Lead-based paint testing technologies: summary of an EPA ...

A field duplicate paint sample was taken approximately 9 inches away from the primary paint sample at 10% of the test locations in the full study. Median and 95th percentiles of ratios of largest to smallest measurements were 1.6 and 3.7 in Denver; 1.3 and 2.1 in Philadelphia. ... U.S. Environmental Protection Agency: A Field Test of Lead-Based ... ................
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