The primary objective of this project was to prepare case histories of incidents which employed stimulation of naturally occurring bacteria in petroleum contaminated ground water as a means of speeding up removal of the contaminants. The second objective was to characterize those bacteria to an extent that would be helpful to future microbiologists in obtaining permits from governmental agencies to carry out useful programs of restoring water systems.
The original program (see Appendix I) envisaged the writing of several case histories of spills in which bacterial stimulation was either under consideration or had been employed to speed up removal of a petroleum product. It has been subsequently determined that additional facts over and above those reported by API publications (1, 11) are not forthcoming from the principals involved. We have therefore concentrated our efforts on what we believe to be the first large-scale intentional stimulation of a naturally occurring bacterial population associated with a gasoline spill.
The API Task Force Panel OS 21 was assigned the responsibility of monitoring this case history preparation. The authors of this report wish to acknowledge the contributions of the task force members in this effort.