The site is located in the Omaha metropolitan area and encompasses Council Bluffs and Carter Lake, Iowa, and east Omaha, Nebraska. All of the site activities are centered around downtown Omaha, Nebraska.
ASARCO Incorporated (ASARCO) operated a lead refinery at 500 Douglas Street in Omaha, Nebraska, for over 100 years beginning in the 1870s. The operation of the refinery ceased in 1997. As a routine part of the refinery operation, lead particles were emitted into the atmosphere at the refinery. In addition, the Gould Incorporated Lead Battery Recycling Plant located at 555 Farnam Street in Omaha was a secondary smelter of lead from discarded lead batteries. The blast furnace used to smelt the lead at the Gould plant emitted lead particles into the air from that refinery. The Gould plant closed in 1982.
Several other facilities in the Omaha area used lead in their manufacturing processes. A few of these included Carter White Lead at 21st and Locust Street which produced white lead paint bases, red lead and litharge protective coatings until 1936, Omaha Shot and Lead which later became Lawrence Shot and Lead and then became National Lead Company which manufactured lead shot by melting pig lead, Grant Storage Battery Company, Storage Battery Factory, and Exide Corporation which manufactured lead storage batteries.
Numerous other locations in the Omaha area such as foundries, iron works, metal salvaging companies and other manufacturers also used or processed lead at their facilities.
On March 25, 2004, an Action Memorandum Amendment was signed. This amendment changed the scope of work to include daycare facilities and elevated blood levels (EBLs) that were previously addressed under the first Action Memorandum, however, still addresses highly contaminated properties with lead-soil concentrations of 1,200 milligrams per kilogram (mg/kg) or greater.
Continued activities are being centralized from the Missouri River Treatment Plant located at 5600 S. 10th Street, Omaha, Nebraska, 68107-3501. The city of Omaha has partnered with the U.S. Environmental Protection Agency (EPA) to allow the use of a portion of the facility.
During this reporting period, there were 8 properties excavated, 7 backfilled, and 9 sodded.
As a project summary, during Phase I of the removal action, there were 32 properties completed. During Phase II there were 112 properties completed. Finally, Phase III has resulted in a total of 299 properties excavated, 295 backfilled, and 284 sodded.
Some delays pertaining to the application of the sod on some properties have been experienced, primarily due to weather delays. This has occurred semi-frequently throughout all three phases of the removal action. Continued communication with the sod sub-contractor is on-going to emphasize timing and coordination of the work tasks.
A test plot was constructed at the Missouri River Treatment Plant to evaluate the viability of hydro-seeding. The test plot hydroseeding final report is being reviews by EPA.
It should be noted that as an additional safeguard, the EPA sampled the sod that is currently being applied to all properties that have had a removal action performed. This sampling effort included analysis for total lead, herbicides, pesticides, semi-volatiles and volatile organic compounds. The resulting levels were below any levels of concern.
There has been a sufficient list of assigned properties to take the work into December 2004, completing Phase III.
Continued prioritization will be given to EBLs, day care facilities, and highly contaminated properties where children six years of age or younger live. All of the higher priority properties received thus far, have been completed, therefore, geographic grouping of properties has been implemented to utilize resources and to create continuity in the community.
There are currently 18 EPA Emergency and Rapid Response Service (ERRS) contractor employees and 2 MINI-START contractor personnel working extended work hours, 6 days a week. The breakdown of personnel is comprised of one excavation crew and two backfill crews. There is also a "punch list crew" that follows behind the other work teams to re-install fences and other needed repairs. Then, a local sod subcontractor lays/installs new sod on the properties. A few of the final steps include having the sod watered by the ERRS for a two week period. At that point, the property owner is provided with an instruction sheet (bilingual) that explains future care steps concerning the sod and is encouraged to take over the responsibilities of care. After that, a final letter is sent to the property owner stating that the clean-up has been completed and a sketch of the property depicting the EPA assessment/actions is also provided to the property owner.
The greater Omaha area has received a significant amount of rainfall this year. This has resulted in minor delays concerning the sod sub-contractor, accessing backfill source areas and some erosion that has occurred involving residential yards.
On November 29, 2004, ERRs Delivery Order 006 was amended (increased) by $443,190. On December 2, 2004, the same delivery order was increased again by $2,910.
|
