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Case Narrative Client: WSB & Associates, Inc Job ID: 200-63117-1 Project/Site: Kenzie Terrace SDG: 200-63117 Job ID: 200-63117-1 Laboratory: Eurofins Burlington Narrative CASE NARRATIVE Client: WSB & Associates, Inc Project: Kenzie Terrace Report Number: 200-63117-1 With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In some cases, due to interference or analytes present at high concentrations, samples were diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. Calculations are performed before rounding to avoid round-off errors in calculated results. All holding times were met and proper preservation noted for the methods performed on these samples, unless otherwise detailed in the individual sections below. RECEIPT The samples were received on 04/23/2022; the samples arrived in good condition. VOLATILE ORGANIC COMPOUNDS Samples V-1, V-2, V-3 and V-4 were analyzed for Volatile Organic Compounds in accordance with EPA Method TO-15. The samples were analyzed on 04/26/2022. Samples V-1[10X], V-2[10X], V-3[10X] and V-4[10X] required dilution prior to analysis. The reporting limits have been adjusted accordingly. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Eurofins Burlington Page 4 of 44 4/29/2022 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16