final

Question 0

The sampling of groundwater wells requires _____ of wells before sample collection in order to eliminate stagnant water.

Answer 0

Purging

Question 1

Sampling of groundwater is affected by

Answer 1

aquifer depth, recharge rate, soil permeability, topography and the type of analyte, such as volatility or persistence in environment.

Question 2

Considerations must be given to three things while sampling groundwater wells

Answer 2

well’s diameter, depth and recharge rate.

Question 3

Each well should be ________,_______ or ______ tested to determine the hydraulic conductivity of the formation and to estimate the extent and rate of purging prior to sampling.

Answer 3

slug, pressure or pump

Question 4

In general, a sample should only be taken after what 3 things have stabilized

Answer 4

pH, electrical conductivity and temperature

Question 5

what is a piezometer and what does it measure?

Answer 5

measure fluid pressures such as groundwater elevations and pore pressures when buried directly in embankments and fills.

Question 6

Name the 5 classes of water bodies

Answer 6

Class I: Potable water supply.
Class II: Shellfish propagation and harvesting.
Class III: Recreational propagation and maintenance of fish and wildlife.
Class IV: Agricultural water supply.
Class V: Navigation, utility and industrial use.

Question 7

The number and type of samples to collect depends on a variety of factors, including:

Answer 7

Width.
Depth.
Discharge point.
Amount of suspended sediment. Aquatic life present.

Question 8

What is the best sample to take to find the max [ ] of contaminate

Answer 8

A discrete grab sample

Question 9

What is a Secchi disk and how do you use it?

Answer 9

A Secchi Disk is a circular disk to measure the transparency of a body of water.
The analyst lowers the disk until it disappears from view. Just as it disappears, the analyst measures the depth. The disk is lowered further and then slowly raised until the disk comes in view. The depth is measured again. The average of the measured depths provides the Secchi Disk reading.

Question 10

Different factors must be taken into account when sampling Rivers and Streams

Answer 10

Accessibility.
o Point of contamination.
o Flow rate.
o Changes in stream or river channel. o Type of bed, depth and turbulence. o Structure present.
o Safety.

Question 11

Different factors must be taken into account when sampling Lakes

Answer 11

Accessibility.
Spatial stability.
Thermal stability.

Question 12

Different factors must be taken into account when sampling groundwater

Answer 12

Site of contamination.

Purification and treatment processes.