
 DOESTD11592003
d.
Explain the following water treatment processes.
Ion exchange
pH adjustment
Clarification
Solids handling
Disinfection techniques
Enhanced evaporation
Reverse osmosis
Electrodialysis
Carbon adsorption
Flocculation
Statistics
3. Waste management personnel shall demonstrate a familiarity level knowledge of
probability and simple statistics.
Supporting Knowledge and/or Skills
a.
State the definition of the following statistical terms:
Mean
Variance
Standard deviation of the mean
Median
Mode
Standard deviation
b.
Explain the structure and function of distributions.
c.
Calculate the mathematical mean of a given set of data.
d.
Calculate the mathematical standard deviation of the mean of a given set of data.
e.
Given the data, calculate the probability of an event.
f.
Describe how measures of samples (i.e., measures of central tendency and
variability) are used to estimate population parameters through statistical inference.
g.
Discuss Type I and Type II decision errors and the relationship to sampling and
confidence levels.
Hydrology, Geology, and Soil Science
4. Waste management personnel shall demonstrate a familiarity level knowledge of the
basic principles and concepts of hydrology, geology, and soil science.
Supporting Knowledge and/or Skills
a.
List the different soil textures (compositions) and soil structures.
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