Module Review Flashcards
Describe sources of microbiological, chemical and radiological contaminants. What is the regulation that contains health-based standards for these contaminants?
Natural, organic, inorganic, in runoff, and industrial waste. 169-H-B standards.
Define pathogen and pathogenic organism
A disease causing agent such as bacteria, virus, and protozoa
What is the smallest category of pathogenic organisms in size? What implications would the size have for drinking water treatment?
Virus, they can pass through filters
What are indicator organisms and why are they used?
Cant test all organisms, choose few indicators that tell us there is likely presence of contaminants.
Determine whether an organism is a virus, bacteria or protozoa. E.coli, total coliforms, cyanobacteria, rotavirus, cryptosporidium, adenovirus, giardia
E.coli, B
Total Coliform, B
Cyanobacteria, B
Rotavirus, V
Cryptosporidium, P
Adenovirus, V
Giardia, P
The safe drinking water act describes roles and responsibilities that certified operators must meet. list five.
-Training
-Monitoring
-Respond to Hazards
-Public Trust
-Sample
-Post warning
What kind of information should be delivered to the public in case of emergency situations and why is it important that the public be notified?
-Cause of incident
-Alternate source of water
-Probable duration
Why? Health at risk, when informed people can adapt.
When should you seek assistance?
-In emergency conditions
-Treatment process failures
-Contamination of source
-Spills or leaks of chemicals
-Power failure, fires, floods, and other disasters
List factors that affect surface water quality
-Agricultural runoff
-Urban runoff
-Runoff from dump and hazardous waste sites
-Acid rain
-Pollutants
List the drawbacks of algae presence in surface water
-Filtration issues
-Possible pathogens
-Less runtime on filters (more backwashes)
Is turbidity more prevalent in ground water or surface water?
Surface water
Define “Aquifer”
Area of natural underground layer of porous water-bearing materials
Define “confined aquifer”
Aquifer covered by a layer of soil with low permeability such as clay
What is the most common type of well used by municipalities?
Drilled wells
Provide three sources of contamination of groundwater
-Industrial leachate
-Neighboring aquifer contamination
-Contaminated wells
What measures could be put into place to provide source water protection?
Stop allowing gas powered engines on lakes
what are the three groups of contaminants listed in O. Reg. 169/03 ?
-Microbiological
-Chemical
-Radiological
What is the difference between anaerobic and aerobic?
Aerobic refers to organisms which require oxygen to grow and anaerobic organisms can not survive in environments where oxygen is present
Define “solution”
A liquid containing dissolved substances
Define “Solvent”
A substance usually a liquid in which other substances are dissolved
Define “solute”
A substance that is dissolved into another substance
Define “Concentration”
The strength of the solution
Define “precipitate”
solid particles forced out of solution by chemical reaction
Define “precipitation”
The process of forming a chemical precipitate
