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APPENDIX C CHEMICAL ANALYTICAL DATA REPORTS Analytical Methods Chain-of-custody procedures were followed during the transport of the groundwater samples to the analytical testing laboratory. The analytical results, analytical methods reference and laboratory quality control records are included in this appendix.The analytical results are summarized in the text and tables of this report. Analytical Data Review The laboratory maintains an internal quality assurance program as documented in its laboratory quality assurance manual. The laboratory uses a combination of method blanks, laboratory duplicates, and laboratory control samples to evaluate the validity of the analytical results. The laboratory also uses data quality goals for individual chemicals or groups of chemicals based on the long-term performance of the test methods.The data quality goals were included in the laboratory report.The laboratory compared each group of samples with the existing data quality goals. Analytical Data Review Summary No data quality exceptions were noted in the laboratory reports during our review of the compliance groundwater monitoring data. Based on our data quality review, it is our opinion that the analytical data are of acceptable quality for their intended use in this report. GEOENGINEER� January 24,2022 1 Page C-1 File No.0661-108-03