Module 3 Flashcards
What was the purpose of lab 3?
To determine the source of the water being pumped from the W4 well
What are aquifers
Geologic formations comprised of permeable material (e.g., sand,
gravel, porous or fractured limestone, sandstone or highly fractured rock)
- large pore spaces, well connection
What is permeability
a measure of the ease of passage of liquids or gases or specific chemicals through the material
What are aquitards
Geologic formations comprised of relatively low‐permeability material (silt, clay, till, shale), that do not transmit significant amounts of groundwater
- small pore spaces, low connectivity
What was the purpose of water quality sampling for lab 3
- determining the sources of well 4 water
- determine if well 4 water quality is acceptable
What was the water tested for?
Temperature, specific conductance, dissolved oxygen, chloride, nitrate.
Water at each location is compared to well water to see which is closest.
What are monitoring wells for?
Monitoring groundwater quality and get water level data
What are the two options for obtaining a groundwater sample from a well?
Pump/purge stagnant water before sampling
Carefully sample water just in the screen interval (low flow/passive sampling)
What are the main findings for glacial aquifers?
- Contaminants from geologic sources (particularly arsenic and manganese)
- concern for drinking water - Concentrations of nitrate and pesticides low in fine‐grained sediments even in areas of intensive agriculture
- Chloride concentrations increasing in urban areas
- “Nuisance” constituents in groundwater from the glacial aquifer system could limit groundwater use.
Do glasses and gloves need to be worn for the chloride analysis?
Yes
Why are chloride and nitrate tests more of a health and safety concern?
could be exposed to the cadmium or chromium contained in the reactants added to the water.
What does MSDS stand for?
Material safety data sheet
When comparing the color of the sample ampoules to the color comparator ampoules of the kit, should you do it in the light or shade?
Shade
Does a more blue sample ampoule mean more or less dissolved oxygen?
more
Is specific conductance and electrical conductance the same thing?
Yes
