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I <br /> Sequoia 819 Striker Avenue,Suiie 8 ! <br /> Sacramento,CA 95834 <br /> Analytical (916)921-9640 <br /> FAX91 <br /> { 6)921-0100 <br /> wwwsequoialabs.aom <br /> i <br /> Delta Environmental Consultants(Cameron Park) Prajeot: Arco 6100,Tracy,CA ' <br /> 3330 Cameron Park Dr.Ste 550 Project Number, N/A Reported: <br /> Cameron Park CA,95682 Project Manager. Jay Johnson <br /> 09/21/01 15:50 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LTJFT-Quality Control I <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC APD <br /> Analyse Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> j. <br /> Batch 1090139-EPA 5030B(MeOH) <br /> Blank 1090139-BLK1) <br /> Prepared&Anal ed:09/13/01 <br /> t Purgeable Hydrocarbons ND 5.0 mg/kg <br /> Benzene ND 0.025 I <br /> Toluene ND 0.025 <br /> Ethylbenzene ND 0.025 <br /> Xylenes(total) ND 0.025 " <br /> ` Surrogate:a,a,a-Trifluorolohiene 1.17 1.60 117 60-140 <br /> LCS(1090139-BSI) <br /> Prepared&Analyzed:09/13/01 f 1 <br /> Benzene 1.03 0.025 mg/kg 1.00 103 74-130 l <br /> Toluene 1.04 0.025 1.00 104 70-130 <br /> Ethylbenzene 0.993 0.025 1.00 99,3 70-130 <br /> y <br /> i Xylenes(total) 2.79 0.025 3.00 93.0 70-130 f <br /> Surrogate:a,a,a-Trifluorotoluene 1.21 1.00 121 64-140 <br /> f <br /> Matrix S ike{1090139-MSI) Source:5109118-14 Prepared&Analyzed:09/13/01 <br /> Benzene <br /> 0.849 0.025 mg/kg 1.00 ND 84.4 60-140 <br /> Toluene 0.858 0.025 1.00 ND 85.8 60-140 w <br /> Ethylbenzene „ <br /> Y 0.820 0.025 � 1.00 ND 82.0 60-140 <br /> Xylenes(total) 2.31 0.025 3.00 ND 77.0 60-140 <br /> Surrogate:a,a,a-Trifluorotoluene 1.09 1.00 109 60-140 <br /> Matrix Spike Du 1090139-MSD1) Source:S1091I8-14 Prepared&Analyzed:09/13/01 <br /> Benzene 0.882 0.025 mg/kg 1 00 ND "- 88.2 60-140 3.81 25 <br /> Toluene 0.890 0.025 1,00 ND 89.0 60-140 3.66 25 <br /> Ethylbenzene 0.847 0,025 1.00 ND 84.7 60-140 3,24 25 <br /> Xylenes(total) 2.39 0,025 3.00 ND 79.7 60-140 3.40 25 a <br /> i <br /> Surrogate:a,a,a-Trifluorotaluene 1.14 1.00 114 60-140 � 1 <br /> i I <br /> w <br /> i I <br /> 1 <br /> f i <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> Ir <br /> f <br /> Page Page 18 of'24 } <br /> s <br /> i <br /> i <br />