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PAGE 12 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9509264 <br /> ' CLIENT PROJECT ID 0101 CONRADY <br /> Qualitz Control Summar <br /> ' All laboratory quality control parameters were found to be within established <br /> limits <br /> ,I <br /> I , <br /> Definitions <br /> I I <br /> Laboratory Control Sample (LCB)/Method Spike(s)•, Control samples of known composition LCS and Method Spike <br /> data are used to validate batch anaLyttcal results. <br /> Matrix Spike(s): Aliquot of a sample (aqueous or solid) with added quantities of specific compounds and <br /> j subjected to the entire analyticatlprocedure Matrix spike and matrix spike duplicate CC data are advisory. <br /> Method Blank: An analytical control consisting of all reagents, internal standards, and surrogate I standards <br /> ' carried through the entire analytical process. Used to monitor laboratory background and reagent contamination <br /> Not Detected (ND) Not detected at or above the reporting limit <br /> r <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 account any dilutions performed as part of the analysis. , fl <br /> I ! 1 <br /> Surrogates- flrgantc compounds which are similar to analytes of interest inchemicalbehavior, but are not found ) i! <br /> in environmental samples. Surrogates are added to,aLL blanks,! caLibration and check standards,Isamples,f and R <br /> ' I spiked 'samples. Surrogate! recovery is! mom tored as an indication of acceptable sample preparation and ' <br /> I "I i inst'rlumental performance I II fl I' I I l I <br /> D III, <br /> Surrogati s di luded out I' <br /> l I rr I <br /> I I r � <br /> E #: Indicates result`outside�of established laboratory DC Limits <br /> I 1 r I,d Pl�,1 <br /> � PII1 n1'€€1,Illi' 'IIE� 11"�IiI EI'I 'lli II dIIpf I�G I,II II�II�II' ,i lll[q(II <br /> I I + tl I [ I dl �f <br /> _ I 4 <br />