Inquiry: White House delaying chemical tests

The GAO investigation focused on the EPA’s computerized database, known as IRIS — the Integrated Risk Information System. It contains data on the human health effects of exposure to some 540 toxic chemicals in the environment. New chemicals are being proposed constantly for inclusion under a complicated assessment process that can take five years or more.

After years of stops and starts, the GAO said, the EPA has yet to determine carcinogen risks for a number of major chemicals such as:

• Naphthalene, a chemical used in rocket fuel and manufacturing a wide range of commercial products, including mothballs, dyes and insecticides. It is a major source of contamination at many military bases. The EPA wants to determine if it should be reclassified from a “possible” to “likely” human carcinogen. A long-standing dispute with the Pentagon over the chemical prompted the White House in 2004 to initiate a new EPA policy requiring more interagency involvement in assessing the health risks of a chemical. “Six years after the naphthalene assessment began, it is now back at the drafting stage,” said the GAO.
• Trichloroethylene, or TCE, a widely used industrial degreasing agent and a common contaminant in air, soil and both surface and ground water. The EPA in 2001 issued a draft assessment that TCE is “highly likely to produce cancer in humans.” Interagency reviews have concluded more outside studies are needed. “Ten years after EPA started ... the TCE assessment is back at the draft development stage,” the GAO said.
• Perchloroethylene, or “perc,” a chemical widely used in dry cleaning fabrics, degreasing metal and making chemical products. The EPA began its risk review of perc a decade ago and an interagency review was completed two years ago. Since then the assessment has been in limbo because of a dispute among senior EPA officials over what the cancer risk assessment should be. The dispute has prevented the proposed assessment from being forwarded to the National Academy of Science for peer review.
• Formaldehyde, a colorless, flammable gas used to make plywood and other building materials, which the EPA has been reviewing since 1997 to determine if should be upgraded from a “probable” to a “known” carcinogen. The EPA does not expect to complete that review for another two years.
• Royal Demolition Explosive, or RDX, a chemical explosive used in munitions and classified as a possible human carcinogen. The chemical is known to leach from soil to groundwater. The EPA began a risk assessment of the chemical in 2000 but has made minimal progress, the GAO said.

Environmentalists say these chemicals have been widely found at military bases and Superfund sites and in soil, lakes, streams and groundwater.

The findings, after an 18-month investigation by the congressional watchdog agency, come at a time of growing criticism from members of Congress and health and environmental advocates over alleged political interference in the government’s science activities.

Last week, a confidential survey by an advocacy group of EPA scientists showed more than half of the 1,600 respondents worried about political pressure in their work.

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