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Paragon Analytics <br />Radiochemistry Case Narrative <br />Gross Alpha/Beta <br />CEMEX, Inc. <br />PAI WO 0407037 <br />1. This report consists of the analytical results for one water sample received by Paragon on 7/2/04. <br />2. This sample was prepared according to Paragon Analytics procedure SOP702R16. <br />3. The sample was analyzed for gross alpha and beta activity by gas flow proportional counting <br />according to Paragon Analytics procedure SOP724R8. The analyses were completed on 7!19/04. <br />Gross alpha results are referenced to 241Am. Grass beta results aze referenced to 90Sr/Y. <br />4. The analysis results for this sample are reported in units of pCi/L. The sample was not filtered prior to <br />analysis. <br />5. Following an extended count the requested MDC for gross alpha beta for this sample and associated <br />QC was not achieved due to the presence of elevated levels of dissolved /suspended solids native to <br />the sample. The requested method limits the amount of sample solids residue taken for analysis to 5 <br />mg/cmZ. If desired, alternative methodologies for grass alpha are available which can generally <br />address solids interference in water samples. These samples aze identified with an "M" or "M3" flag <br />on the final reports. The reported gross alpha beta activity for samples with an "M3" flag exceeds the <br />achieved MDC. <br />6. The magnitude of the negative activity for sample C-Pit (PA ID 0407037-1) is greater than the 2 <br />sigma TPU. The analyst's review of the data does not indicate a problem with the instrument data or <br />the subsequent reporting systems. The data quality is not believed to be affected and the results aze <br />submitted without qualification. Under typical conditions, where background level sample data is <br />normally distributed and analyzed by paired observations, this event is likely to occur at least 2.5% of <br />the time. <br />7. No anomalous situations were encountered during the preparation or analysis of this sample. ALl <br />quality control criteria were met. <br />The data contained in the following report have been reviewed and approved by the personnel listed <br />below. In addition, Paragon Analytics certifies that the analyses reported herein are true, complete and <br />correct within the limits of the methods employed. <br />~ • ~ •ut <br />Radiochemi)snt~ryl' Instrument Technician Date <br />Radiochemistry Final Data Review pate <br />~'~ <br /> <br />PARAGON ANALYTICS <br />