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Case Narrative <br /> Client: Geosyntec Consultants, Inc. Job ID: 320-51445-1 <br /> Project/Site: WR2501 Rough and Ready Island-Stockton <br /> Job ID: 320-51445-1 <br /> Laboratory: Eurofins TestAmerica, Sacramento <br /> Narrative L <br /> Job Narrative <br /> 320-51445-1 <br /> Comments <br /> No additional comments. <br /> Receipt <br /> The samples were received on 6/18/2019 5:10 PM;the samples arrived in good condition. <br /> The client confirmed D1946 for Helium only via email on June 19, 2019. C <br /> The client canceled D1946 analysis for sample TB-01 via email on June 19, 2019. <br /> Air-GC VOA <br /> No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. <br /> Air-GC/MS VOA <br /> Method(s)TO-15:The following samples were diluted due to the abundance of non-target analytes: SVP-1 (320-51445-1), SVP-2 <br /> (320-51445-2), SVP-3(320-51445-3),and DUP-01 (320-51445-4). Elevated reporting limits(RLs)are provided. <br /> Method(s)TO-15: 1,2-Dichloroethane-d4(Surrogate)recovery for the following sample was outside control limits:TB-01 (320-51445-5). <br /> Evidence of matrix interference is present;therefore, re-extraction and/or re-analysis was not performed. <br /> Method(s)TO-15:The laboratory control sample(LCS)and laboratory control sample duplicate(LCSD)for 304928 recovered outside <br /> control limits for the following analyte:Toluene. This analyte was biased high in the LCS and was not detected in the associated <br /> samples;therefore,the data have been reported. <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 /> Eurofins TestAmerica, Sacramento <br /> Page 4 of 77 7/2/2019 <br />