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CTC 450 Review

CTC 450 Review. Water Processes. Objectives. Understand the basics with respect to operation of waterworks. Operational Requirements. To maintain a system in working order (and avoid as much as possible any failures) you must know as much as possible about the overall system. Fire Hydrants.

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CTC 450 Review

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  1. CTC 450 Review • Water Processes

  2. Objectives • Understand the basics with respect to operation of waterworks

  3. Operational Requirements • To maintain a system in working order (and avoid as much as possible any failures) you must know as much as possible about the overall system

  4. Fire Hydrants • Restrict usage for street cleaning, construction work • After use, check operation • Periodic inspections • Maintain a stock of repair parts • Drainage essential in cold climates

  5. Valves • Installed to isolate sections of pipe • Provide periodic inspection and maintenance • Must know where they’re at to use them (good mapping; don’t pave over) • Repair or replace if needed

  6. Cross Connection, Backflow Preventers and Meters • Inspect areas of potential high hazard (hospitals, mortuaries, industries, irrigation systems, etc) • Meters must be repaired or replaced if not working correctly

  7. Leak Detection • Find small leaks before they become large • Can use sound wave detectors to detect leaks • Can fix small leaks by fitting a cover over the pipe • http://www.epwu.org/services/water_flow.html

  8. Tapping Mains • Wet tap—pipe is tapped while in use • See Figure 8-1, page 240

  9. Distribution Testing • Fire Flow Tests • Hydrant Tests (pressure and flow) • Minimum 20 psi @ designated fire flow • Dechlorinate water (vitamin C) if discharged to storm system • Flow and pressure testing to calibrate computer models

  10. Water Treatment Process Control • Highly automated with dial-in capabilities • SCADA systems (supervisory control and data acquisition)

  11. Water Quality Control • Some lab tests are on-line (turbidity) • Some tests are done on-site • Some tests are sent out

  12. Sanitary Survey • Review of system to identify all areas that represent a risk to water quality and delivery

  13. Recordkeeping • Efficient management depends on detailed recordkeeping • Water quality • Water quantity • Plant operation data • Chemicals added • Annual reports • Public notification

  14. Water Conservation • Public education • Installation of high-efficiency plumbing fixtures • Tampa-77.2 gpcd to 38.9 gpcd • Institute water rates/meters (discourage lawn watering) • Fix leaks

  15. Energy Conservation • Pumps major use of energy • Must understand rate schedule of utility • Can replace motors with high-efficiency motors

  16. Water Rates • Must charge enough to cover costs • Usually charged by class (residential, commercial, or industrial)

  17. Security • SCADA systems should be secure • Fire protection • Prevention from contamination and ability to determine contamination • Barriers around perimeter • Use of card keys, cameras, and strict protocols

  18. Homework Assignment Not graded but fair game for the final exam

  19. Mohawk Valley Water Authority(http://www.mvwa.us/) • Who is the Water Quality Laboratory Director?  • When do the Water Board meetings occur? • What population is served? • How many service connections are there? • What is the water source used? • How large is the watershed area? 

  20. Mohawk Valley Water Authority • What system improvements are being made and what are the associated costs? • What is the raw water and finished water values for pH, alkalinity, and color? • Is fluoride added to the water? • What is the size of the raw water pipelines? • What is the LT2 Rule? • What is the minimum cost to fill a swimming pool?

  21. Mohawk Valley Water Authority • What year did the current water treatment plant become operational?  • What is the cost of bottled water per gallon versus a gallon of water from the water treatment plan? • What is the lead and copper rule? • What are measured levels of THM’s and HAA’s? Discuss results.

  22. Mohawk Valley Water Authority • How many of 12 raw water samples tested positive for cryptosporidium in 2012? • How many of 12 raw water samples tested positive for giardia in 2012? • In 2012, did any filtered water samples test positive for crypto or giardia? • How many board members are on the Mohawk Valley Water Board Authority?

  23. Mohawk Valley Water Authority • What is a biofilm variance? • What is the ending date of the biofilm variance?

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