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Case Narrative C <br /> Client: Geosyntec Consultants, Inc. TestAmerica Job ID: 320-47216-1 <br /> Project/Site: WR2501 Port of Stockton <br /> Job ID: 320-47216-1 (Continued) <br /> Laboratory: TestAmerica Sacramento (Continued) <br /> GC Semi VOA , <br /> Method(s)80158:The method blank for preparation batch 320-273693 and 320-273709 and analytical batch 320-273969 contained <br /> Diesel Range Organics[C10-C28]above the method detection limit. This target analyte concentration was less than the reporting limit <br /> (RL);therefore, re-extraction and/or re-analysis of samples was not performed. <br /> Method(s)801513:The matrix spike duplicate(MSD)recovery for preparation batch 320-273693 and analytical batch 320-273969 was <br /> outside control limits. Sample matrix interference and/or non-homogeneity are suspected because the associated laboratory control <br /> sample(LCS)recovery was within acceptance limits. <br /> Method(s)801513: Surrogate recovery for the following sample was outside control limits: PS-UST-SS-817B-02A-4(320-47216-4). <br /> Re-extraction was performed with concurring results. The original analysis has been reported. <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)6020: The matrix spike/matrix spike duplicate(MS/MSD)recoveries and precision for preparation batch 320-274344 and <br /> analytical batch 320-274782 were outside control limits. Sample matrix interference and/or non-homogeneity are suspected because the <br /> associated 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 /> Organic Prep <br /> Method(s)3510C:The following samples formed emulsion during the extraction procedure: PS-UST-SS-9168-02A-W(320-47216-9), <br /> PS-UST-SS-9168-02A-W(320-47216-9[MS]), PS-UST-SS-9168-02A-W(320-47216-9[MSD])and DUP(320-47216-10). The emulsions <br /> were broken up using sodium sulfate.These samples are associated with method 8015B_DRO aqueous in preparation batch <br /> 320-273693. <br /> No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. <br /> TestAmerica Sacramento <br /> Page 5 of 57 2/15/2019 <br />