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Sequoia 819 Straker Avenue,Suite 8 <br /> 4DSacramento,CA 95834 <br /> WoAnalytical (916)921 9600 <br /> FAX(916)921-0100 <br /> www seyuoialabs coin <br /> SECOR International-Rancho Cordova Project ARCO 5450,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 5450,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/26/02 16 46 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFI'-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPB Limit Notes <br /> Batch 2020300-EPA 5030E P <br /> Blank 2020300-BLKI Prepared&Analyzed 02/22/02 <br /> Purgeable Hydrocarbons ND 0 50 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Trifluorotoluene 00176 00200 880 60-140 <br /> LCS(2020300-BS1) - Prepared&Ana] zed 02/22/02 <br /> Benzene 00160 00050 mg/kg 00200 800 70-130 <br /> Toluene 0 0165 00050 00200 82 5 70-130 <br /> Ethylbenzene 00182 00050 0 0200 91 0 70-130 <br /> Xylenes(total) 00524 0 0050 00600 87 3 70-130 <br /> 0Surrogate a a a-Trifluorotoluene 00153 00200 765 60-140 <br /> Matrix S ike 2020300-MS] Source 5202260-05 Prepared&Analyzed 02/22/02 <br /> Benzene 00146 00050 mg/kg 0 0200 ND 730 60-140 <br /> Toluene 00146 00050 00200 ND 73 0 60-140 <br /> Ethylbenzene 0 0163 00050 00200 ND 81 5 60-140 <br /> Xylenes(total) 00473 00050 0 0600 ND 788 60-140 <br /> Surrogate a,a a-Trifluorotoluene 00149 00200 74 5 60-140 <br /> Matnx Spike Du 2020300-MSDI Source 5202260-05 Preeared&Analyzed 02/22/02 <br /> Benzene 00146 0 0050 mg/kg 00200 ND 730 60-140 0 00 25 <br /> Toluene 00149 00050 00200 ND 745 60-140 2 03 25 <br /> Ethylbenzene 00165 00050 00200 ND 82 5 60-140 1 22 25 <br /> Xylenes(total) 00478 00050 00600 ND 797 60-140 1 05 25 <br /> Surrogate a,a a-Triuorotoluene 00139 00200 695 60-140 <br /> Sequoia Analytical-Sacramento The results to 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 4 of 6 <br />