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The following sampling and reporting activities were completed during this reporting period:
1. An emerging contaminants evaluation report was submitted in January 2023.
2. Based on Sigma's evaluation and feedback from the WDNR project manager groundwater sampling was performed to analyze emerging contaminants PFAS and 1,4-Dioxane. Based on the laboratory analysis of four groundwater samples both compounds were detected at or below their respective ESs. The results were reported to WDNR on April 6, 2023, via email.
3. Per WDNR request additional sub-slab vapor and indoor air (passive) sampling was performed at the school building located off-site downgradient of the landfill. The results indicate no vapor intrusion risks within the structure. The results were reported to WDNR on April 3, 2023 via email.
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