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i <br /> GENERAL NARRATIVE <br /> I <br /> Comments <br /> ' Test methods may include minor modifications of published EPA methods (e g , <br /> reporting limits or parameter lists) Reporting limits are adjusted to reflect <br /> dilution of the sample when appropriate Solids and waste are analyzed with no <br /> correction made for moisture content <br /> Percent recoveries for laboratory control samples and matrix spikes have been <br /> ' calculated using unrounded concentration values Therefore, percent recoveries <br /> reported may differ slightly from those obtained from the rounded concentration <br /> values which appear on the report <br /> EPA 8020 BTEX - TPH_�Water <br /> The surrogate recoveries for the analytes flagged on the data sheet were beyond <br /> ' acceptance limits for the following sample 12901-LCS Gasoline <br /> EPA 8020 BTEX - TPH (Soil) <br /> The surrogate recoveries for the analytes flagged on the data sheet were beyond <br /> acceptance limits for the following samples 12901-LCS, Method Blank <br /> ' EPA 8080 Pesticides <br /> Heptachlor Epoxide can exist as two isomers The data reported for USEPA Method <br /> 8080 is the total Heptachlor Epoxide present in the sample, which may consist of <br /> any combination of the isomers <br /> ' The surrogate recoveries for the analytes flagged on the data sheet were beyond <br /> acceptance limits due to the presence of a suspect interferant for the following <br /> sample 12901-004 <br /> The LCS recoveries for the analytes flagged on the US data sheets are outside <br /> of advisory quality control limits, however, all other QC meets the laboratory's <br /> acceptance criteria <br /> ' Abbreviations and Definitions � <br /> MB Method BIank - An aliquot of a blank matrix carried throughout the <br /> entire analytical process <br /> US Laboratory Control Sample - A blank to which known quantities of <br /> ' specific analytes are added prior to sample preparation and analysis <br /> to assess the accuracy of the method <br /> MS/MSD Matrix Spike/Matrix Spike Duplicate - Duplicate samples to which <br /> known quantities of specific analytes are added prior to sample <br /> preparation and analysis to assess the extent of matrix bias or <br /> ' interference on analyte recovery <br /> (CN12901) <br /> MBT Environmental i = - <br /> ' Laboratories ��'�� <br /> �1 <br />