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Advanced GeoEnvironmental, Inc. <br /> GLDW/Geweke <br /> October 13, 1999 <br /> Page 2 <br /> COMMENT <br /> Levels of bionutrients remain relatively low for both water samples, and are particularly <br /> reduced for water associated with MW-14.--Water from this also yielded-higher.general <br />' and selective microbial subpopulations than from the previous sampling event, suggesting <br /> increased microbial bionutrient utilization. Selective biodegrading microbes were encountered <br /> from both wells during this event, but a higher percentage was recovered from MW-9. The <br /> comparative microbiological data suggest that the target contaminant is the predominant <br />' hydrocarbon in MW-9, whereas alternative carbon sources may be playing a more pronounced <br /> role in MW-14. Supplementation with appropriate bionutrients is again recommended for both <br />' wells in order to improve microbial metabolic activities and population growth, as present <br /> levels appear to be approaching threshold limits, particularly for MW-14. <br />' Should you have any questions concerning these results, please do not hesitate to contact me. <br /> AKK:ch <br /> r . <br /> lip <br /> i <br /> • <br /> i <br />