An Inventory of Carcinogenic Substances Released into the Ambient Air of California. Final Report -Task II and IV

摘要

Task II of this report locates suspected California sources of the eleven candidate carcinogenic materials identified in Volume I and inventories the emissions. Task IV discusses in considerable detail methodologies for the sampling and assaying of the candidate carcinogens. Seventeen prime emission sources are identified in Task II including a major steel mill, several refineries and chemical manufacturers, secondary smelters, power utilities and asbestos mining and manufacturing operations. Annual estimated emissions range from 1.5-150 tons per year. Three candidate materials, chloroform, ethylene dibromide and nitrosamines are either emitted in insignificant amounts or are emitted by area sources not amenable to sampling within the confines of the project. Generally, recommended sampling for the remaining compounds utilize the Environmental Protection Agency's Method 5 sampling train, modified for certain materials. Recommended analytical methods include gas chromatography, mass spectrometry, high performance liquid chromatography or a combination of these methods, including photometry. Atomic absorption utilizing graphite furnaces may be used for metals analysis. Methods for the sampling and analysis for arsenic, asbestos and polycyclic organic materials (POM) require special considerations.