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Page 9 of 17 <br /> alscience <br /> , nvironmental Quality Control - Duplicate <br /> aboratories, Inc. <br /> Shell Oil Pipeline Company LP Date Received: N/A <br /> P.O. Box 2648 Work Order No: 09-09-1933 <br /> Houston, TX 77252-2648 <br /> Project: 25705 Patterson Pass Rd., Tracy, CA <br /> Matrix:Aqueous or Solid <br /> Parameter Method QC Sample ID Date Analyzed Sample Conc DUP Conc RPD RPD CLualifiiers <br /> pH EPA 9045D 09-09-1912-1 09/25/09 7.40 7.42 0 0-25 <br /> Paint Filter Liquids EPA 90956 09-09-1720-4 09/28/09 ND ND NA 0-25 <br /> RPD-Relative Percent Difference, CL-Control Limit <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />