EPA assessment not justified

Article Abstract:

The conclusions contained in the EPA's report on the health risks which may arise from exposure to dioxin and dioxin-like compounds are not based on adequate scientific evidence. While dioxin and related substances have been associated with certain toxicologic problems in animals in laboratory studies, exposures known to result in human background body burdens are much smaller than those believed to result in toxicity. The EPA report should have focused on the question of whether dioxin can result in health problems at or close to current background body burdens.

Administration of Public Health Programs, Health Problems Prevention Programs, Health aspects, Evaluation, Reports, United States. Environmental Protection Agency, Health risk assessment, Preventive medicine, Dioxin, Dioxins

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Selection of reactive mixtures for use in permeable reactive walls for treatment of mine drainage

Article Abstract:

Porous, permeable, geochemically reactive walls prove useful in remediating metal-contaminated groundwater derived from oxidized mine wastes. The permeability and reactivity of eight organic-carbon reactive mixtures were investigated. Batch tests conducted within 40-70 days have decreased SO4 concentrations from initial concentrations of 1200-4800 mg/L to <10 mg/L in four mixtures. Results reveal that it is possible to obtain the different levels of reactivity and permeability necessary for remediating tailings-impacted groundwater.

Research and Development in the Physical, Engineering, and Life Sciences, Water Pollution Control R&D, Groundwater & Lakes Pollution, Research, Environmental aspects, Water pollution control, Water pollution, Groundwater, Reactivity (Chemistry), Water pollution research, Mine drainage

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California's Prop 65: a better way to regulate?

Article Abstract:

California's "Safe Drinking Water and Toxic Enforcement Act of 1986" or Proposition 65 has inspired a similar bill in Massachusetts which requires industries to inform the public of any toxic substances present in their products. Proposition 65 gives industries the responsibility to publish warning labels on products to warn consumers of any hazardous chemicals present in the product. The Massachusetts law expands on the older law by including endocrine disrupter and neurotoxins in its list.

Safe Drinking Water, Laws, regulations and rules, Massachusetts, Poisons, Drinking water, Carcinogens

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