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Sequoia 819 Striker Avenue,Suite 8 Sacramento,CA 95834 Analytical �„f 45) (916)921-9600 FAX(916)921-0 100 Delta Environmental Consultants Project: Arco 2130,Stockton,CA Sampled: 9/28/99 3164 Gold Camp Drive,Ste.200 Project Number: N/A Received: 9/29/99 Rancho Cordova,CA 95670 Project Manager: Ben Heningburg Reported: 9/30/99 Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUFT Sequoia Analytical-Sacramento Batch Date Date Surrogate Reporting Analyte Number Prepared Analyzed Limits Limit Result Units Notes* DP-1-3.5 S909414-01 Soil Purgeable Hydrocarbons 9090335 9/30/99 9/30/99 1.00 ND mg/kg Benzene 0.00500 ND " Toluene 0.00500 ND " Ethylbenzene 0.00500 ND " Xylenes(total) 0.00500 ND Surrogate: a,a,a-Tris luorotoluene 60.0-140 96.0 % DP-2-3.5 S909414-02 Soil Purgeable Hydrocarbons 9090335 9/30/99 9/30/99 1.00 ND mg/kg Benzene 0.00500 ND Toluene 0.00500 ND " Ethylbenzene 0.00500 ND " Xylenes(total) 0.00500 ND " Surrogate: a,a,a-Trifluorotoluene 60.0-140 93.5 % DP-3-3.5 S909414-03 Soil Purgeable Hydrocarbons 9090335 9/30/99 9/30/99 1.00 ND mg/kg Benzene 0.00500 ND " Toluene 0.00500 ND Ethylbenzene 0.00500 ND " Xylenes(total) 0.00500 ND " Surrogate: a,a,a-Trifluorotoluene 60.0-140 90.0 % DP4-3.5 S909414-04 Soil Purgeable Hydrocarbons 9090335 9/30/99 9/30/99 1.00 ND mg/kg Benzene 0.00500 ND " Toluene 0.00500 ND " Ethylbenzene 0.00500 ND " Xylenes(total) 0.00500 ND Surrogate: a,a,a-Trifluorotoluene 60.0-140 86.5 % PL-1-3.5 S909414-05 Soil Purgeable Hydrocarbons 9090335 9/30/99 9/30/99 1.00 ND mg/kg Benzene 0.00500 ND " Toluene 0.00500 ND " Ethylbenzene 0.00500 ND " Xylenes(total) 0.00500 ND " Surrogate: a,a,a-Triuorotoluene 60.0-140 105 % PL-2-3.5 S909414-06 Soil Purgeable Hydrocarbons 9090336 9/30/99 9/30/99 1.00 ND mg/kg Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. Page 2 of 11