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Sequoia 885 Jarvis Dr <br /> I Morgan Bill,CA 95037 <br /> Analytical <br /> (408)776-9600 <br /> FAX(408)782-6308 <br /> www,seyuoialabs.can <br /> tratus Environmental Inc. Project: ARCO 45469, Stockton,CA MLK0837 <br /> '30 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469, Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 12/23/02 10:37 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA S015B modified, BTEX by EPA 8021B- Quality r 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 2LO3002-EPA 5030B [PIT] <br /> Blank(2L03002-BLKI) Prepared&Analyzed: 12/03/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ng/1 <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 <br /> I " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Surrogate:a,a,a-Tr�fluorotoluene 10.9 10.0 109 55-142 <br /> Laboratory Control Sample(ZL03002-BSI) Prepared&Analyzed: 12/03/02 <br /> Benzene 10.5 0.50 ugll IM 105 68-140 <br /> Toluene 10.8 0.50 10.0 108 76-127 <br /> Ethylbenzene 11.6 0.50 10.0 116 77-130 <br /> artat) 33.2 0.50 30.0 11 I 78-12$ <br /> Surrogate;a,a,a-Tr�/luorotoluene 10.8 10.0 108 55-143 <br /> I <br /> Laboratory Control Sample(2L03002-1352) Prepared&Analyzed: 12/03/02 <br /> Gasoline Range Organics(C6-C10) 243 50 ug/I 250 97.2 62-134 <br /> Surrogate:a,a,a-Trfluorotoluene 9.81 10.0 981 55-142 <br /> Laboratory Control Sample Dup(2L03002-BSDI) Prepared: 12/03/02 Analyzed: 12/04/02 <br /> Benzene 8.55 0.50 ugli 10.0 <br /> 85.5 68-140 20.5 30 <br /> Toluene 8.72 0.50 10.0 87.2 76-127 21.3 30 <br /> EthyIbenzene 9.31 0.50 10.0 93.1 77-130 21.9 21 QR-02 <br /> Xylenes(total) 26.8 0,50 30.0 89.3 78-128 21.3 21 QR-02 <br /> Surrogate:a,a,a-Trifluorotoluene 8.03 10.0 80.3 55_142 <br /> Laboratory Control Sample Dup(2L03002-BSD2) Prepared: 12/03/02 Analyzed: 12/04/02 <br /> Gasoline Range Organics(C6-C10) 249 50 ug/1 250 99.6 62-134 2.44 41 <br /> Surrogate:a,a,a-Trouorotoluene 6.89 10.0 68.9 55-142 <br /> Sioia 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 7 of 13 <br />