cytec statement of basis and permit modification
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Cytec Statement of Basis and Permit Modification. July 16, 2012 Public Hearing Ohio Environmental Protection Agency. Cytec Public Hearing. - PowerPoint PPT PresentationTRANSCRIPT
Cytec Statement of Basis and Permit Modification
July 16, 2012 Public Hearing
Ohio Environmental Protection Agency
The purpose of tonight’s hearing is to receive comments from the public on Ohio EPA’s preferred remedy (called “the Statement of Basis”), for SWMU 1 (North Landfill), and draft permit modification.
Cytec Public Hearing
Ohio EPA issues draft Statement of Basis and permit modification for public comment (6/13/12)
45 day public comment period (6/13/12-7/28/12) Public hearing (7/16/12) After comments are received and reviewed, Ohio
EPA will respond to all relevant comments in writing
After considering comments, Ohio EPA issues final decision
Permit Modification Process
American Cyanamid 1976
SWMU 1, North Landfill
North Landfill Today
CCytec Site
54 acre site located on Greene Street in Marietta Industrial activity since 1915 Manufactured dyes, DDT, UV absorbers, rubber
additives, specialty chemicals Wastes disposed of in on-site landfills, ponds and
other waste areas Ponds 1 and 2 used for wastewater equalization &
settling North Landfill closed in 1979; clean soil (clay)
added, leachate collection system installed Chemical manufacturing ceased in 1996 In 2002, production buildings were demolished
History of Cytec
Soil sampling - 19 soil borings installed Three ground water monitoring wells Three monitoring wells (piezometers)
installed within the landfill boundary to measure ground water levels
Geotechnical Analysis completed from soil boring information
Ground water Pump Tests
North Landfill Recent Site Investigation (2011)
Soil near the landfill consists primarily of clay and silt
Waste material is 20-30 feet thick Primary ground water flow is in the
weathered bedrock zone Ground water flows into Duck Creek
North Landfill Site Investigation Findings
A study to evaluate different cleanup options. The study resulted in a CMS Report which was reviewed and approved by Ohio EPA.
Cytec recommended cleanup measures for the site. For the North Landfill, alternatives divided into (1) soil/waste and (2) ground water.
Corrective Measures Study
Soil cleanup options evaluated for SWMU 1 :
No Action - $50,000 Cap augmentation with soil (clay) - $280,000 Cap augmentation with synthetic liner-
$260,000 Cap augmentation with clay, synthetic liner,
drainage layer - $740,000 Excavation with off-site disposal - $29,740,000
(assumes 50% hazardous waste) Excavation with off-site disposal - $13,458,785
(assumes 100% solid waste)
Corrective Measures Study
Ground water cleanup options evaluatedspecific to the North Landfill: Hydraulic control (pump and treat) - $200,000 Containment (ground water barrier)
Sheet pile wall - $1,960,000 Sheet pile wall w/hydraulic control -
$2,030,000 Slurry wall (Bentonite clay) - $800, 000 Slurry wall w/hydraulic control - $850,000
Corrective Measures Study
Soil & plastic liner cap augmentation with leachate collection
Slurry wall installation along the western and southern boundaries of the landfill
Ohio EPA Proposed Alternative for the North
Landfill
Installation of a clay berm (or equivalent berm/barrier) in the northeast portion of the landfill
Institutional controls (environmental covenant)
Ohio EPA Proposed Alternative for the North
Landfill
Proposed Slurry Wall Location in Red
Slurry Wall Installation
SWMU 26, East Storage Pad – Excavation with off-site disposal
“OSC-A” (Tank Saddle Area) – Extend the cap from SWMU 10
Drainage Swale – No further action Duck Creek – Periodic monitoring to
ensure that remedies are effective
Additional Actions
East Storage Pad
OSC-A Tank Saddle Area
Drainage Swale and Duck Creek
Site-wide ground water contamination will be addressed by ground water pumping wells, placed along the east side of the property, to prevent migration of ground water off-site; monitoring plan to be submitted to Ohio EPA
Areas with waste remaining will be addressed with an Environmental Covenant – a legally enforceable document that will impose use and activity limitations on the property or a portion of the property (for example, prohibiting the use of on-site ground water and prohibiting on-site soil excavation)
Remedial Alternatives Proposed to be Applied Site-
wide
Public comments accepted through July 28, 2012
Ohio EPA written response to comments Ohio EPA selects final remedies, written final
action Corrective measures workplan submitted by
Cytec within 90 days of Ohio EPA’s written final action
Ohio EPA review, subsequent approval Cytec implements remedies Operation, maintenance, financial assurance
Next Steps in Clean Up Process
Questions about public involvement:Amber Finkelstein (614) [email protected]
Questions about remedial alternatives:John Rochotte (740) [email protected]
Questions about permit/permit modifications:
Donna Goodman (740) [email protected]
Ohio EPA Contacts
Link to Draft Statement of Basis: http://www.epa.ohio.gov/dmwm (bottom right corner under “stakeholder input”, click on “read more”)
Verbal and written comments accepted tonight Additional written comments by July 28, 2012 to: Ohio EPA , Division of Materials and Waste Management
Attn: Engineering, Remediation and Authorizations SectionP.O. Box 1049 Columbus, OH 43216-1049
phone (614) 644-2621 fax (614) 728-5315
e-mail: [email protected]
Public Information and Comments
Cytec Site