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0 <br />r a/science <br />nvironmental Quality Control - Spike/Spike Duplicate <br />aboratories, Inc. <br />Page 7 of 24 <br />Conestoga -Rovers & Associates Date Received: 04/26/08 <br />19449 Riverside Drive, Suite 230 Work Order No: 08-04-2322 <br />Sonoma, CA 95476-6955 Preparation: EPA 30508 <br />Method: EPA 6010B <br />Project 3515 Navy Drive, Stockton, CA <br />Date Date MS/MSD Batch <br />Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br />108-05-0292-5 Solid ICP 5300 05/03/08 05/04/08 080503S06 j <br />Parameter <br />MS %REC <br />MSD %REC <br />%REC CL <br />RPD <br />RPD CL <br />Qualifiers <br />Antimony <br />27 <br />29 <br />50-115 <br />6 <br />0-20 <br />3 <br />Arsenic <br />90 <br />97 <br />75-125 <br />6 <br />0-20 <br />Barium <br />4X <br />4X <br />75-125 <br />4X <br />0-20 <br />Q <br />Beryllium <br />104 <br />108 <br />75-125 <br />3 <br />0-20 <br />Cadmium <br />104 <br />108 <br />75-125 <br />4 <br />0-20 <br />Chromium <br />118 <br />115 <br />75125 <br />1 <br />0-20 <br />Cobalt <br />94 <br />89. <br />75-125 <br />4 <br />0-20 <br />Copper <br />116 <br />117 <br />75-125 <br />1 <br />0-20 <br />Lead <br />106 <br />105 <br />75-125 <br />0 <br />0-20 <br />Molybdenum <br />87 <br />88 <br />75125 <br />1 <br />0-20 <br />Nickel <br />117 <br />111 <br />75125 <br />3 <br />0-20 <br />Selenium <br />97 <br />97 <br />75125 <br />0 <br />0-20 <br />Silver <br />96 <br />94 <br />75125 <br />2 <br />0-20 <br />Thallium <br />100 <br />99 <br />75125 <br />1 <br />0-20 <br />Vanadium <br />112 <br />112 <br />75125 <br />0 <br />0-20 <br />Zinc <br />110 <br />113 <br />75-125 <br />1 <br />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 />