Withybrook, Project Date: 17-18 December 2013

Electro Scan Project Benchmark Presented to Severn Trent Services Birmingham, England

Report Date: 14 January 2014

Soluons About CPS Environmental

Tanker Jeng Surveys (cctv & electro scan) Cleaning Drain Repairs Planned Maintenance CPS Environmental (Nonghamshire, England) is a diversified sewer cleaning, inspecon, and repair company.

Working with Ant Hire Soluons LLC (Leeds, England), CPS Environmental is pleased to present this benchmark Electro Scan Project.

CPS Environmental Head Office: Buckthorpe, Oxton Road, Southwell, Nonghamshire. NG25 0NH Tel: +44 0 1636 812161, Fax: +44 0 1636 691251

Website: www.cpsenvironmental.co.uk 1 About Withybrook

Withybrook is a rural village and civil parish in the English county of with a populaon of roughly 230 people.

The village is located in a valley just west of the old Fosse Way and forms part of the .

2 Project Findings

Soluons

3 Execuve Summary Project Objecve Withybrook is an area that has experienced persistent unexplained high flows. Having been televised on mulple occasions it was a good candidate to test the use of Electro Scan to see if the technology could add value to idenficaon and measurement of sources of infiltraon. Results • Electro Scan not only idenfied a number of potenal sources of infiltraon, not seen by CCTV, but provided an esmated L/S defect flow, ±40% accuracy. • Electro Scan was able to inspect 100% of the lines (23 Sewer Mains + 1 Connecon = 24). By comparison, prior CCTV inspecon recorded six (6) Abandoned Surveys, unable to inspect an average of 29% of the pipe and missing 69% of the sources of infiltraon (p11).

• Total Esmated Leakage of the twenty-three (23) pipes inspected represents 791,187 34.66 l/s, with the seven (7) worst pipe contribung 27.67 l/s eighty percent (80%) of the suspected infiltraon (p 9-10).

Way Forward Given Electro Scan’s ability to rapidly (i.e. 10m/minute for ES-150 and 15m/minute for ES-300) idenfy & quanfy sources of infiltraon, it is recommended that Severn Trent considering the adopon of Electro Scan for all pre- CCTV assessments and to require CCTV contractors to visually inspect all major Electro Scan defects as part of any subsequent CCTV survey. Furthermore, given Electro Scan’s ability to detect leaks to within 1 cm, a similar trial is recommended on post-rehabilitated lines, such as lining, point repair, and new pipe construcon, where Severn Trent as previously relied on visual observaon to cerfy project compleon.

4 Findings & Conclusions

1. Quantave Informaon on Flow Potenal – By Electro Scan – Provides Much More Accurate Conclusions Than Visual Observaons from CCTV Inspecon • Total Esmated Leakage of the twenty-three (23) pipes inspected represents 791,187 gallons per day or 34.66 liters per second (l/s), ±40% accuracy, assuming a 1foot (30.48cm) head and 1% or less pipe slope.

• Seven (7) out of Twenty-Three (23) sewer mains are esmated to contribute 631,504 gallons per day (27.67 liters per second) or eighty percent (80%) of suspected infiltraon into the survey area.

• Two (2) Infiltraon Observaons on the same pipe segment were idenfied (1-Infiltraon Dripping and 1-Infiltraon Seeping) on Pipe Segment From SP43843403 to SP43843301, with no observaons of Infiltraon Running or Infiltraon Gushing, represenng one (1) pipe of twenty- three (23) or 4% of the pilot area.

• Electro Scan idenfied 572 locaons of potenal infiltraon totaling a leakage potenal of 55.09 GPM (35.01 Liters Per Second).

2. CCTV Overlooked an Average of 64% of the Defects in the Pipe Secons Surveyed In extreme cases CCTV missed as much as 92.7% of the defects present in a pipe secon (Secon SP43845104 to SP43845103) 5 Findings & Conclusions Connued 3. Survey Abandonments Seriously Reduce Assessment Accuracy • Forty-two (42) Sewer Main Television Inspecon Reports were Completed or Parally Completed.

• Twenty-three (23) Main Line Segments and one (1) Service Lateral were 100% Completely by Electro Scan; ie. 100% of All Sewers Were Completely Surveyed, with Zero Abandoned Surveys.

• Out of a total of Forty-Two (42) Television Reports, 23 of 42 - or 55% - of Televised Lines Were Reported as an Abandoned Survey.

• Of the Twenty-Three (23) Lines Electro Scanned, CCTV Reported Six (6) - or 26% - Abandoned Surveys ranging from as lile as 1.24% to as much as 88% of pipe secon length le un-surveyed by CCTV due to abandonment.

• For the six (6) lines that were televised and reported an ‘Abandoned Survey,’ reverse set-ups were aempted; i.e. CCTV aempted from both Upstream & Downstream Manholes, but 29% of the total pipe lengths were never evaluated.

• Of the secons of pipe NOT televised due to Abandoned Surveys, 26 Flow Defects (i.e. defects registering an esmated resultant flow) were idenfied by Electro Scan.

• On average, those porons of the pipe secon NOT televised due to Abandoned Surveys contained 63% of the whole pipe length’s infiltraon potenal, despite being only 29.44% of the pipe’s total length. 6 Findings & Conclusions Connued Those porons of the pipe which go 'un-surveyed' due to Abandoned Surveys, are crical points of infiltraon potenal and this a significant poron of the assessment of a pipes cricality is missed when surveys are abandoned. By providing quantave data with 0 survey abandonments Electro Scan is much beer suited to assess a pipe's cricality and infiltraon potenal. Given that 55% of all CCTV surveys in this sub-basin reported abandoned surveys, a very significant amount of data is likely missing from the analysis of this poron of the network. Electro Scan does not replace CCTV, as Electro Scan neither locates defects to a specific clock posion, or is able to idenfy pipe sags or alignment problems. However, Electro Scan does confirm the limited use of television inspecon to find sources of pathways to ground, i.e. infiltraon, automacally and without the drawbacks of visual observaons. By locang anomalies to the closest 1 cm (0.4 in) recording data at the rate of one (1) data point, every ¼ inch, i.e. every 14 milliseconds, Electro Scan can accurately locate and measure defects in non- conducve pipes (e.g. asbestos cement, brick, clay, plasc, reinforced concrete, resin, etc.) in accordance with ASTM F2550-13.

Recommended uses of Electro Scan include the ability to: • Idenfy and measure all sources of infiltraon from cracks, bad joints, and defecve service connecons, • Rank & priorize sewer mains and laterals that should be repaired, relined, or renewed, • Integrate with hydraulic modeling programs to re-calibrate model assumpons based on its esmated liters per second (l/s) of flow from defects, • Cerfy point repairs, relining, and new construcon to ensure that projects performed by third-party contractors are delivered without defects or leaks, prior to Acceptance. While Electro Scan may not be able to disnguish whether leaks are occurring at a service connecon or internal to a service lateral, it will consistently idenfy gaps allowing electrical current to pass from inside the sewer system to ground. 7 8 9 10 11 12 CCTV Surveys All CCTV Reports were completed in accordance with Severn Trent standards following the most recent published WRc guidelines for visual observaons.

NOTE: Given the number of significant defects found by Electro Scan, it is recommended that all prior CCTV reporng for Withybrook be reviewed to determine consistency of observaons, and that Electro Scan defects be reviewed side- by-side with CCTV to determine whether observaons were either missed, obscured due to Debris or Fats, Oils, and Grease, or not able to be visually detected, i.e. at joints. 13 14 Electro Scan Surveys All Electro Scan Reports were completed in accordance with ASTM F2550-13 Standard Pracce for Locang Leaks in Sewer Pipes By Measuring the Variaon of Electric Current Flow Through the Pipe Wall. hp://www.astm.org/Standards/F2550.htm

15 16 17 Withybrook Sewer Plan

18 Electro Scan Project Work Producvity What is Electro Scan? 1. What Does Electro Scan Do, That CCTV Cannot? Answer: Find sources of infiltraon and cracks. Infiltraon is a key factor causing Sanitary Sewer Overflows (SSOs) and Combined Sewer Overflows (CSO) caused by cracks & defects found in manholes, sewer mains, service connecons, and laterals. Given the limitaon of CCTV – i.e. not able to visually find leaks -- Electro Scan automacally finds , locates, and measures (i.e. in gallons per minute) the amount of infiltraon (i.e. in gallons per minute) caused by defects. Electro Scan can also cerfy newly installed, recently repaired and rehabilitated pipe lining.

2. How Does It Work? Sewers are made of non-conducve materials (e.g. asbestos concrete, brick, clay, cement, plasc, reinforced concrete, etc.), so no electrical current should ever be able to “leak” or escape into the ground from inside the pipe – unless, of course, there is a crack or break in a pipe. Electro Scan’s patent-pending technology releases a focused array of low-voltage high- frequency electrical current that locates and quanfies all defects.

3. Who Has Endorsed or Used Electro Scan? Electro Scan has been tested in Electric “Spikes” Show numerous U.S. EPA studies and found superior to CCTV in finding the locaon and Defect Locaons, Intensity & Esmated quanficaon of defects that cause leaks. Electro Scan is the only company with Gallons per Minute. products in compliance with ASTM Standard F2550-06, just approved for another five years by ASTM Commiee F36. Winning internaonal acceptance, Electro Scan has recorded nearly 1 million feet of scans in the U.S., England, Australia, and New Zealand, and represents the next generaon in defect locaon and cerficaon of pipeline repairs & rehabilitaon, able to work in wet weather and dry weather condions. 20 How Electro Scan Finds Defects Missed By Tradional CCTV Inspecon?

Electro Scan Field Data Immediately Uploaded, Processed, Stored, & Displayed.

21 Within Minutes, Data Uploaded to Cloud.

Office Upload if WIFI is Not Available in the Field

Scan Detail Report Authorised Electro

Scan Contractor Withybrook Project

Fire Wall Password, Protected Severn Trent Account

Electro Scan Data Stored on UK-based Cloud Server

Electro Scan From SPSP43843403 To SP43843301

22 Within Minutes, Data Uploaded to Cloud.

Defect Counts Esmated Total Defect Flows.

Tabular Data Available for Export

Scan Graph for Visual Reference*

* Average 100 meters of scanning may provide 15-20,000 data points. 23 Zoom Feature

24 Crical Sewers algorithms calculates the Esmated Defect Flow in L/S (GPM)

But, How Does This Compare to CCTV?

25 SP43843403 to SP43843301 Electro Scan vs. CCTV Side-by-Side

Medium Defect Esmated Flow: 0.0625 LPS

Crack Circumferenal From 07 to 05 O’Clock

26 How Electro Scan Esmate L/P? While Electro Scan’s standard graphs display the Maximum Defect Current, Electro Scan’s esmated Liters per Second (Defect Flow) is based on the Defect Area and the Electric Current sustained over that Area.

Sample Processed Data ‘Large Current Readings over a Large Area’ oen result in a large l/p or Defect Flow, frequently found in defects at a service connecon. In other cases ‘Large Current Readings over a Small Area’ result in small and medium LPS, frequently showing defects at joints.

Electro Scan measures height and width of defect in accordance with F2550-13. 27 Sewer Mains Laterals ES-300 6-60” Diameter Pipes ES-150 3-8” Diameter Pipes

Android

Large Diameters ES-1000 5-10’ Diameter Pipes REQUIRESES-300

US and Internaonal Patents pending. 28 Awards & Recognion • Finalist, Europe’s GreenTec Award for Water & Sewage (Announced May 2014) • The New Economy Clean Tech Award for Water & Wastewater Soluons, December 2013 • PURE Award for Innovaon, South West Water, UK, November 2013 • WEF Innovave Technology Award, October 2013 • Sierra Nevada Innovaon Challenge Clean Tech Award, June 2013 • NASTT/No-Dig Joseph L. Abbo Jr., Award for Best Product Innovaon, March 2013

29 Recent Nominaon

30 30 Withybrook Sewer Main Assessments

Soluons

31 1 SP43845501 to SP43845401

MH 5501 Depth: 1.42m MH 5401 Depth: 1.43m

• 150mm Diameter • Vitrified Clay Pipe 32 CCTV Scan Graph vs. CCTV SB43845501 to SP43845401

33 SP43845501 to SP43845401 Defect Chart

SP43845501 to SP43845401 Scan Summary

34 2 SP43845401 to SP43845402

MH 5401 Depth: MH 5402 1.43m Depth: 1.49m

• 150mm Diameter • Vitrified Clay Pipe 35 CCTV Scan Graph vs. CCTV SP43845401 to SP43845402

36 SP43845401 to SP43845402 Defect Chart

SP43845401 to SP43845402 Scan Summary

37 3 SP43845402 to SP43845301

MH 5402 Depth: 1.49m

MH 5301 Depth: 1.38m

• 150mm Diameter

• Vitrified Clay Pipe 38 CCTV Scan Graph vs. CCTV SP43845402 to SP43845301

39 CCTV Scan Graph vs. CCTV Cont’d SP43845402 to SP43845301

40 SP43845402 to SP43845301 Scan Graph vs. CCTV Close Up

Electro Scan: - Medium Defect Esmated Flow: 0.03667 LPS

CCTV: - No Call Out

41 SP43845402 to SP43845301 Defect Chart

SP43845402 to SP43845302 Scan Summary

42 4 SP43845301 to SP43845302

MH 5301 Depth: 1.38m

MH 5302 Depth: 1.45m

• 150mm Diameter • Vitrified Clay Pipe 43 CCTV Scan Graph vs. CCTV SP43845301 to SP43845302

44 SP43845301 to SP43845302 Defect Chart

SP43845301 to SP43845302 Scan Summary

45 5 SP43845302 to SP43845303

MH 5303 Depth: 1.32m MH 5302 Depth: 1.45m

• 150mm Diameter • Vitrified Clay Pipe 46 CCTV Scan Graph vs. CCTV SP43845302 to SP43845303

47 SP43845302 to SP43845303 Defect Chart

SP43845302 to SP43845303 Scan Summary

48 6 SP43845303 to SP43844201

MH 5303 Depth: 1.32m MH 4201 Depth: 1.39m

• 150mm Diameter • Vitrified Clay Pipe 49 CCTV Scan Graph vs. CCTV SP43845303 to SP43844201

50 SP43845303 to SP43844201 Defect Chart

SP43845303 to SP43844201 Scan Summary

51 7 SP43844201 to SP43844202

MH 4202 MH 4201 Depth: Depth: 1.58m 1.39m

• 150mm Diameter • Vitrified Clay Pipe 52 CCTV Scan Graph vs. CCTV SP43844201 to SP43844202

53 SP43844201 to SP43844202 Defect Chart

SP43844201 to SP43844202 Scan Summary

54 8 SP43844202 to SP43845201

MH 5201 Depth: 1.52m MH 4202 Depth: 1.58m

• 150mm Diameter • Vitrified Clay Pipe 55 CCTV Scan Graph vs. CCTV SP43844202 to SP43845201

56 SP43844202 to SP43845201 Defect Chart

SP43844202 to SP43845201 Scan Summary

57 9 SP43845201 to SP43845104

MH 5201 Depth: MH 5104 1.52m Depth: 1.26m

• 150mm Diameter

• Vitrified Clay Pipe 58 CCTV Scan Graph vs. CCTV SP43845201 to SP43845104

59 SP43845201 to SP43845104 Defect Chart

SP43845201 to SP43845104 Scan Summary

60 10 SP43845104 to SP43845103

MH 5104 Depth: MH 5103 1.26m Depth: 1.48m

• 150mm Diameter • Vitrified Clay Pipe 61 CCTV Scan Graph vs. CCTV SP43845104 to SP43845103

62 SP43845104 to SP43845103 Defect Chart

SP43845104 to SP43845103 Scan Summary

63 11 SP43845003 to SP43845103

MH 5103 Depth: 1.48m

MH 5003 Depth: 1.12m

• 150mm Diameter • Vitrified Clay Pipe 64 CCTV Scan Graph vs. CCTV SP43845003 to SP43845103

65 SP43845003 to SP43845103 Defect Chart

SP43845003 to SP43845103 Scan Summary

66 12 SP43845103 to SP43845102

MH 5102 Depth: 2.49m

MH 5103 Depth: 1.48m

• 150mm Diameter • Vitrified Clay Pipe 67 CCTV Scan Graph vs. CCTV SP43845103 to SP43845102

68 SP43845103 to SP43845102 Scan Graph vs. CCTV Close Up

Electro Scan: - Small Defect Esmated Flow: 0.0095 LPS

CCTV: - No Call Out

69 SP43845103 to SP43845102 Defect Chart

SP43845103 to SP43845102 Scan Summary

70 13 SP43845102 to SP43845101

MH 5101 Depth: 2.56m MH 5102 Depth: 2.49m

• 150mm Diameter • Vitrified Clay Pipe 71 CCTV Scan Graph vs. CCTV SP43845102 to SP43845101

72 SP43845102 to SP43845101 Defect Chart

SP43845102 to SP43845101 Scan Summary

73 14 SP43845101 to SP43845105

MH 5105 Depth: 3.04m

MH 5101 Depth: 2.56m

• 150mm Diameter • Vitrified Clay Pipe 74 CCTV Scan Graph vs. CCTV SP43845101 to SP43845105

75 SP43845101 to SP43845105 Defect Chart

SP43845101 to SP43845105 Scan Summary

76 15 SP43845001 to SP43845105

MH 5105 Depth: 3.04m

MH 5001 Depth: 1.82m

• 150mm Diameter • Vitrified Clay Pipe 77 CCTV Scan Graph vs. CCTV SP43845001 to SP43845105

78 SP43845001 to SP43845105 Defect Chart

SP43845001 to SP43845105 Scan Summary

79 16 SP43846101 to SP43845001

MH 6101 Depth: 1.39m

MH 5001 Depth: 1.82m

• 150mm Diameter • Vitrified Clay Pipe 80 CCTV Scan Graph vs. CCTV SP43846101 to SP43845001

81 SP43846101 to SP43845001 Scan Graph vs. CCTV Close Up

Electro Scan: - Medium Defect Esmated Flow: 0.2517 LPS

CCTV: - No Informaon Survey Abandoned Due to Debris

82 SP43846101 to SP43845001 Defect Chart

SP43846101 to SP43845001 Scan Summary

83 17 SP43846001 to SP43846101

MH 6101 Depth: 1.39m

MH 6001 Depth: 1.11m

• 150mm Diameter • Vitrified Clay Pipe 84 CCTV Scan Graph vs. CCTV SP43846001 to SP43846101

85 SP43846001 to SP43846101 Scan Graph vs. CCTV Close Up Electro Scan: - Large Defect Esmated Flow: 5.22 LPM - Medium Defect Esmated Flow: 0.0625 LPS

CCTV: - No Call Out

86 SP43846001 to SP43846101 Defect Chart

SP43846001 to SP43846101 Scan Summary

87 18 SP43843501 to SP43843401

MH 3501 Depth: 1.41m

MH 3401 Depth: 1.4 m

• 150mm Diameter • Vitrified Clay Pipe 88 CCTV Scan Graph vs. CCTV SP43843501 to SP43843401

89 SP43843501 to SP43843401 Defect Chart

SP43843501 to SP43843401 Scan Summary

90 19 SP43843401 to SP43843402

MH 3401 Depth: 1.4m MH 3402 Depth: 1.48m

• 150mm Diameter • Vitrified Clay Pipe 91 CCTV Scan Graph vs. CCTV SP43843401 to SP43843402

92 SP43843401 to SP43843402 Scan Graph vs. CCTV Close Up Electro Scan: - 2 Medium Defects Esmated Flows: 0.6057 LPS & 0.036 LPS

CCTV: - Crack Longitudinal@ 11 O’Clock

93 SP43843401 to SP43843402 Defect Chart

SP43843401 to SP43843402 Scan Summary

94 20 SP43843402 to SP43843403

MH 3402 Depth: 1.48m

MH 3403 Depth: 1.42m

• 150mm Diameter • Vitrified Clay Pipe 95 CCTV Scan Graph vs. CCTV SP43843402 to SP43843403

96 SP43843402 to SP43843403 Scan Graph vs. CCTV Close Up

Electro Scan: - Small Defect Esmated Flow: 0.017 LPS

CCTV: - No Call Out

97 SP43843402 to SP43843403 Defect Chart

SP43843402 to SP43843403 Scan Summary

98 21 SP43843403 to SP43843301

MH 3403 Depth: MH 3301 1.42m Depth: 1.56m

• 150mm Diameter • Vitrified Clay Pipe 99 CCTV Scan Graph vs. CCTV SP43843403 to SP43843301

100 SP43843403 to SP43843301 ELECTRO SCAN v. CCTV INSPECTION

Electro Scan: - Small Defect Esmated Flow: 0.0625 LPS

CCTV: -Crack Circumferenal From 07 to 05 O’Clock

101 SP43843403 to SP43843301 Defect Chart

SP43843403 to SP43843301 Scan Summary

102 22 SP43843301 to SP43844301

MH 4301 MH 3301 Depth: Depth: 1.47m 1.56m

• 150mm Diameter • Vitrified Clay Pipe 103 CCTV Scan Graph vs. CCTV SP43843301 to SP43844301

104 SP43843301 to SP43844301 Defect Chart

SP43843301 to SP43844301 Scan Summary

105 23 SP43844301 to SP43844201

MH 4201 MH 4301 Depth: Depth: 1.39m 1.47m

• 150mm Diameter • Vitrified Clay Pipe 106 CCTV Scan Graph vs. CCTV SP43844301 to SP43844201

107 CCTV Scan Graph vs. CCTV Cont’d SP43844301 to SP43844201

108 SP43844301 to SP43844201 Scan Graph vs. CCTV Close Up

Electro Scan: - Medium Defect Esmated Flow: 0.02017 LPS

CCTV: - No Call Out

109 SP43844301 to SP43844201 Defect Chart

SP43844301 to SP43844201 Scan Summary

110 Withybrook Private Sewer Lateral Assessment

Soluons

111 24 C4 to SP43845003

MH 5003 Depth: 1.12m

C4

• Not A Main Line – A Connecon • 100mm Diameter

• Vitrified Clay Pipe 112 C4 to SP43845003 Scan Graph

113 C4 to SP43845003 Defect Chart

C4 to SP43845003 Scan Summary

114 Supplemental Informaon

Soluons

115 Ž

 anyme, anywhere global cloud   ’ Electro Scan Data Export

Œ ‘

116 • Real Time Data Capture • Raw, Unprocessed Data • 1 Data Point, Every ¼ in, every 14 milliseconds • Visual Studio 2012, .NET 4.5, C#, LINQ • SQL Server 2008R2 Backend Database

• Global Service – Anyme, Anywhere • Amazon S3 Plaorm • Unlimited Scalability • Receives Uploaded Data from the Field

• Five (5) 64-bit Electro Scan Cloud Servers • Windows SQL Server 2012, Hosted Tableau • Web Services, C# Programming • Database Retrieval, Processing, and Storage

• HTML 5.0 • Python • PHP • Embedded Tableau

117 Hall B-5

Hall B5, Booth #111-120

World’s Leading Trade Fair for Water, Sewage, Waste & Raw Materials Management

May 5-9, 2014 Messe München www.ifat.de See Our European Demonstraon Van 118 References 1. US EPA Sewer Electro Scan Field Demonstraon Revisited, Special Reprint from 2012 WEFTEC Conference Proceedings hp://www.electroscan.com/wp-content/uploads/2012/11/WEFTEC_US- EPA-Electro-Scan-Demonstraon-Project.pdf

2. ASTM Standard F2550-13 hp://www.electroscan.com/wp-content/uploads/ 2012/01/2006-02-01-Electro-Scan_ASTM-Standard- F2550-06.pdf

3. Electro Scanning Technology Adds Another Layer of Inspecon, Trenchless Technology Magazine, Published February 2013 hp://www.electroscan.com/wp-content/uploads/2013/03/Trenchless- Technology-Mag_ES-Tech-Adds-Another-Layer-of-Inspecon.pdf

4. Electro Scan Technology Test Drive, Municipal Sewer &Water Magazine, December 2012 hp://www.electroscan.com/wp-content/uploads/2012/11/Electro- Scan_Technology-Test-Drive.pdf

5. Electro Scan Newspapers hp://www.electroscan.com/newspapers/

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