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Sequoia 819 Avenue Suite 8 <br /> Sacraarra mento, CA 95834 <br /> 4 (916)921-9600 <br /> (i) Analytical FAX(916)921-0100 <br /> Upgradient-Cameron Park Project Conrady Sampled 7/15199 <br /> 3369 Kimberly Road ProjectNumber N/A Received 7/15/99 <br /> Cameron Park,CA 95682 Project Manager NIA Reported 7/23/99 <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX by DHS LUFTIQuabty Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Linuts % Limit % Notes* <br /> LCA(cnnt nued) 9070225-BSI <br /> Ethylbenzene 7/20199 100 971 ug/l 700-130 97 1 <br /> Xylenes(total) 300 293 11700-130 977 <br /> Surrogate a,a a-Tr{fluorotoluene 100 913 10600-140 913 <br /> Matrix Sntke 9070225-MSI S907162-06 <br /> Benzene 7/20199 100 ND 928 ug/l 600-140 97 8 <br /> Toluene 100 ND 930 600-140 930 <br /> Ethylbenzene 10 0 ND 934 600-140 93 4 <br /> Xylenes(total) 300 ND 280 600-140 933 <br /> Surrogate a a,a-Tr f uorotoluene 100 8 59 600-140 85 9 <br /> Matrix Spike Dup 4070225-MSD1 S907162-M <br /> Benzene 7/20/99 100 ND 923 ug/l 600-140 923 250 0 540 <br /> 01.uyene, 10 0 ND 961 600-140 961 25 0 3 28 <br /> lbzcne 100 ND 967 600-140 967 25 0 3 47 <br /> enes(total) 300 ND 287 600 <br /> 95 7 25 0 2 54 <br /> Surrogate a,a a-Trafuorotoluene 100 818 600-140 818 <br /> equoia Analytical-Sacramento *Refer to end of report for text of notes and def rations <br /> Page 4 of 5 <br />