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Pace Analytical Services, Inc <br /> 90D Gemini Avenue <br /> -alce Af 1alj4ica T" Houston TX 77058 <br /> —� ��.rr QUALITY CONTROL DATA Phone 281 488 1810 <br /> Fax 281 488 4661 <br /> Lab Project Number 8520861 <br /> Client Project ID BP Site# 11192 <br /> QC Batch 51470 QC Batch Method See analytical meth <br /> Analysis Method EPA 8021 Analysis Description SW8021 Aromatics Water <br /> Associated Lab Samples 851686779 851686780 851686781 851686782 851686783 <br /> METHOD BLANK 851687273 <br /> Associated Lab Samples <br /> 851686779 851686780 851686781 8516B6782 851686783 <br /> Method <br /> Blank <br /> Parameter Units Result PRL Footnotes <br /> Benzene ug/l ND 0 5 <br /> Ethylbenzene ug/1 NO 0 5 <br /> Toluene ug/l ND 0 5 <br /> Xylene (Total) ug/l NO 1 5 <br /> Methyl tert butyl ether ug/l ND 0 5 <br /> 1 4 Dif I uorobenzene (S) X 99 <br /> 4 Bromofluorobenzene (S) X 93 <br /> MATRIX SPIKE & MATRIX SPIKE DUPLICATE 851667275 851687276 Matrix Matrix Spike <br /> Spike Spike Spike Sp Dup Dup <br /> Parameter Units 851686779 Conc Result % Rec Result % Rec RPD Footnotes <br /> Benzene ug/1 0 50 00 61 41 123 60 15 120 2 <br /> Ethylbenzene ug/l 0 50 00 62 86 126 61 45 123 2 <br /> Toluene ug/l 0 1021 50 00 61 54 123 60 12 120 2 <br /> Xylene (Total) ug/l 0 2241 100 00 126 3 126 123 B 124 2 <br /> Methyl tert butyl ether ug/1 157 0 50 00 204 4 95 206 9 100 1 <br /> 1 4 Difluorobenzene (S) 100 100 <br /> 4-BromofIuorobenzene (S) 106 105 <br /> LABORATORY CONTROL SAMPLE 851687274 <br /> Spike LCS Spike <br /> Parameter Units Conc Result % Rec Footnotes <br /> Benzene ug/l 50 52 96 106 <br /> Ethylbenzene ug/l 50 54 03 108 <br /> Toluene ug/l 50 53 10 106 <br /> Xylene (Total) ug/l 100 108 9 109 <br /> Date 04/20/01 Page 7 <br /> RREPODIRT OF LABORATORY MALY= <br /> This report shall not be reproduced except in full, <br /> without the written consent of Pace Analytical Services inc <br />