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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> I (916)921-9600 <br /> FAX(916)921 <br /> Analytical www sequoquo0100 <br /> ialalabs com <br /> SECOR International-Rancho Cordova Project Arco 4932, Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/23/01 16 02 <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 %REC Limits RPD Limit Notes <br /> (Batch 1020188- EPA 5030B(PIT) ^ <br /> Blank(1020188-BLK1) Prepared&Analyzed 02/15/01 <br /> urgeable Hydrocarbons ND 100 mg/ml Air <br /> enzene ND 00500 <br /> Toluene ND 00500 " <br /> Ethylbenzene ND 00500 " <br /> ylenes(total) ND 00500 <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate aaa Trifluorotoluene 184 �" 200 920 60-140 <br /> L:S(1020188-BSI) Prepared&Analyzed 02/15/01 <br /> Benzene 1 72 0 0500 mg/m3 Air 200 86 0 70-130 <br /> TWZ) <br /> l1 78 00500 200 890 70-130 <br /> 182 00500 200 91 0 70-130 <br /> 562 00500 600 937 70-130 <br /> Methyl tert-butyl ether 1 66 0 500 200 83 0 70-130 <br /> urrogale a a a-Tri luorololuene 1 78 200 890 60-140 <br /> LCS Dup(10.201_8_8_-BSD1) Prepared&Analyzed 02/15/01 _ <br /> enzene 180 00500 mg/m'Air 200 900 70-130 455 25 <br /> oluene 186 00500 200 93 0 70-130 440 25 <br /> Ethylbenzene l 92 00500 200 960 70-130 5 35 25 <br /> Xylenes(total) $90 00500 600 983 70-130 4 86 25 <br /> ethyl ten-butyl ether 1 68 0 500 200 84 0 70-130 1 20 25 <br /> Surrogate a a a-Trifluorololuene 186 200 93 0 60-140 <br /> I <br /> 1 <br /> 1 <br /> la 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 4 of 6 <br />