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Case Narrative C <br /> Client:Antea USA, Inc. TestAmerica Job ID: 720-41618-1 <br /> Project/Site: UPRR-Stockton <br /> Job ID: 720-41618-1 <br /> Laboratory:TestAmerica Pleasanton <br /> Narrative <br /> Job Narrative <br /> 720-41618-1 <br /> Comments <br /> No additional comments. <br /> Receipt <br /> The samples were received on 4/17/2012 6:09 PM;the samples arrived in good conditions,properly preserved and on ice. The <br /> temperatures of the 2 coolers at receipt time were 3.70 C and 4.20 C. <br /> GC/MS VOA <br /> Method 8260B:The matrix spike/matrix spike duplicate(MS/MSD)percent recoveries and%RPD for batch#112057 were outside control <br /> limits.This is attributed to matrix interferences. <br /> Method 82608:The continuing calibration verification(CCV)associated with batch#112057 recovered above the upper control limit for <br /> Vinyl acetate. The samples associated with this CCV were non-detects for the affected analytes;therefore,the data have been reported. <br /> The following samples are impacted: (CCVIS 720-112057/2). <br /> Method 8260B:The matrix spike/matrix spike duplicate(MS/MSD)recoveries for batch#112064 were outside control limits. The <br /> associated laboratory control sample(LCS)recovery met acceptance criteria. <br /> Method 8260B: Internal standard responses were outside of acceptance limits for the following samples: B17-1.0-1.5(720-41618-23), <br /> 137-1.0-1.5(720-41618-19),B16-1.0-1.5(720-41618-22), B20-2.0-2.5(720-41618-28). The samples shows evidence of matrix <br /> interference.The result was confirmed by reanalysis. <br /> Method 8260B:The matrix spike/matrix spike duplicate(MS/MSD)recoveries for batch 112352 were outside control limits. The <br /> associated laboratory control sample(LCS)recovery met acceptance criteria. <br /> Method 82608:Surrogate recovery for the following sample was outside control limits:B20-2.0-2.5(720-41618-28). Evidence of matrix <br /> interference is present;re-analysis was performed. <br /> No other analytical or quality issues were noted. <br /> GC/MS Semi VOA <br /> Method 8270C SIM:The following sample was diluted due to the abundance of non-target analytes: B17-1.0-1.5(720-41618-23), <br /> B20-2.0-2.5(720-41618-28), 137-1.0-1.5(720-41618-19). Elevated reporting limits(RLs)are provided. <br /> No other analytical or quality issues were noted. <br /> GC VOA <br /> No analytical or quality issues were noted. <br /> GC Semi VOA <br /> Method 80158:The continuing calibration verification(CCV)associated with batch 112106 recovered above the upper control limit for <br /> C24-36. The samples associated with this CCV were non-detects for the affected analytes;therefore,the data have been reported. The <br /> following samples are impacted: (720-41618-32 MS), (720-41618-32 MSD), (MB 720-112125/1-A),133-4.5-5.0(720-41618-32). <br /> Method 801513: Due to the level of dilution required for the following sample,surrogate recoveries are not reported:138-1.5-2.0 <br /> (720-41618-4),B17-1.0-1.5(720-41618-23), B10-1.0-1.5(720-41618-14),B16-1.0-1.5(720-41618-22), 132-1.0-1.5(720-41618-17), <br /> B20-2.0-2.5(720-41618-28), 137-1.0-1.5(720-41618-19). <br /> Method 8081A: Due to the level of dilution required for the following sample,surrogate recoveries are not reported:B10-1.0-1.5 <br /> (720-41618-14), 137-1.0-1.5(720-41618-19). <br /> Method 8081A:The following sample was diluted due to color,appearance,etc.»:B10-1.0-1.5(720-41618-14), 137-1.0-1.5 <br /> TestAmerica Pleasanton <br /> Page 4 of 145 4/26/2012 <br />