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GLOSSARY OF TERMS ONE LAB.NATIONWIDE. <br /> Guide to Reading and Understanding Your Laboratory Report <br /> The Information below is designed to better explain the various terms used In your report of analytical results from the Laboratory. This is not <br /> 2intended as a comprehensive explanation,and if you have additional questions please contact your project representative. <br /> 17 <br /> Abbreviations and Definitions [Tc <br /> MDL Method Detection Limit <br /> RDL Reported Detection Limit 3SS] <br /> Rec. Recovery. <br /> RPD Relative Percent Difference. rCn <br /> SDG Sample Delivery Group. <br /> u Not detected at the Reporting Limit(or MDL where applicable). <br /> Analyte The rame of the particular compound or analysis performed.Some Analyses and Methods will have multiple analytes r <br /> Sr <br /> reported. <br /> If the sample matrix contains an interfering material,or if concentrations of analytes in the sample are higher than the <br /> Dilution highest limit of concentration that the laboratory can accurately report,the sample may be diluted for analysis.If a value F <br /> different than 1 is used in this field,the result reported has already been corrected for this factor. 0 <br /> These are the target%recovery ranges or%difference value that the laboratory has historically determined as normal <br /> Limits for the method and analyte being reported.Successful QC Sample analysis will target all analytes recovered or <br /> duplicated within these ranges. <br /> Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference(RPD)from a quality control <br /> sample.The Original Sample may not be included within the reported SDG. <br /> This column provides a letter and/or number designation that corresponds to additional information concerning the result aA} <br /> Qualifier reported.If a Qualifier is present,a definition per Qualifier is provided within the Glossary and Definitions page and <br /> potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. 9 <br /> The actual analytical final result(corrected for any sample specific characteristics)reported for your sample.If there was SC <br /> no measurable result returned for a specific analyte,the result in this column may state"ND"(Not Detected)or"BDL" <br /> Result (Below Detectable Levels).The information in the results column should always be accompanied by either an MDL <br /> (Method Detection Limit)or RDL(Reporting Detection Limit)that defines the lowest value that the laboratory could detect <br /> or report for this analyte. <br /> A brief discussion about the Included sample results,including a discussion of any non-conformances to protocol <br /> Case Narrative(Cn) observed either at sample receipt by the laboratory from the field or during the analytical process.If present,there will <br /> be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. <br /> Quality Control This section of the report Includes the results of the laboratory quality control analyses required by procedure or <br /> Summary(Qc) analytical methods to assist in evaluating the validity of the results reported for your samples.These analyses are not <br /> being performed on your samples typically,but on laboratory generated material. <br /> This Is the document created in the field when your samples were initially collected.This is used to verify the time and <br /> Sample Chain of date of collection,the person collecting the samples,and the analyses that the laboratory Is requested to perform.This <br /> Custody(Sc) chain of custody also documents all persons(excluding commercial shippers)that have had control or possession of the <br /> samples from the time of collection until delivery to the laboratory for analysis. <br /> This section of your report will provide the results of all testing performed on your samples.These results are provided <br /> Sample Results(Sr) by sample ID and are separated by the analyses performed on each sample.The header line of each analysis section for <br /> each sample will provide the name and method number for the analysis reported. <br /> Sample Summary(Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID,including the dates and <br /> times of preparation and/or analysis. <br /> Qualifier Description <br /> J The identification of the analyte is acceptable;the reported value is an estimate. <br /> TB Sample(s)received past/too close to holding time expiration. <br /> ACCOUNT: PROJECT: SDG: DATEMME PAGE: <br /> Rettew Associates,Inc. 10T/32000 L933173 09/06i17 0926 13 of 16 <br />