2. The National ambient air quality standard for sulfur dioxide is 180 µg/m3. Assuming alifetime exposure (24 hr/day, 365 days/year) for an adult male of average body weight.What is the estimated lifetime CDI for this concentration? Assume the exposure durationequals the lifetime.

To estimate the Chronic Daily Intake (CDI) for sulfur dioxide for an adult male based on a lifetime…

Answered: 2. The National ambient air quality…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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18) Which of the following is often used as the indicator of indoor pollutants?A: COB: NOC: CO2D: PM2.5
8. The national ambient air quality standard for sulfur dioxide is 80 ug m-³. Assuming an amount of air breathed daily is 11.3 m³, what is the estimated lifetime exposure of an adult female of an average body weight of 65 kg and a life span of 75 years if she is exposed daily throughout the whole year?
The recommended threshold limit value (TLV-ACGIH) air concentration for occupational exposure to water-insoluble hexavalent chromium Cr (VI) is 0.01 mg/M3. This concentration assumes that the individual is generally healthy and is exposed for 8 hours per day 5 days per week (40 hour work week) over a working lifetime (that is from age 18 to 65 years). Assuming a body weight of 75 kg and an inhalation rate of 0.85 m3/h over the working life of the individual, a. What is the lifetime (75 y) CDI? b. Estimate the low-dose cancer risk from occupational inhalation exposure to hexavalent chromium Cr(VI).
Contaminant X is detected in a drink- ing water supply (4000 m³/day), and 94.99 percent of contaminant X must be re- moved to comply with federal water quality standards. If contaminant X has a "dimen- sionless" Henry's law constant, H, value of 0.25, then what is the design air-to-water flow ratio for an air stripping packed tower, assum- ing 3.5 times the minimum?
Please solve this problem and provide formula
Please choose the correct answer: 1. In water cycle, ______ brings H2O from water in a lake to vapor at atmosphere. A. evaporation; B. evapotranspiration; C. precipitation; D. infiltration 2. A drinking water well in NJ is seriously polluted due to saltwater intrusion. The major pollutant is _____. A. Oxygen demanding materials; B.salts; C. nutrients; D. toxic heavy metals 3. The real reason to cause saltwater intrusion is the different of _____ between freshwater and seawater. A. density; B. temperature; C. velocity; D. all of the above 4. Which of the following represents a non-point pollution source? A. Leaking underground gas tanks; B. CSO; C. urban runoff; D. an outlet of untreated industrial wastewater into a river
Total suspended particulate matter concentration in ambient air is to be measured using a high- volume sampler. The filter used for this purpose had an initial dry weight of 9.787 g. The filter was mounted in the sampler and the initial air flow rate through the filter was set at 1.5 m³/min. Sampling continued for 24 hours. The airflow after 24 hours was measured to be 1.4 m³/min. The dry weight of the filter paper after 24 hours sampling was 10.283 g. Assuming a linear decline in the air flow rate during sampling, what is the 24 hour average TSP concentration in the ambient air(in 10-6 g/m³?
A smokestack emits pollutant Z into the air on a sunny day. The effective stack height is 270 m. The wind speed is 4 m/s, due east. Your house is located 4.0 km due east of the smokestack. The ground level concentration of pollutant A is 2.0 mg/m3at your house. Your friend lives 4.0 km east and 1.5 km south of the smokestack. a. What is the emission rate of the pollutant in kg/s? b. For the emission rate determined in part a, you now want to know the concentration of pollutant Z at ground level at your friend’s house. i. What parameters change in the dispersion modeling equation? For each parameter, include the parameter symbol, a definition of the parameter, and its new quantitative value and required units.ii. Is the concentration at your friend’s house lower, the same or higher than the concentration at your house and why? (you do not need to calculate the concentration) show all work
The 1-hour National Ambient Air Quality Standard for nitrogen dioxide (NO2) is 0.10 ppmv. Calculate the corresponding concentration in mg/m3 at a temperature of 25°C? show all work
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Employees on the second floor of a multi-story office building have been complaining about indoor air quality. Employees are convinced that there's "something in the air" because several employees report they only have symptoms at work, and the symptoms disappear as soon as they leave the office. A consultant proposing to be an indoor air quality expert provided a report with the following information about air samples collected on the second floor: 1200-1300 ppm carbon dioxide62-78% relative humidity.05 ppm formaldehyde (direct reading colorimetric tube)278 – 372 counts/m3 total airborne mold spores inside8,390 – 11,150 counts/m3 total airborne mold spores outside That's all the information you have. What additional information do you need to be able to evaluate the situation? Begin your discussion with your initial impressions and interpretation of the "consultant's" information. What conclusions, if any, can you make from the test results provided? Then, provide at least two…

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2. The National ambient air quality standard for sulfur dioxide is 180 µg/m3. Assuming a lifetime exposure (24 hr/day, 365 days/year) for an adult male of average body weight. What is the estimated lifetime CDI for this concentration? Assume the exposure duration equals the lifetime.