Tuesday, February 2, 2010

Fabricated Metal Products Sector AA - Arizona Permit Requirements

The Arizona Department of Environmental Quality (ADEQ) released its new multisector industrial stormwater discharge general permit, known officially as the AZPDES Multi-Sector General Permit, or MSGP 2010. This permit will replace the existing industrial stormwater permit, which expired in 2005.

Review a summary of the ADEQ Industrial Stormwater Permit

The permit details requirements for 30 different industrial sectors. The requirements described below are for the Fabricated Metal Products Sector (Sector AA). Sector AA facilities include fabricated metal products (except machinery and transportation equipment) jewelry, silverware, and plated ware, and fabricated metal coating, engraving and allied services. These requirements are in addition to permit requirements that apply to all sectors.

The facility must conduct inspections addressing areas associated with spent solvents, chemical storage areas, and outdoor paint areas.

Good Housekeeping:
The pollution prevention program must implement measures for controlling or recovering scrap metals, fines, and metal dust. The SWPPP must include measures for containing materials within storage handling areas. The SWPPP must describe and implement measures for storage of metal working fluids.

Leaks and Spills:
The spill prevention program must address chromium, toluene, pickle liquor, sulfuric acid, zinc and other water priority chemicals, and hazardous chemicals and wastes.

The spill prevention plan must describe and implement measures to control and clean up spills of solvents and other liquid cleaners, control sand buildup and disbursement from sand-blasting operations, and prevent exposure of recyclable wastes including rinse waters. Each operation must use monitoring equipment or other devices to detect and control leaks and overflows of lubricating oil and hydraulic fluid operations and install perimeter controls, or equivalent measures.

Stormwater Monitoring Benchmarks:
All facilities are required to conduct visual and chemical (benchmark) monitoring. For benchmark monitoring, the benchmark concentrations or values depend on product type:

Fabricated Metal Products, (SIC 3411-3499; 3911-3915)
Total Aluminum 0.75mg/L
Total Iron 1.0 mg/L
Total Zinc 0.04 to 0.26 mg/L, depending on hardness

Fabricated Metal Coating and Engraving (SIC 3479):
Nitrate 0.68 mg/L
Total Zinc 0.04 to 0.26 mg/L, depending on hardness

[Read more about ADEQ stormwater monitoring requirements and industrial stormwater benchmarks]

Looking for other sector information? Click here for information on proposed stormwater requirements for specific sector.

Caltha LLP provides expert consulting services to public and private sector clients nationwide to address Stormwater Permitting & Regulatory Support, Stormwater Pollution Prevention Plans (SWPPP), Stormwater Monitoring and Stormwater Training.

For further information contact Caltha LLP at
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