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444 N Wiget tAne <br /> ® <br /> Sequoia <br /> Walnut C925reek CA <br /> J4. ( )988-9600-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequoiaiabs corn <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> -Dublin CA,94568_ _ = Project_Manager Scott Polston —_ _ 04-Oct-00 08 08 <br /> _ <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX in Air by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Linut [huts Level Result %REC Limits RPD Lutut Nates <br /> Batch 0129004-EPA 5030B[PIT] <br /> Blank(0129004-BLK1) Prepared&Analyzed 29-Sep-00 <br /> Purgeable Hydrocarbons ND 2 0 mg/m3 Air <br /> Benzene ND 0 010 " <br /> Toluene ND 0 010 " <br /> Ethylbenzene ND 0 010 " <br /> Xylenes(total) ND 0 010 " <br /> Surrogate as a-Tnfluorotoluene 550 6 00 91 7 70.130 <br /> Blank(0129004-BLK2) Prepared&Analyzed 30-Sep-00 <br /> Purgeable Hydrocarbons ND 20 mglm3 Air <br /> Benzene ND 0 010 " <br /> Toluene ND 0 010 " <br /> Ethylbenzene ND 0 010 <br /> Xylenes(total) ND 0 010 <br /> Surrogate a a4 a-Tnfluorotoluene S30 " 600 883 70-130 <br /> LCS(0129004-BSI) Prepared&Analyzed 29-Sep-00 <br /> Benzene 173 0 010 mglm3 Air 2 00 865 65-120 <br /> Toluene 173 0 010 2 00 86 5 65-120 <br /> Ethylbenzene 168 0 010 2 00 840 65-120 <br /> Xylenes(total) 506 0 010 600 843 65-I20 <br /> Surrogate a q a-Tnfluorotoluene 454 600 757 70-130 <br /> LCS(0129004-BS2) Prepared&Analyzed 30-Sep-00 <br /> Benzene 356 0 010 mg/ml Air 400 89 0 65-120 <br /> Toluene 362 0 010 4 00 905 65-120 <br /> Ethylbenzene 366 0 Oto 4 00 915 65420 <br /> Xylenes(total) 10 6 0 010 120 883 65-120 <br /> Surrogate a;a a-Tri luorotoluene 554 6 00 923 70-130 <br /> Sequoia Analytical-Walnut Creels The results to this report apply to the samples analyzed in accordance with the chat <br /> custody document This analytical report must be reproduced in its enti <br /> € Page 6 of 8 <br /> E <br /> 1 � <br />