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Versar--Fair Oaks Project CANG <br /> 7844 Madison Ave#167 Project Number 104700 4766 023 Reported <br /> Fair Oaks CA,95628 Project Manager Larry Memecke 02/12/04 15 56 <br /> Volatile Organic Compounds by EPA Methods 8021BI8015M - Quality Control <br /> SunStar Laboratories,Inc. <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4020508-EPA 5030 Water GC <br /> Blank(4020508-BLKI) Prepared&Analyzed 02/05/04 <br /> Benzene ND 10 ug11 <br /> Toluene ND 1 0 " <br /> Ethylbenzene ND 10 " <br /> m p Xylene ND 20 " <br /> o Xylene ND 10 " <br /> Surrogate 4-Bromofluorobenzene 519 500 104 65-135 <br /> LCS(4020508-BS1) Prepared&Analyzed 02/05/04 <br /> Benzene 722 1 0 ug/l 73 0 98 9 70-130 <br /> Toluene 424 1 0 406 104 70-130 <br /> Ethylbenzene 101 10 940 107 70-130 <br /> in p-Xylene 364 20 339 107 70-130 <br /> o-Xylene 137 10 134 102 70-130 <br /> *Surrogate 4-Bromofluorobenzene 489 500 978 65-135 <br /> Matrix Sprke(4020508-MSI) Source_ T400094-21 Prepared&Analyzed 02/05/04 <br /> Benzene 75 4 1 0 ug/l 73 0 ND 103 70-130 <br /> Toluene 408 1 0 406 ND 100 70-130 <br /> Ethylbenzene 99 4 1 0 94 0 ND 106 70-130 <br /> in p-Xylene 361 20 339 ND 106 70-130 <br /> o-Xylene 141 10 134 ND 105 70-130 <br /> Surrogate 4-Bromofluorobenzene 492 500 98 4 65-135 <br /> Matrix Spike Dup(4020.508-MSDI) Source T400094-21 _ Prepared&Analyzed 02/05/04 <br /> Benzene 73 7 10 ug/l 73 0 ND 101 70-130 2 28 20 <br /> Toluene 419 10 406 ND 103 70-130 2 66 20 <br /> Ethylbenzene 98 1 1 0 94 0 ND 104 70-130 1 32 20 <br /> in p-Xylene 356 2 0 339 ND 105 70 130 1 39 20 <br /> o-Xylene 137 1 0 134 ND 102 70-130 2 88 20 <br /> Surrogate 4-Bromofluorobenzene 52 7 500 105 65-135 <br /> 0SunSta. —aboratorles,Inc The results in this report apply to the samples analyzed in accordance with the <br /> chain afcustody document This analytical report must be reproduced in its <br /> entirety <br /> Ben Beauchaine,Laboratory Supervisor Page 26 of 30 <br />