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I _ <br /> Sequoia 885 Jarvis Dr <br /> Mar n Dill CA 9503 <br /> Analytical (408)776-9600 <br /> I <br /> FAX(408)782-6308 <br /> www. quaialabs.cotn <br /> Stratus Environmental Inc. Project: ARCO!05469,Stockton,CA <br /> 3330 Cameron Park Dr., Suite 550 Project Number: ARCO#5469,Stockton,CA MLL0441 <br /> Cameron Park CA,95682 Project Manama Reported: <br /> j Manager: Jay 7ohnson 01/07/03 12:15 <br /> Volatile Organic Compounds by EPA Method 9260E- Quality y Control <br /> Sequoia Analytical- Morban Hill <br /> I <br /> Analyte Reportin; Spike Source %REC RPD <br /> Result Limit Units Level Result /MC Limits RPD Limit <br /> Notes <br /> � <br /> Batch 2L24008-EPA 5030B P/T <br /> Laboratory Control Sample(2L24008-BSI) <br /> Prepared&Analyzed: 12/24/02 <br /> Methyl tort-bury]ether 9.60 <br /> 0.50 ug/1 10.0 46.0 63-137 <br /> Surrogate:1,1-Dichloroethane-d4 6.01 „ <br /> 5.40 110 78-119 <br /> Laboratory Control Sample Du (2L24008-BSD1) Prepared&Analyzed: 12/24/02 <br /> Methyl tert-bury]ether 9.54 0.50 ttg/1 10.0 <br /> 45.4 63-137 0.627 13 <br /> Surrogate:1,2-Dichloroethane-d4 5.98 „ <br /> 5.00 120 78-119 <br /> i <br /> oia Analytical- Morgan Hill The results in'his report a 1 to the samples analyzed in accordance with the chain of <br /> P PP Y <br /> custody document.Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirely. <br /> Page 19 of 20 <br />