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Page 5 of 16 <br /> 9 alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> STANTEC Date Received: 12/14/10 <br /> 3017 Kilgore Road, Suite 100 Work Order No: 10-12-1103 <br /> Rancho Cordova, CA 95670-6141 Preparation: EPA 3050B <br /> Method: EPA 6010B <br /> Project ARCO Service Station No. 6080 <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 10-12-1203-10 Solid ICP 5300 12/15/10 12/16/10 101215501 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Lead 102 86 75-125 11 0-20 <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 />