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Laboratories Inc. , <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: Austin Road/NCYCC Drilling Reported: 12/19/2008 13:17 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles,MO 63304 Project Manager: David Vasbinder <br /> EPA Method 1664 <br /> Quality Control Report - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent <br /> Constituent Batch ID QC Sam e Type Sam to ID Result Result Added Units RPD Recove RPD Recovery Lab Quals <br /> Oil and Grease BRL1157 Matrix Spike 0814857-88 ND 33.950 37.300 mg/L 91.0 78-114 <br /> Matrix Spike Duplicate 0814857-88 ND 34.950 37.300 mg/L 2.9 93.7 18 78-114 <br /> The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submitting party. BC Lal»rator427-4911 <br /> assum <br /> es no responsibility for report Aeration,separation,detachment or third party interpretation. <br /> 4100 Atlas Court Bakersfield,CA 93308 ( FAX(661)327-1918 www.bclabs.c:om Page 29 of 54 <br /> Certifications: California-ELAP Certification Nr 1186; Nevada Administrative Code-NAC-445A <br />