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819 Striker Avenue Suite 8 <br /> Sequoia Sacrm(916)921$5%W <br /> FAX(9 16)921-0100 <br /> *IWO Analytical www sequoialabs com <br /> Gettler-Ryan-Dublin Project Unocal 0187 Stockton,CA <br /> 6747 Sierra Court, Ste 1 Project Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager Paul LeCheminant 06/15/01 16 56 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Limit Notes <br /> Batch 1 F12003- EPA 5030B PIT <br /> LCS(IF12003-BS2) Prepared&Analyzed 06/13/01 <br /> Benzene 187 0 50 ug/l 20 0 935 70-130 <br /> Toluene 19 6 0 50 200 98 0 70-130 <br /> Ethylbenzene 19 8 050 200 990 70-130 <br /> Xylenes(total) 61 3 050 600 102 70-130 <br /> Surrogate a a a-Trrfluorotoluene 181 300 940 70-130 <br /> LCS(1F12003-BS3) Prepared&Analyzed 06/15/01 <br /> Benzene 19 6 050 ug/l 200 98 0 70-130 <br /> Toluene 19 8 050 200 990 70-130 <br /> Ethylbenzene 207 050 200 104 70-130 <br /> .AMUenes(total) 609 050 600 102 70-130 <br /> rogate aaa-Tri luorotoluene 281 300 93 7 70-130 <br /> LCS Dup(1F12003-BSD1) Prepared&Analyzed 06/12/01 <br /> Benzene 227 0 50 ug/l 200 114 70-130 268 20 <br /> Toluene 19 0 050 200 95 0 70-130 6 12 20 <br /> Ethylbenzene 19 1 0 50 20 0 95 5 70-130 1 56 20 <br /> Xylenes(total) 593 050 60 0 988 70-130 700 20 <br /> Surrogate a a a-Tri/luorotoluene 283 300 943 70-130 <br /> Matrix Spike(1F12003-MSI) Source W106110-01 Prepared 06/12/01 Analyzed 06/13/01 <br /> Benzene 125 0 50 ug/l 200 ND 625 70-130 Q-01 <br /> Toluene 187 050 200 ND 935 70-130 <br /> Ethylbenzene 19 8 050 200 ND 990 70-130 <br /> Xylenes(total) 57 8 050 600 ND 963 70-130 <br /> Surrogate a a a-Trrfluorotoluene 271 300 903 70-130 <br /> Matrix Spike Dup(IF12003-MSD1) Source W106110-01 Prepared 06/12/01 Analyzed 06/13/01 <br /> Benzene 14 0 050 ug/l 200 ND 700 70-130 113 20 <br /> Toluene 182 050 200 ND 91 0 70-130 271 20 <br /> Ethylbenzene 18 7 050 200 ND 93 5 70-130 5 71 20 <br /> Xylenes(total) 568 050 600 ND 947 70-130 1 75 20 <br /> Surrogate a a a-Triuorotoluene 274 300 913 70-130 <br /> equota Analytical- Sacramento The results in 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 />