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Page 13 of 21 <br /> aiscience <br /> nvironmental Quality Control - PDS/PDSD <br /> aboratories, Inc. <br /> ICL Performance Products LP Date Received: 02/26/14 <br /> 10667 Jersey Blvd. Work Order: 14-02-1802 <br /> Rancho Cucamonga, CA 91730-5110 Preparation: EPA 3050B <br /> Method: EPA 6010B <br /> Project: Stockton AB Page 1 of 1 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed PDS/PDSD Batch <br /> Number <br /> 14-02-1868-1 Sample Solid ICP 7300 02/27/14 00:00 02/28/14 19:39 140227S01 <br /> 14-02-1868-1 PDS Solid ICP 7300 02/27/14 00:00 02/28/14 19:43 140227S01 <br /> 14-02-1868-1 PDSD Solid ICP 7300 02/27/14 00:00 02/28/14 19:44 140227S01 <br /> Parameter Sample Spike PDS PDS PDSD PDSD %Rec.CL RPD RPD CL Qualifiers <br /> Conc. Added Conc. %Rec. Conc. %-Re c. <br /> Antimony ND 25.00 20.51 82 20.43 82 75-125 0 0-20 <br /> Arsenic 2.381 25.00 29.47 108 28.43 104 75-125 4 0-20 <br /> Barium 88.32 25.00 112.1 95 110.0 87 75-125 2 0-20 <br /> Beryllium 0.6783 25.00 26.66 104 26.60 104 75-125 0 0-20 <br /> Cadmium ND 25.00 23.49 94 23.60 94 75-125 0 0-20 <br /> Chromium 23.82 25.00 49.05 101 48.13 97 75-125 2 0-20 <br /> Cobalt 10.01 25.00 34.54 98 34.59 98 75-125 0 0-20 <br /> Copper 10.12 25.00 35.87 103 36.15 104 75-125 1 0-20 <br /> Lead 6.643 25.00 29.15 90 29.55 92 75-125 1 0-20 <br /> Molybdenum ND 25.00 24.09 96 24.33 97 75-125 1 0-20 0 <br /> U <br /> Nickel 17.12 25.00 40.41 93 40.17 92 75-125 1 0-20 0 <br /> Selenium ND 25.00 20.67 83 21.33 85 75-125 3 0-20 <br /> Silver ND 12.50 10.89 87 10.55 84 75-125 3 0-20 <br /> Thallium ND 25.00 20.93 84 20.97 84 75-125 0 0-20 <br /> Vanadium 47.97 25.00 73.42 102 72.09 96 75-125 2 0-20 <br /> Zinc 66.53 25.00 90.66 97 90.28 95 75-125 0 0-20 <br /> RPD:Relative Percent Difference. CL:Control Limits <br /> 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 <br />