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A <br /> Quality Assurance Report <br /> MTBE by GUMS 1n Water <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch B001004-EPA 5030 CC/MS <br /> Blank(BOO 1004-BLK1 Prepared 05/03/06 Analyzed 05/05/06 <br /> Methyl tert-Butyl Ether (MTBE) ND 1 0 µg/l, <br /> Surrogate Dibromofluoromethane 211 ug1L 200 106 70-130 <br /> Surrogate Toluene-d8 209 Ug/L 200 104 70-130 <br /> Surrogate 4-Bromofluorobenzene 191 Pg/L 200 96 70-130 <br /> Matrix Spike B001004-MSI) Source 6050305-04 Prepared 05/03/06 Analyzed 05/05/06 <br /> 1,1-Dichloroethene(1,1-DCE) 210 10 pg/L 250 ND 84 70-130 <br /> Benzene 242 1 0 µg/L 250 ND 97 70-130 <br /> Trichloroethene(TCE) 23 8 1 0 µg/L 25 0 ND 95 70-130 <br /> Toluene 243 1 0 pg/L 250 ND 97 70-130 <br /> Chlorobenzene 225 1 0 µg/L 250 ND 90 70-130 <br /> Surrogate Dibromofluoromethane 211 Ng/L 200 106 70-130 <br /> Surrogate Toluene-d8 213 µg/L 200 106 70-130 <br /> Surrogate 4-Bromofluorobenzene 184 Ug/L 200 92 70-130 <br /> Matrix Spike Dup(B0.01004-MSD1) Source 6050305-04 Prepared 05/03/06 Analyzed 05/05/06 <br /> 1,1-Dichloroethene(I,1-DCE) 2I 1 10 µg/L 25 0 ND 84 70-130 0 20 <br /> Benzene 245 10 tig/L 250 ND 98 70-130 1 20 <br /> Tnchloroethene(TCE) 243 1 0 pg/L 250 ND 97 70-130 2 20 <br /> Toluene 248 1 0 µg/L 25 0 ND 99 70-130 2 20 <br /> Chlorobenzene 228 1 0 pg/L 250 ND 91 70-130 1 20 <br /> Surrogate Dibromofluoromethane 210 µg/L 200 105 70-130 <br /> Surrogate Toluene-d8 213 Ng/L 200 106 70-130 <br /> Surrogate 4-Bromofluorobenzene 184 Ng/L 200 92 70-130 <br /> Page 3 of 4 <br /> Lab Project# 6050508 CA Lab Accreditation# 2303 <br />