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Case Narrative C Client: Union Pacific RR Operations eProcurement Job ID: 440-248216-1 Project/Site: UPRR-Sludge Bin Stockton- New Profile Job ID: 440-248216-1 Laboratory: Eurofins TestAmerica, Irvine Narrative Job Narrative 440-248216-1 Comments No additional comments. Receipt The sample was received on 8/16/2019 2:09 PM; the sample arrived in good condition, properly preserved and,where required, on ice. The temperature of the cooler at receipt was 2.6°C. GC/MS VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. GC/MS Semi VOA Method(s)8270C:The laboratory control sample and/or the laboratory control sample duplicate(LCS/LCSD)for preparation batch 440-564322 and analytical batch 440-564438 recovered outside control limits for the following analyte(s):4-Chloroaniline. This analyte has been identified as a poor performing analyte when analyzed using this method;therefore, re-extraction/re-analysis was not performed. The affected samples are reported with possible low bias for the failing analyte. Method(s)8270C:The laboratory control sample(LCS)for preparation batch 440-564322 and analytical batch 440-564438 recovered outside control limits for the following analytes: Benzo[a]pyrene. These analytes were biased high in the LCS and were not detected in the associated samples;therefore,the data have been reported. 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. Metals Method(s)601013:The matrix spike/matrix spike duplicate(MS/MSD)recoveries of Antimony for preparation batch 440-565089 and analytical batch 440-565295 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. Organic Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. VOA Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. Subcontract Work Method Fish Bioassay: This method was subcontracted to Aquatic Testing Laboratories. The subcontract laboratory certification is different from that of the facility issuing the final report. Eurofins TestAmerica Irvine Page 4 of 32 8/36/2019