TCEQ Water Treatment Class B Regulations |Exam-Questions with
Correct Answers|Verified
Water systems that collect less than _____ coliform samples each month can have 1 positive
sample and remain in compliance. - ✔✔40
the maximum contaminant level for bromate is _____ mg/L - ✔✔.010
_______ _________ is the best available technology for removing radium-226 and radium-
228 from a water supply - ✔✔Lime Softening
Water systems must provide at least ______ removal or inactivation of Giardia lamblia cysts
between a point where the raw water is not subject to recontamination e surface water
runoff and a point downstream before or at the first customer. - ✔✔3-log
Water systems must provide at least _____ removal or inactivation of viruses between a
point where the raw water is not subject to recontamination by surface water runoff and a
point downstream before or at the first customer. - ✔✔4-log
Color gives the water an unappealing appearance and indicates the ________ ________
may be present - ✔✔dissolved organics
For water systems using conventional treatment or direct filtration, the turbidity level of
representative samples of a system's filtered water must be less than or equal to _____NTU
in at least 95% of the samples collected each month. - ✔✔0.3
A public water system that does not provide filtration must have a disinfection
concentration in the distribution system, measured as total chlorine, combined chlorine, or
chlorine dioxide, which cannot be undetectable in more than ______% of the samples each.
- ✔✔5 %
Systems using diatomaceous earth filtration are required to have turbidity levels
_______NTU in ______% of the measurements collected each month. - ✔✔<1.0 NTU in 95%
, Lab analysis of pH, turbidity temperature, and residual disinfectant concentrations must be
performed by a person approved by the ________. - ✔✔State
Either the _______ or a ______ ______ certifies water treatment plant laboratories for the
measurement of total coliforms, fecal coliforms, and heterotrophic plate counts. -
✔✔USEPA or a State Agency
The time from sample collection to initiation of the fecal coliform analysis may not exceed
______hours - ✔✔8
Samples to be analyzed for total coliforms by the total coliform fermentation technique,
must be kept below _______degrees Celsius during transit. - ✔✔10 degrees Celsius
Utilities collecting samples more frequently than annually for inorganic contaminants
determine MCL compliance by calculating a _________ __________ _________ at each
compliance sample point. - ✔✔running annual average
A tier ______ violation poses immediate risk to public health and requires a clear
notification to the public within ___ _____ of learning of the violation. - ✔✔A tier 1
Violation, 24 hour notification
A tier ______ violation requires the water system to notify its customers as soon as possible,
but within 30 days of learning of the violation and continue _________notifications as long
as the violation persists - ✔✔A tier 2 violation
A tier ______ violation requires the water system to notify its customers as soon as possible,
but within 12 months of learning of the violation.
This may be accomplished by including the violation in the __________ ____________
report. - ✔✔A tier 3 violation, consumer confidence report
Water systems avoiding filtration of source water must show that the turbidity of the source
water immediately before initial point of disinfection has not exceeded _____NTU in
______% of the samples analyzed in the previous 6 months - ✔✔5.0 NTU in 90% of the
samples
Correct Answers|Verified
Water systems that collect less than _____ coliform samples each month can have 1 positive
sample and remain in compliance. - ✔✔40
the maximum contaminant level for bromate is _____ mg/L - ✔✔.010
_______ _________ is the best available technology for removing radium-226 and radium-
228 from a water supply - ✔✔Lime Softening
Water systems must provide at least ______ removal or inactivation of Giardia lamblia cysts
between a point where the raw water is not subject to recontamination e surface water
runoff and a point downstream before or at the first customer. - ✔✔3-log
Water systems must provide at least _____ removal or inactivation of viruses between a
point where the raw water is not subject to recontamination by surface water runoff and a
point downstream before or at the first customer. - ✔✔4-log
Color gives the water an unappealing appearance and indicates the ________ ________
may be present - ✔✔dissolved organics
For water systems using conventional treatment or direct filtration, the turbidity level of
representative samples of a system's filtered water must be less than or equal to _____NTU
in at least 95% of the samples collected each month. - ✔✔0.3
A public water system that does not provide filtration must have a disinfection
concentration in the distribution system, measured as total chlorine, combined chlorine, or
chlorine dioxide, which cannot be undetectable in more than ______% of the samples each.
- ✔✔5 %
Systems using diatomaceous earth filtration are required to have turbidity levels
_______NTU in ______% of the measurements collected each month. - ✔✔<1.0 NTU in 95%
, Lab analysis of pH, turbidity temperature, and residual disinfectant concentrations must be
performed by a person approved by the ________. - ✔✔State
Either the _______ or a ______ ______ certifies water treatment plant laboratories for the
measurement of total coliforms, fecal coliforms, and heterotrophic plate counts. -
✔✔USEPA or a State Agency
The time from sample collection to initiation of the fecal coliform analysis may not exceed
______hours - ✔✔8
Samples to be analyzed for total coliforms by the total coliform fermentation technique,
must be kept below _______degrees Celsius during transit. - ✔✔10 degrees Celsius
Utilities collecting samples more frequently than annually for inorganic contaminants
determine MCL compliance by calculating a _________ __________ _________ at each
compliance sample point. - ✔✔running annual average
A tier ______ violation poses immediate risk to public health and requires a clear
notification to the public within ___ _____ of learning of the violation. - ✔✔A tier 1
Violation, 24 hour notification
A tier ______ violation requires the water system to notify its customers as soon as possible,
but within 30 days of learning of the violation and continue _________notifications as long
as the violation persists - ✔✔A tier 2 violation
A tier ______ violation requires the water system to notify its customers as soon as possible,
but within 12 months of learning of the violation.
This may be accomplished by including the violation in the __________ ____________
report. - ✔✔A tier 3 violation, consumer confidence report
Water systems avoiding filtration of source water must show that the turbidity of the source
water immediately before initial point of disinfection has not exceeded _____NTU in
______% of the samples analyzed in the previous 6 months - ✔✔5.0 NTU in 90% of the
samples
