Maximum contaminant level Study guides, Class notes & Summaries
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AWWA ABC Water Distribution Grades 1 & 2 Exam | 143 Questions And Answers Already Graded A+
- Exam (elaborations) • 13 pages • 2023
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Which agency sets legal limits on the concentration levels of harmful contaminants in potable water 
distributed to customers? - US Environmental Protection Agency 
The number of monthly distributions system bacteriologiacal samples required is - Based on the 
population served 
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - 
0.080 mg/L 
Under the Surface Water Treatment Rule, disinfection residuals must be collected at the same location 
in the di...
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Stormwater Management Exam 1 Graded A 2024 100% Verified
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List the 5 characteristics that make water unique - stable, high specific heat, great buffer, expands at freezing, excellent solvent 
 
Why is it critical that water stores a lot of energy? - allows large bodies of water to cool or heat Earth to maintain a temperature 
 
List the elements of the hydrologic cycle including driving forces - 1/2-Evapotranspiration 
3-Condensation 
4-Precipitation 
5-Runoff 
6-Inflitration 
7-Subsurface flow 
8-Base flow 
9-Concentrated surface flow 
10-interflow (s...
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TCEQ questions with correct answers
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New Surface water reservoirs in Texas? CORRECT ANSWER-declines in certain areas. 
 
Sequestering manganese question? CORRECT ANSWER-Does not allow manganese to combine with oxygen. 
 
Lead % in pipe and solder and flux? CORRECT ANSWER-Max lead is 0.25%, lead and solder flux 0.2% 
 
Action level for Lead? CORRECT ANSWER-Lead action level is .015% 
 
How do you know you have a TTHM MCL violation? CORRECT ANSWER-Locational running average of all samples exceeds TTHM maximum contaminant level is .08...
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Water Distribution(203/2024 Latest Update)Correct 100%
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Potable water may be defined as: 
 
a. Any water that occasionally may be polluted from another source 
b. Any water that, according to recognized standards, is safe for consumption 
c. Water high in organic content 
d. Water that has been transported from outside the service area - ANSWER b). Any water that according to recognized standard is safe for human consumption. 
 
To prevent the entry of surface contamination into a well is the purpose of: 
 
a. The well casing 
b. The louvers or slots...
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Water Operator Certification Study Material (New Mexico) 100 Questions with 100% Correct Answers | Verified | Latest Update 2024
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What is MCL? - Maximum Contaminent Level (MCL) 
A public water system is any system that serves a population greater that or equal to ? - 15 services 
connections or 25 people regulary 
What is the Maximum total chlorine residual allowed by the Disinfectant-Disinfection By-Prouducts Rule 
- 4 mg/l 
What type of contaminant is Iron? - Secondary 
Which Primary Contaminant is sometimes added to water supplies to prevent tooth decay? - 
Fluoride 
The Failure of a public water system to comply with t...
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Water Distribution Exam Questions and Answers 100% Correct
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To prevent the entry of surface contamination into a well is the purpose of: 
 
a. The well casing 
b. The louvers or slots 
c. Well development 
d. The sanitary seal - ANSWER-d) The Sanitary Seal 
 
Pure water will exhibit a pH value of? 
 
a. 0.0 
b. 7.0 
c. 10.5 
d. 14.0 - ANSWER-b) 7.0 
 
A pH reading of 6.0 units indicates that the water sample is: 
 
a. Very acidic 
b. Slightly alkaline 
c. Very alkaline 
d. Slightly acidic - ANSWER-d) Slightly Acidic 
 
In drinking water quality, "TDS" ...
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AWWA ABC Water Distribution Grades 1 & 2|143 Questions with 100% Correct Answers | Verified | Updated 2024
- Exam (elaborations) • 14 pages • 2024
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Which agency sets legal limits on the concentration levels of harmful contaminants in potable water distributed to customers? - ️️US Environmental Protection Agency 
 
The number of monthly distributions system bacteriologiacal samples required is - ️️Based on the population served 
 
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - ️️0.080 mg/L 
 
Under the Surface Water Treatment Rule, disinfection residuals must be collected at the sam...
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Water Distribution Grades 1 & 2 Practice test exam latest
- Exam (elaborations) • 10 pages • 2024
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Water Distribution Grades 1 & 2 Practice 
test exam latest 
Which agency sets legal limits on the concentration levels of harmful contaminants in 
potable water distributed to customers? - CORRECT ANSWER-US Environmental 
Protection Agency 
The number of monthly distributions system bacteriologiacal samples required is - 
CORRECT ANSWER-Based on the population served 
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united 
States? - CORRECT ANSWER-0.080 mg/L 
Un...
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Water Treatment 1- ADEQ Comprehensive Exam A score
- Exam (elaborations) • 31 pages • 2024
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Water Treatment 1- ADEQ Comprehensive Exam A score 
 
What are the 3 responsibilities of any public water supplier? - 1. Provide water to meet all public demand 
2. Provide palatable and potable water 
3. Deliver water when needed 
 
What are 3 examples of public water usage? - 1. Domestic 
2. Industrial 
3. Agriculture 
 
What is GWUDI water system? - Ground Water Under Direct Influence of surface water 
 
What is the most common type of ion exchange water treatment process? - Water softeners 
...
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Water Distribution Exam Sample Text Questions and Answers(RATED A)
- Exam (elaborations) • 10 pages • 2024
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What is the federal law that protects public water supplies from harmful contaminants? - ANSWER SDWA Safe Drinking Water Act 
 
MCL stands for - ANSWER Maximum Contaminant Level 
 
True or False? 
 
Primary regulations are mandatory - ANSWER TRUE 
 
Secondary regulations are about what 3 things? - ANSWER Taste 
Odor 
Color of water
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