Proposed sediment contamination guidelines to look at chemical mixtures

Article Abstract:

The Environmental Protection Agency's (EPA) Science Advisory Board will review proposed sediment contamination guidelines that will address sediment contamination from chemical mixtures in the marine environment. The proposal came about after a model for determining polycyclic aromatic hydrocarbons toxicity was developed. EPA officials believe similar results from their sediment guideline determination experiments will justify the proposal. Critics, however, are wary that the regulators will use the sediment quality criteria as a "pass/fail" number.

Air, water, & solid waste management, Environmental Protection Agency, Testing Laboratories, Water Quality Testing Labs, Measurement, Water quality, Toxicity testing, Toxicity tests

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"Scientific uncertainty" scuttles new acid rain standard

Article Abstract:

The absence of new acid deposition standards in EPA's draft document on continued acid deposition on surface water angered state officials of the areas where the effects of acid rain are greatest. According to EPA, scientific uncertainty on the relationship between emissions of sulfur and nitrogen oxides and acidification prevents it from imposing an appropriate level of a standard for sensitive areas. It says that an approach based on effects is not a reason for imposing an emission reduction standards.

Emissions NEC, Air pollution control, Environmental protection, Sulfur, Nitrogen oxides, Acid rain, Acid deposition, Nitrogen oxide, Emissions (Pollution)

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EPA Great Lakes guidance hits a squall

Article Abstract:

The EPA has launched the Great Lakes Water Quality Guidance as its initial venture to establish water quality standards across regional and basinwide levels. The standards contain new methodologies for measuring the effects of bioaccumulative chemicals and set a two-tiered ranking system for data uncertainty. Opposition to the new rule has come from industry and Congress, primarily on questions over its cost-effectiveness.

Water Pollution Control, Pollution, Water pollution, Water quality management

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