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Pace Analytical Services, Inc <br /> aceAnalXical Houston, <br /> T Avenue <br /> ousttonon,, TX 77058 <br /> Phone 281 488 1810 <br /> WWW pacela6s cam QUALITY CONTROL DATA Fax 281488 4561 <br /> Lab Project Number 8519402 <br /> Client Project ID BP Site# 11192 <br /> QC Batch 48123 QC Batch Method See analytical meth <br /> Analysis Method EPA 8021 Analysis Description SW8021 Aromatics Water <br /> Associated Lab Samples 851673210 851673211 <br /> METHOD BLANK 851673872 <br /> Associated Lab Samples <br /> 851673210 851673211 <br /> Method <br /> Blank <br /> Parameter Units Result PRL Footnotes <br /> Benzene ug/l ND 0 5 <br /> Ethylbenzene ug/l ND 0 5 <br /> Toluene ug/l ND 0 5 <br /> Xylene (Total) ug/l ND 0 5 <br /> Methyl tert butyl ether ug/l ND 0 5 <br /> 1 4 Difluorobenzene (S) X 98 <br /> 4 Bromofluorobenzene (S) X 81 <br /> MATRIX SPIKE & MATRIX SPIKE DUPLICATE 851673874 851673875 Matrix Matrix Spike <br /> Spike Spike Spike Sp Dup Dup <br /> Parameter Units 851673213 Conc Result % Rec Result X Rec RPD Footnotes <br /> Benzene ug/l 0 1158 50 00 47 26 94 47 23 94 0 <br /> Ethylbenzene ug/1 0 50 00 45 13 90 45 43 91 1 <br /> Toluene ug/1 0 1294 50 00 44 95 90 44 66 89 1 <br /> Xylene (Total) ug/1 0 150 00 131 6 88 130 3 87 1 <br /> Methyl-tert butyl ether ug/l 0 50 00 47 94 96 47 77 96 0 <br /> 1 4 Difluorobenzene (S) 101 100 <br /> 4-Bromofluorobenzene (S) 92 95 <br /> LABORATORY CONTROL SAMPLE 851673873 <br /> Spike LCS Spike <br /> Parameter Units Conc Result % Rec Footnotes <br /> Benzene ug/l 50 50 36 101 <br /> Ethylbenzene ug/l 50 50 29 101 <br /> Toluene ug/l 50 49 77 100 <br /> Xylene (Total) ug/l 100 99 98 100 <br /> Date 01/25/01 <br /> Page 10 <br /> REPORT OF LABORATORY ANALYSIS <br /> This report shall not be reproduced, except in full, <br /> without the written consent of Pace Analytical Services, Inc <br />