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QUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL DATA REPORT <br /> 1 <br />' OCTOBER 1, 1992 <br /> TREATEK <br />' LOG #16124-921 THROUGH 16128-921 <br />' DATE EXTRACTED: SEPTEMBER 21, 1992- TPH <br /> SEPTEMBER 23 , 1992- LEAD <br /> DATE ANALYZED: SEPTEMBER 24 , 1992- TPH <br />' SEPTEMBER 25, 1992- LEAD <br /> 1 <br /> ANALYSES ANALYSIS LCS SPIKE DUPLICATE <br />' METHOD RECOVERY %RECOVERY RPD <br /> TPH 3550/DHS EXT 99% 118% 70 <br /> LEAD 3050/6010 105% 105% 4% <br /> I I <br /> 1 <br />' YVETTE J. LIEBESMAN <br /> QA SPECIALIST <br /> QUALITY CONTROL TERMINOLOGY <br /> •LCS - LABORATORY CONTROL STANDARD REPORTED AS % RECOVERY OF AN INDEPENDENT STANDARD CARRIED THROUGH ALL <br /> SAMPLE PREPARATION PROCEDURES TO VERIFY METHOD PERFORMANCE ACCEPTABLE RANGE IS BASED ON HISTORICAL <br />' LABORATORY CONTROL DATA, BUT IS GENERALLY WITHIN A 80%-120% RECOVERY RANGE <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 BASED ON <br /> HISTORCCAL LABORATORY CONTROL DATA, BUT IS GENERALLY WITHIN A 75%-125% RECOVERY RANGE <br /> *SURROGATES - COMPOUNDS REPRESENTATIVE OF A GROUP OF COMPOUNDS 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 />