[en] The contents include: analytical protocols--(scanning electron microscopy and energy dispersive x-ray analysis; total bromine and chlorine by neutron activation analysis; analysis for ethylene in ambient air; sampling and direct analysis for methyl chloride and methyl bromide in ambient air; sampling and analysis for methyl chloride, methyl bromide, vinyl chloride and vinyl bromide in ambient air; sampling and analysis for chlorinated and brominated hydrocarbons and other chemicals in ambient air; chlorine/bromine sampling and analysis in ambient air; determination of inorganic fluoride in ambient air; acid mist sampling in ambient air; sampling and analysis of volatile halogenated hydrocarbons in soil, sediment, water, vegetation and milk; sampling and analysis of semi-volatile halogenated hydrocarbons in air, soil, sediment, water and biota; ozone measurements); 2) atmospheric dispersion modeling; 3) meteorological data; and 4) hourly ozone concentrations in El Dorado, Arkansas