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1 J <br /> 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> l 1 <br /> a— ) (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs cam <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 Clinton Hanns 03/08/02 17 34 <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 RPD Limit Notes <br /> Batch 2030067-EPA 5030B(PIT) <br /> Blank 2030067-BLK1Prepared&Analyzed 03/05/02 <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 00189 00200 945 60-140 <br /> LCS 2030067-BS1) Prepared&Anal 03/05/02 <br /> Benzene 00180 00050 mg/kg 00200 900 70-130 <br /> Toluene 00173 00050 " 00200 865 70-130 <br /> Ethylbenzene 0 0188 00050 00200 940 70-130 <br /> Xylenes(total) 00539 00050 00600 898 70-130 <br /> Surrogate a a a-Trifluorotoluene 00184 00200 92 0 60-140 <br /> Matrix Spike(2030067-MSl) Source 52023_70-01 Prepared&Analyzed 03/05/02 _ <br /> Benzene 00198 00050 -mg/kg 00200 ND 990 60-140 . <br /> Toluene 00191 00050 00200 ND 955 60-140 <br /> Ethylbenzene 00208 00050 00200 ND 104 60-140 <br /> Xylenes(total) 00595 0 0050 00600 ND 992 60-140 <br /> Surrogate a,a a-Trifluorotoluene 00187 00200 935 60-140 <br /> Matrix Spike Du 2030067-MSD/ Source S202370-01 Prepared&Anal zed 03/05/02 <br /> Benzene 00197 00050 mg/kg 00200 ND 985 60-140 0 506 25 <br /> Toluene 00188 00050 00200 ND 940 60-140 1 58 25 <br /> Ethylbenzene 00206 00050 00200 ND 103 60-140 0 966 25 <br /> Xylenes(total) 00586 00050 00600 ND 977 60-140 152 25 <br /> Surrogate a aa-Trifluorotoluene 00184 00200 920 60-140 <br /> Sequoia 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 in its entirety <br /> Page Page 13 of 17 <br />