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ENB Region 9 Completed Applications 03/14/2012

Niagara County


Occidental Chemical Corp
5005 LBJ Freeway
Dallas, TX 75244


Occidental Durez Division Walck Rd Plant
673 Walck Rd
North Tonawanda, NY 14120 -0535

Application ID:


Permit(s) Applied for:

Article 17 Titles 7 & 8 Industrial SPDES - Surface Discharge

Project is Located:

North Tonawanda, Niagara County

Project Description:

The Department has prepared a draft permit and made a tentative determination to approve a modification to the SPDES wastewater discharge permit for the Occidental Chemical -Durez Division Walck Road Plant. The proposed modification includes removal of mercury monitoring requirements because monitoring results have shown negligible levels of mercury in the effluent and the Department determined that further monitoring for mercury is currently not necessary. This is consistent with the Department's Technical Operating Guidance Series 1.3.10 Mercury - SPDES Permitting, Multiple Discharge Variance, and Water Quality Monitoring which went into effect after the Durez SPDES permit was issued. Related to this, the requirement for a mercury minimization plan was also removed. The proposed modification also sets the effluent limit for Sum of Tetra-, Penta-, Hexa-, Hepta-, and Octa-chlorodibenzofurans at the lowest level that environmental testing laboratories are currently able to quantify, and removes limits and monitoring requirements that were superseded by requirements that went into effect on November 16, 2010 for hexachlorobutadiene, and Sum of Tetra-, Penta-, Hexa-, Hepta-, and Octa-chlorodibenzofurans. The Department is seeking public comment prior to making a final decision on permit issuance. A draft permit is available for review.

Availability of Application Documents:

Filed application documents, and Department draft permits where applicable, are available for inspection during normal business hours at the address of the contact person. To ensure timely service at the time of inspection, it is recommended that an appointment be made with the contact person.

State Environmental Quality Review (SEQR) Determination:

Project is an Unlisted Action and will not have a significant impact on the environment. A Negative Declaration is on file. A coordinated review was not performed.

SEQR Lead Agency: None Designated

State Historic Preservation Act (SHPA) Determination:

Cultural resource lists and map have been checked. No registered, eligible or inventoried archaeological sites or historic structures were identified at the project location. No further review in accordance with SHPA is required.

Coastal Management:

This project is not located in a Coastal Management area and is not subject to the Waterfront Revitalization and Coastal Resources Act.

Opportunity for Public Comment:

Comments on this project must be submitted in writing to the Contact Person no later than Apr 13, 2012.


Lisa Porter
NYSDEC Region 9 Headquarters
270 Michigan Ave
Buffalo, NY 14203

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