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Homework_5 - 1.34 WASTE CONTAINMENT AND SITE REMEDIATION...

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1 1.34 WASTE CONTAINMENT AND SITE REMEDIATION TECHNOLOGY HOMEWORK 5 – DUE APRIL 13, 2003 Question 1 Attached are maps showing a chemical company at which there has been a past release or releases of volatile organic chemicals including 1,1,1-trichloroethane (1,1,1-TCA), tetrachloroethylene (PCE), trichloroethene (TCE), and benzene, toluene, ethylbenzene and xylene (BTEX) among others. The site is underlain, from shallow to deep, by sand and gravel, and weathered and limestone bedrock. The bedrock aquifer contains fractures and solution cavities, making it a conductive and productive aquifer. Aquifer tests indicate that the hydraulic conductivity of the aquifer is about 2 x 10 -1 cm/sec. 1,1,1-TCA, TCE, and related compounds have been found in the limestone at the MW-7 well cluster in high concentrations, as well as at the MW-3 and MW-6 clusters (see Figure 1 and Table 1). These chemicals have not been found at the MW-8 well cluster. Nonetheless, there is concern that the contaminants could migrate to public water supply wells 14 and 16,
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Homework_5 - 1.34 WASTE CONTAINMENT AND SITE REMEDIATION...

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