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APPENDIX D <br /> QUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL REPORT <br /> JUNE 16, 1994 <br /> NINYO & MOORE <br /> LOG #9536-9406 THROUGH 9537-9406 <br /> DATE EXTRACTED: <br /> JUNE 10, 1994- LEAD <br /> DATE ANALYZED: <br /> JUNE 8, 1994-- TPH-GAS <br /> JUNE 9 , 1994- BENZENE, TOLUENE, ETHYLBENZENE, XYLENE <br /> ANALYSES PREP/ANALYSIS LCS SPIKE DUPLICATE <br /> METHOD $ RECOVERY %RECOVERY RPD <br /> TPH-GAS 3550/DHS 91% <br /> BENZENE 5030/8020 100% 102% 2% <br /> TOLUENE 5030/8020 101% 98% 12% <br /> ETHYLBENZENE 5030/8020 97% 94% 13% <br /> XYLENE 5030/8020 123% 91% 5% <br /> LEAD 3050/7421 93 98% 3% <br /> TIMOTHY OLLIN <br /> DIRECTOR OF QA/QC <br /> QUALITY CONTROL TERMINOLOGY <br /> -j-Q 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 /> -AM-ENVIRONMENTAL SAMPLE IS 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 QC DATA IS CLEARLY INDICATED <br /> -a=09,&M COMPOUN DS REPRESENTATIVE OF A GROUP OF COMPOUNDS SURROGATES ARE SPIKED INTO ENVIRONMENTAL SAMPLESAND%RECOVERY <br /> OF CONCENTRAT"SPIKED IS CALCULATED AND REPORTED ACCEPTABLE RANGE VARIES DEPENDING ON SAMPLE MATRIX AND ANALYSIS METHOD ANY <br /> OUT-OF$ONTROL DATA IS CLEARLY INDICATED <br />