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(D Sequoia1551 Industrial FRoad <br /> 4 <br /> San Carlos CA 94070-4111 <br /> Analytical (650) 232-9600 <br /> FAX(650) 232-9612 <br /> 14W <br /> Environmental Resolutions Project Tosco(1) Sampled 5111199 to 5/12199 <br /> 74 Digital Drive,Suite 6 ProjectNumber Tosco 76#5886 Received 5112/99 <br /> Novato,CA 94949 Project Manager Keith Romstad Reported 5127199 <br /> s',�' «'s'- :,�^„ �' . xs, � <br /> aT `Vfa PF �a a slxocarbons(CCrC12)and TEX iy'DH�. Qaalitt} Confr 1 r £E <br /> -`S,r,� ':zrnn�•''a¢,„,x> a Via„ �� waist <br /> ` �. 'All lgeq AIIAI <br /> u <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> LCS cont30Ued 9050112-SSI <br /> Ethylbenzene 5/25/99 953 ug/I 700-130 853 <br /> Xylenes(total) 258 700-130 861 <br /> Surrogate a,a,o-Triifluorotoluene 100 767 600-140 767 <br /> Matrix Spike_ 9050112-MSI L905256-05 <br /> Benzene 5/25/999 100 ND 864 ug/1 600-140 86A <br /> Toluene 100 ND 855 " 600-140 855 <br /> Ethylbenzene 100 ND 858 600-140 85.8 <br /> Xylenes(total) 300 ND 257 600-140 857 <br /> Surrogate aa a-Tri luorotoluene " 100 835 600-140 835 <br /> Metrix Spike Dup 9050112-MSDI L905256-05 <br /> Benzene 5125199 too ND 840 ug/l 600-140 840 25 0 2.82 <br /> Toluene 100 ND 828 " 600-140 828 250 3 21 <br /> *benzene n 100 ND 825 600-140 82.5 25 0 3.92 — <br /> es(total) 300 ND 245 600-140 817 250 478 <br /> Surrogate a OO-Tnfluorotoluene 100 798 600-140 798 <br /> oia Analytical-San Carlos 'Refer to end ofreport for text of notes and definitions <br /> Page 7 of 0 <br />