Zero tolerance--even a little mercury is too much.
Blyth
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PL
D004782:Environmental Health; D017408:Guidelines as Topic; D015386:Hazardous Substances; D006801:Humans; D008284:Maintenance and Engineering, Hospital / Q000592:standards*; D008628:Mercury / Q000633:toxicity*; D016134:Organizational Policy; D011367:Professional Staff Committees; D014481:United States; D018505:Waste Management / Q000379:methods / Q000592:standards*
D015386:Hazardous Substances; D008628:Mercury