Volume 5 Unit 1 Flashcards
(31 cards)
What type of aquifer would cause water to be pushed in a well above the land surface?
Artesian
Groundwater is stored in _____
unsaturated and saturated zones
Which constituent is not commonly found in groundwater?
Nitrate
Which installation must comply with the Department of Defense (DOD) Final Governing Standards (FGS) or Environmental Governing Standards (EGS)?
Royal Air Force (RAF) Feltwell, United Kingdom
What dissolved gas needs to be at an adequate level to prevent drinking water from tasting flat?
Oxygen
Which Environmental Protection Agency (EPA) drinking water standard is a guideline that applies to the cosmetic effects of drinking water?
Secondary
What law passed by congress established a federal program to monitor and increase the safety of all publicly and commercially supplied drinking water?
Safe Drinking Water Act (SDWA)
What program is designed to ensure the protection of groundwater supplied by public water systems by protecting the area around the well head from all types of contamination?
Well Head Protection Program (WHPP)
Which is the common type of water treatment used at Air Force (AF) installations?
Disinfection
What is the minimum average number of individuals served daily and the number of days per year required for a system to be classified as a public water system?
25 individuals for 60 or more days per year
Which disinfection method provides a disinfectant residual?
Free chlorine
After a water main is installed and at the end of a 24-hr holding period filled with chlorinated potable water, the free chlorine residual must not be less than _____
10 mg/L
During a water main break repair, which water pressure will not require the water main to be disinfected and tested for coliform before being place back into service?
25 psi
What is the most practical means of removing contamination introduced during water main repairs?
Flushing
What method of chlorination may be used if the pipes and components are kept clean and dry during the construction?
Tablet
What hazard classification for a cross-connection is also defined as contamination?
High
What describes the backward flow of water in the distribution system due to decreased pressure (i.e., line break) in the potable distribution system?
Backsiphonage
How often is the Water System Backflow Prevention/Cross-Connection Survey done on all facilities?
Every five years
What is not a critical element examined and evaluated during a sanitary survey?
Security
What results does a sanitary survey provide the installation?
Current and potential threats to water quality and system reliability
What sanitary survey element are you addressing when you identify a discrepancy that tank vents and overflows are not screened or protected?
Finished water storage
Which military field water standard is designed to prevent acute illness?
Short-term potability (STP) standards
Air Force Instruction (AFI) 10–246, Food and Water Protection Program, states Air Force (AF) water supplies are ______
credible targets
What should not be included in the consumer confidence report?
The formulas used to reach the assessment results on local contamination
