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A truck spils 1 gallon of benzene into an aquifer with an area= 50ft^2 Benzene has a solubility of 1750 ppm, and a specific gravity of 0.873. The aquifer ahs a porosity of 0.25, a hydraulic gradient of 0.004 and a hydraulic conductivity of 1000 gpd/ft2.
a. what is the discharge through the aquifer in gpd?
b. How long will it take the water in the aquifer to travel 100 ft?
c. How long will it take to remove 99% of the benzene from the aquifer? Assume that the volume of aquifer affected is 500 ft^2
A stabilization pond is designed for a 35-day detention time. If the pond is maintained at a capacity of 40 acre-feet, what is theaverage gpd flow to the stabilizaiton pond?
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Calculate the number-average molecular weight of a random nitrile rubber [poly(acrylonitrile- butadiene) copolymer] in which the fraction of butadiene repeat unit is 0.30
There are three reactors degrading a chemical biologically, at three degradation rates; i.e., 0.2 d^-1, 0.4 d^-1, and 1.0 d^-1. The residence time of the chemical in these reactors are 10 d, 5 d, and 55 d, respectively
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At a confining pressure of 2000 psi, the first sample failed at 9000 psi. Then at a confining pressure of 5000 psi, the other sample failed at 21,000 psi. Plot the two test results on a shear stress-normal stress diagram and draw in Mohr envelope.
Calculate the work necessary to compress air in an isolated cylinder from a volume of 6 ft^3 to a volume of 1.2 ft^3. The initial pressure and temperature are 30.0 psia and 50 degree F, respectively.
The company Eco-Safe is adding pollution control equipment to its process and reducing emission of pollutants. The annual waste disposal cost of the current process is $130,000 and the annual operating cost is $600,000
Would you expect to find the Tapeats Sandstone on top of the Great Unconformity in all places in the Grand Canyon? Why, or why not?
A direct shear test is performed on a saturated specimen of loose sand. A normal stress equal to 100 kPa is applied and a maximum shear stress of 75 kPa is measured in the shear test. Determine the principal stresses and the orientation of these p..
The blade height is 1.0 m, and the inlet radius of the rotor is 7.0 m. The flow exits the turbine in a radial direction. (a) If the angle between the radial direction and the absolute velocity at the inlet is 30o
design a horizontal curve for a two lane road. The road has 12 ft. lanes. Due to expensive excavation, it was determined that a maximum of 34 ft. can be cleared from the roads centerline towards the inside lane to provide for stopping sight distan..
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