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HOUSTON LABORATORY <br /> 8580 INTERCHANGE DRIVE <br /> HOUSTON,TX 77054 <br /> (713)660-0901 <br /> Case Narrative for: <br /> Shell Oil Company <br /> Certificate of Analysis Number: <br /> 04061001 <br /> Report To: Pro ect Name: INC#N/A <br /> i <br /> Clayton Group Services Site: Shell-Tracy Pump Station <br /> Michael Hurd Site Address: Tracy Pump Station <br /> 6920 Koli Center Parkway,Ste.216 Tracy CA <br /> Pleasanton PO Number: <br /> California State: California <br /> 94566- State Cert. No.: 01142CA <br /> ph (925)426-2673 fax: Date Reported: 7!9104 <br /> Results are reported on a wet weight basis unless dry-weight correction is denoted in the units field on the analytical report("mg*g-dry <br /> "or"uglkg-dry ). <br /> Your samples were analyzed for Diesel Range Organics by the California LUFT Manual method. The reported DRO result is for carbon <br /> 'M ranges C10 through C35. <br /> Matrix spike(MS)and matrix spike duplicate(MSD)samples are chosen and tested at random from an analytical batch of"like"matrix to <br /> check for possible matrix effect.The MS and MSD will provide site specific matrix data only for those samples which are spiked by the <br /> laboratory.Since the MS and MSD are chosen at random from an analytical batch,the sample chosen for spike purposes may or may not <br /> have been a sample submitted in this sample delivery group.The validity of the analytical procedures for which data is reported in this <br /> analytical report is determined by the Laboratory Control Sample(LCS)and the Method Blank(MB).The Laboratory Control Sample(LCS) <br /> and the Method Blank(MB)are processed with the samples and the MS/MSD to ensure method criteria are achieved.throughout the entire <br /> ' analytical process. <br /> Your sample ID"B2 @ 4.0-4.5"'(SPL ID: 04061001-05)was randomly selected for use in SPL's quality control program for the TCLP <br /> Diesel Range Organics analysis by the California LUFT Manual method. The MS and MSD recoveries were outside of the advisable quality <br /> control limits for Batch ID: 39027 due to matrix interference. A Laboratory Control Sample(LCS)was analyzed as a quality control check <br /> for the analytical batch and all recoveries were within acceptable limits. <br /> Any other exceptions associated with this report will be footnoted in the analytical result page(s)or the quality control summary page(s). <br /> f Please do not hesitate to contact us if you have any questions or comments pertaining to this data report.Please reference the above <br /> Certificate of Analysis Number. <br /> This report shall not be reproduced except in full,without the written approval of the laboratory.The reported results are only <br /> representative of the samples submitted for-testing. <br /> SPL,Inc.is pleased to be of service to you.We anticipate working with you in fulfilling all your current and future analytical needs. <br /> 04061001.Page 1 <br /> 719104 <br /> Erica Rodgers Date <br /> Project Manager <br />