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404 N Wiget Lane <br /> Sequoia Walnut Geek CA 9459$ <br /> (925)988-9600 <br /> FAX(925)%a-%73 <br /> Analytical www5��1�a� <br /> Project Chevron <br /> Clrealer Ryan,Inc -Dublin <br /> 6747 Sierra Court Suite J Project Number Chevron#9-8632 Reported <br /> Dublin CA,94568 <br /> CourtProject Manager Deanna L Harding 25-Aug-00 15 59 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Litnit Units Level Result %REC Limits RPD Lurut Notes <br /> Batch OH21003-EPA 5030B [PITT <br /> Blank(OH21003-BLK1) Prepared&Analyzed 21-Aug-00 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 0 50 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate 44a-Tnfluorotoluene 312 300 104 70-130 <br /> LCS(OH21003-BS1) Prepared&Analyzed 21-Aug-00 <br /> Berza1e 185 050 ug/l 200 925 70-130 <br /> Toluene 187 0 50 200 93 5 70-130 <br /> Ethylbenzene 190 0 50 " 200 950 70-130 <br /> Xylenes(total) 547 0 50 600 912 70-130 <br /> Surrogate qaa-Trifluorotoluene 2111 300 937 70-130 <br /> LCS Dup(OH21003-BSDI) Prepared 21-Aug-00 Analyzed 22-Aug-00 <br /> Benzene 192 050 ug/1 200 96 0 70-130 371 20 <br /> Toluene 193 0 50 200 96 5 70-130 316 20 <br /> Ethylbenzene 200 050 200 100 70-130 5 13 20 <br /> Xylenes(tom) 56 6 0 50 600 943 70-130 3 41 20 <br /> Surrogate a A a-7W luorotoluene 275 30 0 91 7 70-130 <br /> Matrix Spike(OH21003-MSI) Source W008440-03 Prepared&Analyzed 21-Aug-0O <br /> Benzene 200 0 50 ug/l 200 ND 100 70.130 <br /> Toluene 198 050 200 ND 99 0 70-130 <br /> Ethylbenzene 204 0 50 200 ND 102 70-130 <br /> Xylenes(total) 571 050 600 ND 952 70-130 <br /> Surrogate a4a-Tnfluorotoluene 296 300 98.7 70-130 <br /> Sequoia Analytical-Walnut Creek The results in flus report apply to the samples analyzed in accordance with the chiu m <br /> custody documera This mialyncal report must be reproduced in its entirjw <br /> Page 5 of 8 <br />