IU 2&6 Segment 1 | ARRA

An area designated as the IU 2 & 6 Segment 1 encompasses about 23 square miles of the northeastern portion of the Hanford Site, away from the nine surplus plutonium production reactor areas. Six waste sites located in IU 2 & 6 segment 1 were discovered during a 2008 orphan site evaluation and required remediation. The sites were relatively small and contained mostly surface debris that were removed and transported to an approved disposal facility.

Remediation was completed at three of the six waste sites – 600-343, 600-345, and 600-346.
Some remediation work also was completed at site 600-341, which consists of four areas. Remediation of site 344 will proceed after a historical and cultural review. Last month, a global positioning environmental radiological survey indicated that site 600342 did not require additional remediation.

Site 600-343 consisted of residual ash from burned material and dumped asphalt in an excavated trench, site 600-345 was a stained area with oil filters, site 600-346 consisted of four small fly ash dump areas with metal debris, and site 600-341 consists of four areas that contain dry cell battery remnants and/or battery debris.