Laserfiche WebLink
SECOR <br /> Number of Number of <br /> Constituents Wells Detections Minimum Maximum <br /> Analyzed above the Concentration in Concentration in <br /> Methanol MRL P9/L (Well ID) Ng/L (Well ID) <br /> Definitions: 18 0 not detected above MRL not detected above MRL <br /> MRL = Method Reporting Limit <br /> Pg/L = Micrograms per Liter <br /> = <br /> Not applicable <br /> • Quality Assurance (QA)/Quality, Control (QC) Samples: <br /> o Trip Blanks: Two trip blanks (QCTBs) were submitted for analysis. Analytes <br /> were not detected at or above laboratory method reporting limits (MRLs) in any of <br /> the trip blanks. <br /> o Equipment Blanks: Two equipment blanks were collected (QCEB-1 and <br /> QCEB-2) on February 7, 2006. None of the analytes were detected at or above <br /> laboratory MRLs in any of the equipment blanks. <br /> • General Laboratory Notes: The method reporting limit for TPHd was increased due to <br /> • interference from gasoline-range hydrocarbons for samples TS-8, AR/MW-1A. <br /> AR/MW-50, AR/MW-24, and TO/R-1. Hydrocarbons reported as TPHd did not exhibit a <br /> typical diesel chromatographic pattern for samples TS-1 and AR/MW-11A. The method <br /> reporting limit for ethanol was increased due to the presence of an interfering compound <br /> for sample AR/MW-12A. The method reporting limit for methanol was increased due to <br /> the presence of an interfering compound for samples TONT-1 and TONT-2. TBA results <br /> for sampleTO/T-1 may be biased slightly high and are flagged with a U. A fraction of <br /> MTBE (typically less than one percent converts to TBA during the analysis of water <br /> samples. The laboratory considers this conversion effect to be mathematically <br /> significant in samples that contain MTBE/TBA in ratios of over 20:1. <br /> • Duplicate Samples (QCDUP): SECOR collected a duplicate sample from well <br /> SP/WC-1S (labeled QCDUP-2). A comparison of the analytical results is presented <br /> below. <br /> Analyte Sample # Sample # % Difference <br /> SP/WC-1S QCDUP-2 <br /> TPHd (p b) <50 <50 00 <br /> TPH (ppb) <50 <5p o <br /> 0/o <br /> Benzene b <0.50 <br /> MTBE ppb) 0.51 <br /> 0.55 7.2% <br /> 4.3 "A" Zone SPH and Hydrocarbon Concentration Trends <br /> Measurable SPH or a visible sheen has historically been reported during at least one monitoring <br /> event in fourteen "A" zone wells that are currently part of the MRP (AR/MW-3A, AR/MW-8A, <br /> STTC 1Q06 Final Report 6 May 1,2006 <br /> 770T.43673.12.0002 <br />