HYDRO24688 - Laserfiche WebLink

Home Browse Search

CASE NARRATIVE D4D090366 The following report contains the analytical results for one water sample submitted to STL Denver by Blasland, Bouck & Lee from the Holcim Portland Site. The samples were received April 9, 2004, according to documented sample acceptance procedures. Dilution factors and footnotes have been provided on each data sheet to assist in the interpretation of the results. In some cases, due to interference or analytes present above the linear calibration curve, samples must be analyzed at a dilution. For samples analyzed at a dilution, the reporting limits are adjusted relative to the dilution required. Dilutions made for reasons other than the presence of target compound(s) are addressed in the Supplemental Information Section. STL Denver utilizes USEPA approved methods in all analytical work. The sample presented in this report was analyzed for the parameters listed on the methods summary page in accordance with the methods indicated. QC data for these analyses are included. The results included in this report have been reviewed for compliance with the laboratory QA/QC plan. All data have been found to be compliant with the exception of those items noted. The test results shown in this report meet all requirements of NELAC. Any exceptions are noted in the Supplemental Information Section below. Supplemental QC Information Samole Arrival and Receiat The sample presented in this report was received at the laboratory at a temperature of 5.1°C. No anomalies were observed. Total Metals/200.8/200.7/245.1 Barium and Thallium were detected in the method blank associated with QC batch 4105630. Because the level in the method blank is not present at a level greater than the reporting limit, corrective action was deemed unnecessary. The M,S and/or MSD associated with QC batch 4103233 exhibited percent recoveries and/or RPD data outside control limits for Mercury. The acceptable LCS analysis data indicated that the analytical system was operating within control; therefore, corrective action was deemed unnecessary. The Aluminum and Iron MS/MSD associated with QC batch 4104549 exhibited percent recoveries outside the QC control limits. The acceptable LCS analysis data indicated that the analytical system was operating within control; therefore, corrective action was deemed unnecessary. The MS/MSD associated with QC batch 4105630 was performed using sample MW-10. The MS/MSD exhibited percent recoveries outside the QC control limits for Arsenic, Barium and Vanadium. The acceptable LCS analysis data indicated that the analytical system was operating within control; therefore, corrective action was deemed unnecessary. The Selenium recovery and Relative Percent Difference (RPD) for the MS/MSD associated with QC batch 4105630 could not be calculated because the sample amount was greater than four times the spike amount. The acceptable LCS analysis data indicated that the analytical system was operating within control; therefore, corrective action was deemed unnecessary. No other anomalies were observed 2