (396 Mm 3 ) 48% Revenue Water 246 MGD (341 Mm 3 ) 41% Non-Revenue Water 351 MGD (485 Mm 3 ) 59%

9 Nexus of NRW & Asset Management NRW Non Revenue Water 1. Real Water Loss 2. Apparent Water Loss 3. Asset Registry 4. Information Usability Improvements 5. Asset Usability Analysis Asset Management

10 Leak Survey Methodology Leak Sounding Identify areas of suspected leakage GPS surface assets Document asset and mapping discrepancies Populate Suspect Leak Features Survey Line Features Survey Point Features

11 Survey Data Capture: Project Tracker Mobile GIS Platform Ipad/Smartphone collection via Arc GIS Online Ability to view Project Tracker Not an Ipad App. Client can view Real Time Data Collection Data

12 Survey Data Capture: Project Tracker

13 Survey Data Capture: Project Tracker

14 Survey Data Capture: Project Tracker

15 Survey Data Capture: Project Tracker

16 Survey Data Capture: Project Tracker

17 Survey Data Capture: Project Tracker

18 Survey Data Capture 18

19 Digital Leak Report L E A K R E P O R T ADDRESS NONE STREET YARRINGTON ROAD PROJECT SAN MARCOS REGION SOUTH FACILITY ID REPORT No. WWS COORDINATES CROSS STREET IH 35 SERVICE ROAD DATE/ TIME 2/2/2015 2:34:29 PM CLASSIFICATION 2 STATUS ACTIVE LEAK TYPE HYDRANT LEAKING GPM 10 VISUAL WATER YES PIPE SIZE 6 PIPE MATERIAL DIP DEPTH SURFACE COVER GRASS MANUFACTURER AMERICAN DARLING Feet 500 q ACOUSTIC YES CORRELATION NO TECHNICIAN LOCATION NOTES 100 YARDS WEST OF INTERSECTION FIELD NOTES NONE MARKED YES WACHS WATER SERVICES

20 Project Deliverables GIS plot of Leak Survey Assets GIS plot of Confirmed Leaks Digital Leak Reports with photograph GIS plot of Asset Defects GIS plot Mapping discrepancies Project Summary and Final Report

21 City of San Marcos TX Population 60,000 Aquifer water supply One treatment plant FY MGD 200 miles water distribution Proactive leak detection program every year, multiple years Using contracted services San Antonio Austin San Marcos

22 Project Scope San Marcos Leak survey Valve inventory and assessment Hydrant inventory and assessment GIS updates Leak location Leak attributes Reporting

23 Project Area

24 Project Overview San Marcos 75 miles Acoustic Leak Detection Survey 3,742 Survey Points Surface asset GPS and condition Identification of asset & mapping defects Delivery of digital leak reports and asset data 24

25 Survey Results San Marcos 80 documented leaks 32 leaks not surfacing 164 gallons / minute 236,160 gallons / day 86,198,400 GPY 130 Olympic Swimming Pools! $108,609 in savings annually!

26 Percentage of Leak by Type - SM

27 Volume of Leaks: Type (GPM) - SM # of assets sounded # of leaks found Average GPM of each leak Total GPM of leaks Total GPD of leaks Total GPY of leaks Hydrant ,720 46,252,800 Meter 2, ,160 20,498,400 Service ,200 15,768,000 Valve ,880 1,051,200 Air release/blow off ,400 5,256,000 Main , ,600 Total 3, ,800 89,352,000

28 Volume of Leaks: Pipe Material

29 Asset Defects - SM

30 Asset Defects

31 Map Discrepancies 159 Assets not on GIS

32 PRASA Puerto Rico 5,090 Employees Service Area 3,535 square miles 1,242,465 Clients Water: 97% Sewer: 59% 8 Dams 119 Water Treatment Plants Production = 598 MGD Capacity = Approx. 650 MGD 52 Wastewater Treatment Plants Sewer treated = 244 MGD More than 3,500 ancillary facilities: Water Storage Tanks (1,486) Pump Stations (1,778) Wells (269) More than miles of pipeline island wide Water Sewer

33 The San Juan Project 7,000 miles in 18 months Metro Region 2,000 miles East and North Regions 1,500 miles each South and West Regions 1,000 miles each Areas Rotated every few weeks Surveyed 6,256 miles

34 Survey Results San Juan, PR 2,546 leaks pinpointed, estimated loss 16.9 MGD 310 incidents of potential theft identified 193,514 survey records (~40 per mile) 34

35 Survey Results San Juan, PR

36 Valve Usability Findings

37 Fire Hydrant LD Survey 53% not in GIS

38 Leak & Gas Pocket Detection

39 Non-Tethered Leak & Gas Pocket Detection Launch & Retrieve in Live Flow Through 4-inch Access

40 SmartBall Acoustic Leak & Gas Pocket Detection

41 Sahara Deployment

42 Sahara Deployment

43 Medium Resolution Electromagnetics

44 Leak & Gas Pocket Detection Over 70% of all gas pockets detected in force mains are not at known high points.

45 Nexus of NRW & Asset Management NRW Non Revenue Water 1. Real Water Loss 2. Apparent Water Loss 3. Asset Registry 4. Information Usability Improvements 5. Asset Usability Analysis Asset Management

46 Conclusions Efficient Leak Detection Process External Small Diameter Internal Large Diameter Water Loss Reduction Revenue Recovery Accurate Data Collection Improved Asset Inventory Updated Mapping Records

47 Wayne Pratt (847)

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