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~' <br />CORE LABORATORIES <br />Q U A L I T Y A S S U R A N C E M E T HOD S <br />R E F E R E N C E S A N D N O T E S <br />Report Dete: 05/29/97 <br />Core Laboratories - Lake Charles, LA • LL <br />Core Laboratories - Long Beach, CA • LB <br />Lore Laboratories - Tampa, FL * TP <br />Core Laboratories - Valparaiso, IN * VP <br />Other Subcontract Laboratories X% <br />EXPLANATION OF DATA DUALI FIERS - ORGANIC PARAMETERS <br />U - This qualifier indicates that the analyte was analyzed <br />for but not detected. <br />J - This qualifier indicates that the value is an estimate. <br />It is used when a conpound 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 sannle result is an <br />estimate because the concentration exceeded the upper <br />calibration range of the instrument. <br />EXPLANATION OF DATA DUALI FIERS - METALS 8 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 below 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 well as in the sample. The client <br />should consider this when evaluating the data. <br />E - This flag indicates the reported value is es [imated due <br />to sale matrix interference. <br />Y - 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 coot raL Limits. <br />Y - This flag indicates a spike or spike duplicate recovery <br />is outside quality coot roL Limits. <br />Z - This flag indicates a re la[ive 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 for a standard <br />is outside quality control limits. <br />Page 3 <br />~~..~~,...~ oo.a.>,,,.,,M.~a.~P~.~~~~~~.~o...o wo .~~m.P.p..~..~.woae,~~.a.+b,.m...~w...~~wa.,W~~..M,~®,~.,e..,,,,,.,M,.,..,~,..~,~.. m.,.,.,o .,~.q., . <br />w.~.n~v..+..e..i wum..~o~co.~.m.~c.. uoo~xw m....m...~..-.~wd-o~~a.•.o..o~n.ra.n..r m. .,e.~.w a.u..,. ~....o .:. am< }} w..~wovwi.s.~.o <br />.,. a w m• vwr~m.•. oeo.n..r s.w.. r~m~.m.irn.~.,.om ~...a d ~+.a ~ e.~.+~.~.i.s.. iw ~~m ti ~ s ~o~.+ ..w. v ~~ a+ wmn v~..a.~wva+a ro. uw.w <br />