Exam Study Guide: Wastewater Sampling and the Revised Total Coliform Rule

Maintaining your education is important, especially in a career that demands licensing exams. Prove you’re an expert operator by answering these questions and others from our Exam Study Guide Series.

Exam Study Guide: Wastewater Sampling and the Revised Total Coliform Rule

Welcome back to TPO magazine's Exam Study Guide Series, which offers a pair of water/wastewater study questions with in-depth explanations of the answers. Last time, we covered a set of wastewater and drinking water treatment questions on the topics of Excessive Clarifier Ashing and Calculating MRDL for Chlorine. This time you can test your knowledge about wastewater sampling and the Revised Total Coliform Rule (RTCR).

Wastewater Treatment Sample Question

What type of sampling is used to gather samples at the same time and same place on a regular basis?

A. Aliquation sampling
B. Eight-hour composite sampling
C. 24-hour composite sampling
D. Grab sampling

Water Treatment Sample Question

What triggers a Level 1 Assessment under the RTCR?

A. An E. Coli MCL violation
B. A positive total coliform sample
C. Greater than 5% of the routine bacteriological samples collected are total coliform positive 
D. A routine and a repeat bacteriological sample tests positive for total coliform

To see the answers to both the above questions, click this link.

About the authors: Rick Lallish is the Water Pollution Control program director at the Environmental Resources Training Center (ERTC) of Southern Illinois University-Edwardsville. He provides training for entry-level operators in the wastewater field and operators throughout the state looking to further their education. Lallish was also named the 2017 Illinois Operator of the Year and 2018 president of the Illinois Association of Water Pollution Control Operators.

Drew Hoelscher is the program director of drinking water operations at the Environmental Resources Training Center in Edwardsville, Illinois.


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