ENB Region 9 Completed Applications 01/05/2005

The applicant proposes to reshape 100 feet of eroded stream bank using material removed from a gravel bar opposite the eroded bank and remove obstructing debris and trees.  The project is located along New Albion Creek at the confluence with Conewango Creek and Tributary 56 of  Conewango Creek in the hamlet of New Albion.

Pursuant to the department permit modification procedure termed the Environmental Benefit Permit Strategy (EBPS), the City of Dunkirk submitted a Form 2-A application along with priority pollutant scan results for metals, volatiles, acid compounds and base neutrals in an August 5, 2003 letter.  The current wastewater treatment is a 6.0 MGD biological secondary treatment plant with an effluent discharge to Lake Erie.

Parameters        

Flow:    The flow reporting “Frequency” was changed to 12-Month Rolling     Average (MRA).  A rolling average is an average which is calculated for a moving time period rather than a specific calendar time period.  Based on TOGS 1.3.3, alternate means of flow limit and flow based limitations can be considered for wastewater treatment facilities receiving flows from combined sewer systems.  An MRA was included in this permit due to expected peak flows the permit might receive during wet weather events.

Action Level Parameters:   Statistical analyses of 36 months of data (3-year Discharge Monitoring Report from November 1998 to March 2003) were used to calculate a 99^th percentile value for the existing Action Level parameters.  Values for some parameters were either reduced or increased based on these analyses

Chloroform:   The Water Quality Based Effluent Limit (WQBEL) of 3.04 lbs/day was used.

Chlorine Residual:  Water Quality evaluation indicates that there is a “reasonable potential” that chlorine residual will result in exceedance of ambient water quality criteria (AWQC).  Therefore, a TMDL was used to establish waste load allocations for the chlorine residual of 0.512 mg/l for this facility.

Di-n-Octyl Phtalate:  Water Quality  evaluation also shows that this parameter has a “reasonable potential” to result in the AWQC exceedance.  The calculated receiving water concentration is less than the WQ criteria for this parameter.  Therefore, a WQBEL of 5.0 lbs/day was placed in the permit.

Outfall 001A:  Additional monitoring requirements were added in accordance with TOGS 1.3.3 and the Environmental Protection Agency’s (EPA) 1994 National CSO Control Policy.

Combined Sewer Overflows (CSO):

Best Management Practices (BMPs)

CSO BMPs were updated in accordance with the federal Wet Weather Water Quality Act of 2000. These BMPs are consistent with the EPA’s 1994 National CSO Control Policy and its Nine Minimum Controls. These BMPs are non-capital intensive requirements which are intended to maximize treatment of combined sewage and minimize combined sewage discharges.

Long-Term Control Plan (LTCP)

The LTCP is included in the permit, in accordance with the federal Wet Weather Water Quality Act of 2000 and EPA’s 1994 National CSO Control Policy.  The LTCP requires the permittee to characterize the combined sewer system, develop CSO control alternatives according to one of two approaches, evaluate the alternatives using a cost/performance  analysis, and then implement the chosen option.

The proposal is for the establishment of Extension No. 5 of Town of Aurora Water District #10 and the taking of a maximum of 42,600 gallons per day, from the Erie County Water Authority under the terms of a Lease Management Agreement. The project includes the installation of 9,000 linear feet of eight inch watermain and associated valves, fire hydrants and appurtenances. The watermain is to be installed on Tannery Road between Davis Road and West Branch Cazenovia Creek, Davis Road from its intersection with Mill Road south to its intersection with Old Glenwood Road, and on Davis Road from the Aurora/Colden Town border 1,800 feet north on Davis Road. Application materials and documents in support of the request for a permit can be reviewed at the regional office listed in this notice.