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However , I find that Petitioner 's staff did conduct an adequate investigation into Resident # 27 's allegations . The surveys were conducted the last day of the term without advance notice . They denied conducting any proactive media relations work at all . During the previous decade , safety experts had conducted a comprehensive , multifaceted , school - and community-based education program , yet helmet use remained only 31 % among bicycle riders.21 One year after the legislation was enacted , helmet use ( measured by observational surveys ) increased to 75 % , and the number of bicyclists killed or hospitalized with a head injury decreased by 51 % . ATSDR recommended conducting a second indoor radon test in residents ' homes where radon was detected .