Thursday, February 18, 2010

Asphalt Paving Roofing Materials & Lubricant Manufacturing Sector Requirements

The Minnesota Pollution Control Agency (MPCA) has issued its revised multi-sector industrial stormwater discharge general permit (MSGP). This permit will replace the existing industrial stormwater permit, which expired in October of 2002.

[Read a summary of the overall Minnesota permit, stormwater monitoring, and sector requirements]

All manufacturing, industrial and “industrial-like” sites that require a permit to discharge stormwater will be required to come into compliance with the revised permit, and to submit an application for permit coverage by either June 1, August 1 or October 1, depending on their industrial sector.

Click here to review a list affected industrial sectors and application deadlines for each sector

The revised permit details requirements for 29 different industrial sectors. The requirements described below are for the Asphalt Paving and Roofing Materials and Lubricant Manufacturing Sector (Sector D). Sector D covers several facility types, including manufacturing asphalt paving mixtures blocks and roofing materials, portable asphalt plant facilities, and manufacturing lubricating oils and greases and miscellaneous products of petroleum and coal. These requirements are in addition to permit requirements that apply to all sectors.

Inspections must include the following areas: material storage and handling areas; liquid storage tanks, hoppers, and silos; vehicle and equipment maintenance, cleaning, and fueling areas; and material handling vehicles, equipment, and processing areas.

The facility must conduct two of the monthly inspections during runoff events. One of the inspections must be performed during a snow melt runoff event. Each inspection must include a visual assessment of the runoff to identify any visible sheens or films that indicate the presence of oil or grease in the discharge.

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:

Permanent Asphalt Paving and Roofing Materials (SIC 2951, 2952):
TSS 100 mg/L

Discharges from Areas Where Production of Asphalt Emulsions Occur (SIC 2951, 2952):
TSS 100 mg/L
Oil & Grease none
pH 6-9

Portable Asphalt Pavement Plants:
TSS 100 mg/L

Miscellaneous Products of Petroleum and Coal (SIC 2992, 2999):
TSS 100 mg/L

[Read more about how benchmarks are used under the new MPCA industrial permit]
[Read more about what a 100 mg/L benchmark for TSS relates to]

Looking for other sector information?
Click here for a link to all sector requirements

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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