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BC Laboratories, Inc <br /> 'FRC Alton Geoscsence Project 11192 <br /> 21 Technology Drive Project Number [none] <br /> Irvine CA,92618-2302 Project Manager Anju Farfan Reported 09/12/05 14 lb <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 Swrnple_Type Result Result Added Units RPD Recovery RPD Recove Lab Quals <br /> 4-Bromofluorobenzene(Surrogate) 13010244 B010244-MS1 Matrix Spike ND 10 090 10 000 uglL 101 86-115 <br /> B010244-MS01 Matrix Spike Duplicate ND 95700 10 000 ug/L 957 86-115 <br /> I <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with the chain of custody document This analyttcal report must be reproduced to its entirety <br /> All results listed in this report are for the exclusive use of the submitting parry BC Laboratories Inc assumes no responsibility for report alteration separation detachment or third party interpretation <br /> 4100 Atlas Court• Bakersfield,CA 93308•(661)32.7-4911 •FAX(661) 327-1918•www bclabs corn Page 18 of 22 <br />