1. Alex Churchill

2.  What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary WWETT 2015 2

3.  Overflows are a Symptom – Not the Problem 3 WWETT 2015

4. Example Charlotte, North Carolina ~4 miles Five Year Overflow Record – Different Color / Year 4 WWETT 2015  Overflow locations – “Random”  >90% in pipes less than 12”  Historical GIS – Helpful – But Insufficient  Where & When to Deploy Cleaning Resources  Cost Effective & Timely Condition Information

5. 1020304050607080 0 5 10 15 20 25 % System Cleaned Annually Overflows / 100mi Charlotte 2 5 WWETT 2015 16 Municipalities Cleaning vs. SSO Occurrence Getting to 2 SSO’s/100 miles requires 76% cleaning on average

6.  Target Historical Problematic Areas ◦ >70% Pipes Essentially Clean ◦ <10% Need Immediate Action  Cleaning a Clean Pipe ⇒ Wastes Resources  Not Cleaning a Dirty Pipe ⇒ SSO Acoustic Inspection Results ~6 Million Feet of Pipe WWETT 2015 6

7.  What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary WWETT 2015 7

8. 8  CCTV/Robotic Camera  Pipe Profiling / Robotic Multi-Sensor  Push Camera  Zoom Camera  Acoustic  Manhole Inspection

9.  What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary WWETT 2015 9

10.  Patented technology  Gravity-fed sewer focus  Developed in Charlotte with CMUD as key partner 10  Over 12M feet inspected  Rapid assessment helps better focus cleaning and CCTV resources WWETT 2015

11.  How Does it Work? Transmitter “Yells” Receiver “Listens” 11 WWETT 2015

12.  No Flow Contact / No Confined Space Entry  Simple to use – train operators in minutes  Low Cost–Pennies/foot  Rapid Onsite Results – Under 3 min./segment  Portable < 30 lbs  GIS Integration – GPS Enabled  Archive Pipe Segment Blockage Assessments 12 WWETT 2015

13. 13 10 5 0 8 2 Obstructed No Obstructions Root Fibers Limited Growth Grease Limited Build Up Root Fibers and/or Grease Robot Can Pass Through Root Fibers and/or Grease Robot Cannot Pass Through Acoustic ScoreCCTV Comparison WWETT 2015

14. Blockage Assessment 10 Blockage Assessment 7 Blockage Assessment 5 CCTV Robot was Able to Pass Through Root Fibers Blockage Assessment 2 14

15. 15  Sewer Line Data Organizer – SL-DOG  Downloads SL-RAT data  First step in enabling Condition Base Maintenance  Productivity Management  Measurement QA  Visualize results in Google Earth or export to Excel  Facilitates management of multiple devices WWETT 2015

16. 16

17. WWETT 2015 17 Legend: SL-RAT In Field Pipe Assessment 0: 1-3: 4-6: 7-10:

18.  What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary WWETT 2015 18

19. Founded 1822 Combined operations with Richmond County in 1996 Population Served 190,000 19 1,040 miles of sewer Covers 280 square miles Under GA EPD Consent Order WWETT 2015

20.  Needed to get “outside the box” to meet the requirements of the Consent Order  Needed to get a handle on SSO performance  Hence, needed to get an overall snapshot of their system  SL-RAT provided a simple low-cost solution with CBM capability 20 Augusta-Richmond County Service Area WWETT 2015

21.  3 SL-RAT’s – purchased between 2/13 and 2/14  Run with 2 person crews per SL-RAT  Averaging ~7500 feet PER 8 hour crew day  Plan out inspection areas based on tax-maps  Combined with manhole inspection program  Acoustically screening entire system ~ 1x per year 21 WWETT 2015

22. QA Cleaning Fix GIS Issues Update Records Schedule Next Inspection 22 Street Name Parcel Address Line Sizes 1 Print Maps & Give to Crew 2 Conduct Inspections 4 Create Base Report 3 Download SL-RAT 5 Map Out in GIS 6 Generate Cleaning Crew Work Orders 7 Close Out Re-Charge SL-RAT WWETT 2015

23.  >17,000 segments inspected in ~15 months of work  >20,000 manholes located and inspected  >3.6 MILLION Feet (682 miles) 23 17.3% Poor20.4% Fair 62.3% Good WWETT 2015

24. Trailing 12 Month SSO’s/Month SSO TREND WWETT 2015 24

25. WWETT 2015 25

26.  What is the Problem?  Sewer Line Inspection Methods  Acoustic Inspection Technology  Case Study  Summary 26 WWETT 2015

27. 1. The SL-RAT is simple, reliable, and easy to use 2. Keep up with the data - DAILY! Backlogs can get overwhelming 3. Forces discipline in visiting every manhole – identify issues, update GIS records, etc 4. Has focused efforts on the 38% of segments that are Poor or Fair 5. Requires teamwork to achieve full potential – cleaning crews, GIS, inspection crews – must all work together 6. Effective in economically reducing SSO rates 7. Future plans include historical trending with CityWorks 27 WWETT 2015

28. 28 Phone:877-PIPECHK (877-747-3245) Email: achurchill@infosenseinc.com Website: www.infosenseinc.com WWETT 2015