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GeoAnal tical Laboratorie 'l <br /> y s, n c. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209)572-0900 Fax (209)572-0916 <br /> Report# Q289-01 QC REPORT <br /> San Joaquin County Environmental Health Dates Analyzed 10/18/04 <br /> 304 E.Weber 3rd Floor <br /> Stockton CA 95202 <br /> LCS MS % MSD % RPD Blank <br /> Analyte Batch # Method %Recovery Recovery Recovery <br /> MTBE V00386 8260B 97.7 21.0 240.0 167.8 ND <br /> 1,1-Dichlorothane 116.0 109.0 113.0 3.6 ND <br /> Benzene 114.0 106.0 110.0 3.7 ND <br /> Trichloroethene 113.0 111.0 113.0 1.8 ND <br /> Toluene 112.0 105.0 108.0 2.8 ND <br /> Chlorobenzene 109.0 98.9 106.0 6.9 ND <br /> Comments: <br /> MTBE spike analyte is outside stated control limits, LCS within limits <br /> C,c, Vr <br /> ario D'Onofrio Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />