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Mr. Kevin McKibben(AGE) <br /> AGF/Chevrolet <br /> February 25, 2000 <br /> Page.2 <br /> CO_ MNI=NT <br /> Samples from both wells yielded very similar physicochemical-res Its,.with:values. considered <br /> to.be adequate to support microbial growth and biodegradative activity; however.;•comparative <br /> microbiological,recoveries v�rere dissimilar. While samp a M.W.-21 B.yielded moderatelevels.of <br /> both general and selective subpopulations•.(ovec2l%o:biodegraders)', sample MW-, 1A yielded <br /> only a •relatively:, small amount of general. (heterotrophic) microbes,, and : no selective <br /> biodegraders: Such results may indicate localiied biotoxicity, which has'not.only suppressed <br /> oVeiall`microbial :.growth, but has significantly infiibited the development of an appropriate. <br /> selective microbial subpopulation; This effect may.be diminished over time..With._localized <br /> dilution and dispersion of contaminants;•however, :at present,.there js no evidence that <br /> bi`oattenuation is-'occurring for within water represented by this sample Conversely, •there is <br /> am le.evidence of ongoing bioattenuation for vvater. represented by sample MW-21 B. It will <br /> p, 9 J. <br /> be.important.however,to.,ensure that necessary bionutrient.concentrations.remaiin at sufficient <br /> levels.to maintain .ongoing ini' Bial growth,and metabolic activity.. <br /> Should you haVe any'questions concerning these results, please do noti hesitate to contact me. <br /> AKK:em <br />