Under contract with the California Air Resources Board, Eureka Laboratories, Inc. has conducted a study to evaluate degreasing alternative methods/solvent systems with the objective of reducing or eliminating the use of organic solvents for degreasing applications. This study included both hydrocarbon emissions and cost as primary criteria in the evaluation of degreasing processes. In achieving the objectives of the study, the project was conducted in three parts. The first part was devoted to collection of data concerning degreasing methods, their costs and hydrocarbon emissions in 1976 from degreasing users which included mainly the manufacturing and service-maintenance industries. Data were collected by questionnaire surveys and by reviewing literature on the subject. The second part identified alternative degreasing processes through literature review and analyses of survey responses. Tile last part studied the potential emission reduction and costs incurred in the use of photochemically less reactive or non-reactive degreasing alternatives. Based on findings of this study, the estimated TOG emission from degreasing operations in 1976 was 119.7 TPD and 38.6 TPD for ROG. Aircraft parts manufacturing and service-maintenance industries, which include automotive repairs and oil well maintenance operations, were the major contributors to hydrocarbon emissions resu1ting from degreasing operations. Emissions from automotive repairs and oil well maintenance operations represented 27 percent of TOG and 85 percent of ROG due to degreasing operations. Primary degreasing alternative processes recommended for these industries are alkaline washing and emulsion cleaning methods, but the annual costs for using these alternatives are higher than those for solvent degreasing. These recommendations are preliminary and should be evaluated on an experimental basis.
For questions regarding this research project, including available data and progress status, contact: Research Division staff at (916) 445-0753
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