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A <br /> Quality Assurance Report <br /> MTBE by GC/MS in Water <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RITC Limits RPD Limit Notes <br /> Batch B000906-EPA 5030 CC/M5 <br /> Blank B000906-BLKI Pre ared&Analyzed 04/14/06 <br /> Methyl tert-Butyl Ether (MTBE) ND 10 1ig/L <br /> Surrogate Dibromofluoromethane 201 µg/L 200 100 70-130 <br /> Surrogate Toluene-d8 191 leg/L 200 96 70-130 <br /> Surrogate 4-Bromofluorabenzene 192 ug/L 200 96 70-130 <br /> Matrix Spike(B000906-MSI) Source 6041407-02 Prepared&Analyzed 04/14/06 <br /> 1,1-Dichloroethene(1,1-DCE) 218 10 pg/l, 250 ND 87 70-130 <br /> Benzene 227 1 0 µg/l, 25 0 ND 91 70-130 <br /> Tnchloroethene(TCE) 23 1 1 0 ug/L 250 ND 92 70-130 <br /> Toluene 22 6 1 0 pg/l- 25 0 ND 90 70-130 <br /> Chlorobenzene 225 1 0 gg/L 250 ND 90 70-130 <br /> • Surrogate Dibromofluoromethane 202 ug/L 200 101 70-130 <br /> Surrogate Toluene-d8 192 leg/L 200 96 70-130 <br /> Surrogate 4-Bromofluorobenzene 193 ug/L 200 96 70-130 <br /> Matrix Spike Dup(B000906-MSD1) Source 6041407-02 Prepared&Analyzed 04/14/06 <br /> 1,1-Dichloroethene(1,1-DCE) 222 10 µg/L 250 ND 89 70-130 2 20 <br /> Benzene 230 1 0 pgfL 250 ND 92 70-130 1 20 <br /> Trichloroethene(TCE) 234 1 0 pg/L 250 ND 94 70-130 2 20 <br /> Toluene 226 1 0 µg/L 25 0 ND 90 70-130 0 20 <br /> Chlorobenzene 229 10 leg/L 250 ND 92 70-130 2 20 <br /> Surrogate Dibromofluoromethane 199 µg/L 200 100 70-130 <br /> Surrogate Toluene-d8 189 µg/L 200 94 70-130 <br /> Surrogate 4-Bromofluorobenzene 190 Ng/L 200 95 70-130 <br /> Page 3 of 4 <br /> Lab Projcct# 6041909 CA Lab Accreditation# 2303 <br />