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Sequoia 8f9 StAvenue,Suite 8 <br /> } 1 Sacramento, CA 95834 <br /> ® (916)921-%00 <br /> FAX(916)921-0100 <br /> Analytical www.sequolalabs.com <br /> ta Environmental Consultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> IDel <br /> 330 Cameron Park Dr. Project Number: NIA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 04/04/01 I7:07 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT- Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike source %REC RPD <br /> Analyte Result Limit Units Level Result %R$C Limits RPD Limit No, <br /> Batch 1030392-EPA 50308 (PIT) <br /> Blank(1030392-BLKI) _ Prepared&Analyzed:03/26/01 <br /> Purgeable Hydrocarbons ND 50.0 qg/1 <br /> Benzene ND 0.500 " <br /> Toluene ND 0,500 " <br /> Ethylbenzene ND 0.500 " <br /> Xylenes(total) ND 0.500 " <br /> Surrogate_a,a,a-Trifluorotoluene 9.76 10.0 97.6 60-140 <br /> LCS(1030392-BSI) Prepared&Analyzed:03/26/01 <br /> Benzene 10.0 0.500 ug/l 10.0 100 70-130 <br /> Toluene 10.1 0,500 10.4 101 70-130 <br /> Ethylbenzene 10.2 0.500 10.0 102 70-130 <br /> "glbxylenes(total) 31.4 0.500 " 30.0 105 70-130 <br /> rrogate:a,a,a-Trifluorotoluene 9.63 10.0 96.3 60-140 <br /> Matrix Spike(1030392-MSI) _ Source: 5103391-03 Prepared&Analyzed: 03/26/01 <br /> Benzene JOS 0.500 ug/I 10.0 ND 105 60-140 <br /> Toluene 10.5 0.500 10.0 ND 105 60-140 <br /> Ethylbenzene 10.6 0.500 " 10.0 ND 106 60-140 <br /> Xylenes(total) 32.4 0.500 30.0 ND 108 60-140 <br /> Surrogate:a,a,a-Triuorotoluene 9.65 10.0 96.5 60-140 <br /> Matrix Spike Dup(1030392-MSDI) Source: S103391-05 Prepared&Analyzed: 03/26/01 <br /> Benzene 10.4 0.500 ug/l 10.0 ND 104 60-140 0.957 25 <br /> Toluene 10.4 0.500 10.0 ND 104 60-140 0.957 25 <br /> Ethylbenzene 10.5 0.500 10.0 ND 105 60-140 0.948 25 <br /> Xylenes(total) 32.0 0.500 30.0 ND 107 60-140 1.24 25 <br /> Surrogate:a,a,a-Trt(7uorotoluene 9.58 10.0 95.8 60-140 <br /> �equoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> mastody document. This analytical report must be reproduced in its entirety. <br /> Page 9 of 12 <br />