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Jul 11 '90 17: 12 OOO1 DAMES "1I0DRE/FRESNO TEL -222-19 37 PAGE 05/16 <br /> L <br /> Chevron U.S.A. - Page 4 <br /> For more detailed information regarding the results of <br /> Chemical analysis, please refer to the attached Certified <br /> Analytical Reports. <br /> The aerating soil was field screened at the time of <br /> composite sampling. The field screening was conducted with <br /> and HNu photoionization detector. The locations sampled and <br /> results obtained are presented on Plate 3 at the end of the <br /> text. It should be recognized that field screening can be <br /> affected by site conditions and should not be interpreted <br /> as quantitative results . <br /> At the request of Mr. John Randall of Chevron U.S.A. , <br /> at the commencement of the aeration process it was specified <br /> to loosely-place a lift of soil for aeration without benefit <br /> of periodic mechanical aggravation. Although chemical <br /> analysis of composited samples suggest the aeration process <br /> has been substantially successful, some detectable <br /> hydrocarbons yet remain in apparent isolated areas of the <br /> treated stockpile. <br /> As the chemical analysis of the stockpiled soils <br /> reported concentrations of petroleum hydrocarbons, it is <br /> Dames & Moore's opinion that the current remedial action plan <br /> needs to be slightly modified. At your request, and in <br /> 1 <br /> DAMES 5L N1OORE <br />