Quiz 5 question 1 Darcy s velocity is proportional A B C D E Only with hydraulic gradient dh dL Only with Hydraulic conductivity K Only with Porosity 1 min A B None of the above Quiz 5 question 2 Darcy s velocity is true velocity of groundwater A Smaller than B Greater than C The same as 1 min Quiz 5 question 3 Spills of organic chemicals that contact the ground sometimes reach the groundwater table where they are then carried down gradient with the groundwater flow The following chemicals have been spilled Atrazine log Koc 2 35 Anthracene logKoc 4 11 DCM logKoc 1 15 List the chemicals in term of their retardation factors lowest to highest 1 min A B C D Atrazine DCM Anthracene DCM Atrazine Anthracene Anthracene Atrazine DCM DCM Anthracene Atrazine Quiz 5 question 4 TCE is a common solvent used in many industries Spill of TCE can severely contaminate groundwater You are hired to stop the spread of the plume What technology will you choose A B C D Bioremediation Conventional pump and treat Permeable reactive barrier None of the above 1 min Quiz 5 question 5 The averaged sorbed velocity equal to 1 min A The Darcy s velocity B The true velocity which equal Darcy s velocity divided by the porosity C The ratio of true velocity divided by retardation factors D None of the above Quiz 5 question 6 The bioconcentration factor BCF equal to 1 min A The ratio of concentration of chemical found in soil sediment organic matter divided by the concentration of chemical found in water B The ratio of concentration of chemical found in octanol divided by the concentration of chemical found in water C The ratio of concentration of chemical found in biota divided by the concentration of chemical found in water D None of the above I feel prepared for exam problems on groundwater contamination A B C D Strongly agree Agree Disagree Strongly disagree Answers 1 2 3 4 5 6 D A B B C C
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