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Client Name: Green Analytical Laboratories Report #: 374681 <br />Lab Definitions <br />Continuing Calibration Check Standard (CCC) / Continuing Calibration Verification (CCV) / Initial Calibration <br />Verification Standard (ICV) / Initial Performance Check (IPC) - is a standard containing one or more of the target <br />analytes that is prepared from the same standards used to calibrate the instrument. This standard is used to verify <br />the calibration curve at the beginning of each analytical sequence, and may also be analyzed throughout and at the <br />end of the sequence. The concentration of continuing standards may be varied, when prescribed by the reference <br />method, so that the range of the calibration curve is verified on a regular basis. CCL, CCM, and CCH are the CCC <br />standards at low, mid, and high concentration levels, respectively. <br />Internal Standards (IS) - are pure compounds with properties similar to the analytes of interest, which are added to <br />field samples or extracts, calibration standards, and quality control standards at a known concentration. They are <br />used to measure the relative responses of the analytes of interest and surrogates in the sample, calibration standard <br />or quality control standard. <br />Laboratory Duplicate (LD) - is a field sample aliquot taken from the same sample container in the laboratory and <br />analyzed separately using identical procedures. Analysis of laboratory duplicates provides a measure of the <br />precision of the laboratory procedures. <br />Laboratory Fortified Blank (LFB) / Laboratory Control Sample (LCS) - is an aliquot of reagent water to which <br />known concentrations of the analytes of interest are added. The LFB is analyzed exactly the same as the field <br />samples. LFBs are used to determine whether the method is in control. FBL, FBM, and FBH are the LFB samples at <br />low, mid, and high concentration levels, respectively. <br />Laboratory Method Blank (LMB) / Laboratory Reagent Blank (LRB) - is a sample of reagent water included in the <br />sample batch analyzed in the same way as the associated field samples. The LMB is used to determine if method <br />analytes or other background contamination have been introduced during the preparation or analytical procedure. <br />The LMB is analyzed exactly the same as the field samples. <br />Laboratory Trip Blank (LTB) / Field Reagent Blank (FRB) - is a sample of laboratory reagent water placed in a <br />sample container in the laboratory and treated as a field sample, including storage, preservation, and all analytical <br />procedures. The FRB/LTB container follows the collection bottles to and from the collection site, but the FRB/LTB is <br />not opened at any time during the trip. The FRB/LTB is primarily a travel blank used to verify that the samples were <br />not contaminated during shipment. <br />Matrix Spike Duplicate Sample (MSD) / Laboratory Fortified Sample Matrix Duplicate (LFSMD) - is a sample <br />al6iquot taken from the same field sample source as the Matrix Spike Sample to which known quantities of the <br />analytes of interest are added in the laboratory. The MSD is analyzed exactly the same as the field samples. <br />Analysis of the MSD provides a measure of the precision of the laboratory procedures in a specific matrix. SDL, <br />SDM, and SDH / LFSMDL, LFSMDM, and LFSMDH are the MSD or LFSMD at low, mid, and high concentration <br />levels, respectively. <br />Matrix Spike Sample (MS) / Laboratory Fortified Sample Matrix (LFSM) - is a sample aliquot taken from field <br />sample source to which known quantities of the analytes of interest are added in the laboratory. The MS is analyzed <br />exactly the same as the field samples. The purpose is to demonstrate recovery of the analytes from a sample matrix <br />to determine if the specific matrix contributes bias to the analytical results. MSL, MSM, and MSH / LFSML, LFSMM, <br />and LFSMH are the MS or LFSM at low, mid, and high concentration levels, respectively. <br />Quality Control Standard (QCS) / Second Source Calibration Verification (SSCV) - is a solution containing <br />known concentrations of the analytes of interest prepared from a source different from the source of the calibration <br />standards. The solution is obtained from a second manufacturer or lot if the lot can be demonstrated by the <br />manufacturer as prepared independently from other lots. The QCS sample is analyzed using the same procedures <br />as field samples. The QCS is used as a check on the calibration standards used in the method on a routine basis. <br />Reporting Limit Check (RLC) / Initial Calibration Check Standard (ICCS) - is a procedural standard that is <br />analyzed each day to evaluate instrument performance at or below the minimum reporting limit (MRL). <br />Surrogate Standard (SS) / Surrogate Analyte (SUR) - is a pure compound with properties similar to the analytes of <br />interest, which is highly unlikely to be found in any field sample, that is added to the field samples, calibration <br />standards, blanks and quality control standards before sample preparation. The SS is used to evaluate the efficiency <br />of the sample preparation process. <br />Page 3 of 3 <br />Page 18 of 20 <br />