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THE BASE, NEUTRAL AND ACIDIC SEMIVOLATILES T*IXING EPA METHOD 8270 ESTJ 89 L A l3 O R A T O R I E S I N C MATRIX SPIKE FRESNO/MODMO/YISALIA/BANERSFIELD/SAUNAS QUALITY CONTROL REPORT Analyzed By: Chris Fammatre Reviewed By:Joseph Ureno Date of Extraction:02/28/03 Date of Analysis: 02/28/2003 Twining Laboratories, Inc. Run ID Number:TL002282003 Sample Matrix: Soil Sample:TAP WATER Spike ID:WS 1765 Constituent Matrix Sample Matrix Spike Matrix Spike Matrix Spike Acceptable Matrix Spike Matrix Spike Relative Concentration Concentration Recovery Duplicate Percent Percent Duplicate Percent (ug/L) Level (ug/L) Recovery Recovery Recovery Percent Difference (ug/L) (ug/L) Range (%) Recovery (%) Phenol 0.00 100.0 49.0 51.3 5% 112% 49.0 51.3 4.59 -Chlorophenol 0.00 100.0 35.6 36.4 23% 134% 35.6 36.4 2.22 1,4-Dichlorobenzene 0.00 50.0 10.7 10.4 20% 124% 21.4 20.8 2.84 -Nitrosodi-n-propylamine 0.00 1 50.0 17.3 17.0 10% 230% 34.6 34.0 1.75 1,2,4-Trichlorobenzene 0.00 50.0 25.7 26.0 44% 142% 51.4 52.0 1.16 Chloro-3-methylphenol 0.00 100.0 117.0 118.0 22% 147% 117 118 0.851 cenapthene 0.00 50.0 28.8 28.6 47% 145% 57.6 57.2 0.697 LNitrophenol 0.00 100.0 23.3 24.0 10% 132% 23.3 . 24.0 2.96 ,4-Dinitrotoluene 0.00 50.0 44.5 43.3 39% 138% 89.0 86.6 2.73 Pentachlorophenol 0.00 100.0 27.8 27.9 14%1176%1 27.8 27.9 0.359 ene 0.00 50.0 38.4 37.0 52%1115%1 76.8 1 74.0 1 3.71 XPLANATIONS: ND Non-Detectable;the target analyte was not found above the detectable limit for reporting purposes(DLR). ug/L micrograms per Iiter,parts per billion(ppb)concentration units. Matrix Sample: The matrix sample is the sample chosen for use in the matrix spike analyses. Matrix Spike: A matrix spike is generated by adding the target analyte(s)into the sample noted above. The matrix spike sample is analyzed exactly like a regular sample,and its purpose is to determine whether the sample matrix has a measurable effect on precise and accurate analyte detection and quantification.