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404 N Wiget Lane , <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988 9600 <br /> Analytical FAX 988 9673 <br /> w ' <br /> ww seqecluo uoialabs com <br /> Secor- Rancho Cordova Project Arco ' <br /> 3017 Kilgore Rd Ste #100 Project Number Arco#4932 Stockton Reported <br /> Rancho Cordova CA 95670 Project Manager Rusty Benkosky 31-Jul-01 10 56 <br /> Total Purgeable Hydrocarbons (C6-Cl2) and BTEX by DHS LUFT- Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %RLC RPD ' <br /> Analyte Result Limit Units Level Result %RLC Limits RPD Limit Notes <br /> 3atch IC20008 - EPA 5030B McOH <br /> 31ank(IG20008-BLK1) Prepared 20-Jul-01 Analyzed 23-Jul-01 , <br /> 'urgeable Hydrocarbons ND 10 mg/kg <br /> lenzene ND 00050 <br /> Toluene ND 00050 , <br /> thylbenzene ND 00050 " <br /> (ylenes(total) ND 00050 <br /> )urrogale a a a-Triuorotoluene 0 660 - 0 600 110 40-140 <br /> t.CS(IG20008-BSI) Prepared 20-Jul-01 Analyzed 25-Tui-01 <br /> lenzene 0 802 0 0050 mg/kg 0-0-0- 100 50-150 <br /> Toluene 0 840 00050 0 800 105 50-150 ' <br /> 3thylbenzene 0 870 00050 0 800 109 50-150 <br /> (ylenes(total) 263 00050 240 110 50-150 - f <br /> 4urrogale aaa-Trtfluorotoluene 0 796 0 600 133 40-140 , <br /> Matrix Spike(1G20008-MS1) Source W107294-05 Prepared 20-Jul-01 Analyzed 26-Jul-01 <br /> Benzene 0 758 00050 mg/kg F 0 800 ND 948 50-150 ' <br /> roluene 0 798 00050 0 800 ND 998 50-150 <br /> Ethylbenzene 0 832 00050 0 800 ND 104 50-150 <br /> Xylenes(total) 248 00050 240 ND 103 50-150 <br /> Surrogate aaa-Tr�uorotoluene 0 622 0 600 104 40-140 <br /> Matrix Spike Dup(1G20008-MSD1) Source W107294-05 Prepared 20-Jul-01 Analyzed 26-Jul-01 <br /> Benzene 0 756 00050 mg/kg 0 800 ND 945 50-150 0 264 20 , <br /> Toluene 0 798 00050 0 800 ND 998 50-150 000 20 <br /> Ethylbenzene 0 832 0 0050 0 800 ND 104 50-150 000 20 <br /> Xylenes(total) 251 00050 240 ND 105 50-150 120 20 <br /> Surrogate a a a-Trrf7uoratoluetie - 0 618 0 600 103 40-140 <br /> 1 <br /> Sequoia Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with rhe chain o ' <br /> custody document This analytical report muse be reproduced in its entir <br /> Page 9 of 13 <br />