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404 N W19et Lane <br /> Sequoia Walnut Creek,CA 9459$ <br /> 4 (92 <br /> 5)9ss-9600 <br /> FAX(925)988-%73 <br /> Analytical w%vw sequolalabs corn <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite 7 Project Number Unocal#0123 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 07-Apr-00 15 41 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lunit Notes <br /> Batch OC30001 -EPA 5030B[PIT] <br /> Blank(OC30001-BIM) Prepared&Analyzed 30-Mar-00 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate qqa-Trifluorotoluene 281 300 937 70-130 <br /> LCS(OC30001-BS1) Prepared&Analyzed 30-Mar-00 <br /> Benzene 166 0 50 ug/l 200 83 0 70-130 <br /> Toluene 172 0 50 200 860 70-130 <br /> Ethylbenzene 180 0 50 200 900 70-130 <br /> Xylenes(total) 563 0 50 60 0 93 8 70-130 <br /> Surrogate q q a-Tnfluorotoluene 260 300 867 70-130 <br /> Matrix Spike(OC30001-MSI) Source W003663-04 Prepared&Analyzed 30-Mar-00 <br /> Benzene 180 0 50 ug/l 200 ND 900 70-130 <br /> Toluene 18S 0 50 200 ND 915 70-130 <br /> Ethylberizene 205 0 50 200 ND 103 70-130 <br /> Xylenes(total) 584 0 50 600 ND 973 70.130 <br /> Surrogate aa a-Tnfluorotoluene� --- - T = =--264- ---- - - "300—- - --= W88 0 - 70-130 - <br /> Matrix Spike Dnp (OC30001-MSD1) Source W003663-04 Prepared&Analyzed 30-Mar-00 <br /> Benzene 177 0 50 ug/l 200 ND 885 70-130 168 20 <br /> Toluene 180 050 " 200 ND 900 70.130 165 20 <br /> Ethylbenzene 208 0 50 " 200 ND 104 70-130 145 20 <br /> Xylenes(total) 584 0 50 600 ND 973 70-130 0 20 <br /> Surrogate atga-Tnfhaorotoluene 167 If 300 890 70.130 <br /> Sequoia Analytical-Walnut Creek The results in tins report apply to the samples analyzed in accordance with the char"o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 14 of 18 <br />