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885 Jarvis Dr <br /> ell Sequoia MQgtn Hill,CA 95037 <br /> TAW Analytical FAX(408)782-6308 <br /> www.xquoialabs.com <br /> atus Environmental Inc. Project: ARCO#5469,Stockton,CA MMA0406 <br /> 30 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 8021B - Quality Control <br /> Sequoia Analytical - Morgan Mill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3A28002- EPA 5030B IP/TJ <br /> Matrix Spike(3A28002-NISI) Source:MMA0406-03 Prepared&Analyzed:01/28/03 <br /> Surrogate:a,a,a-Trifluarotoluene 9.38 u9/1 10.0 93.8 55.142 <br /> Matrix Spike Dup(3A28002-MSDI) Source:MMA0406-03 Prepared&Analyzed:01/28/03 <br /> Gasoline Range Organics(C6-C 10) 483 50 ug/l 550 ND 87.8 62-134 2.66 41 <br /> Benzene 10.3 0.50 6.80 ND 146 68.140 1.96 30 QM-07 <br /> Toluene 37.3 0.50 41.0 ND 91.0 76-127 3.27 30 <br /> Ethylbenzene 9.65 0.50 9.80 ND 98,5 77-130 2.41 21 Q-23a <br /> Xylenes(total) 46.4 0.50 47.9 ND 96.9 78-128 2.18 21 Q-23 <br /> Surrogate:a,a,a-Trifluorotoluene 10.4 10.0 104 55-142 <br /> ch 3A28003-EPA 5030B JPM <br /> nk(3A28003-BLKI) Prepared&Analyzed: 01/28/03 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug/l <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-Tris luorololuene 9.56 10.0 95.6 55-142 <br /> Laboratory Control Sample(3A28003-BSI) Prepared&Analyzed: 01/28/03 <br /> Benzene 8.93 0.50 ugll 10.0 89.3 68-140 _ �~ <br /> Toluene 8.94 0.50 10.0 89.4 76-127 <br /> Ethylbenzene 9.24 0.50 10.0 92.4 77-130 <br /> Xylenes(total) 27.3 0.50 30.0 91.0 78-128 <br /> Surrogate:a,a,a-Trifluorotoluene 9.73 10.0 97.3 55-142 <br /> �uoia 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 /> 21 of 34 <br />