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1534 Willow Pass Road,Pittsburg,CA 94565-1701 <br /> M c C a m p b e I l Analytical, Inc. Toll Free Telephone:(877)252-9262/Fax:(925)252-9269 <br /> "When Quality Counts" http://www.mccanVbell.com/E-mail:main@mccampbell.com <br /> Case Narrative <br /> Client: Condor Earth Technologies,Inc. Work Order: 2405941 <br /> Project: 9116 B.02;ASG-1&2,Sub-1&2 May 20,2024 <br /> TO-15 ANALYSIS <br /> Qualitative Leak Check compound narrative for TO15 analysis: <br /> 1,1-Difluoroethane is not a formal method analyte,and does not have a calibration curve relating response to concentration. <br /> Therefore,an estimated concentration must be based on a calibrated compound response. Typically,the chosen proxy <br /> compound has similar chemical properties and similar retention times.For Work Order 2405941,the value for 1,1- <br /> Difluoroethane is estimated value based on the dichlorodifluoromethane calibration.Although they do not share identical <br /> chemical properties,dichlorodifluoromethane has been chosen because it is the lightest fluorinated compound on the list of <br /> calibrated analytes,and has the same chromatographic retention time as 1,1-Difluoroethane. <br /> All summa canisters are EVACUATED 5 days after the reporting of the results. Please call or email if a longer retention <br /> time is required. <br /> Page 4 of 29 <br />