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' HOUSTON LABORATORY <br /> 6INTERCHANGE DRIVE <br /> HOUSTON, <br /> TEXAS 77054 <br /> (713)660-0901 <br /> Quality Control Report <br /> EXXON Company U S A <br /> ' 000417-A1 <br /> Analysis Gasoline Range Organics WorkOrder 00040550 <br /> Method CA GRO Lab Batch 10 R12909 <br /> Method Blank Samples in Analytical Batch <br /> RunlD HP_W-000425C-258712 Units mg/L Lab Sample iD Client Sample ID <br /> ,Analysis Date 04/25/2000 12 35 Analyst DL 00040550-01A MW-1 <br /> 00040550-02A MW-2 <br /> 00040550-03A MW-3 <br /> ' Analyte Result Rep Limit <br /> Gasoline Range Organics ND 0050 <br /> 5urr 1 4-Ddfuorobenzene 1020 62-144 <br /> Surr 4 Bromofluoroben7ene 906 44 153 <br /> ' Laboratory Control Sample LCS <br /> Run1D HP-W-0004250 258711 Units mg/L <br /> Analysts Date 04/25/2000 11 45 Analyst DL <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> Gasoline Range Organics 1 088 88 64 1311 <br /> Matrix Spike(MS)!Matrix Spike Duplicate(MSD) <br /> Sample Spiked 00040550-02 <br /> Run1D HP-W-000425C 259431 Units mg1L <br /> Analysis Date 04/25/2000 15 50 Analyst DL <br /> W - -- — [Recovery <br /> ' RPD RPD Low High <br /> Ana€yfe Sample MS MS ResuliM5 /a MSD MSD Result MSD /oResult Spike Spike Recovery Limit Limit Limit <br /> i Added Added <br /> Gasoline Range Organics- _ — NDS- 0 9 �0 9 100 0 9 D 87� 963 382 36 T 36 -160 <br /> ' Qualifiers ND/U-Not Detected at the Reporting Limit `-Recovery Outside Advisable QC Limits <br /> B-Analyte detected in the associated Method Blank D-Recovery Unreportable due to Dilution <br /> J-Estimated value between MDL and PQL 00040550 Page 13 <br /> ' 428100 10 03 07 AM <br />