Monday, February 1, 2010

Auto Vehicle Salvage Yard Sector - ADEQ Proposed Requirements

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

Review a summary of the ADEQ Industrial Stormwater Permit

The proposed permit details requirements for 30 different industrial sectors. The requirements described below are proposed for the Automobile Salvage Yards Sector (Sector M). Sector M includes sites primarily engaged in the dismantling or wrecking used motor vehicles for parts recycling or resale and scrap. These requirements are in addition to permit requirements that apply to all sectors.

Employee Training:
The SWPPP must address the following areas in the employee training program: proper handling (collection, storage, and disposal) of oil, used mineral spirits, anti-freeze, mercury switches, freon, and solvents.

Good Housekeeping:
The SWPPP must include to the maximum extent feasible:
1) store all batteries indoors;
2) recycle lead battery cable ends and wheel balancing weights;
3) remove all fluids from vehicles and recycle or dispose accordingly;
4) remove and segregate mercury switches and mercury containing devices;
5) recycle fuels,
6) remove and dispose of freon as required with complete avoidance of venting to atmosphere;
7) remove and dispose of glycols as required;
8) remove and recycle all lead parts;
9) separate and recycle, if feasible, plastics or dispose as solid waste;
10) store all engines and transmissions (that have been removed from vehicles) in covered areas not exposed to precipitation.

The site must immediately inspect vehicles arriving at the facility for leaks. The site must be inspected quarterly for signs of leakage, all equipment containing oily parts, hydraulic fluids, any other types of fluids, or mercury switches; and also inspect all vessels and areas where hazardous materials and general automotive fluids are stored, including mercury switches, brake fluid, transmission fluid, freon, and antifreeze.

Stormwater Controls:
Each site must implement the following management practices: berms or drainage ditches on the property line (to help prevent run-on from neighboring properties); installation of detention ponds; installation of filtering devices such as sand filter or mixed media filters, and oil and water separators. Engines and transmissions, and similar oily parts shall be stored in covered areas or, at a minimum, be covered with impermeable tarps or similar material to eliminate contact with stormwater; and above ground liquid storage tanks must have secondary containment.

Stormwater Monitoring Benchmarks:
All facilities are required to conduct visual and chemical (benchmark) monitoring. For benchmark monitoring, the benchmark concentrations or values apply to all facility types:

TSS 100 mg/L
Total Aluminum 0.75 mg/L
Total Lead 0.014 to 0.262 mg/L, depending on hardness
Total Iron 1.0 mg/L

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

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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