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Regulatory Compliance & Safety Standards Flashcards

7 cards from real WTO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Regulatory Compliance & Safety Standards flashcards as text

  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?

    Answer: 50

    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.

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

    Answer: 1.3 mg/L

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

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

    Answer: Stage 2 Disinfectants and Disinfection Byproducts Rule

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

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

    Answer: 1,500 pounds

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

  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:

    Answer: Reportable Quantity

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

  6. Which drinking water regulation specifically addresses microbial and disinfection byproduct risks in systems using surface water or groundwater under the influence of surface water?

    Answer: Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR)

    The LT2ESWTR requires additional Cryptosporidium treatment for surface water systems with higher source water contamination levels.

  7. When a water system exceeds an MCL, which type of public notice is required for a non-acute violation?

    Answer: Tier 2 — within 30 days

    Non-acute MCL violations require a Tier 2 notice, which must be issued within 30 days of the system learning of the violation.