water distribution questions With Accurate Answers

The number of monthly distribution system bacteriological samples required is - ANSWER-Based on population served what is the maximum contaminant level for total trihalomethanes (TTHM) in the US? - 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 - ANSWER-coliform samples Iron can cause "red water" and thus customer complaints when its concentration is above its secondary maximum contaminant level of - ANSWER-0.30 mg/L The goal of the Surface Drinking water act for each ___________ to accept primary enforcement responsibility (primacy) for the operation of the state's drinking water program? - ANSWER-state What is the objective of the Total Coliform Rule? - 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 contamination in drinking water? - ANSWER-US Environmental Protection Agency Explain the difference between the different tiers of violations. Which one is the most serious? - ANSWER-Tier 1is an acute MCL violation requiring public notification within 24 hours. Tier 2 notification must occur within 30 days. Tier 3 requires notification within one year. A positive E. coli test must be reported to the primacy health agency within what time period? - ANSWER-24 Hours How is the required number of monthly bacteriological samples determined? - ANSWER-Populations served What is the action level for lead in first-draw samples taken from customer taps? - ANSWER-0.015 mg/L A water system is designated a community public water system if it serves how many homes? - ANSWER-15 or more What authority provides specific water sampling instructions? - ANSWER-The state primacy agency According with the Lead and Copper Rule, what is the action level for lead? - ANSWER-0.015 mg/L Head is measured in - ANSWER-feet