- Study guides, Class notes & Summaries

What is the general definition of an ion? An _________ with a positive or negative charge - Answer Atom A continuous positive pressure in a distribution system is essential for preventing what event? - Answer Backflow Event _____________ water pressure must be maintained to ensure adequate customer service during peak flow periods. However, minimum positive pressure must be maintained in mains to protect against backflow or back siphonage from cross-connections. - Answer ...

-

10 pages

Written in 2025/2026

Grade A+

COCOSOLUTIONS

Who is the "Primary agency" in West Virginia for the SDWA? - Answer The WV Bureau for Public Health What is a public water supply? - Answer A system that serves an average of at least 25 individuals or 15 service connections for at least 60 days a year. When should you notify the WVDEP to terminate employment? What form is needed to be used. - Answer At least 30 days prior to terminating, use a EW-74 Form Where should tests and analysis be done? - Answer At...

-

4 pages

Written in 2025/2026

Grade A+

COCOSOLUTIONS

Safe Drinking Water Act (SDWA) - Answer Name of act that sets standards (a.k.a. MCL's) for drinking water quality. WI DNR - Answer State agency responsible for public drinking water regulations in WI. Non-Community Water System - Answer Serves the public but not the same people year round Community Water System - Answer A public water system which serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round r...

-

9 pages

Written in 2025/2026

Grade A+

COCOSOLUTIONS

Presedimentation - Answer Reduce silt in water Settling zone - Answer Calm area in settling basin where suspended materials settle Coagulation - Answer Occurs in Seconds Flocculation - Answer Occurs in Minutes (optimum velocity 0.5 fps) Floc should be popcorn sized Sedimentation - Answer Occurs in Hours (4 hour detention time) Typical Coagulants - Answer Aluminum Sulfate Al2(SO4)3 Ferrix Fe2(SO4)3 pH Increasing Chemicals - Answer Lime...

-

14 pages

Written in 2025/2026

Grade A+

COCOSOLUTIONS

Is chlorine gas lighter or denser than air? - Answer Denser. public water supply (PWS) - Answer Serves at least 25 people or has 15 service connections. Must be in use over 60 days per year. Types of public water supplies (3) - Answer Community, non-transient, and transient. Community public water supply - Answer Cities, homeowner associations, mobile parks (most public water supplies are community). Non-transient public water supply - Answer Schools, bu...

-

21 pages

Written in 2025/2026

Grade A+

COCOSOLUTIONS

The minimum and maximum chloride residual in a water distribution system is ? - Answer 0.2 mg/l and 4mg/L of free chlorine Nitrate may not exceed what concentration when tested yearly for a groundwater treatment plant ? - Answer 10 mg/L The minimum number of total coliform samples that must be collected per month is based on Wich of the following? - Answer The population served by the system When a distribution bacteriological sample is positive for a total coliform th...

-

6 pages

Written in 2025/2026

Grade A+

COCOSOLUTIONS

If a customer complains about the drinking water characteristics, the operator should record the complaint and... - Answer Investigate immediately What term is used when a water utility divides its total operating expenses into a total revenue? - Answer Operating ratio How often should data, such as flow rate, amount of water treated, dosage of chemical, and reservoir levels be recorded? - Answer Daily Under the requirements of the Safe Water Drinking Act, it is the du...

-

7 pages

Written in 2025/2026

Grade A+

COCOSOLUTIONS