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Sequoia Moron <br /> Jarvis Dr <br /> Moron Hill,CA 95037 <br /> WIQF Analytical (408)776-9600 <br /> FAX(408)782-6308 <br /> www.sc quoialabs.can <br /> #30 <br /> ratus Environmental Inc. Project: ARCO#5469,Stockton,CA <br /> Cameron Park Dr.,Suite 550 MLK0749 <br /> Project Number: ARCO#5469,Stockton,CA Reported: <br /> meron Park CA, 95682 Project Manager: Jay Johnson 12/19/02 08:44 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEX by EPA 8021B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Anal eReporting spike Source %REC RPD <br /> Result Limit units Level Result %RFC Limits RPD Limit Notes <br /> Batch 2K26004 -EPA 5030E [P/Tl <br /> Blank(2K26004-BLKi) Prepared&Analyzed: 11/26/02 <br /> Gasoline Range Organics(C6-C10) ND 0.50 mg/kg <br /> Benzene ND 0.0050 " <br /> Toluene ND 0.0050 " <br /> Ethylbenzene ND 0.0050 <br /> Xylenes(total) ND 0.010 " <br /> Surrogate:a,a,a-7rit7uorotoluene 0.0147 0.0200 73.5 64-145 <br /> Surrogate:4-Bromofluorobenzene 0.0123 0.0200 61.5 41-173 <br /> Laboratory Control Sample(2K26004-SSI) Prepared&Analyzed: 11/26/02 <br /> Benzene 0.0187 0.0050 mg/kg 0.0200 93.5 72-135 <br /> Toluene 0.0189 0.0050 " <br /> 0.0200 94.5 67-141 <br /> benzene 0.0182 0.0050 „ 0.0200 91.0 68-147 <br /> es{total) 0.0585 0.010 0.0600 97.5 62-149 <br /> Surrogate:a,a,a-Trit7uorotoluene 0.0175 0.0200 87.5 64-145 <br /> Surrogate:4-Bromo,Jluorobenzene 0.0119 0.0200 64.5 41-173 <br /> Laboratory Control Sample(ZK26004-BS2) Prepared&Analyzed: 11/26/02 <br /> Gasoline Range Organics(C6-C10) 1.09 0.50 mg/kg 1.00 109 63-143 <br /> Surrogate:a,a,a-Triuorotoluene 0.0217 0.0100 108 64-145 <br /> Surrogate:4-Bromofluorobenxene 0.0150 0.0200 75.0 41-173 <br /> Matrix Spike(2K26004-MSI) Source:MLK0482-06 Prepared: 11/26/02 Analyzed: 11/27/02 <br /> Gasoline Range Organics(C6-C10) 1.01 0.50 mg/kg 1.10 0.56 40.9 63-143 <br /> QM-07 <br /> Benzene 0.0187 0,0050 0.0132 ND 142 72-135 <br /> TolueneQM 07 <br /> 0.0935 0.0050 0.0794 ND ]1 g 67-141 <br /> Ethylbenzene. 0.0196 0.0050 0.0184 ND 107 68-147 <br /> Xylenes(total) 0.109 0.010 0.0922 ND 118 62-149 <br /> Surrogate:a,a,a-Trlfluorotoluene 0.0258 0.0100 129 64-145 <br /> Surrogate:4-Bromofluorobenzene 0.0162 0.0100 81.0 41-173 <br /> 5ia Analytical-Morgan Hill The results in this report apply to the san2ple3 analyzed in accordance with the chain of <br /> custody document. Unless otherwise stared,results are reported on a wel weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 5 of 9 <br />