# ATSDR *Federal agency whose assessment dates 3M disposal at the Washington County Landfill* The Agency for Toxic Substances and Disease Registry (ATSDR) is a federal agency. It appears in the Minnesota record through a federal ATSDR assessment. According to the project's at-issue record, that assessment dates 3M's disposal at the [[Washington County Landfill]] to 1971–1974.[^1] The landfill is documented in the Minnesota Pollution Control Agency's Closed Landfill Program record, published by the Minnesota Attorney General as exhibit PTX2752. That record states that the site was permitted on May 12, 1969, and operated until May 1, 1975. It holds roughly 2,570,000 cubic yards and "was under public ownership when in operation," with Washington and Ramsey Counties as its operators.[^2] ## Who The at-issue record attributes the federal assessment dating 3M's disposal at the site to ATSDR.[^1] The same record names two other parties at the landfill. Washington and Ramsey Counties operated the site, according to the state agency's record.[^2] 3M disposed of waste there, according to its own ledger and the ATSDR assessment.[^1] ## What The pack carries one finding from the ATSDR assessment: it dates 3M's disposal at the Washington County Landfill to 1971–1974.[^1] The record does not establish the assessment's title, its date, or its scope beyond that finding. The assessment's own text is not among the pack's citable sources.[^1] ## In the at-issue record At-issue pair AI-Washington-002, in the Washington package, rests on three sources: an agency record and two exhibits, drawn from the Minnesota Attorney General's site and from ATSDR.[^1] The pair's primary anchor is the state agency's own record of who owned and operated the site. That record gives the permit date as May 12, 1969, and the end of operation as May 1, 1975. It states that the landfill "was under public ownership when in operation" and that Washington and Ramsey Counties operated it.[^2] The pair sets two further records beside that one. 3M's internal ledger lists the site's owner as "Washington County" and records 3M sending "WWTP sludge and boiler ash" there.[^1] The ATSDR assessment dates that disposal to 1971–1974.[^1] On these dates, the 1971–1974 disposal window falls within the 1969–1975 operating period that the Minnesota Pollution Control Agency record gives for the county-operated site.[^2] ## Notes [^1]: Minnesota Attorney General, *Exhibit PTX2752* (n.d.) — primary anchor of at-issue pair AI-Washington-002. The pair's statements about 3M's internal ledger (owner "Washington County"; "WWTP sludge and boiler ash") and the ATSDR assessment's 1971–1974 dating rest on sources the pack lists by domain but does not provide as citable URLs. https://www.ag.state.mn.us/Office/Cases/3M/docs/PTX/PTX2752.pdf [^2]: Minnesota Pollution Control Agency, Closed Landfill Program record, published by the Minnesota Attorney General as *Exhibit PTX2752* (n.d.) — establishes that the Washington County Landfill was permitted May 12, 1969, operated to May 1, 1975, holds roughly 2,570,000 cubic yards, "was under public ownership when in operation," and was operated by Washington and Ramsey Counties. https://www.ag.state.mn.us/Office/Cases/3M/docs/PTX/PTX2752.pdf