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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: 09/16/98
<br />COMMENTS
<br />a) ND =Not detected. NC = Not calculable due to value(s) lower
<br />than the detection limit.
<br />b) Data in the OA report may differ from final results due to
<br />digestion and/or dilution of samples into analytical ranges.
<br />Quality control results are reported "as analyzed" ui thin
<br />the instruments established calibration range.
<br />c) The "Time Analyzed" in the OA report refers to the start time of
<br />the analytical batch which may not reflect the actual time of
<br />each analysis. The "Date Analyzed" is the actual date of analysis.
<br />d) Results for soil and sludge samples are reported on a wet weight
<br />basis (i.e. not corrected for percent moisture) unless otherwise
<br />indicated.
<br />BLANK OC SAMPLE IDENTIFICATION
<br />MB Method Blank
<br />EB Extraction Blank
<br />ICB Initial Calibration Blank
<br />CCB Continuing Calibration Blank
<br />SPIKE OC SAMPLE IDENTIFICATION
<br />MS Method (Matrix) Spike
<br />MSD Method (Ma[ri x) Spike Duplicate
<br />PDS Pos [-Digestion Spike
<br />PSD Post-Digestion Spike Duplicate
<br />SB Spike Blank
<br />SBD Spike Blank Duplicate
<br />REFERENCE STANDARD OL SAMPLE IDENTIFICATION
<br />LLS Laboratory Control Standard
<br />RS Reference Standard
<br />ICV Initial Calibration Verification Standard
<br />CCV Continuing Calibration Verification Standard
<br />ISA/ISB ICP Interference Check Sample
<br />ICL Initial Calibration/Laboratory Control Sample
<br />DSC Distilled Standard Check
<br />CRI CRDL Low-Level ICP Standard
<br />DUPLICATE OC SAMPLE IDENTIFICATION
<br />MD Method (Matrix) Duplicate
<br />ED Extraction Duplicate
<br />SD Serial Dilution
<br />Analyses performed by a subcontract laboratory are indicated on the
<br />analytical and/or quality control reports under "Technic ian~' using
<br />the following codes:
<br />SUBCONTRACT LABORATORY CODE
<br />Core Laboratories - Anaheim, CA * AN
<br />Core Laboratories - Casper, NY * CA
<br />Lore Laboratories - Corpus Christi, TX • CC
<br />Core Laboratories - Edison, NJ • ED
<br />Page 5
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