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l { <br /> 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> 4 www sequotalabs com <br /> SECOR International-Rancho Cordova Project ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/10/02 16 29 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit //nits Level Result %REC Limits RPD Limit Notes <br /> Batch 2030286-EPA 5030B(PIT) <br /> Blank 2030286-BLKI) Prepared&Analyzed 03/21/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trrfluorotoluene 9 72 100 972 60-140 <br /> LCS(2030286-B_S1) Prepared&Analyzed 03/21/02 <br /> Benzene _ 8 61 0 50 ug/1 10 0 861— 70-130 -- -- <br /> Toluene 9 05 0 50 100 905 70-130 <br /> Ethylbenzene 932 0 50 100 932 70-130 <br /> Xylenes(total) 28 7 0 50 300 957 10-130 <br /> Orrogate a,a a-Trijluorotoluene 101 100 101 60-140 <br /> CS DuR 2030286-BSD1 Prepared&Analyzed 03/21/02 <br /> Benzene 8 25 0 50 U911 10 0 825 70-130 427 25 <br /> Toluene 8 63 0 50 100 863 70-130 475 25 <br /> Ethylbenzene 8 88 0 50 10 0 888 70-130 484 25 <br /> Xylenes(total) 275 0 50 300 91 7 70-130 427 25 <br /> Surrogate a a a-Triuorotoluene 9 22 10 0 922 60-140 <br /> Batch 2030305-EPA 5030B(P/T) <br /> Blank(2030305-BLKI) Prepared&Analyzed 03/22/02 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trifluorotoluene 9 90 100 990 60-140 <br /> uoia 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 be reproduced to its entirety <br /> Page Page 18 of 27 <br />