Trichloroethene (TCE) is a common groundwater contaminant. In terms of cancer risk, which would be better: (1) to drink un-chlorinated groundwater groundwater with 10 ppb TCE, or (2) drink surface that, as a result of chlorination, contains 50 ppb chloroform. Assume a 30-year consumption period. The potency factor for TCE is 1.1.10-2 (mg/kg day)-1 and the potency factor for chloroform is 6.1.10-3 (mg/kg day)-1. (Risk for TCE = 1.35.10-6)

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Q: The old H. A. Blooms wastewater treatment plant discharges secondary effluent to a lake that is…

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Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.