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819 Striker Avenue,Suite 8 <br /> * Sequoia Sacramento )9 60 <br /> 95834 <br /> 4 (916)921-96 <br /> t Analytical FAX(916)921 0100 <br /> www sequoialabs corn <br /> IT Corporation-Sacramento Project Parkinson's ARCO,Stockton <br /> 1326 N Market Blvd Project Number 880-040 1 A/01060000 Reported <br /> Sacramento CA,95834 Project Manager Mike Sgourakis 02/13/02 09 57 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result "/.REC Limits RPD Limit Notes <br /> Batch 2020035-EPA 5030B [PIT] <br /> LCS(2020035-BSI) Prepared&Analyzed 02/05/02 <br /> Methyl tort-butyl ether 231 050 ug/1 250 924 60-140 <br /> Surrogate 1 2-DCA-d4 266 " 2-50 106 60-740 <br /> Matrix Spike(2020035-MSI) Source S202037-OI REI Prepared&Analyzed 02/05/02 <br /> Methyl tert-butyl ether 191 050 ug/1 250 1 0 724 60-140 --_ <br /> Surrogate 1 2-DCA-d4 244 250 976 60-140 <br /> Matrix Spike Dup(2020035-MSDI) Source S202037-01RE1 Prepared&Analyzed 02/05/02 <br /> Methyl tert-butyl ether 223 050 ug/l 250 10 852 60-140 155 25 <br /> Surrogate 12-DCA-d4 254 250 102 60-140 <br /> Batch 2020072-EPA 5030B[P/Tl <br /> Blank(2020072-BLKI) Prepared&Analyzed 02/07/02 <br /> butyl alcohol ND 50 ug/l <br /> Methyl tent-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl cert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> Surrogate 1 2-DCA-d4 203 250 812 60-140 <br /> LCS(2020072-BSI) Prepared&Analyzed 02/07/02 <br /> Methyl tert-butyl ether 243 050 ug/1 250 972 60-140 <br /> Surrogate 1 2-DCA-d4 205 " 250 810 60-140 <br /> Matrix Spike(2020072-MS1) Source 5201435-02 Prepared&Analyzed 02/07/02 <br /> Methyl tert-butyl ether 224 050 ug/1 250 080 864 60-140 <br /> Surrogate 12-DCA-d4 197 250 788 60-140 <br /> I <br /> equola Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page Page 7 of 9 <br />