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This article refers to extended validation experiments based on the EPA 314.0 method in support of the ISO development work.
The extended method validation proves the applicability of IC based on the EPA 314.0 method for the determination of trace amounts of perchlorate in water samples of different origin.
THg concentrations in unfiltered, undiluted natural water samples determined using the optimized CV-ICP-MS method were compared with concentrations determined by cold vapor atomic fluorescence spectrometer (CV-AFS) based on the EPA method 1631.
The DEQ was forced to deny the permit on January 3, 2013, based on the EPA position on CR 595.
All emissions are estimated considering average real world city and highway operation based on the EPA 5-cycle label methodology, using a weighted 55% city and 45% highway driving.
Years of use were adjusted based on the EPA registration dates.
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In addition to the elevated cancer rates observed, Maryland ranked 12th among all states in estimated mean risk from cancer-causing air pollutants, based on the U.S. EPA's 1996 NATA estimates (U.S. EPA 2002a).
The method is based on the U.S. EPA 5030C (purge-and-trap for aqueous samples) method (U.S. EPA 2003) and is accredited by the Australian National Association of Testing Authorities.
Based on the U.S. EPA's proposed cancer slope factor for iAs of 25.7 per milligram per kilogram per day (U.S. EPA 2010), the average daily exposure at this level this would result in approximately 3.7 additional cases of bladder and/or lung cancer per 100,000 persons with lifetime exposure.
Criteria were developed based on the U.S. EPA measurements of total and Highly Credible Gastrointestinal Illnesses (HCGI), which correlated with E. coli densities (r = 0.804) in fresh recreational waters (Dufour [1984]).
Although most advisories are based on the U.S. EPA's RfD for MeHg established in 2000 (NRC 2000), a few are based on the FDA action level established in 1979, which is approximately four times higher (Tollefson and Cordle 1986).
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