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Case Narrative <br />Client: Stantec Consulting Corp. Job ID: 320-67359-1 <br />Project/Site: 7-11 No 20632 (CA) <br />Job ID: 320-67359-1 <br />Laboratory: Eurofins TestAmerica, Sacramento <br />Narrative <br />Job Narrative <br />320-67359-1 <br />Comments <br />No additional comments. <br />Receipt <br />The samples were received on 12/1/2020 2:04 PM;the samples arrived in good condition,and where required, properly preserved and on <br />ice.The temperature of the cooler at receipt was 3.0°C. <br />GC/MS VOA <br />Method 82606/CA_LUFTMS:The ending CCV for batch 437997(CCV 320-437997/22)was outside acceptance limits with a low bias.Two <br />consecutive CCVs(CCV 320-437997/23, CCV 320-437997/24)were analyzed the next morning, outside the 12 hour tune window to <br />demonstrate that the instrument was still in calibration. <br />No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. <br />GC Semi VOA <br />Method 80156:The following samples were diluted due to the nature of the sample matrix: D-1-4(320-67359-1),TP-2-14.5 <br />320-67359-4),TP-3-15.5(320-67359-5), (320-67359-B-1-AMS)and (320-67359-B-1-B MSD). Elevated reporting limits(RLs)are <br />provided. <br />No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. <br />Metals <br />Method 6010B:The matrix spike/matrix spike duplicate(MS/MSD)recoveries for preparation batch 320-439292 and analytical batch <br />320-439665 were outside control limits. Sample matrix interference and/or non-homogeneity are suspected because the associated <br />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 />VOA Prep <br />No analytical or quality issues were noted,other than those described in the Definitions/Glossary page. <br />Lab Admin <br />No analytical or quality issues were noted,other than those described in the Definitions/Glossary page. <br />Eurofins TestAmerica, Sacramento <br />Page 4 of 40 12/10/2020