Posted on: 04/12/2013 05:26 PM

The New York State Department of Environmental Conservation has issues a press release on the start of dredging.

Additional odor control measures will be in place when dredging and capping of
contaminated sediments in Onondaga Lake resume for the season, likely on April 10, the New
York State Department of Environmental Conservation (DEC) announced today. The current
plan is to start on Wednesday for 12 hours for dredging only, which will increase to normal
operations 24 hours a day, six days a week starting Thursday, weather permitting. Capping
activities are expected to start in the coming weeks.

DEC met with Town of Camillus officials to discuss the startup and additional odor
control measures after DEC and Honeywell evaluated the feasibility and effectiveness of such
measures for implementation in 2013. These additional measures include installing:

• a 35-foot tall windscreen along the northern edge of the Sediment Consolidation Area
(SCA) and the north side of the East Basin spanning approximately 1,900 linear feet to
reduce wind speeds and enhance the effectiveness of the misting system. This measure
will be in place before dredging commences;

• a vegetative barrier in areas north of the SCA to further reduce potential offsite migration
of odors. Work is underway and plantings are anticipated to be completed by mid-April.
The full benefit of this measure will not be realized until the trees branch out and fill in
over the growing season;

• geotextile tube covers to reduce emissions related to dewatering. Modified geotextile
tubes are already on site and ready for use;

• improvement and expansion of the odor control misting system to intercept potential

• containment during transportation and stockpiling of oversized material to reduce
potential odors; and

• a floating cover over the entire East Basin.
Honeywell implemented other odor reduction measures in 2012 (see October 2012 fact
sheet http://www.dec.ny.gov/chemical/85898.html).

Health and Safety Plan and data is continuously reviewed by DEC, the New York State
Department of Health (DOH) and the U.S. Environmental Protection Agency (EPA). The data
collected to date does not indicate a community health concern; all levels are lower than
concentrations established for the protection of public health. Data from the onsite air monitoring stations is available at http://www.lakecleanup.com/health-and-safety/air-monitoring .

By the end of 2013, dredging will be about halfway complete. Dredging is anticipated to
be finished in 2015 and capping in 2016. Habitat restoration activities will be performed in all remediated areas and habitat reconstruction work is anticipated to be completed in 2016.

The $451 million Superfund remediation project has undergone five years of design and
engineering; about 400 million gallons of water were treated and 230,000 cubic yards of lake
material were removed in 2012 before operations were inactivated for the winter. Honeywell
International is conducting the project with oversight by DEC, DOH and EPA.
More information about the Onondaga Lake dredging project is available on DEC’s
website at www.dec.ny.gov/chemical/37558.html including Frequently Asked Questions, June
2012 (http://www.dec.ny.gov/docs/regions_pdf/faqol612.pdf).

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