Last week’s “Return to ACC’s Room 221” implied that Ron McMahan tested recently obtained dust and air samples at the behest of Corinne Irwin; in fact, Irwin says McMahan offered to perform the testing on the samples but did not act on any request from her. Also, the only room having renovation and abatement performed is room 221; Austin Community College officials say room 318 (the chemistry lab above 221) was already fully cleaned and brought up to modern standards in 2005. (See “ACC: Rio Grande Is Safe,” in “Postmarks.”)

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