Volume 5 Flashcards
OEH Risk Assessment (100 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.
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 publically and commercially supplied drinking water?
Safe Drinking Water Act (SDWA).
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 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).
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 is the common type of water treatment used at Air Force (AF) installations?
Disinfection.
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
25 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 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 hazard classification for a cross-connection is also defined as contamination?
High.
Which 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.
Water vulnerability assessments (WVA) should be done or updated at deployed locations
during each rotation.