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Page 18 of 43 <br />AW <br />alscience <br />nvironmenfa/ Quality Control - Spike/Spike Duplicate <br />i aborafories, Inc. <br />Cardno ERI <br />Date Received: <br />05/26/11 <br />601 North McDowell Blvd. <br />Work Order No: <br />11-05-1637 <br />Petaluma, CA 94954-2312 <br />Preparation: <br />EPA 3010A Total <br />128 <br />Method: <br />EPA 6010B <br />Project ExxonMobil99CAS/022789C <br />Cadmium <br />96 <br />100 <br />Date <br />Date MS/MSD Batch <br />Quality Control Sample ID <br />Matrix Instrument Prepared <br />Analyzed Number <br />11-05-1603-1 <br />Sea Water ICP 5300 05127111 <br />05127111 110527SA6 <br />Parameter <br />MS %REC <br />MSD %REC <br />%REC CL <br />RPD <br />RPD CL Qualifiers <br />Arsenic <br />123 <br />128 <br />80-140 <br />4 <br />0-11 <br />Cadmium <br />96 <br />100 <br />82-124 <br />4 <br />0-7 <br />Lead <br />95 <br />99 <br />84-120 <br />4 <br />0-7 <br />Selenium <br />110 <br />118 <br />79-127 <br />7 <br />0-9 <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 />