MCLs, MRDLs, water sampling & testing

The FREE chlorine residual must be at least ___ mg/L at the entry point of the distribution system.

Water levels in wells must be tested...

The TOTAL chlorine residual must be at least ___ mg/L at the entry point of the distribution system.

At a minimum, the FREE or TOTAL chlorine residual must be _____________ throughout the distribution system.

A groundwater system that add chlorine must measure chlorine residual a least ___ times per week.

A surface system that add chorine must measure chorine residual _______.

MRDL stands for Maximum Residual __________ Level.

MRDL for chlorine and chloramine = ____ mg/L

mg/L is equal to Parts Per __________

MRDL for chlorine dioxide = ___ mg/L

MCL stands for Maximum __________ Level

MCL for fluoride = ___ mg/L

MCL for secondary fluoride = ____ mg/L

The DNR states the acceptable range for ____________ is 0.6 - 0.8 mg/L

The DNR states the optimum fluoride level is ____ mg/L

A system that adds fluoride must test it's fluoride concentration at least __________.

If a bacti sample is positive, three repeat samples must be taken at the following locations:
1. Original location (1 sample)
2. Within ____ services upstream and down stream of original location (2 samples)

A system that adds fluoride must submit a sample to a state lab for testing at least _________ and compare their own test results to the state results ("split sample").

MCL for TTHM (trihalomethanes) is ______ mg/L

MCL for HAA5 (haloacetic acids) is _____ mg/L

A bottle used to collect water for a bacteria ("bacti") test must ALWAYS contain powdered sodium thiosulfate ("THIO") to neutralize any __________ in the sample.

A bottle used to collect water for a fluoride (SPADNS) test must NEVER contain ______________.

Sodium thiosulfate is also called...

This test is used to measure the chlorine residual via spectrophotometry.

This test is used to measure fluoride via spectrophotometry.

How many buffers are needed at a MINIMUM to calibrate a pH meter?

The Langelier Index is a measure of the water's ________________.

The water is considered corrosive if the Langelier Index is...

The water is considered ________________ if the Langelier Index is -2 to 0.

The water is considered non-corrosive if the Langelier Index is _____ or greater.

The minimum number of monthly bacteria ("bacti") samples that must be taken is determined by the system's....

The total coliform MCL for systems that take less than 40 samples per month is _________ positive sample.

The total coliform MCL for systems that take 40 or more samples per month is _________ positive samples.

A bacti sample must be tested within ____ hours of collection.

Bacti samples not analyzed immediately must be kept at ___________ deg F (range).

Bacti samples not analyzed immediately must be kept at ___________ deg C (range).

Exceeding the total coliform MCL requires a ________ __________ within 24 hours, in addition to resampling.

Two bacti samples 24 hours apart are required UNLESS the chlorine residual is tested after passing the first sample and is greater than _____ mg/L.

_____________ bacteria are also called "indicator bacteria" because they indicate a POTENTIAL fecal contamination.

MCL for nitrate is ____ mg/L

Secondary standard for iron (Fe) is ______ mg/L

Secondary standard for manganese (Mn) is ______ mg/L

Secondary standard for hydrogen sulfide (H2S) is ______ mg/L

Secondary standard for bromate (BrO3) is ______ mg/L

How often are bacti tests required to be taken from raw water (ie. directly from the well before any treatment)?

A Langelier Index above zero is considered _________-forming.

A sampler should never set down the bottle cap while taking a ________ ___________ sample.

Swing/swivel faucets, plastic faucets, aerated faucets, and threaded faucets are examples of bad locations to take a _____ __________ sample.

"________ bore, _______ end" describes faucets that are ideal for sampling total coliform.

If a bacti sample for a groundwater system is positive, a "triggered source water" sample must be collected from all _______ that supply water to the sampling location.

Fluoride levels that exceed the MCL can result in ___________ (tooth staining) in children.

Accurate liquid measurement requires reading the bottom of the meniscus at _____ _________.

Nitrate monitoring requires one sample from each entry point every....

The frequency of lead & copper monitoring samples is determined by...

Synthetic organic chemicals must be sampled from each entry point _________ times a year.

For systems serving 10K+ people and chlorinated, total trihalomethanes must be sampled once every...

Volatile organic compounds must be sampled once every...

Radioactivity must be monitored once every....