PDF WSO Basic Science Concepts and Application: Principles and Practices of Water Supply Operations

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Using the utilitys repair manuals or manufacturers literature, investigate the internal construction of each component and identify the function of each of the parts. If a radio or microwave system is used, what repairs can be performed by a technician who does not hold Federal Communications Commission FCC certification as a radio repair person? At the central control point for the distribution system, identify which systems are automatic, manual, and semiautomatic.

List four reasons a manifold or battery meter installation is used in place of a single large meter.

by Pizzi, Nicholas G

Determine if your state has adopted requirements for the frequency of testing meters, and if so, what those requirements are. At the same time, determine the water source and treatment provided by each system. Summarize the information, highlighting any apparent relationship between the frequency of testing and other factors such as water quality, size of the system, and the cost of treated water used by the system. State drinking water regulations: Review requirements for public water systems to have a cross-connection control program.

Basic Science Concepts and Applications Principles and Practices of Water Supply Operations

In what position should an atmospheric vacuum breaker be installed relative to a shutoff valve? List seven elements that are essential to implement and operate a cross-connection control program successfully. Your city has just annexed a subdivision where homes will be provided water by your water utility, but the homes originally had private wells and septic systems.

After the hookups are completed, the weather turns very dry and water demand increases. You notice that some water samples collected near the new subdivision are showing high coliform counts. The local health officer informs you that she is receiving numerous complaints of stomach disorders and illness.

Describe what you would do to investigate this situation, and include an explanation as to the most likely cause of the problem and how it can be remedied. A new hospital is being built in your city, and the director of public works has asked you to recommend the cross-connection control devices for both the water connection to the hospital and at locations within the building.

Prepare a report outlining your recommendations. Describe the cross-connection control program in your community. If your community does not have a program, describe features of a program you would propose. You have just been employed to supervise the installation of a mile of new 8-in. Outline the steps you would take from delivery of the pipe up to the time the trench is ready for backfilling to ensure proper and safe installation of the pipe.

Read sections applying to required leakage and bacteriological testing of water mains. Explain what steps should be followed after pipe is installed but before a new pipeline is placed in service. What is the usual procedure followed if a laboratory reports the results of the bacteriological test of a new main as positive? List four items of commonly used personal protective gear that should be worn during construction.

Name three safety precautions that should be taken when mains in traffic areas are being repaired. You are the supervisor of a crew of eight workers who are about to start a small construction project that will consist of installing one block of 6-in.

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You have a small backhoe, an end loader, a portable air compressor, and a dump truck available to do the work. The soil in the area is only nominally stable. A few days before the job is to begin, you must list all of the safety procedures that must be considered both before and during the construction. Compile the list into the following categories:. Read sections on requirements for collecting distribution system samples for analysis.

Read sections relating to maintaining a specified pressure in the distribution system. List some system design considerations for both pipelines and storage facilities that could affect water quality. What are three issues to consider when operating a distribution system to maintain water quality? How do you determine the flow required to perform water main flushing to remove sediment? List three precautions to take before beginning a flushing procedure.

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What are some of the consequences of corrosive water and list some ways to reduce internal pipeline corrosion. List at least two ways of detecting leaks. What are five main tasks in a distribution system water audit? Obtain a water plat portion of a water system pipeline map showing mains, valves, and hydrants for a small water system in your area. Develop a plan to perform directional flushing to effectively improve water quality in any areas of low water usage. Using the same map, organize a plan to conduct a leak detection survey using electronic equipment.

Obtain a water plat that contains at least one water storage facility. Develop an operational strategy to keep the water fresh within this facility. State drinking water regulations: Read sections relating to the Lead and Copper Rule requirements. What is the most common type of inlet thread on a corporation stop? What is the major advantage of this type of thread? What two precautions are recommended before a utility undertakes the thawing of customer water services?

List eight points of information that should be recorded after a tap is made, but before the excavation is backfilled. Part of your system has copper service lines attached to ductile-iron mains. The system has just expanded into a new service area that has PVC mains and high-molecular-weight polyethylene service lines. All mains are 6 in. Discuss the type of corporation stop and tapping procedures you would recommend for each situation.

Contact two or more water utilities in your area and determine what types of materials they are presently using for water services, how deep they require the pipe to be laid, and other details. From this information, draw a cross-sectional sketch of a typical service, showing details for each system. Comment on the possible reasons for differences in the practices of different systems.

State drinking water regulations: Review sections relating to 1 reports that must be submitted to the state on distribution system operations and 2 requirements for records that water systems must maintain on their equipment and facilities. What is the name of the mapped record that provides a detailed picture of a portion of the distribution system?

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What mapped record is often made up in reduced-scale reproductions for ease of handling in the field? Identify three types of distribution system card records that are typically maintained and the basic information each contains.


AWWA Textbook Series Principles and Practices of Water Supply Operations 5 VOL.

Name five items that would typically be included in distribution system statistical records. What information would each report contain? You have just been appointed chief operator for a water system with 4, service connections. You learn that there are no maps or records of the systems facilities. Describe the types of maps and records you would initiate and how you would obtain the necessary information on existing facilities to start compiling the maps and records. Examine the comprehensive map for a local water system to determine the systems largest and smallest mains.

What purpose do the largest mains serve? Do the smallest mains adversely affect customer service or fire protection to areas of the system? If so, what methods could be used to correct the situation? What type of assessment was required under the Bioterrorism Act of ? What is the purpose of this assessment? What actions can be taken by water utility personnel to improve the cyber security of their SCADA networks?

You have been asked to create an Emergency Response Plan for a small water system that uses a well for its water supply. Using the model Emergency Response Plan described in chapter 17 that was developed for Manitoba as a basis, describe the components that would be included in your plan for this small system. Identify four behaviors or practices of a meter reader that might help create a favorable public image. Describe how good safety practices can contribute to an overall public relations program for a water utility.

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How can water distribution personnel familiarize themselves with safe driving regulations if the utility does not offer a formal training program? What is the first and foremost rule that water distribution personnel should follow if approached by the media for an opinion or statement? What are three advantages of having procedural manuals or other written guidelines for personnel in a water utility?