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404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> (925)988-9604 <br /> Analytical FAX(925)988-9673 <br /> FA!,Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco(Unocal)#6981 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 23-Nov-99 16 42 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creel <br /> Reporting Spike Source a/aREC RPD <br /> Analyte Result Lirnit Units Level Result %REC Limits RPD Linut Notes <br /> Batch 9KO8001 Prepared 08-Nov-99 Usmg EPA 5030B[PIT] <br /> LCS (9K08001-BS1) <br /> Benzene 190 050 ug/l 200 950 70-130 <br /> Toluene 177 0 50 200 885 70-130 <br /> Ethylbenzene 196 050 200 980 70-130 <br /> Xvlenes(total) 63 1 050 600 105 70 130 <br /> Surrogate a a a-Trifluorotoluene 258 " 300 860 70.130 <br /> Matrix Spike(9K08001-MSI) Source W911020-02 <br /> Benzene 21 0 0 50 ugll 200 ND 105 70-130 <br /> Toluene 19 6 0 50 200 ND 98 0 70-130 <br /> Ethylbenzene 19 9 050 200 ND 995 70 130 <br /> \ylenes(total) 712 0 50 600 ND 119 70-130 <br /> Adolk <br /> Aw a a a-Tri luoroioluene 346 300 115 70-130 <br /> Matrix Spike Dup(9K08001-MSD1) Source W911020-02 <br /> Benzene 21 6 050 ug/l 200 ND 108 70-130 282 20 <br /> Toluene 20 2 0 50 200 ND 101 70-130 3 02 20 <br /> Ethylbenzerte 224 0 50 200 ND 112 70-130 118 20 <br /> \ylenes(total) 72 1 050 60 0 ND 120 70-130 126 20 <br /> Surrogate aa a-Tnfluoroioluene 28 6 300 953 70-130 <br /> S* <br /> Analytical - Walnut Creel( The results in thrs report apply to the samples analyzed to arcordMce with the thorn of <br /> custody document Tits analytical report must be reproduced in its enarery <br /> r <br /> > 1 e eg ey, roJect a er Page 16 of 19 <br />