AWWA Quality Control Procedures 3

Question 1

Which document defines the written procedures, personnel responsibilities, and QA objectives for a water laboratory's quality program?

Accepted Answer

Quality Assurance Project Plan (QAPP)

Answer

A QAPP documents all quality assurance and quality control objectives, procedures, and responsibilities for a specific project or ongoing program.

Question 2

What is the acceptable chlorine residual range at the entry point to a distribution system under the Surface Water Treatment Rule?

Accepted Answer

0.2 mg/L minimum

Answer

The Surface Water Treatment Rule requires a detectable disinfectant residual (minimum 0.2 mg/L) at the entry point to the distribution system.

Question 3

In a water quality report, a result reported as '<0.005 mg/L' indicates the concentration is:

Accepted Answer

Below the method detection limit

Answer

The less-than symbol indicates the analyte was not detected above the reporting limit, meaning the true value could be zero or any value below that threshold.

Question 4

Which AWWA standard provides guidance on the performance testing of water meters?

Accepted Answer

AWWA C700

Answer

AWWA C700 covers cold-water meters and includes accuracy and performance testing requirements for residential displacement meters.

Question 5

A turbidity spike in filtered water that exceeds 0.3 NTU most likely indicates:

Accepted Answer

A filter breakthrough or media problem

Answer

A turbidity spike in filtered effluent often signals filter breakthrough, media cracking, or inadequate ripening, compromising particle removal.

(AWWA) American Water Works Association Practice Test

(AWWA) American Water Works Association Practice Test

AWWA Quality Control Procedures 3