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Sequoia 819 Straker Avenue S 8 <br /> Sacramento CA 95858 34 <br /> (9 16)921-9600 <br /> FAX(9l I O 100 <br /> Analyticalwwwsequciaialalabs nomom <br /> SECOR International-Rancho Cordova Prot-ct ARCO 2093,Tracy,CA <br /> 3017 Kilgore Road Suite 100 Pro3eLl Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/03/01 14 22 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE in Air by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %AEC Limits RPD Limit Notes <br /> Batch 01120263- EPA 5030B(PIT) <br /> Blank(0120263-BLK1) _ Prepared&Analyzed 12/21/00 <br /> Purgeable Hydrocarbons ND 100 mg/ml Air <br /> Benzene ND 00500 " <br /> Toluene ND 00500 " <br /> Ethylbenzene ND 00500 " <br /> Xylenes(total) ND 00500 <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate a a a-Triuorotoluene - 190 200 95 0 60-140 <br /> LCS(0120263-BS1) Prepared&Analyzed 12/21/00 <br /> Benzene 2 01 00500 mg/ml Air 200 l00 70-130 <br /> 0uerte 2 03 0 0500 200 101 70-130 <br /> benzene 2 01 00500 200 100 70-130 <br /> 0ec. <br /> (total) 6 00 00500 600 100 70-130 <br /> Methyl tert-butyl ether 220 0 500 200 110 70-130 <br /> Surrogate a a a-Trifluorotoluene - 1 88 2 00 94 0 60-140 <br /> LCS Dup(0120263-BSDI) Prepared&Analyzed 12/21/00 <br /> Benzene 2 03 0 000 mg/ml Air 2 00 101 70-130 0 990 25 <br /> Toluene 2 06 00500 2 00 103 70-130 1 47 25 <br /> Ethylbenzene 2 OS 00500 2 00 102 70 130 1 97 25 <br /> Xylenes(total) 6 14 00500 600 102 70-130 231 25 <br /> Methyl tert-butyl ether 2 16 0 500 200 108 70-130 l 83 25 <br /> Surrogate a a a Trifluorofoluene 185 200 925 60-140 <br /> tioia Analytical - Sacramento the results in 11ris rcport apply 10 the sumplcs anulyccd to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 5 of 8 <br />