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4D (91819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 7 <br /> 6)921-9600 <br /> Analytical FAX(916)921-0100 <br /> WWW sequoialabs cam <br /> SECOR International-Rancho Cordova Pr4lect ARCO 4493, Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 P-icet Manager Rusty Benkosky 05/24/02 16 48 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT-Quahty 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 2050174-EPA 5030B PIT <br /> Blank 2050174-BLKI Prepared&Analyzed 05/15/02 <br /> Purgeable Hydrocarbons ND 050 mg/kg <br /> Benzene ND 0 0050 " <br /> Toluene ND 0 0050 " <br /> Ethylbenzene ND 0 0050 " <br /> Xylenes(total) ND 0 0050 " <br /> Surrogate a a a-Trifluorotoluene 00218 00200 109 60-140 <br /> LCS(2050174-BS1) __ Prepared&_Analyzed 05/15/02 <br /> Benzene 00208 0 0050 mg/kg 0 0200 104 70-130 <br /> Toluene 00192 0 0050 00200 96 70-130 <br /> Ethylbenzene 00202 0 0050 0 0200 101 70-130 <br /> Xylenes(total) 00586 0 0050 0 0600 98 70-130 <br /> Wurrogate a a a-Trifluorotoluene 00208 00200 104 60-140 <br /> Matrix Spike 2050174-MS1Source 5205153-05 Prepared&Analyzed 05/15/02 <br /> Benzene 00192 0 0050 mg/kg 00200 ND 96 60-140 <br /> Toluene 00183 0 0050 00200 ND 92 60-140 <br /> Ethylbenzene 00193 0 0050 00200 ND 97 60-140 <br /> Xylenes(total) 00557 0 0050 00600 ND 93 60-140 <br /> Surrogate a a a-Trifluorotoluene 00187 00200 94 60-140 <br /> Matnx Spike Du 2050174-MSD1 Source S205153-05 Prepared&Analyzed 05/15/02 <br /> Benzene 00208 0 0050 mg/kg 00200 ND 104 60-140 8 25 <br /> Toluene 00198 0 0050 00200 ND 99 60-140 8 25 <br /> Ethylbenzene 0 0207 0 0050 00200 ND 104 60-140 7 25 <br /> Xylenes(total) 00596 0 0050 00600 ND 99 60-140 7 25 <br /> Surrogate a a a-Trifluorotoluene 00190 00200 95 60-140 <br /> 0 Sequoia Analytical-Sacramento The results in this report apply io the samples analyzed in accordance with the chain <br /> of custody document This analytical report must he reproduced in its entirety <br /> Page Page 6 of 9 <br />