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Page 21 of 24 <br /> alscience �o w U Roy <br /> _nvironmental Quality Control - LCS/LCS Duplicate Q° <' <br /> mw aboratories, Inc. <br /> ne r <br /> Parsons Date Received: N/A <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-07-1414 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 3545 <br /> Method: EPA 8310 <br /> Project: Former Tracy MGP <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 099-07-002-1,081 Solid HPLC 5 07/16/08 07/16/08 080716L10 <br /> Parameter LCS%REC LCSD%REC %REC CL RPD RPD CL Qualifiers <br /> Naphthalene 149 148 40-160 1 0-20 <br /> Acenaphthylene 108 105 40-160 3 0-20 <br /> Acenaphthene 102 99 40-160 3 0-20 <br /> Fluorene 105 105 40-160 0 0-20 <br /> Phenanthrene 106 106 40-160 0 0-20 <br /> Anthracene 101 102 40-160 0 0-20 <br /> Fluoranthene 102 102 40-160 0 0-20 <br /> Pyrene 105 106 40-160 1 0-20 <br /> Benzo(a)Anthracene 105 106 40-160 1 0-20 <br /> Chrysene 107 108 40-160 1 0-20 <br /> Benzo(b)Fluoranthene 106 107 40-160 0 0-20 <br /> Benzo(k)Fluoranthene 109 110 40-160 1 0-20 <br /> Benzo(a)Pyrene 102 103 40-160 1 0-20 <br /> Dibenz(a,h)Anthracene 106 107 40-160 1 0-20 <br /> Benzo(g,h,i)Perylene 108 107 40-160 1 0-20 <br /> Indeno(1,2,3-c,d)Pyrene 103 104 40-160 1 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 />