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Lamar County Multi- Jurisdictional Hazard Mitigation Plan <br />Chapter Three <br />cook stoves, lanterns, etc., but unfortunately these energy sources emit carbon monoxide which <br />can build to lethal levels in confined areas. More than 400 people die each year from this <br />odorless gas. <br />Table 7: Carbon Monoxide Levels <br />0.1 ppm <br />Natural background <br />atmosphere level <br />0.5 to 5 ppm <br />Average background <br />level in homes <br />Levels near properly <br />5.0 to 15.0 ppm <br />adjusted gas stoves in <br />homes <br />Headache and <br />35 ppm <br />dizziness within six to <br />eight hours of <br />constant exposure. <br />Mexico City central <br />Slight Headache in <br />100 ppm to 200 ppm <br />area from <br />100 ppm <br />two to three hours <br />automobiles <br />Slight headache <br />200 ppm <br />within two to three <br />hours <br />Frontal headache <br />400 ppm <br />within one to two <br />hours <br />Dizziness, nausea <br />and convulsions <br />1600ppm <br />within 45 minutes. <br />Insensible within two <br />hours. <br />Headache, dizziness <br />3200 ppm <br />and nausea in five to <br />ten minutes. Death <br />within 30 minutes <br />5000 ppm <br />Chimney of a home <br />Headache and <br />wood fire <br />6400 ppm <br />dizziness in one to <br />7000 ppm <br />Undiluted warm Car <br />two minutes. Death in <br />exhaust <br />less than 20 minutes <br />Unconsciousness <br />30,000 ppm Undiluted <br />128 —ppm <br />after 2 -3 breaths. <br />cigarette smoke <br />Death in less than <br />three minutes. <br />115 <br />