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Case Narrative Client: GHD Services Inc. TestAmerica Job ID: 720-90502-2 Project/Site: UPRR- French Camp Job ID: 720-90502-1 Laboratory: TestAmerica Pleasanton Narrative Job Narrative 720-90502-1 Comments No additional comments. Receipt The samples were received on 12/21/2018 1:45 PM;the samples arrived in good condition, properly preserved and,where required, on ice. The temperature of the cooler at receipt was 5.5°C. GC/MS VOA Method(s)8260B:The following sample was diluted due to matrix.: HYD.WASTE(720-90502-5). Elevated reporting limits(RL)are provided. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. GC Semi VOA Method(s)801513:The following sample required a dilution due to the nature of the sample matrix: HYD.WASTE(720-90502-5). Because of this dilution,the surrogate spike concentration in the sample was reduced to a level where the recovery calculation does not provide useful information. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Metals Method(s)6010B:The matrix spike/matrix spike duplicate(MS/MSD)recoveries for in preparation batch 720-257627 and analytical batch 720-257691 were outside control limits. Sample matrix interference and/or non-homogeneity are suspected because the associated laboratory control sample(LCS)recovery was within acceptance limits. Method(s)6010B:The serial dilution performed for the following sample associated with batch 720-257691 was outside control limits Ba-26%, Co-40%, Cr-29%, Ni-31%,V-23%: (720-90512-A-1-ESD 120) No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Organic Prep Method(s)3546: 8015B DRO 3546. Due to the matrix, the following sample could not be concentrated to the final method required volume of 2 mL: HYD.WASTE(720-90502-5). The reporting limits(RLs)are elevated proportionately.The sample final volume was 5 mL. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Job ID: 720-90502-2 -- - -- Laboratory: TestAmerica Pleasanton Narrative Job Narrative 720-90502-2 Comments No additional comments. Receipt The samples were received on 12/21/2018 1:45 PM; the samples arrived in good condition, properly preserved and,where required, on ice. The temperature of the cooler at receipt was 5.5°C. No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. TestAmerica Pleasanton Page 4 of 43 1/24/2019