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1551 Industrial Road <br /> Sequoia San Carlos CA230 <br /> ��""��� (650)232-960-9600 <br /> iiwAnalytical-== _ ---_ -- - T - _- -- _-- - --_- -_ -- -_�_ - _ -- FAXcquoWabsco2 <br /> www sequatalabs torn <br /> Gettler-12yan1Geostrategies(I) Project Tosco(l) <br /> 6747 Sierra Court, Suite J Project Number Tosco#5886,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 11/02/01 15 ,:I <br />�-__ _n_,r - — __ - --MTBE=by=DHS4LUFT- Quallty_Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result - Limit 'Units Level Result- %REG Lunits RPD Limit Notes <br /> Batch 11100127 -EPA 5030B(PIT) - - <br /> LCS(l 100127-BS2) Prepared&Analyzed 10/29/01 -, -- - - - - — <br /> Surrogate a,a,a-Triuorotoluene 105 ug/I 100 105 60-140 <br /> Matrix S ike(11fl0127-MSI) Source L110129-04 Prepared&Analyzed 10/29/01 <br /> Methyl tert-butyl ether 431 50 ug/1 500 330 202 60-140 Q-02 <br /> Surrogate aaa-Trifluorotol uene 103 11100 103 60-140 <br /> Matrix Spike Dup(1100127-MSDI) Source L110129-04 Prepared&Analyzed 10/29/01 <br /> Methyl Cert-butyl ether 461 50 ug/l 50 0 330 262 60-140 6 73 25 Q 02 <br /> Surrogate a,a a-Triuorotoluene 101 100 101 60-140 <br /> Batch 1100130-EPA 5030B(PIT) <br /> Blank(1100130-BLKI) Prepared&Analyzed 10/30/01 <br /> Methyl ten-butyl ether ND so ug/1 <br /> Surrogate aaa-Tr ftuoroioluene 873 100 873 60-140 <br /> LCS(1100130-BSI) Prepared&Analyzed 10/30/01 <br /> Methyl tert-butyl ether 388 50 ugA 500 776 10-130 <br /> Surrogate a a,a-Trifluorotoluene 891 100 891 60-140 <br /> LCS(1100130-BS2) Prepared&Analyzed 10/30/01 <br /> Surrogate a a a-Tr fluorotoluene 993 u9/1 100 993 60-140 <br /> Matrix Spike(1100130-MSI) Source L110136-04 Prepared&Analyzed 10/30/01 <br /> Surrogate a a a-Triuorotoluene 111 ug/I 100 111 60-140 <br /> Matrix Spike Dup(1100130-MSDI) Source L110136-04 Prepared&Analyzed 10/30/01 <br /> Surrogate a,o a-Triuorotoluene 954 219/1 100 954 60-140 <br /> Sequoia Analytical-San Carlos The results to this report apply to the samples analyzed to accordance with the chain <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 5 of 6 <br />