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II i <br /> QUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL DATA REPORT <br /> JANUARY 16, 1992 <br /> TREATEK INC. <br /> LOG #270-92A THROUGH 285-92A <br /> DATE EXTRACTED: JANUARY 9, 1992- TPH, EDB, LEAD: <br /> DATE ANALYZED: JANUARY 9, 1992- TPH, EDB <br /> JANUARY 13, 1992- LEAD <br /> t <br /> ANALYSES PREP/ANALYSIS LCS SPIKE DUPLICATE <br /> METHOD RECOVERY %RECOVERY RPD <br /> TPH 3550/DHS EXT 103% 102% 0% <br /> (LOG #270-92S THROUGH 279-92A) <br /> TPH 3550/DHS EXT 103% 98% 1% <br /> (LOG #280-92S THROUGH 285-92A) <br /> EDB MOD 504 97% 106% 0% <br /> LEAD 3050/6010 97% 94% 6% <br /> i <br /> ALIS&A CLEL <br /> QA/QC DIRECTOR <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. ACCEPTALBE RANGE IS 80%-120% RECOVERY. <br /> •SPIKE - ENVIRONMENTAL SAMPLE IS MATRIX SPIKED WITH METHOD COMPOUNDS AND % RECOVERY OF tONCENTRATION SPIKED <br /> INTO SAMPLE IS CALCULATED. REPORTED AS % RECOVERY. ACCEPTABLE RANGE FOR "NORMAL MATRIX SAMPLE" IS T5%-125% <br /> RECOVERY. <br /> •SURROGAIES - 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 />