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q <br /> lQUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL DATA REPORT <br /> FEBRUARY 6, 1992 <br /> TREATEK, INC. "s Fn I:x <br /> LOG #276-92A THROUGH 280-92A <br /> DATE ANALYZED:` FEBRUARY 3, 1992 <br /> DATE EXTRACTED: FEBRUARY 6, 1992 ifs <br /> ANALYSES PREP/ANALYSIS LCS SPIKE DUPLICATE <br /> . METHOD RECOVERY %RECOVERY RPD <br /> LEAD DHS 100% 95% 7% <br /> 3 <br /> � I <br /> i <br /> i <br /> r <br /> \QA <br /> CCLELLAN <br /> IRECTOR <br /> ROL TERMINOLOGY <br /> Y CONTROL STANDARD., REPORTED AS X RECOVERY OF AN INDEPENDENT STANDARD CARRIED THROUGH ALL <br /> ' PROCEDURES TO VERIFY METHOD PERFORMANCE. ACCEPTABLE RANGE IS 80%-120% RECOVERY. <br /> TAL SAMPLE IS MATRIX SPIKED WITH METHOD COMPOUNDS AND % RECOVERY OF CONCENTRATION SPIKED <br /> TED. REPORTED AS X RECOVERY. ACCEPTABLE RANGE FOR "NORMAL MATRIX SAMPLE" IS 75X-125% <br /> REPRESENTATIVE OF A GROUP OF COMPOUNDS. SURROGATES ARE SPIKED :INTO ENVIRONMENTAL <br /> CONCENTRATION SPIKED IS CALCULATED AND REPORTED. ACCEPTABLE RANGE VARIES DEPENDING <br /> ` IS METHOD. <br />