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QUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL DATA REPORT <br /> i August 15, 1994 <br /> TREATEK INC. q <br /> LOG #12701-9408 THROUGH 12703-9408 <br /> DATE ANALYZED; <br /> AUGUST 11, 1994- TPH-GASOLINE <br /> f� I� <br /> ANALYSES PREP/ANALYSIS LCS ;SPIKE DUPLICATE <br /> METHOD %RECOVERY i %RECOVERY RPD <br /> TPH-GASOLINE 5030/DHS 99% 79% 7% <br /> I <br /> i <br /> J1 <br /> I I <br /> 16 <br /> I I' 1 <br /> d <br /> I <br /> REBECCA L. RUSH <br /> QA/QC SPECIALIST <br /> i� <br /> :j <br /> QUALITY CONTROL TERMINOLOGY Il. <br /> 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 LABORATORY CONTROL DATA AND EPA REQUIREMENTS. <br /> k ANY OUT-OF-CONTROL QC DATA IS CLEARLY INDICATED. <br /> �WKE - ENVIRONMENTAL SAMPLE IS MATRIX SPIKED WITH METHOD COMPOUNDS AND% RECOVERY OF CONCENTRATION SPIKED INTO SAMPLE IS <br /> CALCULATED.REPORTED AS%RECOVERY.ACCEPTABLE RANG E FOR"NORMAL MATRIX SAMPLE-d5 BASED ON HISTORICAL LABORATORY CONTROL DATA. <br /> ANY OUT-0F-CONTROL OC DATA IS CLEARLY INDICATED. �I <br /> SURROGATES-COMPOUNDS REPRESENTATIVE OF A GROUP OF COMPOUNDS.SURROGATES ARE SPIKED INTO ENVIRONMENTAL SAMPLES AND%RECOVERY <br /> OF CONCENTRATION SPIKED IS CALCULATED AND REPORTED.ACCEPTABLE RANGE VARIES DEPENDING OH SAMPLEMATRI%AND ANALYSIS METHOD. ANY <br /> OUT-0F-CONTROL DATA 15 CLEARLY INDICATED. '� '� <br />