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' 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> r Analytical www <br /> 0 10 <br /> sequequotaiaalabs 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 03/01/01 15 24 <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 1020194- EPA 5030B(PIT) <br /> Blank(102_0194-BL_K1) _ Prepared&Analyzed 02/16/01 <br /> ,Purgeable Hydrocarbons ND 10 0 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 /> furrogate a a a-Trifluorotoluene 206 200 103 60-140 <br /> CS(10_2_0_194-BSI) _ — Prepared&Analyzed 02/16/01 <br /> Benzene 2 16 00500 mg/m'Air 200 108 70-130 <br /> 'Toluene 228 00500 j 2 00 114 70-130 <br /> enzene 238 00500 2 00 t 19 70-130 <br /> h es(total) 622 00500 600 104 70-130 <br /> Methyl tent-butyl ether 2 04 0 500 200 102 70-130 <br /> 'Surrogate a a a-Triuorotoluene 218 200 109 60-140 <br /> LCS D (1020194-BSDI) _ _ Prepared&Analyzed 02/16/01 <br /> ,Benzene 206 00500 mg/m'Air 200 103 70-130 4 74 25 <br /> Toluene 2 18 00500 2 00 109 70-130 448 25 <br /> Ethylbenzene 226 00500 2 00 113 70 130 5 17 25 <br /> Xylenes(total) 596 00500 600 993 70-130 427 25 <br /> ,Methyl tert-butyl ether l 84 0 500 "W� 200 920 70-130 10 3 25 <br /> Surrogate a a a-Trruorotoluene 228 2 00 114 60-140 <br /> oia Analytical-Sacramento The results rn this report apply to the samples analyzed to accordance with the chain of <br /> ' custody document This analytical report must be reproduced in its entirety <br /> ' Page 4 of 6 <br />