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Case Narrative Client: Patriot Environmental Services Job ID: 720-93886-1 Project/Site: UPRR-French Camp Job ID: 720-93886-1 -- - - -- Laboratory: Eurofins TestAmerica, Pleasanton Narrative Job Narrative 720-93886-1 Comments No additional comments. Receipt The samples were received on 7/6/2019 11:20 AM;the samples arrived in good condition, properly preserved and,where required, on ice. The temperature of the cooler at receipt was 4.6°C. Receipt Exceptions The Chain-of-Custody(COC)was incomplete as received and/or improperly completed:sample date and time not written on the COC. Information acquired from tops of jars. GC/MS VOA Method(s)8260B:The continuing calibration verification(CCV)associated with batch 440-556795 recovered above the upper control limit for 2,2-Dichloropropane. The samples associated with this CCV were non-detects for the affected analytes;therefore,the data have been reported. The following samples are impacted: 001 (720-93886-1), 002(720-93886-2)and(CCVIS 440-556795/2). Method(s)8260B: Surrogate 4-Bromofluorobenzene recovery for the following sample was outside control limits:002(720-93886-2). Evidence of matrix interference is present;therefore, re-extraction and/or re-analysis was not performed. No additional analytical or quality issues were noted,other than those described above or in the Definitions/Glossary page. GC/MS Semi VOA Method(s)8270C:The following samples required a dilution due to the nature of the sample matrix: 001 (720-93886-1)and 002 (720-93886-2). 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. Method(s)8270C:The following samples were diluted due to the nature of the sample matrix: High hydrocarbons 001 (720-93886-1)and 002(720-93886-2). Elevated reporting limits(RLs)are provided. Method(s)8270C:The source sample was diluted due to the nature of the sample matrix: (LCS 440-556805/2-A). Because of this dilution, the surrogate spike and matrix 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. GC VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. GC Semi VOA Method(s)801513:The following 8015-DRO samples required a dilution due to the nature of the sample matrix: 001 (720-93886-1)and 002(720-93886-2). 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 and precision of Barium and Zinc for preparation batch 440-557085 and analytical batch 440-557455 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. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Eurofins TestAmerica, Pleasanton Page 4 of 37 7/15/2019