The local population is worried about their exposure to SO2 from Factory A mentioned in the previous question. EPA has determined a safe household exposure limit of 75 ppb, based on a 3-year average of 99th percentile of the yearly distribution of 1-hour daily maximum concentrations of SO2 in air. Assuming a 4 times dilution for every 100 ft traveled by the gas, what is the allowed average daily concentration of SO2 right next to Factory A? Factory A is located 1,000 ft away from the closest houses. O 79 ppm, O 3.0 ppby O 0.3 ppby 0.75 ppm,
The local population is worried about their exposure to SO2 from Factory A mentioned in the previous question. EPA has determined a safe household exposure limit of 75 ppb, based on a 3-year average of 99th percentile of the yearly distribution of 1-hour daily maximum concentrations of SO2 in air. Assuming a 4 times dilution for every 100 ft traveled by the gas, what is the allowed average daily concentration of SO2 right next to Factory A? Factory A is located 1,000 ft away from the closest houses. O 79 ppm, O 3.0 ppby O 0.3 ppby 0.75 ppm,
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The local population is worried about their exposure to
SO2 from Factory A mentioned in the previous question.
EPA has determined a safe household exposure limit of
75 ppb, based on a 3-year average of 99th percentile of
the yearly distribution of 1-hour daily maximum
concentrations of SO2 in air. Assuming a 4 times dilution
for every 100 ft traveled by the gas, what is the allowed
average daily concentration of SO2 right next to Factory
A? Factory A is located 1,000 ft away from the closest
houses.
O 79 ppm,
O 3.0 ppbv
0.3 ppby
O 0.75 ppmy
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