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819 Striker Avenue,Suite 8 <br /> Sacramento.CA 958M <br /> ` S e u o i a (916)921-9600 <br /> FAX(9t6)921-0100 <br /> Analytical www.sequolalabs.com <br /> SECOR International-Rancho Cordova Project: ARCO 4493, Stockton,CA Sampled: 6119100 <br /> 3017 Kilgore Road,Suite 100 Project Number: N/A Received: 6/23/00 <br /> Rancho Cordova,CA 95670 Project Manager: Rusty Benkosky Reported: 7/6/00 <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 % Notcs* <br /> LCS❑up(continued) 0060286-BSD1 <br /> Surrogate: Dibromofluoromethane 6/29/00 50.0 48.8 ug/1 70.0-130 97.6 <br /> Surrogate: 1,2-DCA-d4 50.0 52.8 70.0-130 106 <br /> Surrogate: Toluene-d8 50.0 51.2 70.0-130 102 <br /> Surrogate: 4-BFB 50.0 48.0 70.0-130 96.0 <br /> Matrix Spike 0060286-MSI 5006320-05 <br /> Benzene 6/29/00 50.0 2.06 52.2 ug/I 60.0-140 100 <br /> Chlorobenzene 50.0 ND 51.2 60.0-140 102 <br /> l,l-Dichloroethene 50.0 ND 43.4 60.0-140 86.8 <br /> Toluene 50.0 ND 49.8 60.0-140 99.6 <br /> Trichloroethene 50.0 20.2 71.0 60.0-140 102 <br /> Surrogate: Dibromofluoromethane 50.0 49.8 70.0-130 99.6 <br /> Sur ate: 1,2-DCA-d4 50.0 53.8 70.0-130 108 <br /> S Ie: Toluene-d8 50.0 51.6 70.0-130 103 <br /> Sur gate: 4-BFB 50.0 47.6 70.0-130 95.2 <br /> Matrix Spike Dup 0060286-MSD/ 5006320-05 <br /> Benzene 6/29/00 50.0 2.06 54.0 ug/I 60.0-140 104 25.0 3.92 <br /> hlorobenzene 50.0 ND 53.0 60.0-140 106 25.0 3.85 <br /> C <br /> hlDichloroethene 50.0 ND 45.4 60.0-140 90.8 25.0 4.50 <br /> Toluene 50.0 ND 52.0 60.0-140 104 25.0 4.32 <br /> 73.4 __ _ 60.0-140_ 106 _25.0 3.85 <br /> Trichloroethene 50.0 - -20.2 <br /> Surrogate: Dibromofluoromethane 50.0 52.6 70.0-130 105 <br /> Surrogate: 1,2-DCA-d4 50.0 56.4 n 70.0-130 113 <br /> Surrogate: Toluene-d8 50.0 54.8 70.0-130 110 <br /> Surrogate: 4-BFB 50.0 50.0 70.0-130 100 <br /> 0 *Refer to end ofreport for text of notes and definitions. <br /> Sequoia Analytical-Sacramento <br /> Page 25 of 26 <br />