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~9E~
<br />CORE LABORATORIES
<br />g U A L I T Y A S S U R A N C E M E T H O D S
<br />REFERENCE S A N D N O T E S
<br />Report Oat e: 12/29/98
<br />EXPLANATION OF DATA OUALI FIERS - ORGANIC PARAMETERS
<br />U - This qualifier indica [es [ha[ [he analyte was analyzed
<br />for but not detected.
<br />J - Organic GC/MS Methods: This qualifier indicates that
<br />the value is an estimate. It is used when a compound
<br />is determined to be present based on the mass spectral
<br />data but at a concentration below the practical
<br />quantitation limit of the method.
<br />J - Organic GL Methods: This qualifier indicates
<br />presumptive evidence of the presence of the
<br />compound at an estimated quantity.
<br />E - This qualifier indicates that a sample result is an
<br />estimate because the concentration exceeded the upper
<br />calibration range of the instrument.
<br />EXPLANATION OF DATA OUALI FIERS - METALS 6 INORGANIC PARAMETERS
<br />U - This qualifier indicates that the analyte was analyzed
<br />for but not detected.
<br />B - This qualifier indicates that the analyte was detected
<br />at a level bel ou the reporting limit but greater than
<br />or equal to the instrument detection limit.
<br />EXPLANATION OF DATA FLAGS - ALL PARAMETERS
<br />B - This flag indicates that an analyte is present in
<br />the method blank as cell as in [he sample. The client
<br />should consider this when evaluating the data.
<br />E - This flag indicates the reported value is estimated due
<br />to sample matrix interference.
<br />W - This flag indicates that a post-digestion spike for
<br />GFAA analysis is outside quality control limits.
<br />X - This flag indicates that a surrogate recovery is
<br />outside quality control limits.
<br />Y - This flag indicates a spike or spike duplicate recovery
<br />is outside quality control limits.
<br />2 - This flag indicates a relative percent difference for
<br />a spike and spike duplicate is outside quality
<br />control limits.
<br />* - This flag indicates a relative percent difference for
<br />a duplicate analysis is outside quality control
<br />limits-
<br />- This flag indicates a percent recovery fora standard
<br />is outside quality control limits.
<br />Page 3
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