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laboratories <br /> Ground Zero Analysis,Inc. Project Number: 781 <br /> 1714 Main Street Project Name: West Coast Tomato Work Order No.: <br /> Escalon,CA 95320 Project Manager: Greg Stahl L102015 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Argon Laboratories <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch L100230-EPA 5030B <br /> Blank(L100230-BLK1) Prepared&Analyzed:02/10/11 <br /> Surrogate:Fluorobenzene 47.0 ug/L 50 94 70-130 <br /> Benzene ND 0.5 " <br /> Toluene ND 0.5 " <br /> Xylenes,total ND 1.0 " <br /> Ethylbenzene ND 0.5 " <br /> t-Butanol ND 5.0 " <br /> Methyl tert-Butyl Ether ND 0.5 " <br /> Di-Isopropyl Ether ND 0.5 " <br /> Ethyl tert-Butyl Ether ND 0.5 " <br /> tert-Amyl Methyl Ether ND 0.5 " <br /> 1,2-Dichloroethane ND 0.5 " <br /> 1,2-Dibromoethane(EDB) ND 0.5 " <br /> LCS(L100230-BSI) Prepared&Analyzed:02/10/11 <br /> 1,2-Dichloroethane 25.8 ug/L 25 103 80-120 <br /> LCS Dup(L100230-BSDI) Prepared&Analyzed:02/10/11 <br /> 1,2-Dichloroethane 26.0 ug/L 25 104 80-120 0.8 20 <br /> Matrix Spike(L100230-MS1) Source:L102015-05 Prepared&Analyzed:02/10/11 <br /> Toluene 28.2 ug/L 25 ND 113 70-130 <br /> Matrix Spike Dup(L100230-MSDI) Source:L102015-05 Prepared&Analyzed:02/10/11 <br /> Toluene 28.1 ug/L 25 ND 112 70-130 0.4 20 <br /> Appi aved By <br /> Argc n Laboratories,Inc. CaliforniaD.O.H.S.Cert.#2359 <br /> 2905 Railroad Rvenue, Ceres, CR 95307 • Phone (209) 581-9280 fax (209) 581-9282 <br /> email: main@argonlabs.com Page 9 of 10 <br />