Source Zone Delineation Demonstration Report - Triad Resource ...

in soil extracted with distilled water were 17 g/kg, 26 g/kg, 17 g/kg, and 16 g/kg, respectively.Project reporting limits for soil extracted with methanol were significantly higher (ranged from 800 g/kgto 6,400 g/kg) due to the large dilution factor required for the methanol-extracted analysis. During theWireline CPT soil investigation, 230 quality assurance (QA) samples were analyzed. The QA samplesincluded continuing calibration check samples, blanks, matrix spike samples, and PEC samples. Asummary of the total analysis according to the QA sample type and the frequency of the QA analysisduring the demonstration is provided in Table 3-1. No QA problems were encountered during theWireline CPT demonstration and all QA sample analyses met the data QA limits specified for the project.Between the daily calibrations conducted between 28 August 2002 and 29 August 2002, the workingstandard solutions were remade from the 4,000 ng/L stock solution. Vinyl chloride was not added to theworking stock solutions (40 ng/L and 400 ng/L) prepared on 29 August 2002. Since no vinyl chloridehad been detected at the site during the previous seven days of the demonstration, it was decided by theproject Core Technical Team that it was not necessary to include this analyte in the stock solution.Table 3-1. Summary of Wireline CPT QA Sample AnalysesQA Sample TypeTotal QA SampleAnalysisAverage Number of SoilSamples per QA SampleAnalysisContinuing Calibration 74 8Blank 78 8Matrix spike 35 17Performance evaluation check samples 43 14March 2003 3-7 OU 12 Demonstration ReportFinal