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L <br /> 7.0 CONCLUSIONS AND RECOMMENDATIONS <br /> f The analytical results of soil from the bioremediated treatment cell indicate that BTEX <br /> constituents were non-detect and TPH as diesel ranged from non-detected to 32 ppm. <br /> The highest value for TPH diesel was cell #7 which was sampled back in October, <br /> 1.993 and is most_likely much lower at this time. The analyses show that the <br /> a bioremediation of diesel impacted soils from the excavated site have lowered <br /> i `concentrations to well below the regulatory criteria of 100 ppm for TPH (diesel) and <br /> non-detected for BTEX: Therefore, AGI recommends closure of the Derickson trucking <br /> M site. <br /> 4 9.0_LIMITATIONS <br /> ji <br /> AquaGeosciences, I.nc. performed this investigation .in accordance with <br /> generally accepted standards of care which exist in California at this time. It <br /> I should.be recognized that definition and evaluation of geologic conditions is a <br /> E.: <br /> - difficult and inexact science. Judgments leading to conclusions and <br /> recommendations are generally made with limited knowledge of surface <br /> conditions present. No warranty expressed or implied, is made. <br /> _ u <br /> r _ <br /> is <br /> _ -9 of 9 <br />