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MR-M-95 TUE 17:06 AEN CALIFORNIA FAX NO, 5109300256 P, 21/25 <br /> Arnericaiz. Envir°onrnental Netli A- <br /> PAGE 5 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER: 9503137 <br /> CLIENT PROJECT ILS: $146 <br /> ua l i t,y .Coni;rot and_Project_. Summary <br /> All laboratory quality control parameters were found to be within established <br /> limits. <br /> Definitions <br /> Laboratory Control sample (LCS)/Nothod %pike(s)A control samples of known composition. LCS and Method Spike <br /> data orc. ul-od to validate batch analytical results. <br /> Matrix Bpike(s), ALictuot of a ample (aqueous or solidi with added quantities of specific compounds and <br /> aubjoetad to the entire analytical pracedure. Matrix spike and matrix spike duplicate QC data are advisory. j <br /> Method Rtank: An analytical tentrol consisting of all reagents, internal standards, and surrogate standards <br /> carried through ti,e entire analytical process. Used to monitor Laboratory background and reagent contamination. <br /> Not Detected (Nn): Not detected at or above the reporting limit. <br /> I <br /> Relative Percent Difference (RPD): An indication of method precision based on duplicate analysis. <br /> Reporting Limit (RL). The lowest Concentration routinely determined during laboratory operations. The RL is � <br /> generally 1 to 10 times the Method detection Limit (MDL). Reporting limits are matrix, method, and analyte <br /> dependent and take into recount any dilutions performed as part of the analysis. <br /> Surroglzes: organic compounds Which are similar to analytes of interest in chemical behavior, Wt are not found <br /> in environmental samples. Surrogates are added to all blanks, calioratlon and check standards, samples, and <br /> spiked samples. Surrogate recovery is monitored as an inaicaiion of acceptable sample preparation and <br /> instrumental performance. <br /> i <br /> D: Surrogates diluted out. <br /> #: indicates result outside of established laboratory QC limits. <br /> 4 <br /> f <br />