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619 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical www (916) 00 <br /> sequolatabs alabs corn orn <br /> SECOR International-Rancho Cordova Project ARCO 595,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br />' Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/20/01 IS 00 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limn Units Level Result %RFC Limits RPD Limit Notes <br /> Batch 1080132-EPA 5030B [PIT] <br /> Bank(1080132-BLK1) Prepared&Analyzed 08/13/0I <br /> Tert-butyl alcohol ND 200 ug/I <br /> riethyl <br /> tert-butyl ether ND 20 <br /> -isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> FTamyl methyl ether ND 20 <br /> ol ND 3000 " <br /> I 2-Dichloroethane ND 20 " <br /> Ethylene dibromide ND 20 " <br /> arrogate 1,2-DCA-d4 480 500 960 60-140 <br /> LCS(1080132-BSI) _ Prepared&Analyzed 08/13/01 <br /> tert-butyl ether 5t 6 20 ug/l 500 t03 60-140 _T <br />§AWate 12-DCA-d4 489 " 500 978 60-140 T <br /> Matrix Spike(108013_2-_M_S1) Source 5108043-02 _ Prepared&Analyzed 08/13/01 _ <br /> JF4,;iW;1 tert-butyl ether St 6 20 ug/1 500 ND 103 60-140 <br /> arrogate 12-DCA-d4 484 500 968 60-140 <br /> atrix Spike Dup(1080132-MSDI) Source 5108043-02 Prepared&Analyzed 08/13/01 <br /> Methyl tert-butyl ether 543 20 ug/1 500 ND 109 60-140 5 10 25 _ �- <br /> Surrogate 12-DCA-d4 492 500 984 60-140 <br /> etch 1080147- EPA 5030B [P/TJ <br /> lank(1080147-BLKI) _ Prepared&Analyzed 08/14/01 <br /> Tert-butyl alcohol ND 200 ug/1 <br /> ethyl tert-butyl ether ND 20 '1 <br /> -Isopropyl ether ND 20 <br /> Ethyl Cert-butyl ether ND 20 " <br /> Wert-amyl methyl ether ND 20 " <br /> than[ ND 3000 " <br /> 1,2-Dichloroethane ND 20 " <br /> thylene dibrorride ND 20 <br /> arrogate 1 2-DCA-d4 484 500 968 60-140 <br /> to 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 I I of 13 <br />