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' QUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL DATA REPORT <br /> October 26, 1994 <br />' TREATEK, INC. <br /> SAMPLE LOG #16580-9410 THROUGH 16582-9410 <br />' DATE ANALYZED: OCTOBER 24, 1994 <br /> EXTRACTION METHOD: 5030 <br /> ANALYSIS METHOD: 601 <br /> II <br /> METHOD BLANK <br />' NO TARGET ANALYTES WERE DETECTED IN THE METHOD BLANK. <br />' LABORATORY CONTROL STANDARD <br /> COMPOUND $ RECOVERY <br /> TRICHLOROETHENE 103$ <br /> CHLOROFORM 110$ <br /> 1, 1+1-TRICHLOROETHANE 93$ <br /> CHLOROBENZENE 110$ <br /> 1, 2 DICHLOROPROPANE 109% <br /> TETRACHLOROETHENE 104% <br /> SPIKE RESULTS l <br /> SPIKE RELATIVE <br /> COMPOUND % RECOVERY % DIFFERENCE <br /> TRICHLOROETHENE 96$ 18% <br /> CHLOROFORM 101$ 16%- <br /> 1, 1, 1-TRICHLOROETHANE <br /> 6$1, 1, 1-TRICHLOROETHANE 89% 16% <br /> CHLOROBENZENE 100% 10$ <br /> 1,2-DICHLOROPROPANE 100% 16$ <br />' TETRACHLOROETHENE 97$ 17$ <br /> A complete list of compounds is available upon request. <br />' W.L. RUSTEBAKKE <br /> QA/QC ANALYST <br /> QUALITY CONTROL TERMINOLOGY <br /> LS•c4-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 /> ANY OUT-OF-CONTROL QC DATA IS CLEARLY INDICATED <br /> SPIKE ENVIRONMENTAL SAMPLE 15 MATRIX SPIKED WITH METHOD COMPOUNDS AND % RECOVERY OF CONCENTRATION SPIKED INTO SAMPLE IS <br /> CALCULATED REPORTED AS%RECOVERY ACCEPTABLE RANGE FOR"NORMAL MATRIX SAMPLE"IS BASED ON HISTORICAL LABORATORY CONTROL DATA <br /> ANY OUT-OF-CONTROL OC DATA IS CLEARLY INDICATED <br /> SBURE92AIIIa COMPOUNDS REPRESENTATIVE OFAGROUP OFCOMPOUNOS SURROGATES ARE SPIKED INTO ENVIRONMENTAL SAMPLES AND%RECOVERY <br /> OF CONCENTRATION SPIKED 15 CALCULATED AND REPORTED ACCEPTABLE RANGE VARIES DEPENDING ON SAMPLE MATRIX AND ANALYSIS METHOD ANY <br /> OUT OF-CCNTROI,DATA IS CLEARLY INDICATED <br />