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~W9E~~ CORE LABORATORIES Cl U A L I T Y A S S U R A N C E M E T~H O D S R~E F~E R E N C E S A N D' N O T E S ~~ -. Report Date: 02/24/98 Lore Laboratories - Gulf States - Houston, T% • NE Core Laboratories - Nouston, T% • HP Core Laboratories - Indianapolis, IN • IN Core Laboratories - Lake Charles, LA • LL Core Laboratories - Long Beach, CA * LB Core Leboratori es - Tampa, FL • TP Core Laboratories - Valparaiso, IN • VP Other Subcontract Laboratories • %% E%PLANATION OF DATA GUALI FIERS - 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 compound is determined to be present based on the mass spectral data but at a concentration less than the practical quantitation limit of the method. E - This qualifier ird icetes that a sample result is an estimate because the concentration exceeded the upper calibration range of the instrument. E%PLANATION OF DATA QUALIFIERS - METALS 8 INORGANIC PARAMETERS U - This qualifier indicates 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 PARAMETERS 8 - This flag indicates that en analyte is present in the method blank es well as in the san~le. The client shou Ld 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 GFM analysis is outside quality control limits. % - 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 control Limits. Page 3 ~..vr..~,..., 0~7, n,.,.~.,o. ~..,a m „~,~.. ~ ~om nb..~o..b ~~....,a.P a ~~ ~ .„ ~n~...4u..~ m~„d~,v u. ~, ~~ n,. ~.., ra ~w w.,..~ ~.Wn..>~~ a.~~.~.e.~ mnv.u ~ a om~.w~. a m. um..>~. w. wo~no... rv..,. ~w...,o ...m. o ~i.a .>.. a~ ~mmea a,M nv.. w..oa.~, a.nm..n...,. io N. ~i,.,~ ~. w..~e. o ~o~„dnm. a vrv d. W. mY a one mti6 v9+M1 v/ w vtl n m.~m MP +.U va DWI Y u~ v r/~a uv~ Iv M ~s~m wv~u.v iti ~pll YW ml b rvmkN n w.~a. e n aw ~nrtui ~ti wui~ W VM of fm uMne~w