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<br />CORE LABORATORIES
<br />D U A L I T Y A S S U R A N C E M E T H O D S
<br />R E F E R E N C E S A N D N O T E S
<br />Report Date: 09/28/96
<br />MB Method Blank
<br />ICB Initial Calibration Blank
<br />LCB Continuing Calibration Blank
<br />SPIKE OC SAMPLE IDENTIFICATION
<br />MS Method (Matrix) Spike
<br />MSD Method (Matrix) Spike Duplicate
<br />PDS Post Digestion Spike
<br />SB Spiked Blank
<br />SBD Spike Blank Duplicate
<br />REFERENCE STANDARD OC SAMPLE IDENTIFICATION
<br />LCS Laboratory Control Standard
<br />RS Reference Standard
<br />ICV Initial Calibration Verification Standard
<br />CCV Continuing Calibration Verification Standard
<br />ISA/ISB ICP Interface Check Sample
<br />ICL Initial Calibration/Laboratory Control Sample
<br />DSC Distilled Standard Check
<br />DUPLICATE OC SAMPLE IDENTIFICATION
<br />MD Method (Matrix) Duplicate
<br />ED Extraction Duplicate
<br />DD Digestion Duplicate
<br />Analyses performed by a subcontract laboratory are indicated on the
<br />analytical and/or quality control reports under "technician" using
<br />the following codes:
<br />SUBCONTRACT LABORATORY CODE
<br />Core Laboratories - Anaheim, CA • AN
<br />Core Laboratories - Casper, NY • LA
<br />Lore Laboratories - Corpus Christi, TX • LC
<br />Lore Laboratories - Houston, TX ' HP
<br />Core Laboratories - Lake Charles, LA • LC
<br />Core Laboratories - Long Beach, CA • LB
<br />Other Subcontract Laboratories " XX
<br />E%PLANATION OF DATA FLAGS
<br />B - This flag is used Co indicate that an analyte is
<br />present in the method blank as well as in the sample.
<br />It indicates that The client should consider this
<br />when evaluating the results.
<br />D - This flag indicates that surrogates were diluted out
<br />of calibration range and cannot be quantified.
<br />E - Indicates that a sample result is an estimate because
<br />the concentration exceeded the calibration range of
<br />the instrument.
<br />I - Used to indicate matrix interference.
<br />J - Indicates that a value is an estimate. It is used
<br />when a compound is determined to be present based on
<br />the mass spectral data, but a[ a concentration less
<br />than the practical quantitation limit of the method.
<br />Page 4
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