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Case Narrative <br /> Client: GHD Services Inc. TestAmerica Job ID: 720-91968-1 <br /> Project/Site: UPRR-Tracy Substation <br /> Job ID: 720-91968-1 <br /> Laboratory: TestAmerica Pleasanton <br /> , <br /> Narrative <br /> Job Narrative <br /> 720-91968-1 <br /> Comments <br /> No additional comments. <br /> Receipt <br /> The sample was received on 3/16/2019 9:20 AM; the sample arrived in good condition, properly preserved and,where required, on ice. <br /> The temperature of the cooler at receipt was 2.0°C. <br /> GC/MS VOA <br /> Method(s)8260B:The matrix spike/matrix spike duplicate(MS/MSD)recoveries and precision for preparation batch 720-262251 and <br /> analytical batch 720-262202 were outside control limits. Sample matrix interference and/or non-homogeneity are suspected because the <br /> associated laboratory control sample/laboratory sample control duplicate(LCS/LCSD)precision 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 Semi VOA <br /> Method(s)8015B:The following samples required a dilution due to the nature of the sample matrix: (720-91934-A-5-H MS)and <br /> (720-91934-A-5-1 MSD). Because of this dilution,the surrogate spike concentration in the sample was reduced to a level where the <br /> recovery calculation does not provide useful information.The MS/MSD were performed on a sample from another job. <br /> No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. <br /> Metals <br /> Method(s)6010B:The matrix spike/matrix spike duplicate(MS/MSD)recoveries and precision for preparation batch 720-262072 and <br /> analytical batch 720-262236 were outside control limits. Sample matrix interference and/or non-homogeneity are suspected because the <br /> associated laboratory control sample (LCS)recoveries was within acceptance limits. <br /> Method(s)6010B:The post digestion spike% recovery for Barium-136%, Chromium-129%&Vanadium-131%associated with batch <br /> 720-262236 was outside of control limits. The following sample is impacted: (720-91932-A-1-DPDS). <br /> Method(s)6010B:The serial dilution performed for the following sample associated with batch 720-262236 was outside control limits for <br /> Cobalt-17%,Chromium-13%, Nickel-14%&Vanadium-11%: (720-91932-A-1-DSD) <br /> Method(s)6010B:The following sample was diluted due to the abundance of non-target analytes:WR#19721 (720-91968-1). Elevated <br /> 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 /> Organic Prep <br /> No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. <br /> TestAmerica Pleasanton <br /> Page 4 of 30 3/20/2019 <br />