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t t <br /> % <br /> t Lane <br /> Sequoia 404 N Wi <br /> Walnut Creek CAA 94559898 <br /> n (925)988-9600 <br /> �„ff Analytical FAX 98&9673 <br /> www sequoquoialahs coin <br /> Secor-Rancho Cordova Project Arco t <br /> 3017 Kilgore Rd Ste #100 Project Number Arco#595, Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 29-Aug-Ol 11 26 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> r Sequoia Analytical- Walnut Creek <br /> Reporting Spike Source %REC RPD ' <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1G20001 - EPA 50308 PIT k I - <br /> LCS(IG20001-BS4) Prepared&Analyzed 26-Jul_0I <br /> Benzene - - - - 220 - ---0 50 ug/l _ T 200— - -- —1 l0 70-130 <br /> Toluene 220 050 200 110 70-130 <br /> Ethylbenzene 224 050 200 112 70-130 1 <br /> Xylenes(total) 617 050 600 103 70-130 <br /> Surrogate a a a-Trifluorotoluene J J 31 9 300 106 70-130 <br /> LCS(1G20001-BS5) Prepared&Analyzed 20-Jul-01 <br /> Benzene 190 0 50 ug/l 200 950 70-130 <br /> Toluene 19 8 050 200 990 70-130 <br /> Ethylbenzene 208 - 0 50 200 104 70-130 <br /> Xylenes(total) 62 1 050 600 104 70-130 <br /> Surrogate a a a-Trt luorotoluene 296 300 987 70-130 - <br /> Matrix Spike(1G20001-MSI) Source W107255-12 Prepared&Analyzed 20-Ju1-01 <br /> Benzene 198 050 ug/l 200 ND 940 70-130 _ <br /> Toluene 192 050 200 ND 910 70-130 <br /> Ethylbenzene 18 6 0 50 200 ND 930 70-130 <br /> Xylenes(total) _ _ _ u _-�-51 1�___= 0 50� _ - 60 0_ _ND X85 2— 70-130-- _ _ - <br /> Surrogate a a a-Trrfluarotoluene 266 300 887 70-130 <br /> Matrix Spike Dup(IG20001-MSD1) _ Source W107255-12 Prepared&Analyzed 20-Jul-01 ' <br /> Benzene 198 050 ug/l 200 ND 990 70-130 5 18 20 <br /> Toluene 19 3 050 200 ND 965 70-130 5 87 20 <br /> Ethylbenzene 195 0 50 200 ND 975 70-130 472 20 <br /> Xylenes(total) 541 0 50 600 ND 902 70-130 570 20 <br /> Surrogate aaa-Tr fluorotoluene 278 300 92 7 70-130 ' <br /> t <br /> Sequoia Analytical - Walnut Creek The results in this report apply 10 the samples analyzed in accordance with the chain o <br /> custody document This analytical report must be reproduced in its entire <br /> 1 <br /> Page 6 of 13 <br />