Saturday, April 4, 2009

Electronic Electrical Manufacturing 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 Electronic and Electrical Equipment and Components Manufacturing Sector (Sector AC). Sector AC facilities are engaged in a range of product manufacturing, including a. measuring, analyzing, and controlling instruments, photographic and optical goods, watches and clocks; computer and office equipment; and electronic and electrical equipment and components. 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 depend on product type:

Electronic, Electrical, Photographic,and Optical Goods (SIC 3571-3579, 3812-3873):
TSS 100 mg/L

Electronic and Electrical Equipment and Components, except Computers (SIC 3612-3699):
TSS 100 mg/L
Total Copper 0.028 mg/L
Total Lead 0.164 mg/L

Note: Benchmarks for zinc and iron were derived based on the Aquatic Life Standards for these parameters in Minnesota Rules.

[Read more about use of Aquatic Life Standards to derive stormwater benchmarks]
[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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