10.8 ARCRA landfill is characterized by diurnal variations in the volatilization of contaminants as a result of changes in temperatures, wind speed, and activity at the site. The most prevalent contaminant, benzene, follows the pattern: 8 A.M.-9 A.M. 9 A.M.-10 A.M. 10 A.M.-11 A.M. 11 A.M.-12 P.M. 12 P.M.-1 P.M. 1 P.M.-2 P.M. 2 P.M.-3 P.M. 3 P.M.-4 P.M. Benzene Concentration (ppm) 5 8 8 9 11 14 11 10 Determine the TWA for benzene concentrations at the landfill.
10.8 ARCRA landfill is characterized by diurnal variations in the volatilization of contaminants as a result of changes in temperatures, wind speed, and activity at the site. The most prevalent contaminant, benzene, follows the pattern: 8 A.M.-9 A.M. 9 A.M.-10 A.M. 10 A.M.-11 A.M. 11 A.M.-12 P.M. 12 P.M.-1 P.M. 1 P.M.-2 P.M. 2 P.M.-3 P.M. 3 P.M.-4 P.M. Benzene Concentration (ppm) 5 8 8 9 11 14 11 10 Determine the TWA for benzene concentrations at the landfill.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:10.8 ARCRA landfill is characterized by diurnal variations in the volatilization of contaminants as a result of changes in
temperatures, wind speed, and activity at the site. The most prevalent contaminant, benzene, follows the pattern:
8 A.M.-9 A.M.
9 A.M.-10 A.M.
10 A.M.-11 A.M.
11 A.M.-12 P.M.
12 P.M.-1 P.M.
1 P.M.-2 P.M.
2 P.M.-3 P.M.
3 P.M.-4 P.M.
Benzene Concentration
(ppm)
5
8
8
9
11
14
11
10
Determine the TWA for benzene concentrations at the landfill.
10.9 Using Lewis (2012) or online resources, find the TLV and STEL of
a. Benzene
b. Vinyl chloride
c. p-Dichlorobenzene
d. Toluene
e. Nonane
10.10 An air sample collected at a RCRA 90-day storage facility contains 8 ppm toluene, 12 ppm PCE, and 25 ppm MEK.
a. What is the TLV-TWA for the mixture?
b. Has the TLV been exceeded?
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