WASTEWATER GRADE 1 QUIZ SCRIPT
REVIEW SET VIEW AHEAD ASSESSMENT
2026 100% CORRECT.
⫸ population equivalents. Answer: 100 lbs wastewater per day, .2 lbs
TSS/day, .17 BOD/day
⫸ industrial wastewater. Answer: Comes from industries. Compatible
wastes can be processed by the plant. Incompatible wastes are toxic to
the plant.
⫸ sanitary wastewater. Answer: The combined domestic and
industrial waste waters from community.
⫸ storm water. Answer: Water that runs off roads, parking lots, and
other impervious surfaces during rain and snow storms
⫸ sanitary sewers. Answer: Convey domestic and industrial waste
waters, typically from where they are generated to the plant.
⫸ storm sewers. Answer: Convey storm water, typically from storm
drains directly to a point of discharge (stream, river, ocean).
, ⫸ combined sewers. Answer: Convey sanitary waste water combined
with storm water.
⫸ Reasons to collect samples. Answer: federal and state regulatory
compliance, process control, trouble shooting, special studies
including future designs.
⫸ grab sample. Answer: One time sample. Chlorine residual,
coliform tests, settable solids, dissolved oxygen, pH, grease and oil,
sulfide tests.
⫸ Time based composite sample. Answer: Fixed volume of sample is
collected after passage of a set amount of time over a certain time
period.
⫸ Flow based composite sample. Answer: Fixed volume of sample is
collected after a prescribed amount of flow has passed through the
sampling point, or a volume of sample proportional to the flow is
collected after passage of a prescribed amount of time over a certain
time period. This sample can also be called a flow proportional
composite sample.
⫸ diurnal flow. Answer: Low at night between 2 and 5 am, steady
steep increase in flow starting after 5 am, reaching first peak in the
late morning or early afternoon, slight decrease through the afternoon,
second peak between 6 and 9 pm, and a tapering off of to the low
flows of 2 am.
REVIEW SET VIEW AHEAD ASSESSMENT
2026 100% CORRECT.
⫸ population equivalents. Answer: 100 lbs wastewater per day, .2 lbs
TSS/day, .17 BOD/day
⫸ industrial wastewater. Answer: Comes from industries. Compatible
wastes can be processed by the plant. Incompatible wastes are toxic to
the plant.
⫸ sanitary wastewater. Answer: The combined domestic and
industrial waste waters from community.
⫸ storm water. Answer: Water that runs off roads, parking lots, and
other impervious surfaces during rain and snow storms
⫸ sanitary sewers. Answer: Convey domestic and industrial waste
waters, typically from where they are generated to the plant.
⫸ storm sewers. Answer: Convey storm water, typically from storm
drains directly to a point of discharge (stream, river, ocean).
, ⫸ combined sewers. Answer: Convey sanitary waste water combined
with storm water.
⫸ Reasons to collect samples. Answer: federal and state regulatory
compliance, process control, trouble shooting, special studies
including future designs.
⫸ grab sample. Answer: One time sample. Chlorine residual,
coliform tests, settable solids, dissolved oxygen, pH, grease and oil,
sulfide tests.
⫸ Time based composite sample. Answer: Fixed volume of sample is
collected after passage of a set amount of time over a certain time
period.
⫸ Flow based composite sample. Answer: Fixed volume of sample is
collected after a prescribed amount of flow has passed through the
sampling point, or a volume of sample proportional to the flow is
collected after passage of a prescribed amount of time over a certain
time period. This sample can also be called a flow proportional
composite sample.
⫸ diurnal flow. Answer: Low at night between 2 and 5 am, steady
steep increase in flow starting after 5 am, reaching first peak in the
late morning or early afternoon, slight decrease through the afternoon,
second peak between 6 and 9 pm, and a tapering off of to the low
flows of 2 am.
