A fuel mixture of benzene, toluene, ethylbenzene at mole fractions 0.075, 0.065, and 0.035 respectively equilibrates with the atmosphere at 25$^oC$
Determine:
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A well with effective diameter of 0.5 m fully penetrates an aquifer that has a uniform saturated thickness of 10 m. One hundred grams of benzene are spilled into the well, immediately dissolve, and mix into the water in the well. The seepage velocity is 30 m/yr in the x-direction, the longitudinal dispersivity is 1.0 m, and the transverse dispersivity is 0.1 m. The aquifer has the following characteristics:
Determine:
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The following data for concentration of TCE were taken at a single monitoring well. Use the Mann-Kendall test (pp. 458-460) to determine whether the concentration has an upward or downward trend.
Date | TCE (ppb) |
---|---|
9/92 | 8 |
12/92 | 19 |
3/93 | 21 |
6/93 | 13 |
9/93 | 39 |
12/93 | 24 |
3/94 | 28 |
6/94 | 25 |
Determine:
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