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1 <br /> a[UoE laboratories "c"v"o <br /> APR 2 7 2001 <br /> 4ns'd- <br /> April 24, 2001 <br /> Ground Zero Analysis,Inc. <br /> Attn: Greg Stahl <br /> 1714 Main Street <br /> Escalon, CA 95380 <br /> RE: Proj.No.329-Knowles Rock—Chromatographic Data Interpretation/Observations <br /> Sampling Date: 02/22/01 <br /> Matrix: Soil <br /> As per your request,I am sending you copies of chromatographic data for the TPH-gas/BTX&E analysis <br /> for the following samples: <br /> Sample ID Lab No. <br /> KR CB3-20 B02364 <br /> KR CB3-30 B03265 <br /> I also included a copy of the gasoline standard chromatograph for reference. <br /> After a careful review of the chromatographic data,it can be concluded that the concentration of the <br /> lighter components of gasoline range hydrocarbons has diminished significantly in proportion to the <br /> heavier fraction. However,without further information,I can not determine if this was caused by external <br /> events,such as treatment of the soil,or possibly aged(degraded gasoline). <br /> If you have any further questions,please feel free to contact me at your convenience. <br /> Sincerely, <br /> � <br /> �'- Lt <br /> Hiram Cueto <br /> Lab Director <br /> Argon Labs <br /> 3037 Fikh St., Ceres, CA 95307 • Phone: (209) 581-9280 • Fax: (209) 581-9282 <br />