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(•1 8. <br /> Sinker Avenue,Suite 8 <br /> Sequoia 819Sacramento,CA 95834 <br /> q0I (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs cont <br /> • SBCOR International-Rancho Cordova Ptoject ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Prom Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 P-ject Ma-9- 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 [Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2030330-EPA 5030B(PIT) <br /> LCS 2030330-BSl Prepared&Analyzed 03/25/02 <br /> Benzene 8 57 050 ug/l 100 857 70-130 <br /> Toluene 907 0 50 10 0 907 70-130 <br /> Ethylbenzene 933 050 10 0 933 70-130 <br /> Xylenes(total) 297 050 300 957 70-130 <br /> Surrogate a a a-Trifluorotoluene 107 100 107 60-140 <br /> Matrix Spike(2030330-MSI) _ Source S203292-01 Prepared&Analyzed 03/25/02 <br /> Benzene 8 47 0 50 ug/l 10 0 ND 847 60-140 <br /> Toluene 9 12 050 100 ND 91 2 60-140 <br /> Etbylbenzene 9 48 050 10 0 ND 948 60-140 <br /> Xylenes(total) 28 9 050 30 0 ND 963 60-140 <br /> Surrogate a a a-Trifluorotoluene 104 10 0 104 60-140 <br /> atrix Spike Dup(2030330-MSD1) Source 5203292-01 Prepared&Analysed 03/25/02 <br /> enzene 8 95 050 ug/l 10 0 ND 895 60-140 5 51 25 <br /> Toluene 964 0 50 10 0 ND 964 60-140 5 54 25 <br /> Ethylbenzene 997 0 50 100 ND 997 60-140 5 04 25 <br /> Xylenes(total) 303 050 300 ND 101 60-140 4 73 25 <br /> Surrogate a a a-Trifluorotoluene 103 100 103 60-140 <br /> �e(ltiOia 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 20 of 27 <br />