November 27, 2006: EPA Settles Past Cleanup Costs for $2.1 M
The U.S. Environmental Protection Agency (EPA) reached settlement agreements requiring companies that allegedly contributed to groundwater contamination at the San Gabriel Valley Superfund site (near Los Angeles) to reimburse the EPA $2.1 million, and to repay the California State Department of Toxic Substances Control $16,000 for past cleanup costs. Contaminates (including perchlorates) were found at the site in 1984. Click here to read more from the EPA.
November 2, 2006: Federal Judge Dismisses Perchlorate Suit
A federal judge in Los Angeles dismissed a lawsuit filed by the City of Colton against suspected perchlorate polluters, finding that the city did not follow proper procedures for making a claim under federal law. The lawsuit, filed last year, alleged that the defendants were responsible for contaminating the city's drinking water. The nearby City of Rialto filed a similar federal lawsuit and hoped to join its case with Colton's. The cost of cleaning up the Rialto-Colton basin is estimated to be in the hundreds of millions of dollars.
October 5, 2006: CDC Links Perchlorate Exposure to Thyroid Problems
The Centers for Disease Control and Prevention (CDC) reported the results of a recent study on the relationship between exposure to low doses of perchlorate and thyroid hormone levels. According to the study, the relationship was strongest in women with lower iodine intake; that is, with levels of iodine in their urine less than 100 micrograms per liter. Perchlorate exposure was associated with small-to-moderate size changes in levels of thyroxine (which helps regulate the body's metabolism) as well as the hormone responsible for stimulating its production. Click here to read more from the CDC.
August 30, 2006: No Settlement Reached in Rialto-San Bernardino County Perchlorate Lawsuit
In January 2004, the city of Rialto, California filed a lawsuit against 41 entities (including the U.S. Department of Defense, San Bernardino County, and several fireworks manufacturers) alleging perchlorate contamination in groundwater basins. Rialto seeks damages and recovery costs for cleanup of perchlorate contamination in these basins. Recent efforts to negotiate a settlement with San Bernardino County have failed.
August 28, 2006: California Proposes Standard for Perchlorate in Drinking Water
The California State Department of Health Services (CDHS) has announced a proposal to set a maximum contaminant level (MCL) for perchlorate in drinking water of 6 parts per billion (ppb). If the proposed standard is adopted, public water systems cannot provide drinking water that exceeds a MCL without notifying customers and taking steps to bring their water supply into compliance with drinking water regulations. Click here to read more from the California Department of Health Services.
July 28, 2006: Massachusetts Sets High Standard for Perchlorate in Drinking Water
Massachusetts became the first state to set drinking water and waste site clean up standards for perchlorate. Massachusetts set the standard at 2 ppb, and now requires most public water systems to regularly test for perchlorate. Click here to read more from the Massachusetts Department of Environmental Protection.
January 26, 2006: EPA Issues Guidance for Protective Cleanups of Perchlorate
The U.S. Environmental Protection Agency (EPA) announced that it is setting a preliminary clean-up goal of 24.5 ppb for perchlorate in water. The EPA announced that this preliminary goal is a starting point for an evaluation of site-specific conditions, and that final clean-up determinations should take site-specific information into consideration. Click here to read more from the EPA.
November 18, 2005: Companies Agree to Pay Perchlorate Cleanup Costs at California Superfund Site
Sixteen companies (including Lockheed Martin, Mobil Oil, and Philip Morris USA) have agreed to pay $14.5 million to the federal government and $346,000 to the State of California to pay for cleanup costs at the Baldwin Park area of the San Gabriel Valley superfund site. Contaminants, including perchlorates, were found at the site in 1984. The Department of Justice estimates that more than $100 million has been spent at the site for the construction and operation of water treatment systems.
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