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819 Striker Avenue.Suite 8 <br /> Sequoia Sacram{9 o.CA 95834 <br /> 6)921-9600 <br /> FAX(916)92 t-0100 <br /> Analytical rv-,%w.seqUoia1abs.CJDm <br /> wo - <br /> SECOR International-Rancho Cordova Project: ARCO 4493,Stockton,CA Sampled: 6119/00 <br /> 3017 Kilgore Road,Suite 100 Project Number: NIA Received: 6/23/00 <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 RPD <br /> lAnalyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> LCS 0060255-BSI <br /> Benzene 6127100 50.0 47.0 ug/1 60.0-140 94.0 <br /> Chlorobenzene 50.0 50.0 60.0-140 100 <br /> 1,1-Dichloroethene 50.0 50.8 60.0-140 102 <br /> Toluene 50.0 50.2 60.0-140 100 <br /> Trichloroethene 50.0 46.4 60.0-140 92.8 <br /> Surrogate: DibromoJluoromethane 50.0 56.6 i% 60.0-140 113 <br /> Surrogate: 1,2-DCA-d4 50.0 64.6 60.0-140 129 <br /> Surrogate: Toluene-d8 50.0 51.4 60.0-140 103 <br /> Surrogate: 4-BFB 50.0 50.2 60.0-140 100 <br /> LCS Dun 0060255-BSD1 <br /> Benzene 6127100 50.0 48.0 ug/l 60.0-140 96.0 25.0 2.11 <br /> C benzene 50.0 52.4 60.0-140 105 25.0 4.88 <br /> I, hlaroethene 50.0 51.4 60.0-140 103 25.0 0.976 <br /> To ne 50.0 51.4 60.0-140 103 25.0 2.96 <br /> Trichloroethene _ _ 50.0 46.8 _60.0-140 93.6 25.0 0.858 <br /> Surrogate: Dibromofluoromethane 50.0 55.8 60.0-140 112 <br /> Surrogate: 1,2-DCA44 50.0 65.4 60.0-140 131 <br /> Surrogate: Toluene-d8 50.0 53.4 60.0-140 107 <br /> Surrogate: 4-BFB to 50.0 50.6 60.0-140 101 <br /> Matrix Spike 0060255-MSI 5006211-01 <br /> 46.8 ugll 60.0-140 93.6 <br /> Berne 6127100 50.0 ND <br /> Chlorobenzene <br /> 50,0 ND 51.4 60.0-140 103 <br /> 1,1-Dichloroethene 50.0 ND 51.6 60.0-140 103 <br /> Toluene 50.0 ND 49.8 60.0-140 99.6 <br /> Trichloroethene 50.0 ND 46.0 60.0-140 92.0 <br /> Surrogate: Dibromo luoromethane 50.0 60.2 60.0-140 120 <br /> Surrogate: 1,2-DCA-d4 50.0 69.2 60.0-140 138 <br /> Surrogate: Toluene-d8 <br /> " 50.0 52.4 60.0-140 105 <br /> Surrogate: 4-BFB 50.0 52.4 60.0-140 105 <br /> Matrix Soike Dao 0060255-MSD1 S006211-01 <br /> ug/1 60.0-140 94.0 25.0 0.426 <br /> Bene 6127100 50.0 ND 47.0 <br /> Chlorobenzene 50.0 ND 51.4 60.0-140 103 25.0 0 <br /> 1,1-Dichloroethene 50.0 ND 52.8 60.0-140 106 25.0 2.87 <br /> Toluene 50.0 ND 50.4 60.0-140 101 25.0 1.40 <br /> Trichloroethene 50.0 ND 45.6 _ 60.0-140 91.2 _25.0 0.873 _ <br /> Surrogate: Di6romo1luoromethane 50.0 59.6 60.0-140 119 <br /> Surro ate: 1,2-DCA-d4 50.0 67.6 60.0-140 135 <br /> Ste: Toluene-d8 50.0 52.2 60.0-140 104 <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for test of notes and definitions. <br /> Page 22 of 26 <br /> �c <br />