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HEALTH AND SAFETY RESEARCH AND TESTING CENTER

BUREAU OF MINES

4800 FORBES AVENUE

PITTSBURGH, PENNSYLVANIA 15213

ANALYSES OF AIR SAMPLES

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Frick District

PERCENT BY VOLUME

CUBIC FEET

CARBON DIOXIDE

OXYGEN METHANE

CARBON MONOXIDE

NITROGEN

AIR PER MINUTE

CUBIC FEET

METHANE IN

24 HOURS

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