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�s I E (C) 1989 BIO NATIONAL CORPORATION 6 BACEGROUND TO BIORM4RDUITION AND OZ0S'l; TREATrMT COMBINATIONS 6.1 A PJMY4W OF lT SITZ) BIGREMEDIATION AND A DEVELOPMENTAL APPROACH _ TO ITS BROADER AP?LICATION. ','AMR EXTRACTION AIDED BY MICROBIAL ACN01V - In a paper presented by Fd Fall, of Converse Environmental Co., Pasadena, California, a recognized vapar extraction remediation firm, up to 50% of the effect rf vapor extraction on a project in Modesto, California, ie. the inducement of ;ndigeti►ous microbes to feed on contamination in place. This was measured by the change in COz level of extracted vapors from the induced ambient air. _. Since COs is a breakdown component of hydrocarbon biodegradation, the firm concluded that indigenous organisms were the source of tho CO2 has. In most cases, the combined efforts of indigenous organisms arid va •or extraction are slow in fulfilling the task at hand. M AER47TON IS A NECESSARY RLR4R!47' AW ANY AEROBIC BIODEGRADATION OF CONTAJLWANTS, - In vapor extraction, air is being forced through the contamination plume to sweep vapors to the surface treatment unit. WATER IS ALSO NECESSARY FOR l►NCROBIAL GROW7W TO OCCUR AT TRE HYDROCARBON-WATER INTERFACE. - If there is significant micr; 1 action also taking place, as reported, there must also be water present for this to be possible. _ TEE RFFIC1ENT AND SAFE SOLUTION - Bio National Corporation, by introducing a high concentration of aerobic, non-pathogenic, naturally occurring microbes into the zone of contairination, is bringing enough force to bear to overcome the violation done to the soil environment by the hydrocarbon contamination. The process we have developed is a design variation from an original variance application with DOHS,/Alternative Technologies Section. The primary concern addressed by ATS is the introduction of water into a vadose zone too close to ground water. PLUMB DRIVING - A reasonable fear is the possibility of driving the plume of contamination into the water table. However, numerous approv id projects have included the introduction of water, hydrogen peroxide, and nutrients for the purpose of inducing indigenous organisms to perform, even in contaminated groundwater. There is really no difference in the BNC procedure, except for an extraordinary attempt to.deal with potential - plume driving, and the introduction of efficient, specific'organisms. 6 HOLT805 .