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Sequoia Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364.9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue.Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)971-0100 <br /> qQF Analytical 1455 McDowell Blvd.North.Ste. D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> a <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2/16/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: NIA Received- 2/17/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 313199 <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 /> 111,`llak(continuedl 9020207-BLKI <br /> Styrene 2118199 ND ug/I 2.00 <br /> l,1,1,2-Tetrachloroethane ND 2.00 <br /> 1,1,2,2-Tetrachloroethane ND 2.00 <br /> Tetrachloroethene 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 /> Trimethylbenzene ND ;i 2.00 <br /> t chloride ND 2.00 <br /> otal Xylenes ND 2.00 <br /> Surrogate: Dibromofluoromethane 50.0 50.6 70.0-130 101 <br /> Surrogate: 1,1-DCA-d4 50.0 50.2 70.0-130 100 <br /> Surrogate: Toluene-d8 50.0 49.6 70.0-130 99.2 <br /> Surrogate: 4-BFB 50.0 44.2 70.0-130 88.4 <br /> LCS 9020207-BS1 <br /> Benzene 2/18/99 50.0 51.2 ug/1 70.0-130 102 <br /> Chlorobenzene 50.0 52.0 70.0-130 104 <br /> 1,1-Dichloroethene 50.0 55.6 70.0-130 111 <br /> Toluene 50.0 52.4 70.0-130 105 <br /> Trichloroethene 50.0 45.0 70.0-130 90.0 <br /> Surrogate: Dibromofluoromethane 50.0 55.0 70.0-130 110 <br /> Surrogate: 1,2-DC.444 50.0 55.6 70.0-130 111 <br /> Surrogate: Toluene-d8 50.0 51.8 70.0-130 104 <br /> Surrogate: 4-BFB 50.0 45.2 70.0130 90.4 <br /> Matrix Spike 9020207-MS1 S902230-01 <br /> Benzene 2/18/99 50.0 ND 51.4 ug/I 60.0-140 103 <br /> Chlorobenzene 50.0 ND 50.2 60.0-140 100 <br /> 1,1-Dichloroethene 50.0 ND 53.6 60.0-140 107 <br /> Toluene 50.0 ND 50.2 60.0-140 100 <br /> Trichloroethene 50.0 ND 44.0 60.0-140 88.0 <br /> Surrogate: Dibromofluoromethane 50.0 53.6 70.0-130 107 <br /> Surrogate: 1,2-DCA-d4 50.0 52.6 70.0-130 105 <br /> rrogate: Toluene-d8 50.0 50.0 70.0-130 100 <br /> quoia Analytical -Sacramento *Refer to end of report for text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 14 of 20 <br />