Surface Water Class D Ch. 15

Repeat samples for a positive coliform sample are required to be collected within

24 hours

Water systems avoiding filtration of source water must show that the turbidity has not exceeded ______ of the samples analyzed in the previous 6 months

5.0 NTU in 90%

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

8 hours

Tier II

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 quarterly notifications as long as the violation persists

Utilities collecting samples more frequently than annually for _______ at each compliance sample point

Running annual average

Lab analysis of pH, turbidity, temperature and residual disinfectant concentrations must be performed by a person approved by the

State

Either the ____ or ____ certifies water treatment plant laboratories for the measurement of total coliforms, fecal coliforms and heterotrophic plate counts

USEPA & State Agency

What is the maximum contaminant level for Bromate?

0.010 mg/L

Solder or flux is consider lead free if it does not contain more than

0.02% lead

A water system is considered public if it has at least ____ service connections or serves _____ or more person ____ or more days each year

15, 25, 60

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

10 degrees

Tier I

Any violation of the National Primary Drinking Water Regulations that pose an immediate risk to public health requires immediate notification of the water system's customers. The notification must be made within 24 hours of learning of the violation.

What may be present when color gives the water an unappealing appearance and indicates that this may be present?

Dissolved Organics

What can states do under the safe drinking water act?

Individual states can establish and enforce their own drinking water standards as long as standards are as stringent as the US EPA's national standards.

What elements in the 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 Manganese

Systems using diatomaceous earth filtration are required to have turbidity levels ______ of the measurements collected each month.

Less then or each too 1.0 ntu in 95%

How much NTU turbidity units in at least 95% of measurements taken each month?

Less then or equal to 0.3

What is the best available technology for removing radium-226 % radium-228 from a water supply?

Lime Softening

Tier III

Require 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 Customer Confidence Report.