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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 /> DAMES & MOORE <br />