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QUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL DATA REPORT <br /> AUGUST 26, 1991 <br /> ADVANCED SCIENCES, INC. (ASI) <br /> LOG #12144-91 THROUGH 12146-91 <br /> DATE EXTRACTED: AUGUST 15, 1991 <br /> DATE ANALYZED: AUGUST 15, 1991 <br /> ANALYSES METHOD CCCV SPIKE DUPLICATE <br /> %RECOVERY %RECOVERY RPD <br /> TPH DHS 98% 97% 0% <br /> N <br /> x <br /> L S L <br /> QA/QC DIRECTOR <br /> QUALITY CONTROL TERMINOLOGY <br /> *CCCV-CONTINUING CALIBRATION CURVE VERIFICATION. REPORTED AS%RECOVERY OF AN INDEPENDENT STANDARD TO VERIFY <br /> LINEARITY OF THE OPERATING STANDARD CURVE.ACCEPTABLE RANGE IS 80%-120%RECOVERY. <br /> SPIKE-ENVIRONMENTAL SAMPLE IS MATRIX SPIKED WITH METHOD COMPOUNDS AND%RECOVERY OF CONCENTRATION SPIKED INTO <br /> SAMPLE IS CALCULATED.REPORTED AS%RECOVERY.ACCEPTABLE RANGE FOR'NORMAL MATRIX SAMPLE'IS 75%-125%RECOVERY. <br /> .SURROGATES-COMPOUNDS REPRESENTATIVE OF A GROUP OF COMPOUNDS.SURROGATES ARE SPIKED INTO ENVIRONMENTAL SAMPLES <br /> AND%RECOVERY OF CONCENTRATION SPIKED IS CALCULATED AND REPORTED.ACCEPTABLE RANGE VARIES DEPENDING ON SAMPLE <br /> MATRIX AND ANALYSIS METHOD. <br />