BEO160829 Block 5 & 6 Flashcards
When analyzing water characteristics, what are three things to identify?
* Physical - turbidity, color, odor, taste
* Chemical - pH, mineral content
* Bateriological
What does the zone of saturation contain?
It contains only water present in the pores of the earth.
When is Health Risk Assessment Sampling done?
Is done after a contamination release but before clean up to determine the extent of the containation and if there are any hazards to personnel or the environment.
We assign health risk classification to any cross-connection that could introduce contamination to a potable water system?
* Aircraft watering points
* CDC
* SAP
* DOD schools
A _____ aquifer has impermeable layers of rock above and below.
Confined
What are potential sampling objectives?
* ID health risks to workers/community
* Define Area of Concern
* Analyze/reduce health risks
* Making control health decisions.
When is Remediation Sampling performed?
ID’s the existence and concentration of any contamination after clean up.
What is sieving?
Sorts a sample to obtain uniform sample SIZE.
* Not for VOCs
What method of disinfection is used as an expedient method when no other options are available?
Boiling
What are two types of non-statistical sampling strategies?
- Biased
- Judgemental
A_____ aquifer has a permeable layer above it.
Unconfined
What are items to identify when determing a suitable, potable water source?
* is there enough volume at all times?
* Is there potential exposure points for contamination above the collection point?
What regulations are followed overseas?
If the host-nation has regulations, those are followed. Otherwise follow OEBGD. The primacy agency may be MAJCOM BEE
What are the disadvantages of surface water as a source for water?
* High chance of contamination
* Requires security to ensure safety
What is Stratified Random Sampling?
* Statistical
* Used for large sites
* Used when there are different types of soil.
What is Systematic Grid Sampling?
* Best for minimizing bias
* Provides complete coverage
* Most Common
What is the BE role in regards to cross-connections and backflow prevention?
We assign health risk classification to any cross-connection that could introduce contamination to a potable water system
What is a composite sample?
Combines and homogenizes several soils samples.
* Cost effective
* Not for VOCs
* Creates an average concentration for an entire area.
What is Hot Spot Sampling?
* Used for small areas
* High contaminant concentrations
What are disadvantages of groundwater as a source of water?
* Higher mineral content
* Difficult to access
* Difficult to quantify (determine volume available)
At CONUS locations, how long do you have to submit analytical data to the primacy agency?
10 days
What does the National primary drinking water standard control?
It is a specific list of parameters with Minimum Contamination Limits (MCLS) that must be met for drinking water.