Environmental survey results.

aEach location was visited a total of 12 times with 5 samples collected at each visit for a total of 30 samples during the day and 30 during the night.bDay includes the hours between 8 AM and 8 PM. Night includes the hours between 8:00 PM and 8:00 AM. Samples were collected at 2-hour intervals.cFisher exact P-value for the difference in proportion between day and night.dP-value for difference between four mean proportions = 0.71.eP-value for difference between four mean proportions = 0.44.