ARCHIVED REPORTS_SITE INVESTIGATION REPORT

Home Browse Search

rHE TWININGEPA 8021 (MTBE/BTEX) B EPA 8015M (TPH-Gasoline) ST.I8Bt n e o e a r o e i e s , i e c . LABORATORY CONTROL SPIKE FRESNO/MODESTO/VISAIA/BAKEnFIEO/SAUNAS QUALITY CONTROL REPORT Analyzed By: Eric Scoff Reviewed By:Shankar Sharmasarkar, Ph.D. Date of Extraction:06/01/02 Date of Analysis: 06/01/02 Twining Laboratories,Inc.Run ID Number:060102 Sample Matrix:SOIL Spike ID:WS-1000 Constituent Method Blank Laboratory Laboratory Laboratory Acceptable Laboratory Laboratory Relative Concentration Contra]Spike ControlSpike Control Spike Percent Control Spike Control Spike Percent (mg/kg) Concentration Recovery Duplicate Recevery Range Percent Duplicate Difference Level (mg/kg) Recovery (°/B) Recovery Percent (%) (mg/kg) (mg/kg) Low High (%) Recovery MTBEBTEX Surrogate(4-B romofluorobenzene) 0.00 0.0625 0.0659 0.0634 80% 120% 105 101 3.87 ethyl Tertiary Butyl Ether 0.00 0.250 0.232 0.216 80% 120% 92.8 86.3 7.28 Benzene 0.00 0.0500 0.0510 0.0532 80% 120% 102 1Ethyl06 4.22 Toluene 0.00 0.0500 0.0521 0.0526 80% 120% 104 105 0.955 Xylenes enzene 0.00 0.0500 0.0480 0.0528 80% 120% 106 9.52 Xylenes 0.00 0.150 0.159 0.157 80% 120% 106 105 1.39 H_Gasoline Surrogate(a a a-Trifluorotoluene) 0.00 0.0625 0.0574 0.0547 80% 120% 91.84 87.52 4.82 H-Gasoline 0.00 2.50 2.19 2.26 80% 120% 87.7 90.2 2.89 EXPLANATIONS: ND Non-Detectable;the target analyte was not found above the detectable limit for reporting purposes(DLR). mg/kg milligrams per kilogram,parts per million(ppm)concentration units. Method Blank: The method blank is used to determine if method analytes or other interferences are present in the laboratory environment,the reagents or equpiment. laboratory Control Spike: A laboratory control spike is generated by adding the target analyte(s)into a relatively inert matrix(sodium sulfate or distilled water). The laboratory control sample is analyzed exactly like a sample,and its purpose is to determine whether the methodology is controlled and the laboratory is capable of making precise and accurate measurements.