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. Pace Analytical Services, inc <br /> ace Analytical'm 900 Gemini Avenue <br /> Houston, l'X 77058 <br /> wwwpacelabs.com QUALITY CONTROL DATA Phone 2814881810 <br /> Fax 281488 4661 <br /> Lab Project Number 8522619 <br /> Client Project ID BP Site# 11194 <br /> QC Batch 56547 Analysis Method EPA 8021 <br /> QC Batch Method See analytical meth Analysis Description SW8021 Aromatics Water <br /> Associated Lab Samples 851705011 851705012 851705013 851705014 851705015 <br /> 851705016 851705017 851705018 851705019 851705020 <br /> 851705021 851705022 851705023 851705024 <br /> METHOD BLANK 851706004 <br /> Associated Lab Samples 851705011 851705012 851705013 851705014 851705015 85170501.6 851705017 <br /> 851705018 651705019 851705020 851705021 851705022 851705023 851705024 <br /> Blank Reporting <br /> Parameter Units Result Limit Footnotes <br /> Benzene ug/l NO 0 500 <br /> Ethylbenzene ug/l ND 0 500 <br /> Toluene ug/l ND 0 500 <br /> Xylene (Total) ug/l ND 1 50 <br /> Methyl-tert butyl ether ug/l ND 0 500 <br /> 1 4 Difluorobenzene (S) % 98 <br /> 4 Bromofluorobenzene (S) % 102 <br /> LABORATORY CONTROL SAMPLE 851706005 <br /> I <br /> Spike LCS LCS <br /> Parameter Units Conc Result % Rec Footnotes <br /> Benzene ug/l 50 53 12 106 <br /> Ethylbenzene ug/l 50 54 44 109 <br /> Toluene ug/l 50 52 91 106 <br /> Xylene (Total) ug/l 100 109 1 109 <br /> Methyl-tert butyl ether ug/l 50 55 71 111 <br /> 1 4-Difluorobenzene (S) 102 <br /> 4-Bromofluorobenzene (S) 103 <br /> MATRIX SPIKE & MATRIX SPIKE DUPLICATE 651706241 851706242 <br /> 851705012 Spike MS MSD MS MSD <br /> Parameter Units Result Conc Result Result % Rec X Rec RPD Footnotes <br /> Benzene ug/l 0 1467 50 00 49 73 49 30 99 98 1 <br /> Date 08/13/01 <br /> Page 16 <br /> i <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 />