Why Conserve Water? REAL LOSSES? 8/27/2015. Leak Detection: State of the Art Practices. Legislation/Water abstraction Regulations

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1 Leak Detection: State of the Art Practices Simon Wick VP Matchpoint Water Asset Management Why Conserve Water? Legislation/Water abstraction Regulations Reduce water loss (volume) Financial gain For our children of tomorrow (Over 2.5X more people lack access to clean water than live in the United States) REAL LOSSES? Leakage on Transmission & Distribution Mains Leakage on Overflows at Utility's Storage Tanks Leakage on Service Connections up to Point of Customers Metering 1

$NRW Recovery/Leak Detection methods District Metered Areas (DMA s) Acoustic Sounding Acoustic Nosie Loggers Correlators (real and no real time)\ Hydrophone Sensors Gas Injection Intrusive DMA s$

2 Confused? Which direction to go? NRW Recovery/Leak Detection methods District Metered Areas (DMA s) Acoustic Sounding Acoustic Nosie Loggers Correlators (real and no real time)\ Hydrophone Sensors Gas Injection Intrusive DMA s Should you consider DMA Management? Consideration for your system: Age of pipe Type of pipe Urban or rural NRW Data accuracy Size of utility DMA structure required Consideration for your personnel: availability, skill level, training required or contract out services Address Apparent Losses: Paper/data inaccuracies and/or meter inaccuracies 2

3 How Do You Manage Water Effectively? The most effective way to manage water is to divide your network into DMA s. IN How Do You Manage Water Effectively? Each DMA typically contains less than 1,500 properties. These are known as District Metered Areas (or DMA s). DMA 2 DMA 1 IN DMA 3 How Do You Manage Water Effectively? Water entering each DMA is monitored and logged (GPRS technology now available) and the data is used to calculate usage within the DMA. Unexpected increases in water can indicate potential leakage. DMA 2 IN DMA 1 DMA 3 3

How Do You Manage Water Effectively? GPRS dataloggers can provide 15 minute, or less, Pressure and Flow Data. This can be displayed in text or graph format for each meter and each DMA.

4 How Do You Manage Water Effectively? GPRS dataloggers can provide 15 minute, or less, Pressure and Flow Data. This can be displayed in text or graph format for each meter and each DMA. This data will be sent every day, and alarms sent at every event, to assist with the management of your distribution system. Minimum Night Flow (MNF) How Do You Manage Water Effectively? Each DMA can now be easily audited on a monthly basis with the aid of AMR/fixed base technology, ensuring leak detection work is carried out in the areas needed. DMA 1 DMA 3 IN DMA 2 White House UD, TN USA Case Study 4

Historically WHUD have used flows from SCADA Seven

Metering Zones too large still too much area, too

Phase 1: 25 New Insertion meters for eight new DMA

5 Historically WHUD have used flows from SCADA Seven Metering Zones to Track Water Loss Progress Metering Zones too large still too much area, too many pipes/connections, no way to easily split Phase 1: 25 New Insertion meters for eight new DMA s. In addition 4 x existing SCADA meters were used for 4 more DMA s 5

6 Phase 1: Can create dozens of new Sub DMA s by temporarily closing valves and/or Step Testing GIS improvements GIS improvements 6

GIS improvements SUMMARY Leaks have been identified and confirmed by a mix of DMA Analysis, Step-Testing, Acoustic Logging and standard leak detection practices To date 73 x leaks have been confirmed

00 per month or $919,800.00! SUMMARY You can use your existing system (doesn t have to be a closed system) Repeatability of flow and pressure data is the key!

7 GIS improvements SUMMARY Leaks have been identified and confirmed by a mix of DMA Analysis, Step-Testing, Acoustic Logging and standard leak detection practices To date 73 x leaks have been confirmed in the 12 x DMA s. Leaks varied from 1 GPM to over 100 GPM with an average of 15 GPM These leaks total in excess of 1000 GPM These leaks add up to a saving of $2, per day or $75, per month or $919,800.00! SUMMARY You can use your existing system (doesn t have to be a closed system) Repeatability of flow and pressure data is the key! Flow AND Pressure data are both critical Know your system- DMA implementation will help this Compliments and focus s all leak detection activates and the actual GPM of any leak easily calculated GIS integration is key A DMA Management program is just that it allows you to Manage your system. You have a system to rely on for the future! 7

Localize The best products to localize any leak are Acoustic Noise Loggers and/or a ground microphone These are used throughout various points of a network and listen for leaks You can gauge how

survey large areas of network quickly and effectively Fully automatic intelligent logger PROVEN sensor to be the most sensitive in today s market Adaptable to all network situations Innovative design

8 Localize The best products to localize any leak are Acoustic Noise Loggers and/or a ground microphone These are used throughout various points of a network and listen for leaks You can gauge how close you are to a leak by the Db (Volume) and intensity of the noise Leak Localization Acoustic Noise Loggers Intelligent noise loggers designed for permanent deployment or tactical deployment to survey large areas of network quickly and effectively Fully automatic intelligent logger PROVEN sensor to be the most sensitive in today s market Adaptable to all network situations Innovative design for rapid deployment Compact size Low unit cost Long battery life (5 years) Flexible Data Collection options: Lift and Shift Drive-By Fixed Base via GPRS 3 options for deployment: Localize (cont.) Lift N Shift (low initial equipment costs, labor intensive) Drive-by (higher initial equipment costs, less labor required and quicker surveying times achieved compared with Lift N Shift) FIXED BASE (higher initial costs again but all data is controlled from your office and flow/leak data can be analyzed to increase efficiency). 8

Loggers must be placed much closer together on PVC Leak Localization Noise Logging Each logger will listen for leak noise and transmit an alert if a

9 Leak Localization Noise Logging Noise loggers can be quickly positioned at intervals throughout the DMA to detect the noise created by leaks. They are easily deployed on valves using magnets and can be placed permanently or moved from site to site with no interruption to the water supply. Loggers must be placed much closer together on PVC Leak Localization Noise Logging Each logger will listen for leak noise and transmit an alert if a leak is suspected. Leak Localization FIXED BASE Benefits of fixed base leak detection network: Automatic leak alarm Immediate response Critical areas under control 9

data can be analyzed to increase efficiency.

Pinpointing Leaks Most leaks in any water system make a noise With our products and/or

leaks on metallic pipe are generally easier to locate than leaks on plastic Approx.

10 Localize Cont d. Fixed base (higher initial costs) but all data is controlled from your office and flow/leak data can be analyzed to increase efficiency. Labor is only required to pinpoint and confirm leaks. GIS integration its coming! Localize Cont d. Pinpointing Leaks Most leaks in any water system make a noise With our products and/or services the leaks are located by hunting this noise Some leaks are easier than others - leaks on metallic pipe are generally easier to locate than leaks on plastic Approx. 50% of all water leaks on any undergrounds system are not visible from above ground To pinpoint a leak, use a Correlator, which computes where a leak is based how long the sound takes to reach each of the 2 sensors, as shown below: 10

Leak Detection Pinpointing- Correlation NEW Eureka 3 Leak Noise Correlator Enigma Compact Correlating Noise Loggers Enigma Correlating Noise Loggers Enigma Hy-Q Correlating Noise Loggers Real Time

11 Leak Detection Pinpointing- Correlation NEW Eureka 3 Leak Noise Correlator Enigma Compact Correlating Noise Loggers Enigma Correlating Noise Loggers Enigma Hy-Q Correlating Noise Loggers Real Time Advanced sensors GPS Capability Touch Screen Reporting ability Application based Easy to use Rechargeable Case Non real time Ability to log data overnight Easy to deploy IP68 Infra Red download No need to recharge For rapid deployment Infra Red download Fast deployment Custom recording up to 8 pods per kit Advanced Multipoint Correlations PVC/Large diameter Pipes Ability to log overnight Multipoint correlation Infra Red Download Pinpointing Leaks on PVC Pipe Method of Pinpointing on Plastic (and/or Large) pipes: Correlation, with Hydrophones: better results than traditional sensors Correlation Result on PVC City of Raleigh, NC: 886ft 12 PVC FH used to simulate a leak Correlator was 2.8ft off target using the Enigma HyQ (Hydrophones) Peak Logger 1 Logger 2 Pipe details Leak Position 11

12 Confirm Confirm where a leak is by looking, turning off and on valves and by using a ground microphone Without confirming, dry holes could be produced wasting time and money for the utility GAS LEAK DETECTION? Gas Leak Detection Principle 95% N2 5% H2 Leak 12

Gas Leak Detection BEST USES FOR GAS TRACKING: Where accoustic devices are not optimal Plastic pipes Long pipes without access Building intrenal pipes - our customers: plumbers Pipe commissioning :

13 Gas Leak Detection BEST USES FOR GAS TRACKING: Where accoustic devices are not optimal Plastic pipes Long pipes without access Building intrenal pipes - our customers: plumbers Pipe commissioning : compressed air and hydrogen mixture Leak Detection Pinpointing- Intrusive for Large/Trunk Mains Transmission Mains are extremely difficult to survey effectively Walking the mains is a low cost option Acoustic (non Intrusive) sounding has limited results. Results can be achieved by Correlation but it has limitations BUT more reliable results are obtained via intrusive methods (service option only and very expensive when compared with traditional methods) Leak Detection Pinpointing- Intrusive for Large/Trunk Mains Transmission Mains - LDS1000 > 12 Superior Camera technology (designed for large bore) 60 Dia. Electronic drive system and drum 3,200 Maximum Distance (with flow) Capable of travel with very low flow On board leakage technology Access through: Fire Hydrants Sahara chambers Air Valves Quadrina s Gate Valves Pressure Tapings 24 Dia. 13

14 Deliverables What about after the survey? How do I continue to monitor for leaks on my transmission mains? Consider: 1. Permanent Acoustic Monitoring System 2. Insertion Flow Meters 3. Combination of 1&2 Other systems available to help you Transient Logging Flow Modulating Pressure Management Pressure/Flow logging 14

THE NEXUS OF LEAK DETECTION & ASSET MANAGEMENT

THE NEXUS OF LEAK DETECTION & ASSET MANAGEMENT AN INNOVATIVE AND EFFICIENT APPROACH IN SAN MARCOS, TX & SAN JUAN, PR Wayne Pratt WPratt@wachsws.com (847) 946-5907 Agenda Leak Detection Key Drivers Methodology