Water Treatment Exam Preparation Grade 2

The maximum residual disinfection level goal for chlorine is _ ____.

4 mg/L

The maximum contaminant level for bromate is _____ mg/L.

0.010 mg/L

The time from sample collection to initiation of the fecal coliform analysis may not exceed _____ hours.

8 hours

Turbidity must be monitored at all _____ _______ and at all _____ where water enters the distribution system in a community water system.

-filter effluents -points

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

Public water systems using groundwater must collect samples for sodium every ___ years at the entry point into the system.

3 years

Water systems that collect less than _____ coliform samples each month can have 1 positive sample and remain in compliance.

40

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"

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

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 action level for lead is _____ mg/L.

0.015 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

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

Systems that collect fewer than 40 total coliform samples each month are allowed _ positive sample without violating the total coliform rule.

1 positive

Samples to be analyzed for total coliforms by the total coliform Fermentation Technique, must be kept below _____ degrees Celsius during transit.

10 degrees Celsius

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

In order to apply for a monitoring waiver, a system must have ____ consecutive annual samples with non-detectable results for organic contaminants.

3

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

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

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

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

Color gives the water an unappealing appearance and indicates that _______ _______ may be present.

dissolved organics

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

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

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

Solder or flux is considered lead free if it does not contain more than ___% lead.

0.2%

A public water system serving more than ______ people must participate in the Unregulated Contaminated Monitoring program.

10,000 people

The MCL for Haloacetic acids is ______ mg/L.

0.060 mg/L

The action level for copper is __ mg/L.

1.3 mg/L

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%

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

____ 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

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

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

Utilities collecting samples more frequently than annually for inorganic contaminants determine MCL compliance by calculating a ______ ______ _______ at each compliance sample point.

running annual average

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