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404 N Wig&Lane <br /> Sequoia Walnut Creek CA 94598 <br /> FAX(925)988-9673 <br /> %W <br /> Analytical WWWsequolalabs corn <br /> Gettler Ryan, Inc -Dublin Project Chevron <br /> 6747 Siena Court Suite J Project Number Chevron 4 9-1848 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 27-Jul-01 10 26 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch IC20001 -EPA 5030B P/T <br /> LCS(IG20001-BS5) - - -Prepared&Analyzed 20-Jul-01 <br /> Benzene 190 050 ug/I 200 950 70-130 <br /> Toluene 198 050 200 990 70-130 <br /> Ethylbenzene 208 050 200 104 70-130 <br /> Xylenes(total) 621 050 600 104 70-130 <br /> Surrogate a,a,a-Trifluorotoluene 296 300 987 70-134 <br /> Matrix Spike(IG20001-MSI) Source W107255-12 Prepared&Analyzed 20-Jul-01 <br /> Benzene 188 050 ugll 200 ND 940 70-130 <br /> Toluene 18 2 050 200 ND 910 70-130 <br /> Ethylbenzene 186 050 200 ND 930 70-130 <br /> Xylenes(total) 51 1 0 50 600 ND 852 70-130 <br /> Surrogate a a a-Triuorotoluene 266 300 887 70-134 • <br /> Matrix Spike Dup(1G20001-MSDI) Source W107255-12 Prepared&Analyzed 20-Jul-01 <br /> Benzene 19 8 050 ug/1 200 ND 990 70-130 5 18 20 <br /> Toluene 193 050 200 ND 965 70-130 5 87 20 <br /> Ethylbenzene 19 5 050 200 ND 975 70-130 4 72 20 <br /> Xylenes(total) 54 1 050 600 ND 902 70-130 570 20 <br /> Surrogate a,a,a-Tri luorololuene 278 300 927 74-130 <br /> Sequoia Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the clr_r <br /> custody document This analytical report must be reproduced in its en <br /> Page 7 of 9 <br />