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Case Narrative Client: Calgon Carbon Corporation TestAmerica Job ID: 180-88154-1 Project/Site: Calgon Stockton Water Job ID: 180-88154-1 Laboratory: TestAmerica Pittsburgh Narrative Job Narrative 180-88154-1 Receipt The sample was received on 3/27/2019 10:10 AM; the sample arrived in good condition, properly preserved and, where required, on ice. The temperature of the cooler at receipt was 1.7° C. GC/MS VOA Method(s) 8260B: The laboratory control sample (LCS) for analytical batch 720-262822 recovered above the control limits for the following analyte: vinyl acetate. As this analyte was biased high in the LCS and was not detected in the associated sample; the results were reported. 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 sample was diluted due to the abundance of non-target analytes: WASTE WATER (180-88154-1). Elevated reporting limits (RLs) are provided. Method(s) 8270C: The recovery of surrogates 2-fluorophenol and phenol-d5 was below the control limits for the following sample: WASTE WATER (180-88154-1). Evidence of matrix interference is present; therefore, re-extraction and/or re-analysis was not performed. Method(s) 8270C: The RPD between the laboratory control sample (LCS) and laboratory control sample duplicate (LCSD) for preparation batch 720-262975 was above the control limits for pyridine. The recoveries were within the control limits. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Metals Method(s) 6010B: Due to sample matrix effect on the internal standard (ISTD), a dilution was required for the following sample WASTE WATER (180-88154-1). No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. TestAmerica Pittsburgh 4/3/2019 Page 3 of 30