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819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> `1 (916)921-9600 <br /> Analytical FAX(916)92 1-0100 <br /> www sequoialabs com <br /> IT Corporation-Sacramento Project Parkinson's ARCO,Stockton <br /> 1326N Market)3]vd Project Number $80-040 1 A/01060000 Reported <br /> Sacramento CA,95834 PrnJect 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 2020020-EPA 5030B [PIT] <br /> Blank(2020020-BLKI) Prepared&Analyzed 02/04/02 <br /> Tert-butyl alcohol ND 50 ug/1 <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> Surrogate 1 2-DCA-d4 243 250 972 60-140 <br /> LCS(2020020-BSI) Prepared&Analyzed 02/04/02 <br /> Methyl cert-butyl ether 265 050 ug/l 25 0 106 60-140 <br /> Surrogate 12-DCA-d4 273 1250 109 60-140 <br /> Matrix Spike(2020020-MS1) Source S201406-06 Prepared&Analyzed 02/04/02 <br /> ethyl tert-butyl ether 43 I 050 ug/1 250 19 964 60-140 <br /> Surrogate 12-DCA-d4 272 250 109 60-140 <br /> Matrix Spike Dup(2020020-MSDI) Source 5201406-06 Prepared&Analyzed 02/04/02 <br /> Methyl tert-butyl ether 482 050 ug/1 250 19 117 60-140 112 25 <br /> Surrogate 12-DCA-d4 282 250 113 60-140 <br /> Batch 2020035-EPA 5030E JP/TJ <br /> Blank(2020035-BLKI) Prepared&Analyzed 02/05/02 <br /> Tert-butyl alcohol ND 50 upJl <br /> Methyl tent-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 " <br /> Teri-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> Surrogate 1 2-DCA-d4 261 250 104 60-140 <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 he reproduced in its entirety <br /> i <br /> Page Page 6 of 9 <br />