Volume 3: Unit 2 Flashcards
Developing your flight’s environmental sampling, analysis, and monitoring plan is based on the _____
Regulatory requirements for your drinking water system
Include field blanks along with the liquid samples you send to the laboratory because they ____
Check for cross-contamination while handling samples
If you need to determine the residual chlorine content in a drinking water sampling, which piece of equipment would you use?
Color comparator
Your bioenvironmental engineering (BE) has informed you that you need to collect a water sample that characterizes the water quality at the dining hall at 0900. Which type of sample do you need to collect?
Grab
What type of sampler is best suited to collecting a water sample at various levels from tanks, tank cars and drums?
Bacon bomb
Fluid transfer is best accomplished using a ______
Plastic, polyethylene pasteur pipet
You have just received a new water test kit that you have never used before. What should you do before using the kit the first time?
Read manufacturer’s operating instructions
Which statement best describes how the calibration process works?
a) Compares equipment response against instruction manual guidelines.
b) Compares equipment response against an accurate reference source.
c) Compares readings against accurate reference readings.
d) Compares unknown values against know values
b) Compares equipment response against an accurate reference source
When collecting drinking water samples, in what order should you collect them?
Metals, chemicals, microbiological
When sterilizing a water tap, what is the percentage of chlorine solution you should use and how long should the tap be immersed in the solution?
1 percent chlorine solution; 0.5 minutes
When collecting potable water samples for bacteriological analysis, you should adhere to all of the following guidelines except which one?
Always flush out the bottle before taking the sample
If you ship your bacteriological water samples to an approved laboratory, what is the maximum time between collection and examination?
24 hours
What is the first step you perform when taking a water sample for chlorine analysis?
Remove the faucet aerator
How is total combined chlorine (TCC) determined?
Subtracting the FAC results from the TRC results
What type of water/liquid do you use to calibrate the pH pen?
Buffer solution
Drinking water with a high pH level (above 8.5) indicates to you the water ______
can cause aesthetic problems
When should you take pH and chlorine measurements of the base swimming pool?
During the busiest time of the day
What test do you use to obtain qualitative information on whether or not your water sample contains coliforms?
Presence/absence method
When is the only time you collect bacteriological samples of a hot tub and spa?
If an illness occurs as a result of someone using the hot tub or spa
What action should you take first if the bacteriological quality of the swimming pool water does not meet standards?
Collect repeat samples from the sections where you originally took samples
In the liquid sampling quality assurance/quality control (QA/QC) process, what is the difference between trip blanks and equipment blanks?
Trip blanks are provided by the laboratory
Why are proper collection protocol and preservation guidelines important elements of a quality assurance/quality control (QA/QC) program?
These ensure water quality data is accurate and useful
It is important to use a chain of custody form because it helps ensure sample integrity from _______
Collection to data reporting
You should seal your liquid sample containers because it _________
Helps detect unauthorized tampering of your samples
If any of your sampling equipment was contaminated it could cause _______
Invalid sampling results
Why do you need to use caution when using reagents to decontaminate sample equipment?
Reagents can leave residue on the sampling equipment
Water sample result interpretation is conducted by _____
Comparing results to a selected standard
What is not a consideration when conducting water sample result interpretation?
Correct personnel assigned to task
Sampling results must be properly documented according to _______
The latest data management system
