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JEH Quiz #4 (January/February 2014)

Featured Article:
“Effects of Centralized and Onsite Wastewater Treatment on the Occurrence of Traditional and Emerging Contaminants in Streams"
 


Available to NEHA members only, the JEH Quiz, offered six times per calendar year through the Journal of Environmental Health, is a convenient tool for self-assessment and an easily accessible means to accumulate continuing-education (CE) credits toward maintaining your NEHA credentials.

It's a simple process...

  1. Read the featured article in the Journal.

  2. Select the correct answer to each JEH Quiz question and click on the Submit button at the bottom of the page.

  3. One CE credit will be applied to your account with an effective date of January 1, 2014 (first day of issue).

Quiz deadline: April 1, 2014 (Completed)


JEH Quiz #4 Answers
January/February 2014

1. d
2. b
3. c
4. a
5. b
6. b
7. c
8. b
9. d
10. a
11. b
12. a


 


1.


Nationwide, an estimated __ gallons of untreated sewage are discharged annually through leaking or overflowing sewer lines.

a.

1 million

b.

3-10 million

c.

1 billion

d.

3-10 billion


2.


From the study data, streams draining residential areas showed relatively __ differences with respect to the type of wastewater treatment utilized in that area.

a.

no

b.

small

c.

large


3.


All of the following are considered emerging contaminants in streams from wastewater with the exception of

a.

hormonally active compounds.

b.

personal care products.

c.

nutrients.

d.

pharmaceuticals.


4.


In a 1999–2000 survey, pharmaceutical compounds, hormones, and other organic compounds were detected in __ of the streams sampled.

a.

80%

b.

70%

c.

60%

d.

50%


5.


Onsite wastewater treatment systems are used by about __ of the U.S. population.

a.

20%

b.

30%

c.

40%

d.

50%


6.


Which of the two counties sampled in this study had the highest number of residents relying on onsite wastewater treatment?

a.

Durham County.

b.

Orange County.


7.


It is estimated that __ of U.S. septic systems are older than the estimated effective lifespan of an onsite wastewater treatment system.

a.

11%

b.

30%

c.

50%

d.

72%


8.


Overall, NO2+NO3-N concentrations were statistically higher in samples from sites in areas of centralized wastewater treatment than from sites in areas of onsite wastewater treatment.

a.

True.

b.

False.


9.


Concentrations of __ were lower in samples from sites in areas of onsite wastewater treatment than from sites in areas of centralized wastewater treatment.

a.

chloride

b.

chloride and nitrogen

c.

calcium

d.

potassium and sulfate


10.


The greatest number of pharmaceuticals (six) was detected in samples from a site which is located in an area of __ wastewater treatment

a.

centralized

b.

onsite


11.


The highest coliform densities for the June 1 and June 16 sampling periods were detected in samples from a site that is located in an area of __ wastewater treatment.

a.

centralized

b.

onsite


12.


The results of the study indicate that properly functioning onsite wastewater treatment systems had little effect on stream quality.

a.

True.

b.

False.

 


 


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