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GLOSSARY OF TERMS ONE LAB.NATIONWIDE. Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not FP1 intended as a comprehensive explanation,and if you have additional questions please contact your project representative. FTC Results Disclaimer-Information that may be provided by the customer,and contained within this report,include Permit Limits,Project Name, Sample ID,Sample Matrix,Sample Preservation,Field Blanks,Field Spikes,Field Duplicates,On-Site Data,Sampling Collection Dates/Times,and Sampling Location.Results relate to the accuracy of this information provided,and as the samples are received. Abbreviations and Definitions FSS SDG Sample Delivery Group. Uncertainty r�n (Radiochemistry) Confidence level of 2 sigma. A brief discussion about the included sample results,including a discussion of any non-conformances to protocol Case Narrative(Cn) observed either at sample receipt by the laboratory from the field or during the analytical process.If present,there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control This section of the report includes the results of the laboratory quality control analyses required by procedure or Summary(Qc) analytical methods to assist in evaluating the validity of the results reported for your samples.These analyses are not FAI being performed on your samples typically,but on laboratory generated material. This is the document created in the field when your samples were initially collected.This is used to verify the time and Sample Chain of date of collection,the person collecting the samples,and the analyses that the laboratory is requested to perform.This Custody(Sc) chain of custody also documents all persons(excluding commercial shippers)that have had control or possession of the FSC samples from the time of collection until delivery to the laboratory for analysis. This section of your report will provide the results of all testing performed on your samples.These results are provided Sample Results(Sr) by sample ID and are separated by the analyses performed on each sample.The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary(Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID,including the dates and times of preparation and/or analysis. Qualifier Description The remainder of this page intentionally left blank,there are no qualifiers applied to this SDG. ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: AECOM-BNSF Region 4 60622637.03 L1283454 11/30/20 12:58 5 of 11