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I <br /> I� I <br /> QUALITY ASSURANCE L 1ABQRATORY <br /> QUALITY CONTROL DATA REPORT <br /> 3i <br /> i <br /> August 15, 1994 1fi <br /> TREATEK INC. <br /> ia. <br /> SAMPLE LOG #12701-9408 THROUGH 12703-9408 <br /> DATE ANALYZED: AUGUST 11, 1994 <br /> EXTRACTION METHOD: 5030 <br /> ANALYSIS METHOD: 8020 h <br /> METHOD BLANK <br /> NO TARGET ANALYTES WERE DETECTED INIMETHOD BLANK. <br /> LABORATORY CONTROL STANDARD l <br /> .a <br /> LCS <br /> COMPOUND a %RECOVERY <br /> Benzene 97% <br /> Toluene 104% <br /> Ethylbenzene 82% <br /> Xylenes ' 90% <br /> SPIKE DATA <br /> .i <br /> COMPOUND SPIKE IRELATIVE <br /> % RECOVERY ' DIFFERENCE <br /> Benzene 220% 'k 7% <br /> Toluene 115% 1 13% <br /> Ethylbenzene 99% i{ 1 7% <br /> Xylenes 108% 61% <br /> i� <br /> 'f <br /> 3 <br /> j <br /> 11 <br /> REBECCA L. RUSH <br /> QA/QC SPECIALIST <br /> l <br /> i' <br /> QUALITY CONTROL TERMINOLOGY I� <br /> LABORATORY CONTROL STANDARD.REPORTED AS%RECOVERY OF AN INDEPENDENT STANDARD CARRIED THROUGH ALL SAMPLE PREPARATION <br /> PROCEDURES TO VERIFY METHOD PERFORMANCE.ACCEPTABLE RANGE IS BASED ON HISTORICAL LABORATO RY CONTROL DATA AND EPA REQUIREMENTS. <br /> ANY OUT-CF-CONTROL OC DATA IS CLEARLY INDICATED. i1 <br /> MIKE-ENVIRONMENTAL SAMPLE IS MATRIX SPIKED WITH METHOD COMPOUNDS AND % RECOVERY OF GONCENTRATK)N SPIKED INTO SAMPLE IS <br /> CALCULATED.REPORTED AS%RECOVERY.ACCEPTABLE RANGE FOR"NORMAL MATRIX SAMPl l5 BASED ON HISTORICAL LABORATORY CONTROL DATA. <br /> ANY OUT-OF-CONTROL QC DATA IS CLEARLY INDICATED. 11 ,if I <br /> SURROGATES-COMPOUNDS REPRESENTATIVE OF AGROUP OF COMPOUNDS.SURROGATES ARE SPIKED INTO ENVIRONMENTAL SAMPLES AND%RECOVERY <br /> OF CONCENTRATION SPIKED IS CALCULATED AND REPORTED.ACCEPTABLE RANGE VARIES DEPENDING ON SAMPLE MATRIX AND ANALYSIS METHOD. ANY <br /> OUT-OF-CONTROL DATA IS CLEARLY INDICATED. <br /> f <br />