Thursday, February 4, 2010

Food Products Sector U - ADEQ Draft Industrial Stormwater Requirements

The Arizona Department of Environmental Quality (ADEQ) recently released an updated 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 draft ADEQ Industrial Stormwater Permit

Some key changes in the new permit are the additional requirements for 30 different sector specific requirements. The requirements described are proposed for the Food and Kindred Products Sector (Sector U). Sector U covers a fairly broad range of facility types, including meat products, dairy products, bakeries, beverage products, and many others. These requirements are in addition to permit requirements that apply to all sectors.

Employee Training:
SWPPP training programs must include information on pest control

Quarterly inspections must include:
a) waste management units;
b) vents and stacks associated with industrial activities;
c) spoiled product and broken product container holding areas;
d) animal holding pens;
e) staging areas; and
f) air pollution control equipment.

Stormwater Pollution Prevention Plan (SWPPP) Content:
The SWPPP must identify:
1) vents and stacks from cooking, drying, and similar operations;
2) dry product vacuum transfer lines;
3) animal holding pens;
4) spoiled product; and broken product container storage areas.

Potential Pollutant Sources:
The SWPPP must describe application and storage of pest control chemicals (e.g., rodenticides, insecticides, fungicides) used on plant grounds.

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:

Grain Mill Products:
TSS 100 mg/L

Fats and Oils Products:
TSS 100 mg/L
BOD5 30 mg/L
COD 120 mg/L
Nitrate 0.68 mg/L

[Read more about what a 100 mg/L benchmark for TSS relates to]

[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
Caltha LLP Website

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