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Client: Dysert Environmental, inc Case Narrative Project/Site: Zega Building TestAmerica Job ID: 720-86460-1 Job ID: 720-86460-1 — - Laboratory: TestAmerica Pleasanton — — Narrative Job Narrative 720-86460-1 Comments No additional comments. Receipt The samples were received on 5/14/2018 7:19 PM; the samples arrived in good condition, properly preserved and,where required, on ice. The temperatures of the 2 coolers at receipt time were 1.3°C and 1.4°C. Receipt Exceptions The Chain-of-Custody(COC)was incomplete as received. TAT is not listed on the COC, logged as 5 day TAT. GCJMS VOA Method(s)82606:The RPD of the laboratory control sample(LCS)and laboratory control sample duplicate(LCSD)for batch analytical batch 720-244523 recovered outside control limits for the following analytes: Chloroethane and Bromornethane. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. GC/MS Semi VOA No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. GC Semi VOA Method(s)8081A: The following analyte(s) recovered outside control limits for the LCS associated with preparation batch 720-244426 and analytical batch 720-244521:Aldrin .This is not indicative of a systematic control problem because these were random marginal exceedances. Qualified results have been reported. Method(s)8081A: The%RPD between the primary and confirmation column exceeded 40%for cis-Chlordane for the following sample: S34(720-86460-7). The lower value(s)has been reported and qualified in accordance with the laboratory's SOP. Method(s)8081A:The%RPD between the primary and confirmation column exceeded 40%for cis-Chlordane&trans-Chlordane for the following samples: S4-1'(720-8646C-1 1). The lower value(s)has been reported and qualified in accordance with the laboratory's SOP. Method(s)8081A:The%RPD between the primary and confirmation column exceeded 40%for 4,4'-DDD for the following sample: S24 (720-86460-4). The lower value(s) has been reported and qualified in accordance with the laboratory's SOP. Method(s)8082:The following samples required a tetrabutylammonium suffite(TBA)clean-up to reduce matrix interferences caused by sulfur: Sl-l'(720-86460-1), S2-3' (720-86460-6), S3-6'(720-86460-10), S4-9'(720-86460-14), (LCS 720-24442712-A), (MB 720-24442711-A), (720-86460-A-1-N MS)and (720-86460-A-1-1 MSD). No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Metals Method(s)601OB:The post digestion spike%recovery for Ba associated with batch 720-244457 was outside of control limits. Method(s)60108:The following samples were diluted due to the abundance of non-target analyte:S1-1'(720-86460-1), S2-3' (720-86460-6)and S3-6'(720-86460-10). Elevated reporting limits(RLs)are provided. Method(s)60108:The following sample was diluted due to the abundance of non-target analytes: S4-9'(720-86460-14). Elevated reporting limits(RLs)are provided. Page 4 of 75 TestAmerica Pleasanton 5/21/2018