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I~RE~~ CORE LABORATORIES Q U A L I T Y A:S.S~U R A N G E M~~E T H~O D S RE F~ERENCE~S~ AND N::O.~~T~~E~S~ Report Date: 04/02/96 ~ ~. MB Method Blank ICB Initial Calibration Blank ~~ CCB Continuing Calibration Blank SPIKE QC SAMPLE IDENTIFICATION MS Method (Matrix) Spike MSD Method (Matrix) Spike Duplicate PDS Post Digestion Spike SB Spiked Hlank SBD Spike Blank Dup licate REFERENCE STANDARD QC SAMPLE IDENTIFICATION LCS Laboratory Control Standard RS Reference Standard ICV Initial Calibration Verification Standard CCV Continuing Calibration verification Standard ISA/ISB ICP Interface Check Sample ICL Initial Calibration/Laboratory Control Sample DSC Distilled Standard Check DUPLICATE QC SAMPLE IDENTIFICATION MD Method (Matrix) Duplicate ED Extraction Duplicate DD Digestion Duplicate Analyses performed by a subcontract laboratory are indicated on the analytical and/or quality control reports under "technician" using the following codes: SUBCONTRACT LABORATORY Core Laboratories Core Laboratories Core Laboratories Core Laboratories Core Laboratories Core Laboratories Other Subcontract - Anaheim, CA - Casper, WY - Corpus Christi, TX - Houston, TX - Lake Charles, LA - Long Beach, CA Laboratories EXPLANATION OF DATA FLAGS CODE + AN + CA + CC + HP + LC * LB + XX B - This flag is used to indicate that an analyte is present in the method blank as well as in the sample. it indicates that the client should consider this when evaluating the results. D - This flag indicates that surrogates were diluted out of calibration range and cannot be quantified. E - Indicates that a sample result is an estimate because the concentration exceeded the calibration range of the instrument. I - Used to indicate matrix interference. J - Indicates that a 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. Page 4 ,~..,.,,.. ~..,. m.o..>,.e...~. ~.e,,.w,~,,,„o..o ~..b,.,a..<n..~.~a a. ~....~.,,.....~,..., tea.,.,.... ~... ~ m,,. ,,..~.,~a ~.. ~. d m.o..~o. ..e.ra m..... er.aa,v. w w. ~.o~ w nano.. b... ~ ~..~.,. s ~~+.o „o.,a.,m a... no ~ wM os~...~.. io ..emma.. om. m.~.> w.s~ e .. a. rn m. o ~.... om.n .. s w ~ m.,no.n.rn nn, ~,. ~..oe: ~, n w+.o..~.. m..a~..,.n a ~eo«..e. ~ o...ao. ~. ~.e. r~ ofa. ~s..e~.