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AIED-Tox <br /> ASSOCIATES INC <br />' PAGE 52 OF 61 <br /> DATE EXTRACTED: 05/07/91 MEQ-TOX JOB NO: 9105035 <br /> DATE ANALYZED: 05/13/91 SAMPLE SPIKED: POLAR WATER <br /> CLIENT PROJ. ID: 10246.19 INSTRUMENT: C <br /> MATRIX SPIKE RECOVERY SUMMARY <br /> TPH EXTRACTABLE WATERS <br /> METHOD 3510 <br />' (WATER MATRIX; EXTRACTION METHOD) <br /> Spike Sample MS MSD Average <br /> Conc. Result Result Result Percent <br /> ANALYTE (mg/L) (mg/L) (mg/L) (mg/L) Recovery RPD <br /> Diesel 0.509 ND 0.371 0.379 73_7 2.1 <br /> CURRENT QC LIMITS (Revised 02/12/91) <br /> Analyte Percent Recovery RPD <br /> Diesel (39.2-106.5) 33.2 <br /> ' MS = Matrix Spike <br /> MSD = Matrix Spike Duplicate <br /> RPD = Relative Percent Difference <br /> ND = Not Detected <br />