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:<p>c. Good Housekeeping (No additional requirements).</p>
 
:<p>c. Good Housekeeping (No additional requirements).</p>
 
:<p>d. Inspections.</p>
 
:<p>d. Inspections.</p>
::<p>1. If the Permittee performs wood surface protection and preservation activities, the Permittee shall inspect all processing areas that are subject to compliance with [http://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&SID=cb300fa9f91e1968bbefdc97dec8ef35&rgn=div5&view=text&node=40:27.0.1.1.6&idno=40 40 CFR 264 and 265, subp. W], to assess the effectiveness of BMPs used to eliminate all discharges of chemical preservatives. Any discharge from these areas is considered process wastewater and is not stormwater, and will require separate NPDES/SDS authorization.</p>
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::<p>1. If the Permittee performs wood surface protection and preservation activities, the Permittee shall inspect all processing areas that are subject to compliance with [http://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&SID=cb300fa9f91e1968bbefdc97dec8ef35&rgn=div5&view=text&node=40:27.0.1.1.6&idno=40 40 CFR pt. 264 and 265, subp. W], to assess the effectiveness of BMPs used to eliminate all discharges of chemical preservatives. Any discharge from these areas is considered process wastewater and is not stormwater, and will require separate NPDES/SDS authorization.</p>
::<p>2. The Permittee shall conduct inspections of treated wood storage areas to assess the effectiveness of BMPs used to eliminate or minimize the discharge of stormwater that has contacted wood preservation chemicals.</p>
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::<p>2. The Permittee shall conduct inspections of treated wood storage areas to assess the effectiveness of BMPs used to minimize or eliminate the discharge of stormwater that has contacted wood preservation chemicals.</p>
 
:<p>e. Preventive Maintenance (No additional requirements).</p>
 
:<p>e. Preventive Maintenance (No additional requirements).</p>
 
:<p>f. Spills and Leaks (No additional requirements).</p>
 
:<p>f. Spills and Leaks (No additional requirements).</p>
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:<p>h. Other Industry Specific Control Measures.</p>
 
:<p>h. Other Industry Specific Control Measures.</p>
 
::<p>The Permittee shall provide complete secondary containment, for all significant materials stored indoors and outdoors, (e.g. arsenic, chromium, zinc, copper, and phenolic solution storage tanks and structures). Also, the Permittee shall drain contained stormwater from outdoor storage tanks and structures only after inspection demonstrates that no stormwater contact with solutions has occurred.</p>
 
::<p>The Permittee shall provide complete secondary containment, for all significant materials stored indoors and outdoors, (e.g. arsenic, chromium, zinc, copper, and phenolic solution storage tanks and structures). Also, the Permittee shall drain contained stormwater from outdoor storage tanks and structures only after inspection demonstrates that no stormwater contact with solutions has occurred.</p>
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====6. SWPPP Requirements====
 
====6. SWPPP Requirements====
 
:<p>In addition to the requirements of [[PART IV. STORMWATER POLLUTION PREVENTION PLAN (SWPPP)|Part IV]], the Permittee shall also comply with the following:</p>
 
:<p>In addition to the requirements of [[PART IV. STORMWATER POLLUTION PREVENTION PLAN (SWPPP)|Part IV]], the Permittee shall also comply with the following:</p>

Revision as of 15:32, 30 April 2015

A. Timber Products

1. Authorized Stormwater Discharges

The requirements in Sector A apply to stormwater discharges associated with industrial activity from timber products facilities as identified by the industrial activity code specified in Table 5 of Appendix D.

2. Industrial Activities Authorized by Sector A Permittees under Sector A are primarily engaged in the following types of activities:

a. Log storage or handling areas (wet deck storage areas only authorized if no chemical additives are used in the spray water applied to the logs).

b. Mills, including merchant, lath, shingle, cooperage stock, planing, plywood, and veneer.

c. Producing lumber and wood-based materials.

d. Wood preserving.

e. Manufacturing finished articles made entirely of wood or related materials except wood kitchen cabinet manufacturers.

f. Manufacturing wood buildings or mobile homes.

3. Limitation on Authorization

Discharges not authorized by this permit:

Stormwater discharges from areas where there may be contact with the chemical formulations sprayed to provide surface protection. These discharges must be authorized by a separate NPDES/SDS permit.

4. Sector-Specific Definitions (No Additional Definitions)

5. Stormwater Controls

a. Employee Training (No additional requirements).

b. Erosion and Sedimentation Controls (No additional requirements).

c. Good Housekeeping (No additional requirements).

d. Inspections.

1. If the Permittee performs wood surface protection and preservation activities, the Permittee shall inspect all processing areas that are subject to compliance with 40 CFR pt. 264 and 265, subp. W, to assess the effectiveness of BMPs used to eliminate all discharges of chemical preservatives. Any discharge from these areas is considered process wastewater and is not stormwater, and will require separate NPDES/SDS authorization.

2. The Permittee shall conduct inspections of treated wood storage areas to assess the effectiveness of BMPs used to minimize or eliminate the discharge of stormwater that has contacted wood preservation chemicals.

e. Preventive Maintenance (No additional requirements).

f. Spills and Leaks (No additional requirements).

g. Management of Runoff (No additional requirements).

h. Other Industry Specific Control Measures.

The Permittee shall provide complete secondary containment, for all significant materials stored indoors and outdoors, (e.g. arsenic, chromium, zinc, copper, and phenolic solution storage tanks and structures). Also, the Permittee shall drain contained stormwater from outdoor storage tanks and structures only after inspection demonstrates that no stormwater contact with solutions has occurred.

6. SWPPP Requirements

In addition to the requirements of Part IV, the Permittee shall also comply with the following:

a. Facility Map (No additional requirements).

b. Inventory of Exposed Materials.

If the Permittee uses chlorophenolic, Pentachlorophenol, creosote, or chromiumcopper-arsenic formulations for wood surface protection or preserving, the following shall be identified and documented in the SWPPP:

1. Areas where contaminated soils from treatment equipment, and stored materials still remain.

2. The management practices employed to prevent the contact of these materials with stormwater runoff.

c. Potential Pollutant Sources (No additional requirements).

d. Description of Stormwater Controls.

The Permittee shall describe BMPs implemented to address the following sources for pollution potential:

1. Log, lumber and wood product storage areas.

2. Residue storage areas.

3. Chemical storage areas.

If the Permittee performs wood surface protection and preservation activities, address the specific BMPs for these activities.

7. Monitoring and Reporting Requirements

In accordance with the monitoring requirements of Parts V and VI, the Permittee shall monitor the applicable parameters in Table A-1, below:

Sector-Specific Benchmark Values and Effluent Limitations: Sector A - Timber products. Discharges may be subject to requirements for more than one sector or subsector.
Link to this table

Subsector Parameter Benchmark Values Effluent limits
A1 General Sawmills/Planing Mills COD (Chemical Oxygen Demand) 20 mg/L Effluent Monitoring Not Required
Solids, Total Suspended (TSS) 100 mg/L 2 Effluent Monitoring Not Required
Zinc, Total (as Zn) 0.234 mg/L 1 Effluent Monitoring Not Required
A2 Wood Preserving Arsenic, Total (as As) 0.680 mg/L Effluent Monitoring Not Required
Copper, Total (as Cu) 0.028 mg/L 1 Effluent Monitoring Not Required
Chromium, Total (as Cr) 3.5 mg/L 1 Effluent Monitoring Not Required
Pentachlorophenol (PCP) 0.011 mg/L Effluent Monitoring Not Required
Solids, Total Suspended (TSS) 100 mg/L 2 Effluent Monitoring Not Required
A3 Log Storage and Handling Solids, Total Suspended (TSS) 100 mg/L 2 Effluent Monitoring Not Required
A4 Discharges From Wet Decking Storage Areas pH 4 Benchmark Monitoring Not Required 6.0-9.0 SU
Debris Benchmark Monitoring Not Required No discharge of debris that will not pass through a 2.54cm (1 inch) round opening, instantaneous maximum (visual assessment) 3
A5 Hardwood Dimension and Flooring Mills COD (Chemical Oxygen Demand) 120 mg/L Effluent Monitoring Not Required
Solids, Total Suspended (TSS) 100 mg/L 2 Effluent Monitoring Not Required

1The benchmark values of some metals are influenced by water hardness. For these parameters, the Permittee may determine the hardness of the stormwater discharges to identify the applicable ‘hardness range’ for determining their benchmark value. See Table 4 of Appendix B for hardness dependent benchmark values in accordance with Minn. R. 7050.0222 and Minn. R. 7052.0100.
2If the Permittee is required to comply with Appendix A, part F.1, the benchmark value for Solids, Total Suspended (TSS) is 65 mg/L, instead of 100 mg/L.
3The Permittee is authorized under this permit to conduct a visual observation sufficient to determine the presence of debris that will not pass through a 2.54 cm (1inch) round opening and is not required to use a laboratory certified by the MDH or registered by the MPCA for this analysis.


8. Use of Infiltration Devices and/or Industrial Stormwater Ponds for Stormwater Treatment and Disposal

a. Industrial Stormwater Ponds

1. The Permittee of a sector A industrial facility not operating under an SIC code of 2491 (wood preserving) is authorized to use industrial stormwater ponds for stormwater management without additional restrictions.

2. The Permittee of a sector A industrial facility operating under an SIC code of 2491 (wood preserving) is authorized to use industrial stormwater ponds for stormwater management provided that any industrial stormwater pond constructed after the effective date of this permit meets the following design criteria. Any Permittee required to comply with this part is not authorized to utilize the benchmark monitoring waiver described in Part V.B.6.a of the permit.

a. The industrial stormwater pond must be lined with a synthetic liner that is chemically compatible with materials expected to enter the pond, must be Ultra Violet (UV) stable, and must be designed to restrict infiltration to less than 500 gallons per acre per day.

b. The industrial stormwater pond must be designed in accordance with accepted engineering practices. (See Agency “Recommended Pond Design Criteria” December 2009, Document number: wq-wwtp5-53 and any applicable supporting technical criteria)

b. Infiltration Devices

1. The permittee of a sector A industrial facility not operating under an SIC code of 2491 (wood preserving) is authorized to use a designed infiltration device for industrial stormwater management and is not required to comply with Part VII.A.8.b.2, below.

2. The permittee of a sector A industrial facility operating under an SIC code of 2491 (wood preserving) is authorized to use a designed infiltration device, implemented prior to the effective date of this permit, for stormwater management provided the Permittee complies with the following requirements:

a. The Permittee shall conduct benchmark monitoring in accordance with the terms and conditions of Part V of all industrial stormwater prior to infiltration. However, any Permittee required to comply with this part that is using a designed infiltration device to manage industrial stormwater is not authorized to utilize the benchmark monitoring waiver described in Part V.B.6.a of the permit.

b. If the Permittee has a designed infiltration device operating prior to the effective date of this permit, the Permittee is authorized to continue using that device. However, on or after the effective date of this permit, the Permittee is not authorized to construct new infiltration devices, expand infiltration activities or practices that result in infiltration, or expand volume of infiltration.

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