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'_C9~"~ <br />CORE LABORATORIES <br />D U A L I T Y A S S U R A N C E M E T H O D S <br />R E F E R E N C E S A N D N O T E S <br />Report Date: ttl23 /97 <br />Lore Laboratories - Gulf States - Nouston, TX ' HE <br />Core Laboratories - Houston, TX + HP <br />Core Laboratories - Irxfianapolis, IN + IN <br />Core Laboratories - Lake Lharles, LA • LC <br />Core Labora[ori es - Long Beach, CA • LB <br />Core Laboratories - Tampa, FL • TP <br />Core Laboratories - Valparaiso, IN • VP <br />Other Subcontract Laboratories • XX <br />EXPLANATION OF DATA QUALIFIERS - ORGANIC PARAMETERS <br />U - This qualifier indicates that the analyte was analyzed <br />for but nat detected. <br />J - This qualifier indicates that [he value is an estimate. <br />It is used when a compound is determined to be present <br />based on [he mass spectral data but a[ a concentration <br />less than the practical quantitation limit of [he <br />method. <br />E - This qualifier indicates that a sample result is an <br />estimate because the concentration exceeded the upper <br />tali brati on range of the instrument. <br />EXPLANATION OF DATA QUALIFIERS - 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 ins Trument detection limit. <br />EXPLANATION OF DATA FLAGS - ALL PARAMETERS <br />B - This flag irxficates that an anal y[e 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 sanple 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 for a standard <br />is outside quality control limits. <br />Page 3 <br />i~,..~m~~,...~. ~wro.. w.,,~.w.. ma.-w~i,~~.,~., ~.. ,.oe~,,. u~ „ow..,m.~.n,a,.~ m,i.w..oa® m ~i.. o.~i m ..n,...a,,,.. ,~~.aMam,..~.u ~~~,.oe., ~., m~ m.~. ~ ....e~~~n ~„Wia ow.wm o ,~..w.w „w„ <br />..w.,w„w.m~i..~..i wu~~m v.~..o,.wecw.unw.,.,..,.w.....~n..N....,no ~n.,~.~,w~..wmo.,,mao..~.~...~..o~..+n a~a,m...,... ~a w. o-ae.~i is woo. w+,~w sw~~a<....~..m <br />aM O~pu. conwnm mavr ows.+e~u.u ~n u~rycicn ~nn...~n ucn rsrn nuwla•wat~wanW a+r~a^+m nv~iaw~iM ~~ort w~~du vnb-.N .+hwmom ~~~en~m ~mm ecwwY MCa+aaW a~c~w-. <br />