Saturday, April 4, 2009

Transportation Machinery Equipment Manufacture 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 Transportation Equipment, Industrial and Commercial Machinery Manufacturing Sector (Sector AB). Sector AB facilities are engaged in a wide range of product manufacturing, including:
a. manufacturing engines and turbines,
b. manufacturing farm and garden machinery and equipment,
c. manufacturing construction, mining, and materials handling machinery and equipment,
d. manufacturing metalworking machinery and equipment,
e. manufacturing special industry machinery, except metalworking machinery,
f. manufacturing general industrial machinery and equipment,
g. manufacturing refrigeration and service industry machinery,
h. manufacturing miscellaneous industrial and commercial machinery and equipment,
i. manufacturing motor vehicles and motor vehicle equipment,
j. manufacturing aircraft and parts,
k. manufacturing motorcycles, bicycles, and parts,
l. manufacturing guided missiles and space vehicles and parts, and
m. manufacturing miscellaneous transportation equipment.

These requirements are in addition to permit requirements that apply to all sectors.

In addition to routine inspection requirements, the operation 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 are:

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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