Saturday, April 4, 2009

Asphalt - Lubrication Products Sector - SWPPP - Stormwater Permit Proposed Requirements

On July 6, 2009, the Minnesota Pollution Control Agency released its proposed multisector industrial stormwater discharge general permit. This permit, once promulgated, 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]

Caltha LLP will be conducted seminars on the proposed sector requirements in July & August 2009. Caltha MPCA Industrial Stormwater Permit Requirements Seminars

The proposed permit details requirements for 29 different industrial sectors. The requirements described below are proposed 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 proposed 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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