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QUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL DATA REPORT <br /> • <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 1065 1125 11% <br /> r <br /> �xLis, A MA <br /> C L <br /> 6i <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 CONCENTRATION SPIKED <br /> INTO SAMPLE IS CALCULATED REPORTED AS % RECOVERY. ACCEPTABLE RANGE FOR "NORMAL MATRIX SAMPLE" IS 75%-125% <br /> RECOVERY <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 />