| Abstract |
The report gives results of measurements of specific chemical species in emissions from two waste-oil-fired commercial heaters. The species were identified earlier in a Level 1 analysis of similar emissions. One heater utilized a vaporizing pot, and the other, an air atomization combustion chamber. Polynuclear aromatic hydrocarbons (PAHs) were analyzed in gaseous emissions from both units. Elemental analyses (including Pb, Fe, Cd, Zn, Cl, and Br) were performed on the air atomization discharges. Analyses also were conducted on these emissions to measure possible organolead constituents and to determine the distribution of iron oxidation states (Fe(II) versus Fe(III)). In addition, several waste crankcase oils were tested for the elemental species of interest to establish baseline levels for emission data and to determine the effect on metal concentrations of both filtration and sedimentation during storage. Elevated levels of PAHs were found in emissions from both heaters. Elevated levels of metallic species also were found, and Fe(III) was determined to be the major form of iron in combustion emissions from the waste-oil-fired air atomization heater. Since combinations of certain PAHs and Fe(III) have been shown to promote certain types of mammalian cancers, these results indicate a potentially serious health hazard. |
