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--kBC Laboratories, Inc <br /> TRC Alton Geoscience Project: 1 1 195 <br /> 21 Technology Drive Project Number: [none] <br /> Irvine CA,92618-2302 Project Manager: Anju Farfan Reported: 10/13/05 15:57 <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Precision & Accuracy <br /> Control Limits <br /> Source Spike Percent Percent <br /> Constituent Batch ID QC Sample ID QC Sample Type Result Result Added Units RPD Recovery RPD Recovery Lab Quals <br /> Benzene B010066 B010066-MS1 Matrix Spike ND 27.460 25.000 uglL 110 70- 130 <br /> B010066-MSD1 Matrix Spike Duplicate ND 28.210 25.000 uglL 2.69 113 20.---70-130 <br /> Toluene 8010066 B010066-MS1 Matrix Spike ND 26.780 25.000 ug/L 107 70- 130 <br /> B010066-MSD1 Matrix Spike Duplicate ND 27.120 25.000 ug/L 0.930 108 20 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) B010066 B010066-MS1 Matrix Spike ND 9.9900 10.000 ug/L 99.9 76-114 <br /> B010066-MSD1 Matrix Spike Duplicate ND 9.8900 10.000 ug/L 98.9 76-114 <br /> Toluene-d8(Surrogate) 8010066 B010066-MS1 Matrix Spike ND 10.090 10.000 ug/L 101 88- 110 <br /> B010066-MSD1 Matrix Spike Duplicate ND 10.110 10.000 uglL 101 88-110 <br /> 4-Bromofluo robe nzene(Surrogate) 8010066 8010066-MS1 Matrix Spike ND 9.9800 10.000 ug/L 99.8 86- 115 <br /> B010066-MSD1 Matrix Spike Duplicate ND 9.7800 10.000 ug/L 97.8 _ 86-115 <br /> Benzene B010100 B010100-MSI Matrix Spike ND 26.410 25.000 ug/L 106 70- 130 <br /> 6010100-MSDI Matrix Spike Duplicate ND 27.020 25.000 ug/L 1.87 108 20 70-130 <br /> Toluene B010100 B010100-MS1 Matrix Spike ND 25.990 25.000 ug/L 104 70- 130 <br /> B010100-MSD1 Matrix Spike Duplicate ND 25.900 25.000 ug/L 0.00 104 20 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) B010100 8010100-MS1 Matrix Spike ND 9.8800 10.000 ug1L 98.8 76-114 <br /> B010100-MSD1 Matrix Spike Duplicate ND 10.020 10.000 ug1L 100 76-114 <br /> Toluene-d8(Surrogate) 8010100 B010100-MS1 Matrix Spike ND 10.160 10.000 ug/L 102 88- 110 <br /> B010100-MSD1 Matrix Spike Duplicate ND 10.130 10.000 ug/L 101 88-110 <br /> 4-Bromofluorobenzene(Surrogate) 8010100 B010100-MS1 Matrix Spike NO 9.8500 10.000 ug/L 98.5 86-115 <br /> B010100-MSD1 Matrix Spike Duplicate NO 9.9200 10.000 ug/L 99.2 86-115 <br /> BC Labore '"5 The results in this report apply to rhe sumpler tyzed in accordance with the champ of custody document. This analytical report must be rr {uced in its entirety <br /> All results listed in this report are fi)r due exclusive use of the submitting parry. BC Laboratorim tic.assumes no responsibility for report alteration.scpararion,detachment or third parry interpretation. <br /> 41(1(1 Ar1ic Clam- Raker,.6elrl (-.A 933(18 - f66 1) 17.7-4911 - FAX (661) 327-1918-www.bclabs.corn ('age 27 of 31 <br />