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Washington County Landfill <br />. <br /> <br />01 <br />Lake Elmo’s concern for both City water supplies and private wells <br />Due to the plume being made up of a different molecular mix from the <br />Oakdale Landfill and another mix from the Washington County Landfill, we <br />have a comingled plume. Private wells tests HERE shows different molecule <br />if you look at each well. <br />02 PFOS is the primary PFAS constituent in the Oakdale site, whereas the <br />Washington County Landfill has PFBA/PFOA signature. The main point, is both <br />landfills have a mix of different PFAS which when we test downstream in the <br />aquifer it is hard to tell what came from where.