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819 Striker Avenue.Suite 8 <br /> Sacramento.CA 95834 <br /> Sequoia (916)921-9600 <br /> FAX(916)921-0 100 <br /> Analytical ,rvw w.sequoialabs.corn <br /> SECOR International-Rancho Cordova Project: ARCO 4493,Stockton,CA Sampled: 6/19100 <br /> 3017 Kilgore Road,Suite 100 Project Number: NIA Received: 6123/00 <br /> Rancho Cordova,CA 95670 Project Manager: Rusty Benkosky 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 =�/. Notes* <br /> Anal e Analyzed Level Result Result Units Recov. Limits % Limit <br /> Blank(continued) 0060286-BLK1 <br /> Methylene chloride 6129100 NB ug/l 5.00 <br /> Naphthalene ND 5.00 <br /> n-Propylbenzene ND 2.00 <br /> Styrene „ ND 2.00 <br /> 1,1,1,2-Tetrachloroethane ND 2'00 <br /> 1,1,2,2-Tetrachloroethane ND 2.00 <br /> Tetrachloroethene PID 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-Trichlaroethane ND 2.00 <br /> T ' roethene ND " 2.00 <br /> rofluoromethane ND 5.00 <br /> 1,2, -Trichloropropane ND 2.00 <br /> ND 2.00 <br /> 1,2,4-Trimethylbenzene <br /> 1,3,5-Trimethylbenzene ND 2.00 <br /> Vinyl chloride ND 2.00 <br /> 2.00 <br /> Total Xylenes _ - - - ----- ND - -- _----- -- <br /> Surrogate: Dibromofiuoromethane 50.0 49.4 70.0-130 03 <br /> Surrogate: 1,2-DCA-d4 50.0 51.4 70.0-130 103 103 <br /> 07 <br /> Surrogate: Toluene-d8 50.0 53.4 70.0-130 <br /> Surrogate: 4-BFB 50.0 49.4 70.0-130 988.8.8 <br /> LICS 0060286-BSI <br /> Benzene 6/29/00 50.0 53.6 ug/ <br /> 70.0-130 107 <br /> Chlorobenzene <br /> " 50.0 51.8 70.0-130 104 <br /> 1,1-Dichloroethene 50.0 45.0 70.0-130 94.0 <br /> Toluene 50.0 54.4 70.0-130 109 <br /> _Trichloroethene _ 50.0 -_ _ 53.2 _ " - 70.0-130_ 106 <br /> Dior -- <br /> Surrogate: bromofluomethane _ 50-0 49.0 70.0-130 98.0 <br /> Surrogate: 1,1-DCA-d4 50.0 52.8 70.0-130 106 <br /> Surrogate: Toluene-d8 50.0 52.8 70.0-130 106 <br /> Surrogate: 4-BFB 50.0 50.4 70.0-130 101 <br /> LCS Dup 0060286-BSD1 <br /> ugll 70.0-130 103 25.0 3.81 <br /> Benzene 6129100 50.0 51.6 <br /> Chlorobenzene " <br /> 50.0 50.8 70.0-130 102 25.0 1.94 <br /> 1,1-Dichloroethene 50.0 44.4 70.0-130 88.8 25.0 1.34 <br /> T ne 50.0 50.6 70.0-130 101 25.0 7.62 <br /> roethene 50.0 50.2 70.0-130 100 25.0 5.83 <br /> Sequoia Analytical-Sacramento *Refer to end of report for teat of notes and definitions. <br /> Page 24 of 26 <br />