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w In <br /> c f , <br /> 4DSequoia 404 N CA Lane <br /> Walnut Creek, CA 94598 <br /> qwrAnalytical (925) 988-9600 <br /> FAX(925) 988-9673 <br /> Gettler Ryan,Inc -Dublin - Project Unocal <br /> E <br /> 6747 Sierra Court Suite J Project Number Unocal 4 2859 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 09-Mar-00 10 29 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek ,r <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lulut Units Level Result %RFC Limits RPD Limit Notes <br /> Batch OB23001 -EPA 5030B [PIT] <br /> LCS(OB23001-BSI) Prepared&Analyzed 23-Feb-00 <br /> Benzene 192 050 ug/1 200 960 70-130 <br /> Toluene 196 050 200 980 70-130 <br /> Ethylbenzene 180 050 200 900 70-130 <br /> Xylenes(total) 612 050 600 105 70-130 <br /> 1 f <br /> Surrogate aa,a-Trii luorotoluene 286 300 953 70-130 <br /> Matrix Spice(OB23001-MS1) Source W002470-03 Prepared&Analyzed 23-Feb-00 <br /> Benzene 243 050 ugn 200 68 875 70-130 y <br /> Toluene _ 191 050 200 ND 955, 70-130 <br /> Ethylbenzenc 176 050 200 ND 880 70-130 <br /> Xylenes(total) 614 050 600 ND 102 70-130 <br /> Surrogate qqa-Tryluorotoluene 300 300 100 70.130 <br /> Matrix Spike Dup(OB23001-MSD1) Source W002470-03 Prepared&Analyzed 23-Feb-00 <br /> Benzene 267 0 50 ugll 200 68 99 5 70-130 941 20 <br /> Toluene 198 0 50 200 ND 990 70-130 360 20 <br /> Ethylbenzene 195 0 50 200 ND 975 70-130 102 20 <br /> Xylenes(total) —63 7 050 60 0 ND 106-70.130-3 68--20 � --- <br /> Surrogate a qa Trr . __. 313J _ - _ .__. ' 300 104 __70-130 - <br /> Batch OB24003-EPA 5030B [PIT] <br /> Blank(OB24003-BLKJ) Prepared&Analyzed 24-Feb-00 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 - <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tett-butyl ether ND 25 Y ti <br /> Surrogate a a,o-Tnfluorotoluene 333 300 111 70-130 <br /> I <br /> I <br /> Sequoia Analytical-Walnut Geek The results in thrs report apply to the samples ana4ced in accordmice with the charm o <br /> custody document This analytical report must be reproduced in its entire <br /> Page 14 of 21 <br />