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885 Jarvis Dr <br /> a- ). Sequoia Morgan Hill,CA 95037 <br /> 1 (408)776-9W0 <br /> Analytical FAX(408)782-6308 <br /> www.sequoialabs.com <br /> tatus Environmental Inc. Project: ARCO#5469, Stockton,CA MMA0406 <br /> 0 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469, Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 02/11/03 14:07 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEX by EPA 802113- 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 3A22004-EPA 5030131P/T1 <br /> Blank(3A22004-BLKI) Prepared&Analyzed: 01/22/03 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug/1 <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 9.69 10.0 96.9 55-142 <br /> Laboratory Control Sample(3A22004-BSI) Prepared&Analyzed: 01/22/03 <br /> Benzene 9.67 0.50 ug/1 10.0 96.7 68-140 <br /> Toluene 10.0 0.50 10.0 100 76-127 <br /> Ethylbenzene 10.4 0.50 10.0 104 77-130 <br /> 0ncs(total) 31.6 0.50 30.0 105 78-128 <br /> Surrogate:a,a,a-Trifluorotoluene 10.1 10.0 102 55-141 <br /> Laboratory Control Sample(3A22004-BS2) Prepared&Analyzed: 01/22/03 <br /> Gasoline Range Organics(C6-C10) 278 50 ug/1 250 111 62-134 <br /> Surrogate:a.a,a-Trifluorotoluene 14.4 10.0 144 55-142 S-02 <br /> Matrix Spike(3A22004-MSI) Source: MMA0463-08 Prepared&Analyzed: 01/22/03 <br /> Gasoline Range Organics(C6-C 10) 495 50 ug/l 550 ND 90.0 62-134 <br /> Benzene 1.88 0.50 6.80 ND 27.6 68-140 QM-07 <br /> Toluene 44.3 0.50 41.0 ND 108 76-127 <br /> Ethylbenzene 9.62 0.50 9.80 ND 98.2 77-130 <br /> Xylenes(total) 50.1 0.50 47.9 ND 105 78-128 <br /> Surrogate:a,a,a-Trifluorotoluene 20.7 10.0 207 55-141 QM-07 <br /> Matrix Spike Dup(3A22004-MSD1) Source:MMA0463-08 Prepared&Analyzed: 01/22/03 <br /> Gasoline Range Organics(C6-C10) 511 50 ug/1 550 ND 92.9 62-134 3.18 41 <br /> Benzene 9.44 0.50 6.80 ND 139 68-140 134 30 QM-07 <br /> Toluene 45.8 0.50 41.0 ND 111 76-127 3.33 30 <br /> uola Analytical -Morgan)--Illi 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 /> 19 of 34 <br />