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Regulations
Basic Principles
Disinfection
Treatment Processes
Miscellaneous
100
The regulation which contains the Ontario Drinking Water Quality Standards.
What is O. Reg. 169?
100
The force water exerts as it changes direction.
What is thrust?
100
The liquid form of chlorine commercially known as bleach.
What is sodium hypochlorite?
100
The step in the treatment process where a chemical such as alum is typical added.
What is coagulation?
100
This acronym refers to groundwater influenced by surface water.
What is GUDI?
200
The regulation which specifies minimum levels of treatment for surface and groundwater.
What is O. Reg. 170?
200
The development or formation of small mounds of corrosion products on the inside of iron pipe.
What is tuberculation?
200
Two common and potentially harmful DBPs produced when using chlorine.
What are THMs and HAAs?
200
Devices used to remove large debris from raw water, such as logs, fish, or other unwanted material.
What are intake screens?
200
The minimum pressure under fire/emergency conditions in the distribution system.
What is 20 psi or 138 kPa?
300
The regulation which outlines the technical requirements for well construction, maintenance and abandonment.
What is O. Reg. 903?
300
The drop in psi or kPa between fluid at rest and fluid in motion.
What is friction loss?
300
The sum of free chlorine residual and combined chlorine residual.
What is total chlorine residual?
300
Two metals found in source water that are known to cause staining and promote bacterial growth and biofouling.
What are iron and manganese?
300
A service shutoff valve located in the service line near the curb, but between the water main and the building.
What is a curb stop?
400
The regulation which establishes the training and certification requirements for certified operators and water quality analysts.
What is O. Reg. 128?
400
Three ways to control or prevent water hammer.
What are opening and closing valves slowly, starting and stopping pumps gradually, and use of surge tanks?
400
The difference between the chlorine dose and the chlorine residual.
What is the chlorine demand?
400
Two parameters that are continously monitored during the treatment process as required by regulations.
What are turbidity and free chlorine residual?
400
Two types of mechanical cleaning devices used to clean the inside of pipes.
What are foam swabs and pigs?
500
This regulation requires water takers withdrawing greater than 50,000 L/d to obtain a Permit To Take Water.
What is O. Reg. 387?
500
Five factors that affect the degradation of NaOCl solution.
What are concentration, light, heat, pH, and metals?
500
The six critical factors affecting the effectiveness of disinfection.
What are type and dosage of disinfectant, contact time, pH, temperature, turbidity, and microorganisms?
500
The two steps in conventional treatment used to remove solids.
What are sedimentation/clarification and filtration?
500
The four pump characteristics shown on a pump curve.
What is Capacity, Total Head, Power and Efficiency?