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�Sequoia <br />Analytical <br />404 N Wlget Lane <br />Walnut Creek, CA 94598 <br />(925) 988-960p <br />FAX (925) 988-9673 <br />Gettler Rvan, Inc - Dublin Project Chevron <br />6747 Sierra Court Suite 7 Project Number Former Chevron #9-5775 Reported <br />Dublin CA, 94568 Project Manager Steve Carter 03 -Mar -00 1141 <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 Linut Units Level Result %REC Luruts RPD Limit Notes <br />Batch 00O2001• Prepared 02 -Mar -00 <br />Using EPA 5030B [PIT] <br />Blank (00O2001-BLK1) <br />Purgeable Hydrocarbons <br />ND <br />50 <br />ugll <br />Benzene <br />Nd <br />0 50 <br />" <br />Toluene <br />ND <br />0 50 <br />" <br />Ethylbenzene <br />ND <br />050 <br />" <br />Xylenes (total) <br />ND <br />050 <br />" <br />Methyl tett-butyl ether <br />ND <br />25 <br />" <br />Surrogate aaa-Tnfluorotoluene <br />285 <br />300 <br />950 <br />70-130 <br />LCS (00O2001 -BSI) <br />Benzene <br />17 5 <br />050 <br />ug/1 <br />200 <br />875 <br />70-130 <br />Toluene <br />Ethylbenzene <br />t82 <br />176 <br />0 50 <br />050 <br />200 <br />200 <br />910 <br />880 <br />70-130 <br />70-130 <br />. <br />Xylenes (total) <br />5945 <br />0 50 <br />60 1) <br />977 <br />70-130 <br />Surrogate a aa-Tnfluorotohrene <br />268 <br />30 0 <br />8.93 <br />70-130 <br />Matrix Spike (00O2001-MS1) <br />Source <br />W003001-01RE1 <br />Benzene <br />173 <br />0 50 <br />ugll <br />200 <br />ND <br />865 <br />70-130 <br />Toluene <br />176 <br />0 50 <br />200 <br />ND <br />880 <br />70-130 <br />Ethylbenzene <br />185 <br />0 50 <br />200 <br />ND <br />92 5 <br />70-130 <br />Xylenes (total) <br />59 2 <br />050 <br />600 <br />ND <br />98 7 <br />70-130 <br />Surrogate as a-Tnfluorotoluene <br />278 <br />300 <br />92 7 <br />70-130 <br />Matrix Spike Dup (00O2001-MSD1) <br />Source <br />W003001-01RE1 <br />Benzene <br />176 <br />0 50 <br />ug/l <br />200 <br />ND <br />880 <br />70-130 <br />172 <br />20 <br />Toluene <br />178 <br />050 <br />200 <br />ND <br />890 <br />70-130 <br />l 13 <br />20 <br />Ethylbenzene <br />182 <br />0 50 <br />200 <br />ND <br />910 <br />70-130 <br />163 <br />20 <br />Xylenes (total) <br />582 <br />0 50 <br />600 <br />ND <br />970 <br />70-130 <br />170 <br />20 <br />Surrogate ataa-Tnfiuorotoluene <br />259 <br />300 <br />863 <br />70-130 <br />Sequoia Analytical - Walnut Creek The results in thrs report apply to the samples analyzed i n accordance with the chwit <br />custody document This analyhcal report must be reproducedin its esti <br />;' 0'�LD <br />an emp, Laboratory rector <br />Page 4 of 6 <br />