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~~LAB <br />CORE LABORATORIES <br />D U A L I T Y A S S U R A N C E M E T H D D S <br />R E F E R E N C E S A N D N O T E S <br />Report Dete: 11/25/98 <br />Core Laboratories - Gulf States - Houston, TN • HE <br />Core Laboratories - Houston, TX • HP <br />Core Laboratories - Indianapolis, IN • IN <br />Core Laboratories - Lake Charles, LA ` LC <br />Core Laboratories - Long Beach, CA • LB <br />Core Laboratories Tampa, FL ` TP <br />Core Laboratories - Valparaiso, IN ' VP <br />Other Subcontract Laboratories • XX <br />E%PLANATION OF DATA DUALI FIERS ORGANIC PARAMETERS <br />U - This qualifier indicates that the anal yte was analyzed <br />for but no[ detected. <br />J - This qualifier indicates that the value is an estimate. <br />It is used when a compound is determined to be present <br />based on the mass spectral data but at a concentration <br />Less than the practical quantitation limit of the <br />method. <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 />E%PLANATI ON OF DATA OUALIFI ERS METALS 8 INORGANIC PARAMETERS <br />U - This qualifier indicates that the anatyte was analyzed <br />for but not detected. <br />B - This qualifier indicates that the anatyte was detected <br />at a level below the reporting Limit but greater than <br />or equal to the instrument detection Limit- <br />E%PLANATION OF DATA FLAGS - ALL PARAMETERS <br />B - This flag indicates that an analyze is present in <br />the method blank as well as in the 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 iniicates that a post-digestion spike for <br />GFAA analysis is outside quality control Limits. <br />X - This flag indicates [ha[ 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 outs itle quality control <br />limits. <br />- This flag indicates a percent recovery for a standard <br />is outside quality control limits. <br />Page 6 <br /> <br />