HIC Water Quality & Sampling 3

Question 1

A drinking water sample tests positive for E. coli. What is the required public notification timeline for this acute MCL violation?

Accepted Answer

Within 24 hours

Answer

E. coli presence is an acute MCL violation requiring Tier 1 public notification within 24 hours using television, radio, or direct contact.

Question 2

Which parameter is used as the primary indicator of fecal contamination in a rapid water quality field test?

Accepted Answer

Fecal coliform or E. coli

Answer

Fecal coliform and E. coli are indicators of fecal contamination because they are consistently present in the intestinal tracts of warm-blooded animals.

Question 3

When collecting a water sample for nitrate analysis near agricultural land, which container and preservation method is correct?

Accepted Answer

Plastic bottle, no preservation needed, analyze within 48 hours or refrigerate at 4°C

Answer

Nitrate samples are collected in plastic bottles with no preservative and held at 4°C; they must be analyzed within 48 hours.

Question 4

Under the Safe Drinking Water Act, which federal agency sets and enforces drinking water standards for public water systems?

Accepted Answer

EPA

Answer

The EPA establishes National Primary and Secondary Drinking Water Regulations under the Safe Drinking Water Act.

Question 5

A health inspector evaluates a well serving a food establishment. Which setback distance from a septic system is generally required for a new well under typical state guidelines?

Accepted Answer

100 feet

Answer

Most state regulations require a minimum 100-foot setback between a private well and a septic tank or drain field to prevent contamination.

(HIC) Health Inspector Certification Practice Test

(HIC) Health Inspector Certification Practice Test

HIC Water Quality & Sampling 3