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Laboratories Inc. <br /> MWEnvironmental 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 /> rg no-Phosphorus Pesticide Analysis (EPA Method 8141) <br /> Quality Control Report - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent <br /> Constituent Hatch ID QC Sample T Sample ID Result Result Added Units RPD Recoveg RPD Recovery Lab Qualls <br /> Chlorpyrifos BRL0894 Matrix Spike 0814857-48 ND 0.84000 1.0000 ug/L 84.0 30-141 <br /> Matrix Spike Duplicate 0814857-48 ND 0.47500 1.0000 ug/L 55.5 47.5 30 30-1141 002 <br /> Diazinon BRL0894 Matrix Spike 0814857-48 ND 0.85500 1.0000 ug/L 85.5 53••138 <br /> Matrix Spike Duplicate0814857-48 ND 0.43000 1.0000 ug/L 66.1 43.0 27 53-138 002,003 <br /> _.._.__... --.—_---------- <br /> Methyl parathion BRL0894 Matrix Spike 0814857-48 ND 0.91500 1.0000 ug/L 91.5 43-136 <br /> Matrix Spike Duplicate 0814857-48 ND 0.43000 1.0000 ug/L 72.1 43.0 30 43-136 002 <br /> Triphenylphosphate(Surrogate) BRL0894 Matrix Spike 0814857-48 ND 2.4950 2.5000 ug/L 99.8 55-132 <br /> Matrix Spike Duplicate 0814857-48 ND 2.2000 2.5000 ug/L 88.0 55-.132 <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 inn its entirety. <br /> ® All results listed in this report are for the exclusive use of the submitting party. BC Laboratone assumes no responsibility for report alteration,separation,detachment or third Party intemetation. <br /> 4100 Atlas Court Bakersfield,CA 93308 ( 17-4919 AX(661)327-1998 www.bciabs.com age 23 of 54 <br /> Certifications: California-ELAP Certification NLIWr 1186; Nevada Administrative Code-NAC-445A <br />