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L-Torrent LAR 17 R.s1 O11 Y, INC Laboratory Qualifiers and Definitions DEFINITIONS: AccuracylBlas('/o Recovery)-The closeness of agreement between an observed value and an accepted reference value. Blank(Mutho di P ropa ration arank)-Me)PB-An anetytedree.matrix to yi'hich all reagents are added In the same volumes/proportions as used In sample processing. The method blank Is used to dacurnent contamfnallon resulting from the analytical process. Duplicate-a field sample and/or laboratory QC sample prepared in duplicate following all of the same processes and procedures used on the original sample (sample duplicate.LCSD,MSD) Laboratory Control Sample(LC3 ad LCSD)-A known matrix spiked with compounds representative of the target analyle(s). This Is used to document laboratory performance. Matrix-the component or substrate that contains the analyte of Interest(e.g.,-groundwater,sediment,soil,waste water,etc) Matrix Spike(il 8iMSD). Giant sample spiked with identical concentrations of target analyte(s). The spiking occurs prior to the sample preparation and analysis. They are used to document the precision and bias of a method In a given sample matrix. Method Detectfon Limit(MDL)- the minimum concentration of a substance that can be measured and reported with a 99%confidence that the analyte concentration is greater than zero Practical Quantitation.Limit (PQL)-a laboratory determined value at 2 to S limes above Fha MIX that can be reproduced in a manner that results in a 99% confidence level that the result is both acrurate and precise.PGL*reffecl all preparation factors and/or dilution factors that have been applied to the sample during the preparallorit endfor analytical processes. Precision(%RPD)-The agreement among a set of repllcateldupilCato measurements without regard to known value of the replicates Surrogate(S)or(surr�-An organic compound which IS slrnliar to the target anatyte(s)In chemical composition and behavior in the analytical process,but which Is not normally found In environmental samples.Surrogates are used In most organic analysis to demonstrate matrix cornpatlbl111y with ihechosen method of analysis Tentatively fdantttied Compound MC)-A eonVound not contalned within the is Iva llbtrati vo 43tandurIdentis but pre ❑the t In the pe GCund haaedr r ofdef ionUme compounds. When the library is searched for an unknown compound.4 canfrequently B and primary and secondary Ian match. Ti Cs are reported as estimates and are candidates for tor1her Invesllgallvn. Ue unit of measuro used le express the reported result-mg?L and niglKg(equtvalent to PPM-pa its per MIlton in liquid and sofid),ug1L and ug/lige ent[a PPB-partsp®r bllAon In liquid MS + ocertnfounfpi on thea sbv ub ce of am v 1 sl Igleas u re ts of )ep usas tj re ua lytalsanrieve fnt to tfl�d pPn►or t.f}011,444 ppb).ug P t LABORATORY QUALIFIERS; B-Indicates when the anlayte Is found In the associated method or preparation blank D-Surrogate Is not recoverable due to the necessary dilution of the sample E-indicates the reportable value is outside of the calibration range of the instrument but within the linear range of the Instrument(unress otherwise noted) Values reported with an E quallfler should be considered as estimated. H-Indicates that the recommended holding lime for ttre analyte or compound has been exceeded J-indicates a value between the method MDL and PQL and that the reported concentration should be considered as estimated rather the quantitative NA-Not Analyzed N/A-Not Applicable NR-Not recoverable-a matrix spike concentration is not recoverable due to a concentration within the original sample that Is greater than four times the spike concentration added R-71he%ftpD hetween a duplicate set of samples is outside of the absolute values esta6llshad by laboratory control charts S-Spike recovery Is outside of established method and/or laboratory control limits. Further explanation of the use of this qualifier should be included within a case narrative X-Used to indicate that a value based CHI pattern Identification is within the pattern range frit not typical of the pattern found In standards. Further explanation may or may not be provided wlihin the sample footnote end/or the case narrative. f ua3 Srt,ctOrr F r�rntnne)rorL,0jjilpjjas,C'A 860S19 10f:AOLi,2fi�.52B8 I f.�x_4QEF.263_Cil�J3 1 wv.w.rdlrri+tlat5-rr�lFt Page 1130f 16 Total Page Count: 16