Lingering concerns after a January chemical spill close West Virginia schools . The amounts range from less than half a part per billion to 1.6 parts per billion -- well below the safe level of 1 part per million set by the Centers for Disease Control and Prevention . A January spill dumped 10,000 gallons of a methanol compound into a nearby river . The substance is used in the production of gasoline and other fuels, but it can also be harmful to humans if inhaled or ingested.
Lingering concerns after a January chemical spill close West Virginia schools . A January spill dumped 10,000 gallons of a methanol compound into a nearby river . The substance is used in the production of gasoline and other fuels, but it can also be harmful to humans if inhaled or ingested.