GWWI WW Laboratory Analyst Chapters 1-3 | Georgia Water Laboratory Analyst | Complete Questions & Answers
What event was famous in connecting illness with The Broad-Street Pump Incident (Cholera) proposed by John Snow.
contaminated water? Who discovered this?
What practices (proposed by Bazalgette, Snow, and - sewage is sent out of cities for treatment
others) are now used to combat cities being infested - drinking water is filtered (since 1800's)
with waste?
What was passed in the late 1800's (USA) to make Rivers and Harbors Act of 1899
waterways unobstructed (for navigation) by waste?
What was first used in England/USA to disinfect water? Chlorine (England 1890's, USA in 1908)
When?
In 1948, Congress passed the... Federal Water Pollution Control Act (FWPCA), which attempted to stop
pollution from worsening.
Untreated levels of what cause algal blooms? Phosphorous
Environmental concern grew in the US during what 1960's
decade?
President Nixon consolidated 44 federal agencies in Environmental Protection Agency (EPA)
1970 to form the...
When (2 dates) was the FWPCA amended? What was it 1972 and 1977, the Clean Water Act (CWA)
renamed to?
NPDES stands for: National Pollutant Discharge Elimination System
A DMR stands for: Discharge Monitoring Report
The Clean Water Act of 1972... (3 things) 1. Made in unlawful to discharge pollutants
2. Funded sewage treatment plants
3. Gave EPA authority to implement pollution control programs
CFR stands for: Code of Federal Regulations
The CWA is enforced by: (term, not agency) Primacy
The Georgia Water Quality Control Act was passed in: 1977
Who is responsible for administering the enforcing the The EPA
Clean Water Act:
,GWWI WW Laboratory Analyst Chapters 1-3 | Georgia Water Laboratory Analyst | Complete Questions & Answers
The velocity that water should enter a plant is: 2.0 feet per second (fps)
What velocity of flow is allowable for grit removal? 1.0 fps, but no lower than 0.7 fps
Preliminary treatment is designed to? How is it done? Remove large solid materials via bar screens, racks, screens, grit chambers,
tanks/ponds/EQ basins.
Primary treatment is designed to...? How and how Capture floating and settling solids, accomplished by clarifiers. As much as
much? 60% of solids and 30% BOD removed at this point.
Secondary treatment is designed to...? How and how Designed to cleanse the water by stabilizing organic waste, while
much? microorganisms are encouraged to feed on the organic matter via DO. 85%
minimum waste removal at this point.
Microorganisms involved in treatment include: Algae, Bacteria, Ciliates, Rotifers - though bacteria are the predominate
organism involved with secondary treatment.
Secondary clarification involves... Wasting (WAS) and Returning (RAS) occurs, RAS returns to secondary
treatment to remain "activated" sludge.
An example of tertiary treatment is: Disinfection
Disinfection is used to...? What are common methods Eliminate pathogenic bacteria, Examples include chlorination, UV, Ozone
used to do this?
How are solids handled? Processed in aerobic/anaerobic digesters, bacteria feed on waste to reduce
volume.
How are solids dewatered? They are dried (belt press, centrifuge, drying beds, vacuum filtration) and
disposed of (incinerated, landfill, compost, land application).
What is the primary purpose of a wastewater To provide all regulatory reporting and process control data to regulatory
laboratory? agencies and plant operators.
What is regulatory reporting? (or compliance/permit- Analysis performed as a municipality requirement (state/federal), outlined in
monitoring) NPDES permit.
What event was famous in connecting illness with The Broad-Street Pump Incident (Cholera) proposed by John Snow.
contaminated water? Who discovered this?
What practices (proposed by Bazalgette, Snow, and - sewage is sent out of cities for treatment
others) are now used to combat cities being infested - drinking water is filtered (since 1800's)
with waste?
What was passed in the late 1800's (USA) to make Rivers and Harbors Act of 1899
waterways unobstructed (for navigation) by waste?
What was first used in England/USA to disinfect water? Chlorine (England 1890's, USA in 1908)
When?
In 1948, Congress passed the... Federal Water Pollution Control Act (FWPCA), which attempted to stop
pollution from worsening.
Untreated levels of what cause algal blooms? Phosphorous
Environmental concern grew in the US during what 1960's
decade?
President Nixon consolidated 44 federal agencies in Environmental Protection Agency (EPA)
1970 to form the...
When (2 dates) was the FWPCA amended? What was it 1972 and 1977, the Clean Water Act (CWA)
renamed to?
NPDES stands for: National Pollutant Discharge Elimination System
A DMR stands for: Discharge Monitoring Report
The Clean Water Act of 1972... (3 things) 1. Made in unlawful to discharge pollutants
2. Funded sewage treatment plants
3. Gave EPA authority to implement pollution control programs
CFR stands for: Code of Federal Regulations
The CWA is enforced by: (term, not agency) Primacy
The Georgia Water Quality Control Act was passed in: 1977
Who is responsible for administering the enforcing the The EPA
Clean Water Act:
,GWWI WW Laboratory Analyst Chapters 1-3 | Georgia Water Laboratory Analyst | Complete Questions & Answers
The velocity that water should enter a plant is: 2.0 feet per second (fps)
What velocity of flow is allowable for grit removal? 1.0 fps, but no lower than 0.7 fps
Preliminary treatment is designed to? How is it done? Remove large solid materials via bar screens, racks, screens, grit chambers,
tanks/ponds/EQ basins.
Primary treatment is designed to...? How and how Capture floating and settling solids, accomplished by clarifiers. As much as
much? 60% of solids and 30% BOD removed at this point.
Secondary treatment is designed to...? How and how Designed to cleanse the water by stabilizing organic waste, while
much? microorganisms are encouraged to feed on the organic matter via DO. 85%
minimum waste removal at this point.
Microorganisms involved in treatment include: Algae, Bacteria, Ciliates, Rotifers - though bacteria are the predominate
organism involved with secondary treatment.
Secondary clarification involves... Wasting (WAS) and Returning (RAS) occurs, RAS returns to secondary
treatment to remain "activated" sludge.
An example of tertiary treatment is: Disinfection
Disinfection is used to...? What are common methods Eliminate pathogenic bacteria, Examples include chlorination, UV, Ozone
used to do this?
How are solids handled? Processed in aerobic/anaerobic digesters, bacteria feed on waste to reduce
volume.
How are solids dewatered? They are dried (belt press, centrifuge, drying beds, vacuum filtration) and
disposed of (incinerated, landfill, compost, land application).
What is the primary purpose of a wastewater To provide all regulatory reporting and process control data to regulatory
laboratory? agencies and plant operators.
What is regulatory reporting? (or compliance/permit- Analysis performed as a municipality requirement (state/federal), outlined in
monitoring) NPDES permit.
