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 Presentation

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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) 644-2160amber.finkelstein@epa.state.oh.us

Questions about remedial alternatives:John Rochotte (740) 380-5262john.rochotte@epa.state.oh.us

Questions about permit/permit modifications:

Donna Goodman (740) 380-5293donna.goodman@epa.state.oh.us

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: dmwmcomments@epa.state.oh.us

Public Information and Comments

Cytec Site

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