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885 Jarvis Dr <br /> Sequoia McrginHill,CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.sequoialabs.can <br /> RS Corporation[I] Project: ARCO#548,Stockton,Ca ML74507 <br /> 2874 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#548,Stockton,CA Reported: <br /> Sacramento CA,95$33 Project Manager. Vent Elarth l]122102 15:39 <br /> Total Purgeable Hydrocarbons (C6-C10)by EPA 8015B modified, BTEXM by EPA 8021B - Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2J18003-EPA 5030E {P/TI <br /> Matrix Spike Dup(2J18003-MSD1) Source:MLJ0111-02 Prepared&Analyzed: 10/18/02 <br /> Toluene 43.4 0.50 mg/ml Air 39.7 ND 109 68-121 5.69 29 <br /> Etbylbenzene 10.0 0.50 9.20 ND 109 75-125 4.08 32 <br /> Xylenes(total) 48.2 0.50 46.1 ND 104 76-121 4.45 29 <br /> Surrogate:a,a,a-Triuorotoluene 11.9 10.0 119 56-134 <br /> • <br /> Sequoia 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 /> 7 of 8 <br />