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Advanced GeoEnvironmental, Inc. <br /> I GLDM/Geweke <br /> March 30, 1999 <br /> Page 2 <br /> COMMENT <br /> I General physicochemical levels associated with MW-14 remain slightly improved over those <br /> associated for MW-9 (as noted in our 9121198 report), but have shown reductions which are <br /> now approximating MW-9 values. Levels of bionutrients, especially those associated with <br />' MW-9 remain low and would be considered marginal for supporting continued growth and <br /> biodegradation. A selective (contaminant-biodegrading) subpopulation was not recovered <br /> during this sampling event, suggesting that levels of target hydrocarbons are at or near <br />' threshold values for microbial biodegradative growth and support. It would be helpful to <br /> review the analytical data relating to well-specific hydrocarbon concentrations to determine <br /> whether and to what degree low target hydrocarbon values are playing a role in the recovery <br /> of viable hydrocarbon-specific microorganisms. <br /> Should you have any questions concerning these results, please do not hesitate to contact me. <br /> AKK:ch <br /> I <br />