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Quality Assurance Report <br /> MTBE by GC/MS In Water <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch B000882-EPA 5030 GC/MS <br /> Blank(B000882-BLK1) Prepared&Analyzed 04/07/06 <br /> Methyl tert-Butyl Ether (MTBE) ND 10 ug/L <br /> Surrogate DibromoJluoromethane 203 leg/L 200 102 70-130 <br /> Surrogate Toluene-d8 198 ug1L 200 99 70-130 <br /> Surrogate 4-Bromofluorobenzene 208 leg/L 200 104 70-130 <br /> Matrix Spike(B000882-MSI) Source 6040708-01 Prepared&Analyzed 04/07/06 <br /> 1,1-Dichloroethene(1,1-DCE) 253 1 0 µg/L 250 ND 101 70-130 <br /> Benzene 253 1 0 1tg/L 250 ND 101 70-130 <br /> Trichloroethene(TCE) 252 1 0 µg/L 250 ND 101 70-130 <br /> Toluene 255 1 0 µg/L 25 0 ND 102 70-130 <br /> Chlorobenzene 244 1 0 µg/L 250 ND 98 70-130 <br /> • Surrogate DibromofluorometMane 201 leg/L 200 100 70-130 <br /> Surrogate Toluene-d8 200 Jig/L 200 100 70-130 <br /> Surrogate 4-Bromofluorobenzene 204 Pg/L 200 102 70-130 <br /> Matrix Spike Dup(B000882-MSD1) Source 6040708-01Prepared&Analyzed 04/07/06 <br /> 1,1-Dichloroethene(l,l-DCE) 248 1 0 }ig/L 250 ND 99 70-130 2 20 <br /> Benzene 253 1 0 µg/L 250 ND 101 70-130 0 20 <br /> Trichloroethene(TCE) 251 1 0 µg/L 250 ND 100 70-130 1 20 <br /> Toluene 256 1 0 µglL 250 ND 102 70-130 0 20 <br /> Chlorobenzene 247 1 0 lig/L 25 0 ND 99 70-130 1 20 <br /> Surrogate Dibromofluoromethane 202 Ug1L 200 101 70-130 <br /> Surrogate Toluene-d8 198 JeglL 200 99 70-130 <br /> Surrogate 4-Bromofluorobenzene 207 leglL 200 104 70-130 <br /> Page 3 of 4 <br /> Lab Project# 6041208 CA Lab Accreditation# 2303 <br />