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Sequoia 819 Striker Avenue, Suite 8 <br /> 4D Sacramento,CA 95834 <br /> (916) 921-9600 <br /> Analytical FAX(916)92 1-0100 <br /> r <br /> F <br /> COR International Project: ARCO 4493,Stockton,CA Sampled: 6/17/99 <br /> 12 Business Park Drive,Ste. 100 Project Numbei. 7G600-604-02 Received: 6/17/99 <br /> cramento,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(continged) 9060306-BLKI <br /> Styrene 6/21/99 ND ug/l 2.00 <br /> 1,1,1,2-Tetrachloroethane ND 2.00 <br /> 1,1,2,2-Tetrachloroethane ND 2.00 <br /> Tetrachloroethane 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 /> Trichlorofluoromethane ND 5.00 <br /> 1,2,3-Trichloropropane ND 2.00 <br /> 1,2,4-Trimethylbenzene ND 2.00 <br /> � <br /> Trimethylbenzene " ND 2.00 <br /> chloride ND 2.00 <br /> Total Xylenes 2.86 2.00 <br /> Surrogate: Dibromofluoromethane 50.0 52.2 70.0-130 104 <br /> Surrogate: 1,2-DCA-d4 50.0 52.2 70.0-130 104 <br /> Surrogate: Toluene-d8 50.0 52.0 70.0-130 104 <br /> Surrogate: 4-BFB 50.0 48.2 70.0-130 96.4 <br /> LCS 9060306-BSI <br /> Benzene 6/21/99 50.0 49.4 ug/l 70.0-130 98.8 <br /> Chlorobenzene 50.0 50.8 70.0-130 102 <br /> 1,1-Dichloroethene 50.0 40.8 70.0-130 81.6 <br /> Toluene 50.0 49.0 70.0-130 98.0 <br /> Trichloroethene 50.0 46.8 70.0-130 93.6 <br /> Surrogate: Dibromofluoromethane 50.0 53.6 70.0-130 107 <br /> Surrogate: 1,2-DCA-d4 50.0 54.8 70.0-130 110 <br /> Surrogate: Toluene-d8 50.0 51.0 70.0-130 102 <br /> Surrogate., 4-BFB 50.0 48.6 70.0-130 97.2 <br /> LCSDu 12 9060306-5SD1 <br /> Benzene 6/21/99 50.0 48.0 ug/l 70.0-130 96.0 25.0 2.87 <br /> Chlorobenzene 50.0 49.6 70.0-130 99.2 25.0 2.78 <br /> I,I-Dichloroethene 50.0 38.8 70.0-130 77.6 25.0 5.03 <br /> Toluene 50.0 47.8 70.0-130 95.6 25.0 2.48 <br /> Trichloroethene 50.0 45.6 70.0-130 91.2 25.0 2.60 <br /> Surrogate: Dibromofluoromethane 50.0 51.6 70.0-130 103 <br /> Surrogate: 1,2-DCA-d4 50.0 52.4 70.0-130 105 <br /> S ate: Toluene-d8 50.0 50.6 70.0-130 101 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 15 of 2l <br />