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FLAB CORE LABORATORIES Q U A L I T Y A S S U R A N C E M E T H O D S REFERENCE S A N O N O T E S Report Date: 08/23/97 Core Laboratories - Gulf States - Houston, TX ' HE Core Laboratories - Hous [on, TX ` HP Core Laboratories - Indianapof is, IN • IN Core Laboratories - Lake Lharles, LA ` LC Lore Laboratories - Long Beach, LA • L8 Core Laboratories - Tampa, FL • TP Core laboratories - Valparaiso, IN • VP Other Subcontract Laboratories ` xx EXPLANATION OF DATA DUALIFIERS - ORGANIC PARAMETERS U - This qualifier indicates that the analyte was analyzed for but not detected. J - This qualifier indicates that the value is an estimate. It is used when a corgwund is determined to be present based on the mass spectral data but at a concentration less than the practical quanti Cation limit of the method. E - This qualifier indicates that a sample result is an estimate because the concentration exceeded the upper calibration range of the instrument. EXPLANATION OF DATA OUALI FIERS - METALS 8 INORGANIC PARAMETERS U - This qualifier irdicat es that the analyte was analyzed for but not detected. B - This qualifier indicates that the analyte was detected at a level below the reporting limit but greater than or equal to the instrument detection limit. E%PLANATION OF DATA FLAGS - ALL PARANETERS B - This flag indicates that an analyte is present in the method blank as well as in the sample. The client should consider this when evaluating the data. E - This flag indicates the reported value is estimated due to sample matrix interference. N - This flag indicates that a post-digestion spike for GFAA analysis is outside quality control limits. X - This flag indicates that a surrogate recovery is outside quality control Limits. Y - This flag indicates a spike or spike duplicate recovery is outside quality control limits. Z - This flag indicates a relative percent difference for a spike and spike duplicate is outside quality control limits. • - This flag indicates a relative percent difference for a duplicate analysis is outside quality control Limits. - This flag indicates a percent recovery for a standard is outside quality coot rot Limits. Page 3 .~M Y. ~~ ~, o .~~...~. a~...~L~..~a., ~o.Mem..•.~~.,~~ ~~nm~,,..., a •.., ~~ ~~.M,..~~.~.,.e.,. ~, ...~„ ~.~~ M~ d .~ ~ to . -ro. ~. .~d~ ..~.,,~ ~~..~eaa.. a ~s. ~..~o..,