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Stantec <br /> ' L &M OPERABLE UNIT-THIRD QUARTER 2010 SITE STATUS, REMEDIAL SUMMARY, <br /> AND GROUNDWATER MONITORING REPORT <br /> Groundwater Monitoring and Sampling <br /> October 27, 2010 <br /> 2.5.2.4 Semi-volatile Organic Compounds <br /> There were no SVOCs with concentrations at or above the MRLs during the third quarter 2010. <br /> ' 2.5.2.5 Dissolved Metals <br /> Dissolved metals with concentrations detected at or above the MRLs are summarized below. <br /> Arsenic 7 8 0.0070 MW-61 0.031 MW-54 <br /> ' Chromium 1 8 0.0088 MW-63 <br /> Copper 1 8 0.0054 MW-63 <br /> Zinc 3 8 0.010 MW-63 0.017 MW-62 <br /> ' Definitions: <br /> ID = Identification <br /> mg/L = Milligrams per Liter <br /> MRL = Method Reporting Limit <br /> ' = Not Applicable <br /> ' 2.5.2.6 Quality Assurance/Quality Control Samples <br /> Duplicate sample QCDUP-5 was collected from L&M OU C-Zone well MW-61 during the third <br /> quarter 2010 sampling event. A comparison of the samples is shown below. <br /> TPH (mg/L <0.05 <0.05 0% <br /> TPHd (mg/L 0.054 <0.05 NA <br /> TPHo (mg/L <0.05 <0.05 0% <br /> ' Benzene (mg/L <0.0005 <0.0005 0% <br /> MtBE (mg/L <0.0005 <0.0005 0% <br /> TBA (mg/L <0.005 <0.005 0% <br /> ' 2.5.2.7 General Laboratory Notes <br /> ' The laboratory validation issues are consistent with the C-Zone quality assurance and quality <br /> control. Each set of issues corresponds directly with the denoted report. All laboratory reports <br /> are included in Appendix C. <br /> ' [NndeweWhTM Sbckt (Pa l2A- 415)\Repoft4MR1201013Q1013p70QSSRQRSROMR St aM FMAL.d. 2.14 <br />