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Sequoia $l9 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(916)921-0 100 <br /> Analytical www sequoialabs corn <br /> SECOR International-Rancho Cordova Project Arco 4932,Stockton,CA <br /> 3017 Kilgore Road Suite 100 Project Number N/A Reported <br /> ' Rancho Cordova CA,95670 Project Manager Rusty Benkosky 03/01/01 15 42 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE In Air by DHS LUFT - Quality Control <br /> ' Sequoia Analytical - Sacramento <br /> Reponmg Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> 'Batch 1020194- EPA 5030B(P/T) <br /> Blank(1020194-BLKI)_ _ Prepared&Analyzed 02/16/01 <br /> Purgeable Hydrocarbons ND 100 mg/ml Air <br /> i <br /> Benzene ND 00500 " <br /> Toluene ND 00500 " <br /> Ethylbenzene ND 00500 <br /> 'Xylenes(total) ND 00500 i <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate a a a-Trifluorotoluene 206 '� 2 00 103 60-140 <br /> LCS(1020194-BSI) _ __ Prepared&Analyzed 02/16/01 _ <br /> Benzene 2 16 00500 mg/ml Air 2 00 108 70-130 <br /> 'Toluene 228 00500 " 2 00 114 70-130 <br /> 238 00500 200 119 70-130 <br /> *nzene <br /> otal) 622 00500 600 104 70-130 <br /> Methyl tert-butyl ether 2 04 0 500 2 00 102 70-130 <br /> Ii.-I'logole a a a-Trrfluorotoluene 2 18 2 00 109 60-140 <br /> LCS Dup(1020194_BSD1) _ Prepared&Analyzed 02/16/01 _ <br /> FBenzene 206 00500 mg/ml Air 200 103 70-130 4 74 25 <br /> Toluene 2 18 00500 2 00 109 70-130 448 25 <br /> Sthylbenzene 226 00500 200 113 70-130 5 17 25 <br /> Xylenes(total) 596 00500 600 993 70-130 427 25 <br /> Methyl ten-butyl ether t 84 0 500 2 00 92 0 70-130 10 3 25 <br /> Surrogate a a a-1riuorotoluene 228 W 200 114 60-140 <br /> to Analytical-Sacramento The results m/hes report apply 10 the samples analyzed in accordance mth the churn of <br /> custody document Thrs analytrcal report must be reproduced fn its enlrrery <br /> ' ( Page 4 of 6 <br /> `h yc <br />