The Margin - The Margin
Dieldrin measured at 1.7 µg/L in Well Y-15, roughly eight and a half times the standard Guam would eventually adopt.
No sampling at Y-15. Thirteen years with the well absent from the monitoring record.
Y-15 peaks at 1.9 µg/L, the highest reading ever recorded there.
EPA threatens federal enforcement against GWA over dieldrin.
Contractor writes a brief notification letter, addressed to Guam EPA, that contaminated soil will be encapsulated.
GWA sends some Yigo residents a letter advising them not to drink the tap water without treatment due to the presence of dieldrin in the groundwater.
Guam EPA receives the 2024 soil management plans, thirteen months after they were written and only after asking military contractors.
Guam EPA and U.S. EPA formally asked Joint Region Marianas to investigate potential sources of dieldrin contamination on the base.
Guam EPA senior science advisor tells U.S. EPA “there’s rumors that maybe JRM isn’t sharing all of the data that they already have.”