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Guam EPA says US EPA/ATSDR involvement expanding as soil and groundwater contamination investigation continues
Summary
Agency staff told the board that US EPA Region Marianas and ATSDR are coordinating on a scoping assessment and requested additional historical exposure data; an expert told the board consistent concentrations across years suggest a possible point source and further sampling is needed.
The Guam Environmental Protection Agency told its board on Feb. 19 that federal partners are increasingly involved in an environmental investigation after staff provided data indicating persistent concentrations of a pesticide‑class contaminant in soil and groundwater.
Agency staff said US EPA Region Marianas will conduct an initial scoping assessment (not a final sampling plan) and that some sampling may take place on federal property outside Andersen’s back gate near a site referred to as Y‑15. The agency also said the Agency for Toxic Substances and Disease Registry (ATSDR) requested additional historical…
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