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85 Jarvis Dr <br /> Se uoia Morgantiā˛¢8 <br /> q CA 95037 <br /> ,; (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.a,quoialabs.can <br /> RS Corporation[1] Project: ARCO#548,Stockton,Ca MLL0882 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#548,Stockton,CA Reported: <br /> Sacramento CA,95833 Project Manager: Vern Elarth 01/10/03 15:47 <br /> Total Purgeable Hydrocarbons,BTEX and MTBE in Air (ppmv) by DHS LT_TFT-Quality Control <br /> Sequoia Analytical -Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3010119-EPA 5030B(PIT) <br /> Blank(3010119-BLKI) Prepared&Analyzed:01/07/03 <br /> Purgeable Hydrocarbons ND 2.8 ppmv <br /> Benzene ND 0.016 " <br /> Toluene ND 0.013 It <br /> Ethylbenzene ND 0.012 <br /> Xylenes(total) ND 0.012 " <br /> Methyl tert-butyl ether ND 0.14 " <br /> Surrogate:a,a,a-Tris luorotoluene 0.329 0.335 98 60-140 <br /> Blank(3010119-BLK2) Prepared&Analyzed:01/08/03 <br /> Purgeable Hydrocarbons ND 2.8 ppmv <br /> Benzene ND 0.016 <br /> Toluene ND 0.013 " <br /> ylbenzene ND 0.012 <br /> ylenes(total) ND 0.012 " <br /> Methyl tert-butyl ether ND 0.14 " <br /> Surrogate:a,a,a-Trifluorotoluene 0.318 0.335 95 60-140 <br /> Laboratory Control Sample(3010119-BS1) Prepared&Analyzed:01/07/03 <br /> Surrogate:a,a,a-Trifluorotoluene 0.354 ppmv 0.335 106 60-140 <br /> Laboratory Control Sample(3010119-BS2) Prepared&Analyzed:01/08/03 <br /> Surrogate:a,a,aā€¢Trifluorotoluene 0.358 ppmv 0.335 107 60-140 <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 />