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I <br /> Alpha Analytical, Inc. <br /> I <br /> J <br /> I <br /> I <br /> Ii <br /> I <br /> July 19, 2010 <br /> i <br /> i <br /> Cheryl Haines <br /> Arcadis-US ! <br /> 1410 Rock Ridge'Drive <br /> Roseville, CA 95661 <br /> RE: Kent is Oil Service <br /> Dear Ms. Haines, <br /> 1 <br /> We received several work orders for TPH-DRO from the Kent's OiI Service site. The samples <br /> primarily contained-heavy-end material that would be consistent with asphalt. Much of this <br /> material also elutes in the DRO range and was reported as DRO with the "L" footnote indicating <br /> that the reported Concentration includes contributions from the heavy-end material. <br /> i <br /> Sample SS-1 andi'SS-2 also contained minor amounts of diesel fuel hydrocarbons. The diesel <br /> fuel fingerprint that is present primarily elutes out past C12. Due to the loss of the volatile <br /> portion of the diesel fingerprint it is likely that this material is considerably weathered. <br /> i <br /> I <br /> Yours truly, j <br /> an y Gardner <br /> Alpha Analytical,Inc. <br /> i <br /> E <br /> f <br /> i <br /> i <br /> f <br />