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Sequoia <br /> ID 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> I„o Analytical (916)921-9600 <br /> FAX(916)921-0100 <br /> Emcon-Cameron Park ' <br /> Project: ARCO 2186,Stockton Sampled: 6/24/99 to 6/25/99 <br /> 3939 Cambridge Road,Ste.202 Project Number: N/A Received: 6/25/99 <br /> Cameron Park,CA 95682 Project Manager: Mark Capps Reported: 7/11/99 <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 /> PL-6(5') 5206437-01 SAW <br /> Tert-butyl alcohol 9070010 7/1/99 7/8/99 100 ND mg/kg D <br /> Methyl tert-butyl ether 1.00 88.9 " <br /> Di-isopropyl ether „ D <br /> 1.00 ND D <br /> Ethyl tert-butyl ether 1.00 ND D <br /> Tert-amyl methyl ether 1.00 ND D <br /> Ethanol 1500 ND D <br /> Surrogate: 1,2-DCA-d4 60.0-140 92.8 / D <br /> PL-7 151 S206437-02 SAH <br /> alcohol 9070010 7/1/99 7/8/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether <br /> 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND " <br /> Ethanol <br /> " <br /> Surrogate: I,2-DCA-d4 150 ND60.0-140 91.6 <br /> PL-8(5') 5906437-03 veil <br /> Tert-butyl alcohol 9070010 7/]/99 7/8/99 10.0 ND mg/kg <br /> Methyl tett-butyl ether 0.100 0.]14 " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND <br /> Tert-amyl methyl ether <br /> Ethanol <br /> 0.100 ND " <br /> �� �� <br /> " <br /> Surrogate: 1,2-DCA 150 ND-d4 60.0-1400 <br /> 85.6 % <br /> PL-9(5') S906437-04 SAW <br /> alcohol 9070010 7/1/99 7/8/99 10.0 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 /> Ethanol <br /> " <br /> Surrogate. 1,2-DCA-d4 150 ND60.0-140 88.4 % <br /> PL-10(51 S906437-05 S4i1 <br /> Tert-butyl alcohol 9070010 7/1/99 7/8/99 20.0 ND mg/kg D <br /> Methyl tett-butyl ether 0.200 19.6 " <br /> Di-isopropyl ether D <br /> �� �� 0.200 ND " <br /> Ethyl tert-butyl ether " D <br /> �� �� 0.200 ND " <br /> Tert-amyl methyl ether " D <br /> 0.200 ND " <br /> D <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 7 of 16 <br />