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Page 18 of 24 <br />`, alscience <br />= nvir'onmenta! Quality Control - LCS/LCS Duplicate <br />„m aboratories, Inc. <br />Conestoga -Rovers & Associates Date Received: NIA <br />19449 Riverside Drive, Suite 230 Work Order No: 08-042322 <br />Sonoma, CA 95476-6955 Preparation: EPA 5030B <br />Method: LUFT GC/MS 1 EPA 8260B <br />Project: 3515 Navy Drive, Stockton, CA <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 />Date <br />Date <br />LCSILCSD Batch <br />Quality Control Sample IR <br />Matrix <br />Instrument Prepared <br />Analyzed <br />Number <br />099-12-717-35 <br />Solid <br />GCIMS LL 05106108 <br />05107108 <br />0805081.03 <br />LCS %REC <br />LCSD %REC <br />%REC CL <br />RPD <br />RPD CL Qualifiers <br />Parameter <br />TPPH <br />79 <br />75 <br />65-135 <br />5 <br />0-30 <br />88 <br />95 <br />70-130 <br />7 <br />0-30 <br />Benzene <br />Ethylbenzene <br />95 <br />95 <br />70-130 <br />0 <br />0-30 <br />93 <br />98 <br />70-130 <br />5 <br />0-30 <br />Toluene <br />94 <br />93 <br />70-130 <br />0 <br />0-30 <br />plm-Xylene <br />95 <br />93 <br />70-130 <br />3 <br />0-30 <br />o -Xylene <br />Methyl -t -Butyl Ether (MTBE) <br />98 <br />95 <br />70-130 <br />3 <br />0-30 <br />Teri -Butyl Alcohol (TBA) <br />105 <br />78 <br />70-130 <br />29 <br />0-30 <br />Diisopropyl Ether (RIPE) <br />87 <br />92 <br />70-130 <br />5 <br />0-30 <br />Ethyl -t -Butyl Ether (ETBE) <br />89 <br />92 <br />70-130 <br />3 <br />0-30 <br />Tert-Amyl-Methyl Ether (TAME) <br />94 <br />94 <br />70-130 <br />0 <br />0-30 <br />85 <br />41 <br />70-130 <br />70 <br />0-30 X <br />Ethanol <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 />