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819 Striker Avenue.Suite 8 <br /> enta.CA5834 <br /> Sequoia swam(9 1 6)921-99600 <br /> 4DFAX(916)921-0100 <br /> www.sequoialabs.com <br /> wwsequoialabs.com <br /> SECOR International-Rancho Cordova Project: ARCO 4493, Stockton,CA Sampled: 6/19/00 <br /> 3017 Kilgore Road,Suite 100 Project Number: NIA Received: 6123100 <br /> Rancho Cordova,CA 95670 Pro-ect Manager- Rusty Benkosky Reported. 716100 <br /> Volatile Organic Compounds by ERA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPU RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> Blank continued 0060255-BLK2 <br /> 1,2-Dibromo-3-chloropropane 6128100 ND ug/1 5.00 <br /> 1,2-Dichlorobenzene ND 2'00 <br /> 1,3-Dichlorobenzene ND 2.00 <br /> 1,4-Dichlorobenzene ND 2.00 <br /> Dichlorodifluoromethane ND 5.00 <br /> 1,1-Dichloroethane ND 2.00 <br /> 1,2-Dichloroethane ND 2.00 <br /> 1,1-Dichloroethene ND 2.00 <br /> cis-1,2-Dichloroethene ND 2.00 <br /> trans-1,2-Dichloroethene ND 2.00 <br /> 1,2-Dichloropropane ND 2.00 <br /> 1,3-Dichloropropane ND 2.00 <br /> 2,2-Dichloropropane ND 2.00 <br /> 14&hloropropcne ND 2.00 <br /> Eenzene " ND 2.00 <br /> Hexachlorobutadiene ND 2.00 <br /> Isopropylbenzene ND 2.00 <br /> p-isopropyltoluene ND 2.00 <br /> Methylene chloride ND 5.00 <br /> Naphthalene ND 5.00 <br /> n-Propylbenzene ND 2.00 <br /> Styrene " ND <br /> 2.00 <br /> 1,1,1,2-Tetrachloroethane ND 2.00 <br /> 1,1,2,2 Tetrachloroethane ND 2.00 <br /> Tcawhloroethene ND 2.00 <br /> Toluene " ND 2.00 <br /> 1,2,3-Trichlorobenzene it ND 2.00 <br /> 1,2,4Trichlorobenzcne <br /> ND 2.00 <br /> 1,1,1 Trichloroethane ND 2.10 <br /> �+ <br /> 1,1,2-Trichloroethane ND 2.00„ <br /> Trichloroethene ND 2.00 <br /> ND " 5.00 <br /> Trichlorofluoromethane " <br /> 1,2,3-Trichloropropane ND 2.00 <br /> 1,2,4-Trimethylbenzene ND 2.00 <br /> " <br /> ND 2.00 <br /> 1,3,5-Trimethylbenzene <br /> 2.00 <br /> Vinyl chloride ND „ <br /> Total Xylenes - -. �. -- - ND 2.00 <br /> - - - - - <br /> Surrogate: Dibromofluoromethane 50.0 52.0 60.0-140 104 <br /> Surrogate: 1.2-DCA44 50.0 54.2 I 60.0-140 108 <br /> Surrogate: Toluene-d8 50.0 51.2 60.0-140 102 <br /> SO te.- 4-BFB 50.0 48.0 60.0-I40 96.0 <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for text of notes and definitions. <br /> Page 21 of 26 <br />