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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> {* FAX(916)921-0100 <br /> Analytical www.sequoialabs.com <br /> C�% <br /> Delta Environmental Consultants(Cameron Park) Project: Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number: ARCO 6100,Tracy,CA Reported: r <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 11/19/01 14:48 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> lReporting Spike Source °/oREC RPD <br /> Analyte Result Limit Units level Result %REC Limits RPD Limit Notes <br /> Batch 1110095-EPA 5030E(P/T) <br /> Blank(1110095-BLKI) Prepared&Analyzed: 11/07/01 <br /> Purgeable Hydrocarbons NO 50 ug/l <br /> Benzene NO 0.50 <br /> Toluene ND 0.50 " <br /> II Ethylbenzene NO 0.50 " <br /> t Xylenes(total) NO 0.50 <br /> Surrogate:a,a,a-Trifluorotoluene 9.92 10.0 99.2 60-140. <br /> LCS(1110095-BS1) Prepared&Analyzed: 11/07/01 <br /> Benzene 9.84 0.50 ugll 10.0 98.4 70-130 '• <br /> Toluene 9.59 0.50 10.0 95.9 70-130 <br /> Ethylbnzene 9.74 0.50 10.0 97.4' 70-130 <br /> C;--ne-,(total) 29.2 0.50 30.0 97.3 70-130 - <br /> Surrogate:a,a,a-Triy?uorotoluene 10.3 10.0 103 60-140 <br /> Matrix Spike(1110095-MS1) Source: S111076-03 Prepared&Analyzed: 11/07/01 <br /> Benzene 12.8 0.50 ug/l 10.0 4.7 81.0 60-140 I <br /> ` Toluene 9.28 0.50 10.0 NO 92.8 60-140 l <br /> F Ethylbenzene 9.47 0.50 10.0 NO 94.7 60-140 <br /> I <br /> I Xylenes(total) - _ _ 28.9 0.50- 30.0 NO 96.3 60-140 <br /> Surrogate:a,a,o-Trifluorotoluene 9.39 10.0 93.9 60-140 <br /> Matrix Spike Dup(1110095-MSDI) _ Source: S111076-03 Prepared&Analyzed: 11/07/01 <br /> Benzene 13.6 0.50 ugA 10.0 4.7 89.0 60-140 6.06 25 <br /> Toluene 9.90 0.50 10.0 ND 99.0 60-140 6.47 25 <br /> Ethylbenzene 10.2 0.50 10.0 ND 102 60-140 7.42 25 <br /> Xylenes(total) 30.7 0.5.0 30.0 NO 102 60-140 6.04 25 <br /> Surrogate:a,a,a-Tri luorotoluene -� 9.70 10.0 97.0 60-140 <br /> !quoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety <br /> r <br /> Page 4 of 7 <br />