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4 G <br /> 404 N Wiget Lane <br /> Sequoia Walnut Creek, -9600 <br /> 94598 <br /> (925)98 98 8-9600 <br /> 4 4D— <br /> FAX(925)958-9673 <br /> Analytical www sec,uolalabs corn <br /> 4W <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> Dublin CA,94568 Project Manager Scott Polston l8-Jul-01 08 02 <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 1G02003-EPA 5030B PIT <br /> LCS(1G02003-BSI) Prepared 02-Jul-01 Analyzed 05-Jul-01 <br /> Benzene 155 0 10 mglm'Air 200 775 70-130 <br /> Toluene 1 44 0 10 200 720 70-130 <br /> Ethylbenzene 141 010 200 705 70-130 <br /> Xylenes(total) 449 0 10 600 747 70-130 <br /> Surrogate a a a-Trifluorotoluene 508 600 847 70-130 <br /> LCS(IG02003-BS2) Prepared&Analyzed 03-Jul-01 <br /> Benzene 3 76 0 10 mg/ml Air 400 940 70-130 <br /> Toluene 3 62 010 " 400 905 70-130 <br /> Ethylbenzene 3 62 010 400 905 70-130 <br /> Xylenes(total) 113 0 t0 12 0 942 70-130W - <br /> gate a,a a-Trtfluorotoluene 5 72 600 95 3 70-130 <br /> LCS(IG02003-BS3) Prepared&Analyzed 05-Jul-Ol <br /> Benzene 4 28 010 nig/m'Air 400 107 70-130 <br /> Toluene 348 010 400 87 0 70-130 <br /> Ethylbenzene 3 52 010 400 880 70-130 <br /> Xylenes(total) 108 010 12 0 900 70-130 <br /> Surrogate a a a-Trifluorotoluene 588 <br /> 600 98 0 70-130 <br /> LCS(IG02003-BS4) Prepared&Analyzed 06-Jul-01 <br /> Benzene — 4 20 010 mg/m'Air 400 105 70-130 <br /> Toluene 3 70 0 10 400 925 70-130 <br /> Ethylbenzene 3 86 010 " 400 965 70-130 <br /> Xylenes(total) 112 010 12 0 93 3 70-130 <br /> Surrogate a a a-Tri,Jluorotoluene <br /> S 76 600 960 70-130 <br /> LCS Dup(lG02003-BSDI) Prepared 02-Jul-01 Analyzed 05-Jul-01 <br /> Benzene 130 010 mg/ml Air 200 65 0 70-130 175 25 Q-01 <br /> Toluene 165 010 200 82 5 70-130 13 6 25 <br /> Ethylbenzene 172 oto 200 860 70-130 198 25 <br /> Xylenes(total) 5 18 010 600 86 3 70-130 14 5 25 <br /> Surrogate a a a-Trifluorotoluene 524 600 873 70-1.30 <br /> uota Analytical -Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 5 of 6 <br />