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a <br /> Sequoia 819 Striker Avenue, Suite 8 <br /> Sacramento, CA 95834 <br /> (916) 921-9100 <br /> Analytical <br /> FAX(916) 921-0100 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 6/17/99 <br /> 9912 Business Park Drive, Ste. 100 Project Number: 7G600-604-02 Received: 6/17/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 7/6/99 <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(continugri) ".6 72-8LK1 <br /> Methylene chloride 6/24/99 ND ug/l 5.00 <br /> Naphthalene ND 5.00 <br /> n-Propylbenzene ND 2.00 <br /> Styrene ND 2.00 <br /> t,1,1,2-Tetrachloroethane ND " 2.00 <br /> 1,1,2,2-Tetrachloroethane ND 2.00 <br /> Tetrachieroethene ND 2.00 <br /> Toluene ND 2.00 <br /> 1,2,3-Trichlorobenzene ND 2.00 <br /> 1,2,4-Trichlorobenzene ND " 2.00 <br /> 1,1,1-Trichloroethane ND 2.00 <br /> 1,1,2-Trichloroethane ND 2.00 <br /> Trichloroethene ND 2.00 <br /> rofiuoromethane ND 5.00 <br /> Wrichloropropane <br /> ND 2.00 <br /> 1,2,4-Trimethylbenzene ND " 2.00 <br /> 1,3,5-Trimethylbenzene ND " 2.00 <br /> Vinyl chloride " ND " 2.00 <br /> Total Xylenes ND " 2.00 <br /> Surrogate: Dibromofluoromethane 50.0 50.6 70.0-130 101 <br /> Surrogate: 1,2-DCA-d4 50.0 49.8 70.0-130 99.6 <br /> Surrogate: Toluene-d8 50.0 52.2 70.0-130 104 <br /> Surrogate: 4-BFB 50.0 39.6 70.0-130 79.2 <br /> 1..CS 20610372-BS 1 <br /> Benzene 6/24/99 50.0 49.2 ug/l 70.0-130 98.4 <br /> Chlorobenzene 50.0 50.0 70.0-130 100 <br /> 1,1-Dichloroethene 50.0 46.8 70.0-130 93.6 <br /> Toluene 50.0 52.0 70.0-130 104 <br /> Trichloroethene 50.0 46.4 70.0-130 92.8 <br /> Surrogate: Dibromofluoromethane 50.0 49.2 70.0-130 98.4 <br /> Surrogate., 1,2-DCA-d4 50.0 49.4 70.0-130 98.8 <br /> Surrogate: Toluene-d8 50.0 51.8 70.0-130 104 <br /> Surrogate: 4-BFB 50.0 41.0 70.0-130 82.0 <br /> LCS Dua 206110372-BSD1 <br /> Benzene 6/24/99 50.0 49.0 ug/1 70.0-130 98.0 25.0 0.407 <br /> Chlorobenzene 50.0 50.0 70.0-130 100 25.0 0 <br /> 1,1-Dichloroethene 50.0 46.8 70.0-130 93.6 25.0 0 <br /> Toluene 50.0 51.6 70.0-130 103 25.0 0.966 <br /> Aoellenc 50.0 46.8 70.0-130 93.6 25.0 0.858 <br /> Sequoia Analytical -Sacramento "Refer to end of report for lext of notes and definitions. <br /> Page 17 of 21 <br />