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Sequoia • • 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> Analytical FAX {916)921- 00 <br /> (916)921-010100 <br /> • <br /> SECOR International Project ARCO 434, Lod,,CA Sampled 6/18/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 6/18199 <br /> Sacramento,CA 95827 Pro ect Mana er Rusty Benkosky Reported 7/6/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> S906335-06 5911 <br /> Mcthyl tert-butyl ether 9060419 6/29199 7/2199 0 100 ND mg/kg <br /> Di-isopropyl ether 0 100 ND " <br /> Ethyl tert-butyl ether 0 100 ND " <br /> Ter(-amyl methyl ether 0 100 ND " <br /> 1,2-D,chloroethane 0100 ND " <br /> Surrogate 1 2-DCA-d4 600-140 112 % <br /> PL6kZ4' 5906335-07 Sal! <br /> Tert-butyl alcohol 9060419 6/29199 7/2199 100 ND mg/kg <br /> Methyl tert-butyl ether 0 100 ND " <br /> D,-isopropyl ether 0 100 ND " <br /> Ethyl tert-butyl ether 0 100 ND " <br /> amyl methyl ether 0 100 ND " <br /> ,chloroethane 0100 ND <br /> Surrogate 1 2-DCA-d4 600-140 116 % <br /> PUAf A' 5906335-08 Sad <br /> Tert-butyl alcohol 9060419 6/29199 7/2199 100 ND mg/kg <br /> Methyl tert-butyl ether 0 l00 ND " <br /> D,-isopropyl ether 0 100 ND " <br /> Ethyl tert-butyl ether 0 100 ND " <br /> Ter[-amyl methyl ether 0 100 ND " <br /> 1,2-D,chloroethane 0 100 ND " <br /> Surrogate 1,2-DCA-d4 600-140 112 % <br /> PL8W3' S906335-09 &11 <br /> Tert-butyl alcohol 9060419 6/29/99 7/2199 too ND mg/kg <br /> Methyl tert-butyl ether 0 100 ND " <br /> Di-isopropyl ether 0 100 ND " <br /> Ethyl tert-butyl ether 0 100 ND " <br /> Tert-amyl methyl ether 0 100 ND " <br /> 1,2-Dichloroethane 0100 ND " <br /> Surrogate 1 2-DCA-d4 600-140 105 % <br /> D I la?5' S9Q633 14 w <br /> Tert-butyl alcohol 9060419 6/29/99 712199 100 ND mg/kg <br /> tert-butyl ether 0 100 ND " <br /> Sc7Toia Analytical-Sacramento *Refer to end of report for tett of notes and definitions <br /> Page 7 of 14 <br />