Water Distribution Grades 1 & 2 Practice test exam latest

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 Under the Surface Water Treatment Rule, disinfection residuals must be collected at the same location in the distribution system as - CORRECT ANSWER-coliform samples Iron can cause "red water" and thus customer complaints when its concentration is above its secondary maximum contaminant level of - CORRECT ANSWER-0.30 mg/L The goal of the Surface Drinking Water Act is for each ________ to accept primary enforcement responsibility (primacy) for the operation of the state's drinking water program. - CORRECT ANSWER-State What is the objective of Total Coliform Rule? - CORRECT ANSWER-To promote routine surveillance of distribution system water quality to search for fecal matter and/or disease-causing bacteria Which agency sets standards on the concentration levels of harmful contaminants in drinking water? - CORRECT ANSWER-EPA Explain the difference between the different tiers of violations. Which tier is the most serious? - CORRECT ANSWER-Tier 1 = 24 hours (most severe) Tier 2= 30 days Tier 3= 1 year A positive E. Coli test must be reported to the primacy health agency within what time period? - CORRECT ANSWER-24 hours How is the required number of monthly bacteriological samples determined? - CORRECT ANSWER-Population served What is the action level for lead in first-draw samples taken from customer taps? - CORRECT ANSWER-0.015 mg/L