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Water: Water Quality Standards Academy

Basic Course: Supplemental Topics (NPDES) Quiz

NPDES Permit Program

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Brief Topic Quiz

To complete your review of the topic in this module, please take the self-assesement quiz by reviewing each question and considering the possible responses.

A note about the quiz:

At the bottom of this page are the answers for this section.

Answer each of the questions below

1. For jurisdictions  where the NPDES program has not been authorized, the EPA Region serves as the  permitting authority and may carry out which of the following implementation  functions?
  1. Issuing permits.
  2. Conducting compliance and monitoring activities.
  3. Enforcing the requirements of the permit.
  4. None of the above.
  5. All of the above.
2. When a State/Tribe  includes a technology-based effluent limit in an NPDES permit, it is a performance standard only and the permitting  authority generally cannot require the use of a particular technology to achieve the  limit.
  1. True.
  2. False.
3. Which one of the  following is not necessarily involved in assessing the need for a WQBEL?
  1. Characterizing  the effluent.
  2. Establishing  a TMDL.
  3. Identifying  relevant water quality standards.
  4. Characterizing  the receiving water.
4. Statement:  Where a State/Tribe’s water quality standards do  not allow for consideration of dilution/mixing, water quality criteria must be  attained at the effluent’s discharge location in the receiving water.
  1. True.
  2. False.
5. Which is most correct about what POTWs can treat, according to the definition used for the NPDES program?
  1. Municipal  sewage.
  2. Industrial  wastes.
  3. Both.
  4. Neither.

Answers

  1. For jurisdictions  where the NPDES program has not been authorized, the EPA Region serves as the  permitting authority and may carry out which of the following implementation  functions?

    Answer:All of the above. Most  States, however, have been authorized by EPA under the NPDES program to issue  point source discharge permits, with the Agency functioning in an oversight role.

  2. True or False Statement: When a State/Tribe  includes a technology-based effluent limit in an NPDES permit, it is a performance standard only and the permitting  authority generally cannot require the use of a particular technology to achieve the  limit.

    Answer: True. It is generally left to the discharger  to decide what approach it will take to comply with the permit’s TBEL requirements.

  3. Which one of the  following is not necessarily involved in assessing the need for a WQBEL?

    Answer: Establishing a TMDL. A TMDL is  not a necessary prerequisite to developing a WQBEL, and in many permitting  situations the permit writer is not dealing with an impaired water. But if a relevant TMDL has been  established with a waste load allocation, then the pollutant is of concern and  needs to be addressed.

  4. True or False Statement: Where a State/Tribe’s  water quality standards do not allow for consideration of dilution/mixing,  water quality criteria must be attained at the effluent’s discharge location in the  receiving water.

    Answer:True.  However, under the CWA, States/Tribes have the  discretion to decide whether to include effluent dilution/mixing as part of  their water quality standards.       

  5. Which is most correct  about what POTWs can treat, according to the definition used for the NPDES  program?

    Answer: Both.  Publicly owned  treatment works can treat either municipal sewage or industrial wastes or a  combination of the two.


Disclaimer:
For informational purposes only–Not official statements of EPA policy.

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