Water Treatment Exam Preparation Grade 2
Public water systems using groundwater must collect samples for sodium every ___ years at the entry point into the system.
3 years
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 by surface water runoff and a point downstream before or at the first customer.
3-log
The maximum residual disinfection level goal for chlorine is _ ____.
4 mg/L
Water systems must provide at least 4-log 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
Water systems that collect less than _____ coliform samples each month can have 1 positive sample and remain in compliance.
40
A water supplier must report the failure to comply with any national primary drinking water regulation, including monitoring requirements, to the state primacy agency within __ hours of occurrence.
48 hours
_ _______ of total coliform samples can be positive, for systems that collect 40 or more samples each month, and the system will remain in compliance.
5 percent
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%
Water systems avoiding filtration of source water must show that the turbidity of the source water immediately before the initial point of disinfection has not exceeded __ NTU in __% of the samples analyzed in the previous 6 months.
5.0 NTU in 90%
If a water system does not collect a sample for unregulated contaminant monitoring according to federal instructions for a listed contaminant, the failure must be reported to the UCMR sampling coordinator or state within _____ days.
7 days
The time from sample collection to initiation of the fecal coliform analysis may not exceed _____ hours.
8 hours
A Tier _ violation requires the public water system to notify its customers within 12 months of learning of the violation. This may be accomplished by including the violation in the ________ _________ Report
Consumer Confidence
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
Color gives the water an unappealing appearance and indicates that _______ _______ may be present.
dissolved organics
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.
quarterly
Utilities collecting samples more frequently than annually for inorganic contaminants determine MCL compliance by calculating a ______ ______ _______ at each compliance sample point.
running annual average
Lead and copper analysis requires a 1,000 mL (1 liter) "_____ ____" sample be collected from the customer's cold water tap after the water has sat idle for at least _ hours.
"first draw"
Systems that collect fewer than 40 total coliform samples each month are allowed _ positive sample without violating the total coliform rule.
1 positive
The action level for copper is __ mg/L.
1.3 mg/L
When a public water system must notify its customers under the public notification rule, it has __ days to notify the state primacy agency of full compliance with the public notification requirements.
10 days
Samples to be analyzed for total coliforms by the total coliform Fermentation Technique, must be kept below _____ degrees Celsius during transit.
10 degrees Celsius
A public water system serving more than ______ people must participate in the Unregulated Contaminated Monitoring program.
10,000 people
The UCMR requires water systems to monitor unregulated contaminants by collecting the required samples in one continuous ________ period.
12-month
A nitrate sample can be held for ___ days before analysis if the sample is chlorinated and not acidified.
14 days
A Tier _ violation poses immediate risk to public health and requires a clear notification to the public within __ ______ of learning of the violation.
24 hours
Repeat samples for a positive coliform sample are required to be collected within ____ hours.
24 hours
In order to apply for a monitoring waiver, a system must have ____ consecutive annual samples with non-detectable results for organic contaminants.
3
____ and/or _________ in a water supply can discolor laundry, cause a bad taste in the water, and cause taste problems in beverages such as coffee and tea.
Iron and/or Manganese
A water system is considered public if it has at least ____ service connections or serves ____ or more persons ____ or more days each year.
-15 service connections -25 or more persons -60 or more days each year
The prohibition on the use of lead for any plumbing in a residential or nonresidential facility connected to a public water system that monitors water for human consumption does not apply to repair of ____ ____ pipes using _____ joints.
-Cast Iron pipes -leaded joints
Total _______ samples must be collected at sites which are representative of water quality throughout the distribution system according to a written ______ _____ _____ subject to state review and revision.
-Coliform, -sample siting plan
Turbidity must be monitored at all _____ _______ and at all _____ where water enters the distribution system in a community water system.
-filter effluents -points
A follow-up sample is required if the concentration in the composite sample is greater than or equal to _______ mg/L for any contaminant listed in the National Primary Drinking Water Regulations, §141.61 (a)- Organic Chemicals.
0.0005 mg/L
The maximum contaminant level for bromate is _____ mg/L.
0.010 mg/L
The action level for lead is _____ mg/L.
0.015 mg/L
The MCL for Haloacetic acids is ______ mg/L.
0.060 mg/L
The MCL for Total Trihalomethanes is _____ mg/L.
0.080 mg/L
A public water system serving a population greater than 3,300 must not have a disinfectant residual entering the distribution system below __ mg/L for more than 4 hours.
0.2 mg/L
Solder or flux is considered lead free if it does not contain more than ___% lead.
0.2%
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
Composite samples for organic compounds must be composited by the _________ within __ days of sample collection.
Laboratory within 14 days
____ _______ is the best available technology for removing radium-226 and radium-228 from a water supply.
Lime softening
If a groundwater system detects any organic compound in the chloroethylene family [e.g., trichloroethylene, tetrachloroethylene and trans-1,2- dichloroethylene], it will be required to monitor for ____ _______ on a quarterly basis
Vinyl Chloride
Public water systems using surface water must sample for sodium ______.
annually
Samples collected for Nitrite-Nitrate analysis should be preserved by reducing the pH to less than __ with ______ ___ and refrigerating.
less than 2 with sulfuric acid
Certain tests can be performed by ______ _____ _______ _________ ("person acceptable to the state") without laboratory certification. These tests include: pH, Alkalinity, Turbidity, Calcium, Conductivity, Disinfectant Residual, Orthophosphate, Silica,
licensed water treatment operators
The only time it is acceptable for a water supplier to not report analytical results to the state is when the _____ ___ performs the analyses.
state lab
Asbestos samples are preserved by lowering the temperature to ____ degrees Celsius.
≤ 4 degrees Celsius
The turbidity leaving a slow sand filter must be ____ ntu in 95% of the measurements collected each month.
≤1.0 ntu
Systems using diatomaceous earth filtration are required to have turbidity levels _____ ntu in ____% of the measurements collected each month.
≤1.0 ntu in 95%
