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x- 09/04/96 WED 11 18 FAX GROUNDWATER f�009 <br /> Anierican Environtiiertral Nerwoy <br /> . <br /> PAGE 8 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9608057 <br /> CLIENT PROJECT IO 020200213 2003 <br /> Quality-Control and Project Summar <br /> All laboratory quality Control parameters were found to be within established <br /> limits <br /> Definitions <br /> Laboratory Control Sample (LCS)/Method Spike(s) Control samples of known cagxisition LCS and Method Spike <br /> data are used to validate batch analytical results <br /> Matrix Spike(s). Aliquot of a sample (aqueous or soled) with added quantities of specific compounds and <br /> subjected to the entire anatytical procedure. Matrix spike and matrix spike duplicate QC data are advisory. <br /> Method Stank- An analytical control consisting of all reagents, internal standards, and surrogate standards <br /> carried through the entire analytical process- used to monitor Laboratory background and reagent contamination. <br /> Not Detected (NO)* Not detected at or above the reporting limit. <br /> Retative Percent Difference CRPD). An indication of method precision based on duplicate analysis. <br /> Reporting Limit (RL) The lowest concentration routinely determined during laboratory operations. The AL is <br /> generally 1 to 10 times the Method Detection Limit (MDL) Reporting limits are matrix, method, and analyte <br /> dependent and take into account arty dilutions performed as part of the analysis <br /> Surrogates Organic compouids which are similar to analytes of interest in chemical behavior, but are not found <br /> in environmental samples. Surrogates are added to all blanks, calibration and check standards, samples, and <br /> spiked saMtes Surrogate recovery is monitored as an indication of acceptable sample preparation and <br /> Instrumental performance. <br /> D Surrogates diluted out. <br /> # indicates result outside of established taboratory CC limits <br /> i <br />