WTO Regulatory Compliance & Safety Standards 3

Question 1

A community water system serving 10,000 people must monitor for lead and copper at customer taps. During a monitoring period, how many samples are required under the Lead and Copper Rule?

Accepted Answer

50

Answer

Under the Lead and Copper Rule, a community water system serving 3,301–10,000 people must collect 30 samples, but systems serving more than 10,000 must collect 50 first-draw samples.

Question 2

What is the Action Level (AL) for copper under the Lead and Copper Rule?

Accepted Answer

1.3 mg/L

Answer

The Action Level for copper is 1.3 mg/L; if exceeded at the 90th percentile of samples, the system must take corrective action.

Question 3

Which disinfection byproduct rule requires monitoring for haloacetic acids (HAA5) and total trihalomethanes (TTHM)?

Accepted Answer

Stage 2 Disinfectants and Disinfection Byproducts Rule

Answer

The Stage 2 D/DBP Rule requires monitoring and compliance with TTHM and HAA5 MCLs based on locational running annual averages (LRAA).

Question 4

Process Safety Management (PSM) regulations under OSHA apply to water treatment facilities that store chlorine gas above what threshold quantity?

Accepted Answer

1,500 pounds

Answer

OSHA PSM regulations are triggered for chlorine gas when the quantity on-site meets or exceeds the threshold quantity of 1,500 pounds.

Question 5

Under the Emergency Planning and Community Right-to-Know Act (EPCRA), a water utility must report an extremely hazardous substance spill to the LEPC if it exceeds the:

Accepted Answer

Reportable Quantity

Answer

EPCRA Section 304 requires immediate notification to the Local Emergency Planning Committee (LEPC) if an accidental release exceeds the Reportable Quantity (RQ).

(WTO) Water Treatment Operator Certification Practice Test

(WTO) Water Treatment Operator Certification Practice Test

WTO Regulatory Compliance & Safety Standards 3