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D-TEK Analytical Laboratories, Inc. <br /> 9020 Kenamar Drive,Spite 205 <br /> San Diego,CA 92121 <br /> . (858)5664540 FAX(858)566-4542 <br /> QUALITY CONTROL DATA REPORT <br /> Date: 10/28/05 <br /> ' Attn: Mr. Greg Tijirlan <br /> Date Extracted: 10119105 <br /> Date Analyzed: October 19, 2045 <br /> ' Analysis Method: EPA 8151A <br /> Log#: OS-4760 to 05-4763 <br /> METHOD BLANK <br /> No target analytes were detected in the method blank. <br /> ' LABORATORY CONTROL SAMPLE <br /> QC DUP RFD <br /> Compound % Recovery Limits % Recovery % RPD Limits <br /> 2,4-D 82 50-180 85 4 30 <br /> ' 2,4,5-TP (Silvcx) 89 42-180 96 8 30 <br /> 2,4,5-T 84 68-160 89 6 30 <br /> ' SUItIOGATE RECOVERIES <br /> (DCAA) <br /> Log# Percent Recovtetry: <br /> Method Blank 131 <br /> U5-4760 91 <br /> 05-4761 87 <br /> 05-4762 99 <br /> t05-4763 70 <br /> LCS 91 <br /> LCS DUP 100 <br /> ' QC Limits : 43 to 169% <br /> ' r <br /> ' Ellen Atienza <br /> Operations Manager <br /> ' QUALM CjWnQi,TE RMJN0L0rY <br /> I.t'S-LABORATORV CC)NTRUI,SAMPLE, Repurted as %res'4very of an independent stundard car6cd through all <br /> sample pmp3rsition procedures to verify method performwe.Acceptable range is bawd on historical lahoralory uuntrul data <br /> • and CPA mquircments. Any out-or-control QC data Iselearly indicated. <br /> Spike-environmental sample is rnxbix splkad with method compounds and%recovery orconecntration spitted into ample+s <br /> . calculated. Reported as V.mcovery. Acceptable range ttw "Normal Matrix Sample"is based on histuricul laboratory contml <br /> data. Any out-ur-cuntrol QC:data is clearly indicated. <br /> Surrallates-C'nmpnunds representative ora group orcurrtpounds. Surrogates are spiked intn environmental samples and% <br /> recovery nreamcntntion spiked is calculatcd and mporad, Aeecptnblc range varies depending on sample matrix and analysis <br /> method. Any ouvvr-control QC data is clearly indicated. <br /> 1 <br />