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885 Jarvis Dr <br /> (D-i Sequoia Magan Hill,CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.sequoialabs.w n <br /> tratus Envirorunental Inc. Project: ARCO#5469,Stockton,CA MLK0749 <br /> 3D Cameron Park Dr.,Suite SSU Project Number: ARCO X5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 12/19/02 08:44 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015E modified, BTEX by EPA 802113 - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %RPC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Nates <br /> Batch 2K26004-EPA 5030B [P/T] <br /> r,Iatrix Spike Dup(2K26004-MSD1) Source: MLK0482-06 Prepared: 11/26/02 Analyzed: 11/27/02 <br /> Gasoline Range Organics(C6-C10) 1.04 0.50 mglkg 1.10 0.56 43.6 63-143 2.93 21 QM-07 <br /> Benzene 0.0199 0.0050 " 0.0132 ND 151 72-135 6.22 35 QM-07 <br /> Toluene 0.0989 0.0050 0.0794 ND 125 67-141 5.61 18 <br /> Ethylbenzene 0.0209 0.0050 " 0.0184 ND 114 68-147 6.42 20 <br /> Xylenes(total) 0.115 0.010 0.0922 ND 125 62-149 5.36 20 <br /> Surrogafe:a,a,a-Trifluorotoluene 0.0257 0.0200 128 64-145 <br /> Surrogate:4-Bromofluoroberzene 0.0170 110.0200 85.0 41-173 <br /> Batch 2LO2001 -EPA 5030B [P/TI <br /> Blank(2L02001-BLKI) Prepared&Analyzed: 12/02/02 <br /> Gasoline Range Organics(C6-C10) ND 0.50 mg/kg <br /> frne ND 0.0050 <br /> ne Nle 00050 <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) ND 0.010 <br /> Surrogate:a,a,a-Tr.fluorotoluene 0.0234 " 0.0100 117 64-145 <br /> Surrogate:4-Brornofluorobenzene 0.0272 0.0200 136 41-173 <br /> Laboratory Control Sample(2L02001-BS1) _ Prepared_&Analyzed: 12/02/02 <br /> Benzene 0.0242 0.0050 ^mg/kg ^0.0200 yY� 121 72-135 -- <br /> Toluene 0.0234 0.0050 " 0.0200 117 67-141 <br /> Ethylbenzene 0.0242 0.0050 0.0200 121 68-147 <br /> Xylenes(total) 0.0726 0.010 " 0.0600 121 62-149 <br /> Surrogale:a,o,a-Trifluorotoluene 0.0214 110.0200 107 64-145 <br /> Surrogate:4-Bromofluorobenzene 0.0310 0.0200 155 41-173 <br /> S is Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 6 of 9 <br />