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ALCJ1*0-&- Laboratories, Inc <br /> TRC Alton Geoscience Project 11192 <br /> 21 Technology Drive Project Number [none] <br /> Irvine CA,92618-2302 Project Manager Anju Farfan Reported 09/12/05 14 16 <br /> Ilk <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Precision & Accuracy <br /> Control Limits <br /> Source Spike Percent Percent <br /> Constituent Batch 1D QC Sample ID QC Sample Type Result Result Added Units RPD Recovery RPD Recove Lab Quals <br /> Benzene B010044 B010044-MS1 Matrix Spike ND 25 210 25 000 uglL 101 70-130 <br /> 6010044-MSDI Matrix Spike Duplicate ND 24 680 25 000 ug1L 2 30 98 7 20 70-130 <br /> Toluene B010044 B010044-MS1 Matrix Spike ND 24 060 25 000 uglL 96 2 70-130 <br /> 6010044-MS01 Matrix Spike Duplicate ND 24 330 25 000 uglL 1 14 97 3 20 70-130 <br /> 1,2-Dichloroethane d4(Surrogate) B010044 8010044-MS1 Matrix Spike ND 10 050 10 000 uglL 100 76- 114 <br /> 8010044-MSD1 Matrix Spike Duplicate ND 10 020 10 000 uglL 100 76-114 <br /> Toluene-d8(Surrogate) B010044 8010044-MS1 Matrix Spike ND 96700 10 000 uglL 96 7 J 88- 110 <br /> B010044-MSDI Matrix Spike Duplicate ND 96600 10 000 ug1L 966 88 110 <br /> 4-Brornofluorobenzene(Surrogate) B010044 B010044-MS1 Matrix Spike ND 10 000 10 000 uglL 100 86- 115 <br /> 8010044-MSD1 Matrix Spike Duplicate ND 10 070 10 000 uglL 101 86- 115 <br /> Benzene 8010046 8010046-MS1 Matrix Spike ND 23 930 25 000 ug1L 957 70- 130 <br /> B010046-MSD1 Matrix Spike Duplicate ND 22 400 25 000 ug1L 6 58 89 6 20 70- 130 <br /> Toluene B010046 B010046-MS1 Matrix Spike ND 24 850 25 000 uglL 994 70-130 <br /> B010046-MSD1 Matrix Spike Duplicate ND 24 340 25 000 ug1L 203 97 4 20 70- 130 <br /> 1,2-Dichloroethane d4(Surrogate) B010046 8010046-MS1 Matrix Spike ND 99700 10 000 ug1L 997 76- 114 <br /> 8010046-MSDI Matrix Spike Duplicate ND 91800 10 000 uglL 91 8 76 114 <br /> Toluene-d8(Surrogate) B010046 B010046-MSI Matrix Spike ND 95800 10 000 uglL 958 88-110 <br /> 6010046-MSD1 Matrix Spike Duplicate ND 94300 10 000 uglL 94 3 88- 110 <br /> 4-Bromofluorobenzene(Surrogate) B010046 8010046-MSI Matrix Spike ND 91200 10 000 uglL 912 86 115 <br /> 6010046-MSD1 Matrix Spike Duplicate ND 90500 10 000 ug1L 90 5 86- 115 <br /> Benzene B010244 B010244-MSI Matrix Spike ND 17 820 25 000 uglL 713 70-130 <br /> B010244-MSDI Matrix Spike Duplicate ND 17 560 25 000 ug1L 1 55 702 20 70 130 <br /> Toluene B010244 8010244-MSI Matrix Spike ND 21 620 25 000 uglL 865 70-130 <br /> B010244-MSDI Matrix Spike Duplicate ND 21 390 25 000 ug1L 1 05 85 6 20 70 130 <br /> 1 2-Dichloroethane-d4(Surrogate) 6010244 B010244-MS1 Matrix Spike ND 10 210 10 000 ug/L 102 76- 114 <br /> 80!0244-MSD1 Matrix Spike Duplicate ND 10 110 10 000 uglL 101 76 114 <br /> Toluene-d8(Surrogate) B010244 6010244-MS1 Matrix Spike ND 98700 10 000 ug1L 987 88-110 <br /> 6010244-MSDI Matrix Spike Duplicate ND 92400 10 000 uglL 924 88- 110 <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with the chain of custody document Thra analytical report rnusl be reproduced in its 01111?Li) <br /> iAll results listed in this report are for the exclusive use of the submitting parry BC Laborattin assumes no responsibility for reporr a]tcranon separation detachment or third parry rnterprcranon <br /> 4100 Atlas Court- Bakersfield,CA 93308 0(6 27-4911 6 FAX(661)327-1918•www bclabs corn 0 Page 17 of 22 <br />