A Prep tceq with Questions & Answers
New Surface water reservoirs in Texas? - (correct answer) -declines in certain areas.
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Sequestering manganese question? - (correct answer) -Does not allow manganese to combine with
yi yi yi yi yi yi yi yi yi yi yi yi
oxygen.
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Lead % in pipe and solder and flux? - (correct answer) -Max lead is 0.25%, lead and solder flux 0.2%
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Action level for Lead? - (correct answer) -Lead action level is .015%
yi yi yi yi yi yi yi yi yi yi yi
How do you know you have a TTHM MCL violation? - (correct answer) -Locational running average of all
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
samples exceeds TTHM maximum contaminant level is .080.
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NOTE: Pick the one that says LOCATIONAL and 0.080
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TTHM averages 0.060, 0.080, 0.080 and 0.090. Add together and multiply time x4. What has occurred?
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
- (correct answer) -The avg. does not exceed 0.080 so this is not a MCL violation. This is an operational
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
level violation and an operational assessment will need to be performed.
yi yi yi yi yi yi yi yi yi yi yi
Groundwater system has 2 pressure planes with 100 connections each. How many pumps, and the GPM
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
is required? - (correct answer) -Must have 2 or more pumps per pressure plane or pump station @
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
0.2gpm total capacity.
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4 pumps, 200gpm
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What is a bolson aquifer? - (correct answer) -Deep filled valley deposits
yi yi yi yi yi yi yi yi yi yi yi
A Chloraminated system is purchased with 1mg/l total chlorine and 0.1mg/l free ammonia. What
yi yi yi yi yi yi yi yi yi yi yi yi yi
booster dosage do you have to apply to reach a 2.5mg/l total residual? - (correct answer) -The ratio is
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
5 parts chlorine to 1 part ammonia. My math came out to answer A but you may double check.
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
A. 0.2mg/L ammonia first, then 1.5mg/l chlorine
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What happens when excess chlorine is added? - (correct answer) -The total residual becomes unstable
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
If groundwater with 1mg/L of free chlorine is blended with surface water with 1mg/L monochloramine
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
and 05mg/L free ammonia, what happens? - (correct answer) -Free ammonia will mix with free chlorine
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
and create dicholramine that can cause taste and odor issues.
yi yi yi yi yi yi yi yi yi yi
When to backwash a pressure filter? - (correct answer) -When it reaches 10psi of head loss
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Who controls groundwater in the state of Texas? - (correct answer) -Groundwater is private property
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Hypoliminion aeration does what? - (correct answer) -Adds oxygen to the bottom layer
yi yi yi yi yi yi yi yi yi yi yi yi
When total hardness equals total alkalinity? - (correct answer) -The hardness is all carbonate
yi yi yi yi yi yi yi yi yi yi yi yi yi
Permanent hardness question? - (correct answer) -Permanent hardness cannot be removed with the
yi yi yi yi yi yi yi yi yi yi yi yi
use of chemicals
yi yi yi
, A 20' diameter tank, 19ft deep. Flow is .013MGD. How many hours will it take to fill the tank 2 times? -
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
(correct answer) -3.14x10x10x19 =5966
yi yi yi yi
5966x7.48(1 cubic foot of water)= 44,625.68 gallons yi yi yi yi yi yi
.013x1440 to get gallons per min =18.72 gallons per min yi yi yi yi yi yi yi yi yi
44,625.68/18.72=2383.8 min=39.7 hours yi yi
What do you need to determine a chlorine dosage? - (correct answer) -Amount of chemical and volume
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
of water to be treated
yi yi yi yi yi
65' x 20' x 12' sedimentation basin. Flow is 1,600,000 gallons per day. What is detention time? -
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
(correct answer) -1.8 hours
yi yi yi yi
convert 1,600,000 gpd to gph 1,600, = 66,667 gph yi yi yi yi yi yi yi yi yi yi
dention time = voulme of tank in gallons / flow rate yi yi yi yi yi yi yi yi yi yi yi
65x20x12x7.,667= 1.8 hours yi yi yi yi
Mud ball percent volume math. 695 ml total sample. Water begins at 500ml and rises to 545ml. What is
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
the percent volume? - (correct answer) -542ml-500ml = 42ml difference; 42ml/695ml x 100 = 6%
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Maximum gpm for granular filter media? - (correct answer) -2gpm/ft yi yi yi yi yi yi yi yi yi
Well has 150' airline. Pressure gauge reads 43psi when off and 30psi when pumping. What is the
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
drawdown? - (correct answer) -Drawdown = static level - pumping level; 43psi x 2.31 = 99, 30 x 2.31
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
= 69. 99-69 = 30' of drawdown
yi yi yi yi yi yi yi
Well pumps 250 gpm for 24 hours. The question gives a static psi reading and a pumping psi reading.
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Find the specific capacity of the well? - (correct answer) -Do the math to find the drawdown first (psi x
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
2.31) then (static level - pumping level). Then, pumping rate (gpm)/drawdown = Specific Capacity.
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Hydrostatic leakage question? - (correct answer) -The answer is 1.5 times the working pressure for 2
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
hours
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These are all acute violations EXCEPT? - (correct answer) -A positive total coliform sample is the answer
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
as it is not a MCL violation.
yi yi yi yi yi yi yi
What is a membrane filter used for in a water lab? - (correct answer) -Coliform organisms
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
What is true color? - (correct answer) -Dissolved organic substances that cannot be removed with
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
filtration
yi
Disinfection by product of chlorine dioxide? - (correct answer) -Chlorite yi yi yi yi yi yi yi yi yi
Can you divert surface water from one drainage basin to another? - (correct answer) -Not without a
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
TCEQ permit as all surface water is owned by the state.
yi yi yi yi yi yi yi yi yi yi yi
Representative sampling sites for disinfection residuals include? - (correct answer) -Compliance sites, yi yi yi yi yi yi yi yi yi yi yi
high age water areas, all pressure planes, tanks and booster pumps.
yi yi yi yi yi yi yi yi yi yi yi
NOTE: The key is find the one that list high age water areas
yi yi yi yi yi yi yi yi yi yi yi yi
Lakes/reservoirs with high biological growth? - (correct answer) -Eutrophic yi yi yi yi yi yi yi yi
When can public notification be rescinded for filter turbidity MCL violation? - (correct answer) -Filter
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
turbidity consistently below 1.0 NTU,
yi yi yi yi yi yi
distribution system flushed, yi yi
disinfectant residual above minimum,
yi yi yi yi
coliform samples negative
yi yi yi
New Surface water reservoirs in Texas? - (correct answer) -declines in certain areas.
yi yi yi yi yi yi yi yi yi yi yi yi
Sequestering manganese question? - (correct answer) -Does not allow manganese to combine with
yi yi yi yi yi yi yi yi yi yi yi yi
oxygen.
yi
Lead % in pipe and solder and flux? - (correct answer) -Max lead is 0.25%, lead and solder flux 0.2%
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Action level for Lead? - (correct answer) -Lead action level is .015%
yi yi yi yi yi yi yi yi yi yi yi
How do you know you have a TTHM MCL violation? - (correct answer) -Locational running average of all
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
samples exceeds TTHM maximum contaminant level is .080.
yi yi yi yi yi yi yi yi
NOTE: Pick the one that says LOCATIONAL and 0.080
yi yi yi yi yi yi yi yi
TTHM averages 0.060, 0.080, 0.080 and 0.090. Add together and multiply time x4. What has occurred?
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
- (correct answer) -The avg. does not exceed 0.080 so this is not a MCL violation. This is an operational
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
level violation and an operational assessment will need to be performed.
yi yi yi yi yi yi yi yi yi yi yi
Groundwater system has 2 pressure planes with 100 connections each. How many pumps, and the GPM
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
is required? - (correct answer) -Must have 2 or more pumps per pressure plane or pump station @
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
0.2gpm total capacity.
yi yi yi
4 pumps, 200gpm
yi yi
What is a bolson aquifer? - (correct answer) -Deep filled valley deposits
yi yi yi yi yi yi yi yi yi yi yi
A Chloraminated system is purchased with 1mg/l total chlorine and 0.1mg/l free ammonia. What
yi yi yi yi yi yi yi yi yi yi yi yi yi
booster dosage do you have to apply to reach a 2.5mg/l total residual? - (correct answer) -The ratio is
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
5 parts chlorine to 1 part ammonia. My math came out to answer A but you may double check.
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
A. 0.2mg/L ammonia first, then 1.5mg/l chlorine
yi yi yi yi yi yi
What happens when excess chlorine is added? - (correct answer) -The total residual becomes unstable
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
If groundwater with 1mg/L of free chlorine is blended with surface water with 1mg/L monochloramine
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
and 05mg/L free ammonia, what happens? - (correct answer) -Free ammonia will mix with free chlorine
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
and create dicholramine that can cause taste and odor issues.
yi yi yi yi yi yi yi yi yi yi
When to backwash a pressure filter? - (correct answer) -When it reaches 10psi of head loss
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Who controls groundwater in the state of Texas? - (correct answer) -Groundwater is private property
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Hypoliminion aeration does what? - (correct answer) -Adds oxygen to the bottom layer
yi yi yi yi yi yi yi yi yi yi yi yi
When total hardness equals total alkalinity? - (correct answer) -The hardness is all carbonate
yi yi yi yi yi yi yi yi yi yi yi yi yi
Permanent hardness question? - (correct answer) -Permanent hardness cannot be removed with the
yi yi yi yi yi yi yi yi yi yi yi yi
use of chemicals
yi yi yi
, A 20' diameter tank, 19ft deep. Flow is .013MGD. How many hours will it take to fill the tank 2 times? -
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
(correct answer) -3.14x10x10x19 =5966
yi yi yi yi
5966x7.48(1 cubic foot of water)= 44,625.68 gallons yi yi yi yi yi yi
.013x1440 to get gallons per min =18.72 gallons per min yi yi yi yi yi yi yi yi yi
44,625.68/18.72=2383.8 min=39.7 hours yi yi
What do you need to determine a chlorine dosage? - (correct answer) -Amount of chemical and volume
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
of water to be treated
yi yi yi yi yi
65' x 20' x 12' sedimentation basin. Flow is 1,600,000 gallons per day. What is detention time? -
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
(correct answer) -1.8 hours
yi yi yi yi
convert 1,600,000 gpd to gph 1,600, = 66,667 gph yi yi yi yi yi yi yi yi yi yi
dention time = voulme of tank in gallons / flow rate yi yi yi yi yi yi yi yi yi yi yi
65x20x12x7.,667= 1.8 hours yi yi yi yi
Mud ball percent volume math. 695 ml total sample. Water begins at 500ml and rises to 545ml. What is
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
the percent volume? - (correct answer) -542ml-500ml = 42ml difference; 42ml/695ml x 100 = 6%
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Maximum gpm for granular filter media? - (correct answer) -2gpm/ft yi yi yi yi yi yi yi yi yi
Well has 150' airline. Pressure gauge reads 43psi when off and 30psi when pumping. What is the
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
drawdown? - (correct answer) -Drawdown = static level - pumping level; 43psi x 2.31 = 99, 30 x 2.31
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
= 69. 99-69 = 30' of drawdown
yi yi yi yi yi yi yi
Well pumps 250 gpm for 24 hours. The question gives a static psi reading and a pumping psi reading.
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Find the specific capacity of the well? - (correct answer) -Do the math to find the drawdown first (psi x
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
2.31) then (static level - pumping level). Then, pumping rate (gpm)/drawdown = Specific Capacity.
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
Hydrostatic leakage question? - (correct answer) -The answer is 1.5 times the working pressure for 2
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
hours
yi
These are all acute violations EXCEPT? - (correct answer) -A positive total coliform sample is the answer
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
as it is not a MCL violation.
yi yi yi yi yi yi yi
What is a membrane filter used for in a water lab? - (correct answer) -Coliform organisms
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
What is true color? - (correct answer) -Dissolved organic substances that cannot be removed with
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
filtration
yi
Disinfection by product of chlorine dioxide? - (correct answer) -Chlorite yi yi yi yi yi yi yi yi yi
Can you divert surface water from one drainage basin to another? - (correct answer) -Not without a
yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi yi
TCEQ permit as all surface water is owned by the state.
yi yi yi yi yi yi yi yi yi yi yi
Representative sampling sites for disinfection residuals include? - (correct answer) -Compliance sites, yi yi yi yi yi yi yi yi yi yi yi
high age water areas, all pressure planes, tanks and booster pumps.
yi yi yi yi yi yi yi yi yi yi yi
NOTE: The key is find the one that list high age water areas
yi yi yi yi yi yi yi yi yi yi yi yi
Lakes/reservoirs with high biological growth? - (correct answer) -Eutrophic yi yi yi yi yi yi yi yi
When can public notification be rescinded for filter turbidity MCL violation? - (correct answer) -Filter
yi yi yi yi yi yi yi yi yi yi yi yi yi yi
turbidity consistently below 1.0 NTU,
yi yi yi yi yi yi
distribution system flushed, yi yi
disinfectant residual above minimum,
yi yi yi yi
coliform samples negative
yi yi yi
