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Case Narrative <br /> Client: HydroChemPSC Job ID: 720-96745-1 <br /> Project/Site: R-1036 Tracy,CA <br /> Job ID: 720-96745-1 <br /> Laboratory: Eurofins TestAmerica, Pleasanton <br /> Narrative , <br /> Job Narrative <br /> 720-96745-1 <br /> Comments <br /> No additional comments. <br /> Receipt <br /> The sample was received on 12/30/2019 1:45 PM;the sample arrived in good condition, properly preserved and,where required,on ice. <br /> The temperature of the cooler at receipt was 3.4°C. <br /> GC/MS VOA <br /> Method 8260B:The matrix spike/matrix spike duplicate(MS/MSD)recoveries for preparation batch 720-277971 and analytical batch <br /> 720-277956 were outside control limits. Sample matrix interference and/or non-homogeneity are suspected because the associated <br /> laboratory control sample(LCS)recovery was within acceptance limits. <br /> No additional analytical or quality issues were noted,other than those described above or in the Definitions/Glossary page. <br /> GC/MS Semi VOA <br /> Method 8270C:The laboratory control sample(LCS)for preparation batch 720-277973 and analytical batch 720-277999 recovered outside <br /> control limits for the following analyte(s):2,4-Dinitrophenol . 2,4-Dinitrophenol has been identified as a poor performing analyte when <br /> analyzed using this method;therefore, re-extraction/re-analysis was not performed. <br /> Method 8270C:The matrix spike/matrix spike duplicate(MS/MSD)recoveries and precision for preparation batch 720-277973 and <br /> analytical batch 720-277999 were outside control limits. Sample matrix interference and/or non-homogeneity are suspected because the <br /> associated laboratory control sample(LCS)was within acceptance limits. <br /> Method 8270C:The following sample was diluted due to the abundance of non-target analytes: R-1036-SOIL-DISPOSAL-1230 <br /> (720-96745-1). Elevated reporting limits(RLs)are provided. <br /> No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. <br /> GC Semi VOA <br /> Method 8082:The following samples required a tetrabutylammonium sulfite(TBA)clean-up to reduce matrix interferences caused by <br /> sulfur: R-1036-SOIL-DISPOSAL-1230(720-96745-1), (LCS 720-277968/2-A)and(MB 720-277968/1-A). <br /> No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. <br /> Organic Prep <br /> No analytical or quality issues were noted,other than those described in the Definitions/Glossary page. <br /> Eurofins TestAmerica, Pleasanton <br /> Page 4 of 49 1/8/2020 <br />