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Sequoia 819 Sinker Avenue Suite g <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs coin <br /> SECOR Intemational-Rancho Cordova Project ARCO 2093,Tracy CA <br /> 3017 Kilgore Road,Suite 100 Project Number NIA ttcported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 03/30/01 10 36 <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 /> Anatyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1030244-EPA 5030B(PIT) <br /> Blank(1030244-BLK1) Prepared& Analyzed 03/16/01 <br /> Purgeable Hydrocarbons ND 100 mg/m'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-Trifluorotoluene 232 200 116 60-140 <br /> LCS(1030244-BSI) Prepared&Analyzed 03/16/01 <br /> Benzene 1 99 00500 mg/m'Air 200 995 70-130 <br /> W—ne 211 00500 200 105 70-130 <br /> 2 24 00500 200 112 70-130 <br /> Xylenes(total) 5 86 00500 600 97 7 70-130 <br /> Methyl tort-butyl ether 1 88 0 500 200 940 70-130 <br /> Surrogate aaa-Trr/luorololuene 2 44 200 122 60-140 <br /> LCS Dup(1.030244-BSDI) Prepared&Analyzed 03/16/01 <br /> Benzene 2 01 00500 mg/m'Air 200 100 70-130 l 00 25 <br /> Toluene 2 12 00500 200 106 70-130 0 473 25 <br /> Ethylbertzene 224 00500 200 112 70-130 0 25 <br /> Xylenes(total) 5 86 00500 6 00 977 70-130 0 25 <br /> Methyl tert-butyl ether 187 0 500 200 93 5 70-130 0 533 _25 <br /> Surrogale aaa-Tris luorotoluene 124 100 110 60-140 <br /> oia Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> page 5 of 8 <br />