Field

Question 0

Quality control in the field is of the utmost importance, why?

Answer 0

activities in the field can be attributed to the greatest amount of variability in final results

Question 1

Along with pH and temperature Name 5 other Examples of Field Measurements

Answer 1

 Electrical conductivity
 Dissolved oxygen
 Turbidity
 Residual chlorine
 Hydrocarbon vapor
 Immunoassays

Question 2

Field quality control activities include….

Answer 2

-Collecting representative samples.
-Use of appropriate equipment.
-Proper sample handling and preservation.
-Proper chain-of-custody and preservation..
-Proper quality assurance (QA) and quality control (QC) in the field. Field equipment.
-Calibration.
-Documentation.
-Name; model; serial number; method of calibration; date and
time; solutions and concentrations; instrument response; and results of QC solution.

Question 3

What technique does a Immunoassay field test use

Answer 3

The technique uses the natural response of an organism to a foreign material as the mechanism of detection and measurement.
Note:
Biochemicals (called antibodies) are used to detect and/or measure environmental pollutants.

Question 4

In a immunoassays the concentration of the pollutant is inversely proportional to the intensity of what?

Answer 4

color

Question 5

Dissolved oxygen is a key measure of water quality, as well as the ability of a body of water to support life. A stable concentration of dissolved oxygen is required for what 2 processes

Answer 5

photosynthesis

cellular respiration

Question 6

The solubility of oxygen in water _______ as the temperature of water ________.

Answer 6

1) increases

2) decreases

Question 7

What are the five stages within an oxygen sag curve and explain them…

Answer 7

1. Clean zone
   a) Oxygen and bacterial levels are normal, and pollution has not been
   discharged.
2. Decomposition zone
   a) Pollutants have been released into the water system. The levels of dissolved oxygen begins to decline as the bacteria becomes active in decomposing the organic pollutant.
3. Septic zone
   a) Lowest concentration of oxygen is observed. Bacteria population reach maximum levels. The septic zone is complete once all the organic pollutions are consumed.
4. Recovery zone
   a) Dissolved oxygen levels begin to rise through aeration
   (turbulence/movement of the water system). Bacteria populations
   decline with the absence of food. 5. Clean zone
   a) Return to normal condition as seen in Stage 1. No pollution present, normal levels of dissolved oxygen and bacteria.

Question 8

calmer waters will have decreased measurements of …..

Answer 8

turbidity and conductivity, and increased observations of residual chlorine.