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Sequoia 819 Straker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Prof Tosco 1205,Lathrop,CA <br /> 3017 Ktlgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Protect NemB— Rusty Benkosky 04/10/02 18 00 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFr-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> byte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2040101-EPA 5030B(P/T) <br /> Blank 2040101 BLKIPrepared&Analyzed 04/04/02 <br /> Purgeable Hydrocarbons ND SO ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a,a,a-Tris luorotoluene 951 100 951 60-140 <br /> LCS 2040101-BSlPrepared&Analyzed 04/04/02 <br /> Benzene 774 050 119/1 to 0 774 70-130 <br /> Toluene 8 72 0 50 100 87 2 70-130 <br /> Ethylbenzene 9 82 050 100 982 70-130 <br /> Xylenes(total) 287 0 50 300 95 7 70-130 <br /> ethyl tert-butyl ether 113 2 5 " 10 0 113 70-130 <br /> Surrogate a a a-Tr fluorotoluene 102 100 102 60-140 <br /> LCS Dup(2040101-BSD1) Prepared&Analyzed 04/04/02 <br /> Benzene 8 30 0 50 USA 100 83 0 70-130 6 98 25 <br /> Toluene 930 050 100 930 70-130 6 44 25 <br /> Ethylbenzene 104 050 100 104 70-130 5 74 25 <br /> Xylenes(total) 305 0 50 300 102 70-130 609 25 <br /> Methyl tart-butyl ether 105 2 5 10 0 105 70-130 734 25 <br /> Surrogate a,a,a-Trifluorotoluene 112 100 112 60-140 <br /> Batch 2040103-EPA 5030B P <br /> Blank 2040103-BLKIPrepared&Anal 04/05/02 <br /> Purgeable Hydrocarbons ND 50 ug4 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 5 " <br /> Surrogate a,a a-Trlfluorotoluene 114 100 114 60-140 <br /> equoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must he reproduced in its entirety <br /> Page Page 9 of 14 <br />