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Sequoia 819 Striker Avenue.Suite 8 <br /> 4D- Sacramento,CA 95834 <br /> (916)921-9600 <br /> 4VAnalytical FAX(916) 921-0100 <br /> SECOR Intemational Project: ARCO 4493,Stockton,CA Sampled: 6/17/99 <br /> 9912 Business Park Drive,Ste. 100 Project plumber: 70600-604-02 Received: 6/17/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Bcnkosky Reported: 7/6/99 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> MW4 5206315A4 Water <br /> Benzene 9060372 6/24/99 6/24/99 10.0 230 ug/l D <br /> Bromobenzene 10.0 ND D <br /> Bromochloromethane 10.0 ND D <br /> Bromodichloromethane 10.0 ND D <br /> Bromofonn 10.0 ND D <br /> Bromomethane 25.0 ND D <br /> n-Butylbenzene 10.0 40.4 D <br /> sec-Butylbenzene 10.0 14.3 D <br /> tert-Butylbenzene 10.0 ND D <br /> Carbon tetrachloride 10.0 ND D <br /> Chlorobenzene 10.0 ND D <br /> Chloroethane 25.0 ND D <br /> Chloroform 10.0 ND D <br /> 4 omethane 25.0 ND D <br /> orotoluene 10.0 ND D <br /> 4-Chlorotoluene 10.0 ND D <br /> Dibromochloromethane 10.0 ND D <br /> 1,2-Dibromoethane 10.0 ND D <br /> Dibromomethane 10.0 ND D <br /> 1,2-Dibromo-3-chloropropane 25.0 ND D <br /> 1,2-Dichlorobenzene 10.0 ND D <br /> 1,3-Dichlorobenzene 10.0 ND D <br /> 1,4-Dichlorobenzene 10.0 ND D <br /> Dichlorodifluoromethane 25.0 ND D <br /> 1,1-Dichloroethane 10.0 ND D <br /> 1,2-Dichloroethane 10.0 ND D <br /> 1,1-Dichloroethene 10.0 ND D <br /> cis-1,2-Dichloroethene 10.0 67.6 D <br /> trans-1,2-Dichloroethene 10.0 ND D <br /> 1,2-Dichloropropane 10.0 ND D <br /> 1,3-Dichloropropane 10.0 ND D <br /> 2,2-Dichloropropane 10.0 ND D <br /> I,I-Dichloropropene 10.0 ND D <br /> Ethylbenzene 10.0 597 D <br /> 1-lexachlorobutadiene 10.0 ND D <br /> Isopropylbenzene 10.0 47.2 D <br /> p-Isopropyltoluene 10.0 ND D <br /> Methylene chloride 25.0 ND D <br /> Naphthalene 25.0 372 " D <br /> n-Propylbenzene 10.0 179 D <br /> W-e " " 10.0 ND D <br /> Sequoia Analytical -Sacramento *Refer to end of report for text of notes and def nitions. <br /> Page 9 of 21 <br /> z�i <br />