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Page 18 of 36 <br /> alscience <br /> n vironmenfal <br /> Quality Control - Spike/Spike Duplicate <br /> aborafories Inc. ` <br /> Cardno ERI Date Received: 03/17/12 <br /> 601 North McDowell Blvd. Work Order No: 12-03-1242 <br /> Petaluma, CA 94954-2312 Preparation: EPA 3010A Total <br /> Method: EPA 6010B <br /> Project ExxonMobil99CAS/022789C <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> W-32-MW1 Aqueous ICP 5300 03119/12 03/20/12 120319SA5 <br /> Parameter SPIKE ADDED MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Arsenic 0.5000 110 114 80-140 3 0-11 <br /> Cadmium 0.5000 103 106 82-124 3 0-7 <br /> Lead 0.5000 104 107 84-120 3 0-7 <br /> Selenium 0.5000 109 112 79-127 3 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 />