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QUALITY ASSURANCE LABORATORY <br /> QUALITY CONTROL REPORT <br /> 1 JUNE 16, 1994 <br /> NINYO & MOORE <br /> LOG #9533-9406 THROUGH 9535-9406 <br /> IDATE EXTRACTED: <br /> JUNE 6, 1994- TPH-DIESEL <br /> DATE ANALYZED: <br /> JUNE 9, 1994- TPH-GAS (LOG# 9534-9406) 1 <br /> JUNE 14 , 1994- TPH-GAS (LOG# 9533-9406, 9535-9406) 2, <br /> IBENZENE, TOLUENE, ETHYLBENZENE, XYLENE <br /> ANALYSES PREP/ANALYSIS LCS SPIKE DUPLICATE <br /> METHOD RECOVERY %RECOVERY RPD <br /> TPH-GAS' 5030/DHS 102% <br /> TPH-GAS2 5030/DHS 87% <br /> TPH-DIESEL SLC 816/DHS 117% 73% 3% <br /> BENZENE 5030/8020 95% 97% 2% <br /> TOLUENE 5030/8020 91% 94% 3% <br /> ETHYLBENZENE 5030/8020 76% 76% 0% <br /> XYLENE 5030/8020 98% 95% 3% <br /> TIMOTHY OLLIN <br /> DIRECTOR OF QA/QC <br /> QUALITY CONTROL TERMINOLOGY <br />' = LABORATORY CONTROL STANDARD REPORTED AS%RECOVERY OF AN INDEPENDENT STANDARD CARRIED THROUGH ALL SAMPLE PREPARATION <br /> PROCEDURESTOVERIFYMETHOD PERFORMANCE ACCEPTABLE RANGE IS BASED ON HISTORMAL LABORATORY CONTROL DATA AND EPA REQUIREMENTS <br /> ANY OUT-OF-CONTROL QC DATA IS CLEARLY INDICATED <br /> SPIKE -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 MATRD(SAMPLE'IS BASED ON HISTORICAL LABORATORY CONTROL DATA <br /> ANY OUT-OF-CONTROL OC DATA IS CLEARLY INDICATED <br /> 4MRI102AT,,F¢ COMPOUNDS REPRESENTATIVE OFAGROUPOF COMPOUNDS SURROGATES ARE SPIKED INTO ENVIRONMENTAL SAMPLESAND%RECOVERY <br /> OF CONCENTRATION SPIKED IS CALCULATED AND REPORTED ACCEPTABLE RANGE VARIES DEPENDING ON SAMPLE MATRIX AND ANALYSIS METHOD ANY <br /> OUT-0F-CONTROL DATA 43 CLEARLY INDICATED <br />