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819 Striker Avenue.Suite 8 <br /> Sacramento.CA 95834 <br /> Sequoia (916)921-9600 <br /> 4,!D FAX(916)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: NIA Received: 6123100 <br /> Rancho Cordova,CA 95670 Project Manager: Rusty Benkosk Reported: 716100 <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 0060255-BLKI <br /> Styrene 6/27/00 ND ugll 2.00 <br /> 1,1,1,2-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-Triehlorobenzene ND 2.00 <br /> 1,2,4-Triehlorobenzene 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, rimethylbenzene ND ii 2.00 <br /> !, rimethylbenzene ND 2.00 <br /> V <br /> in chloride 0ND 2.00 <br /> Total Xylenes _ _ _ _ ND - - - _2.00 <br /> Surrogate: Dibromofluoromethane 50.0 55.8 60.0-140 112 <br /> Surrogate: 1,2-DCA-d4 50.0 64.0 60.0-140 128 <br /> Surrogate: Toluene-d8 50.0 54.2 ry' 60.0-140 108 <br /> Surrogate: 4-BFB 50.0 52.0 60.0-140 104 <br /> !>tnk 0060255-BLK2 <br /> X8/00 ND ug/l 2.00 <br /> Benzene <br /> Bromobenzene ND 2.00 <br /> Bromochloromethane " ND " 2.00 <br /> Bromodichloromethane ND 2.00 <br /> Bromoform ND 2.00 <br /> Bromomethane ND 5.00 <br /> n-Butylbenzene ND 2.00 <br /> sec-Butylbenzene ND 2.00 <br /> tett-Butylbenzene ND 2.00 <br /> Carbon tetrachloride ND „ 2.00 <br /> Chlorobenzene ND 2.00 <br /> Chloroethane ND 5.00 <br /> Chloroform ND 2.00 <br /> Chloromethane ND 5.00 <br /> 2-Chlorotoluene ND 2.00 <br /> 4-Chlorotoluene ND 2.00 <br /> Dibromochloromethane ND 2.00 <br /> ;Womethane <br /> romoethane ND 2.00 <br /> ND 2.00 <br /> Sequoia Analytical-Sacramento "Refer to end of report for test of notes and definitions. <br /> Page 20 of 26 <br />