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TAtJ—gig-1yyL 1 1-1 FFO9 TPEHTFF, Ilan TO 9--4640132 P 04 <br /> QUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL DATA REPORT <br /> JANUARY 24 , 1992 <br /> TREATEK INC. <br /> LOG #946-92A THROUGH 947-92A <br /> DATE EXTRACTED: JANUARY 20, 1992— TPH <br /> DATE ANALYZED: JANUARY 20, 1992— TPH <br /> ANALYSES PREP/ANALYSIS LCS SPIKE DUPLICATE <br /> METHOD $ RECOVERY %RECOVERY RPD <br /> TPH 3550/DHS EXT 106% 112% 11t <br /> i <br /> 1/;7 <br /> LISA MAC L , <br /> QA/QC DIRECTOR <br /> aAALITY CONTROL TERMINOLOGY <br /> •LCS - LABORATORY CONTROL STANDARD REPORTED AS % RECOVERY [F AN INDEPENDENT STANDARD CARRIED THROUGH ALL <br /> SAMPLE PREPARATION PROCEDURES TO VERIFY METHOD PERFORMANCE ACCEPTALBE RANGE IS 80%-120% RECOVERY. <br /> • *SPIKE - ENVIRONMENTAL SAMPLE IS MATRIX SPIKED WITH METHOD COMPOUNDS AND % RECOVERY OF CONCENTRATION SPIKED <br /> INTO SAMPLE IS CALCULATED REPORTED AS % RECOVERY ACCEPTABLE RANGE FOR "NORMAL MATRIX SAMPLE" IS 75%-375% <br /> RECOVERY. <br /> aSMRO1GATES - COMPOUNDS REPRESENTATIVE OF A GROUP OF COMPOUNCS SURROGATES ARE SPIKED INTO ENVIRONMENTAL <br /> SAMPLES AND % RECOVERY OF CONCENTRATION SPIKED IS CALCULATED AND REPORTED ACCEPTABLE RANGE VARIES DEPENDING <br /> ON SAMPLE MATRIX AND ANALYSIS METHOD <br />