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680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 4D Sequoia 404 N.Wiget lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> $19 Striker Avenue.Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> I%ff Analytical 1455 McDowell Blvd. North.Ste. D Petaluma,CA 94954 (707) 792-1865 FAX(707)7920342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> 40 <br /> SECOR International Project: ARCO 4493, Stockton,CA Sampled: 2/10199 to 2/12/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: NIA Received: 3/4/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/10/99 <br /> Volatile Organic Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> Blank(continued) 9020258-RLIC1 <br /> Trichlorofluoromethane 2/22/99 ND ug/kg 500 <br /> 1,2,3-Trichloropropane ND I00 <br /> 1,2,4-Tri methyl benzene ND 100 <br /> 1,3,5-Tri methyl benzene ND 100 <br /> Vinyl chloride ND 500 <br /> Total Xylenes ND 100 <br /> Surrogate: Dibromofluoromethane 2500 2650 70.0-130 106 <br /> Surrogate: 1,2-DCA-d4 2500 2720 70.0-130 109 <br /> Surrogate: Toluene-d8 2500 2620 70.0-130 105 <br /> Surrogate: 4-BFB 2500 2350 70.0-130 94.0 <br /> LCS 9920258-1351 <br /> Benzene 2/22/99 2500 2720 ug/kg 70.0-130 109 <br /> 0 orobenzene " 2500 2420 70.0-130 96.8 <br /> Dichloroethene 2500 2340 70.0-130 93.6 <br /> oluene 2500 2480 70.0-130 99.2 <br /> Trichloroethene 2500 2200 70.0-130 88.0 <br /> Surrogate: Dibronzofluoromethane 2500 2670 70.0-130 107 <br /> Surrogate: 1,2-DCA-d4 2500 2750 70.0-130 110 <br /> Surrogate: Toluene-d8 2500 2570 70.0-130 103 <br /> Surrogate., 4-BFB 2500 2350 70.0-130 94.0 <br /> Matrix Spike 9020258-MS1 5902287-11 <br /> Benzene 2/22199 2500 ND 2450 ug/kg 60.0-140 98.0 <br /> Chlorobenzene 2500 ND 2200 60.0-140 88.0 <br /> I,I-Dichloroethene 2500 ND 2200 60.0-140 88.0 <br /> Toluene 2500 ND 2230 60.0-140 89.2 <br /> Trichloroethene 2500 ND 1940 60.0-140 77.6 <br /> Surrogate: Dibronzofluoromethane 2500 2500 70.0-130 100 <br /> Surrogate: 1,2-DCA-d4 2500 2570 70.0-130 103 <br /> Surrogate: Toluene-d8 2500 2290 70.0-130 91.6 <br /> Surrogate: 4-BFB 2500 2100 or 70.0-130 84.0 <br /> Matrix Spike Dun 9020258-MSD1 5902287-11 <br /> Benzene 2/22/99 2500 ND 2410 ug/kg 60.0-140 96.4 25.0 1.65 <br /> Chlorobenzene 2500 ND 2180 60.0-140 87.2 25.0 0.913 <br /> 1,1-Dichloroethene 2500 ND 2070 60.0-140 82.8 25.0 6.09 <br /> Toluene 2500 ND 2220 60.0-140 88.8 25.0 0.449 <br /> Trichloroethene 2500 ND 1910 60.0-140 76.4 25.0 1.56 <br /> Surrogate: Dibromofluoromethane 2500 2390 70.0-130 95.6 <br /> ,SurroRate: 1,2-DCA-d4 2500 2470 70.0-130 98.8 <br /> -75quoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 27 of 29 <br />