Runoff from rain or snow events picks up pesticides, fertilizers, automotive fluids, sediment, pet waste, trash and more that is carried into storm drains. These storm drains discharge directly from streets to surface waters like lakes, rivers, wetlands, and streams. The Municipal Separate Storm Sewer System (MS4) permit program was designed to reduce this type of surface water pollution.

什么是MS4许可证？

MS4是一个公共拥有和运营的交通网络（雨水道、集水池、沟渠、排水沟等），收集雨水和融雪，最终排放到地表水。

明尼苏达污染控制局(MPCA公司) requires certain public entities (including cities, townships, counties, military bases, hospitals, prison complexes, highway departments, universities, sewer districts, etc.) to take action to minimize potential impacts to surface waters by mapping and inspecting these stormwater conveyance systems, developing stormwater pollution prevention programs and adopting best practices.

Why is the MS4 Permit being Reissued on November 16, 2020?

根据国家法律,The MS4 general permit is issued for five years, after which it must be reissued for the next five-year period. As part of the reissuance, MPCA staff consult with permittees and stakeholders and solicit public comment to look for ways to improve and revise the permit.

What do I need to know about the Reissued Permit?

• Existing MS4 permittees will have 150 days (until April 15, 2021) to complete and submit the permit application forms to the MPCA.
• After permit coverage is issued to the MS4 permittee, they will have up to 12 months to meet the new permit requirements.

重新签发的许可证有什么变化？

There have been several significant changes to the new MS4 permit and complying with these new requirements can be daunting.

• 在整个许可证中增加了特殊性，如教育活动、培训和检查的书面程序和频率。
• 在整个许可证中增加了各种文件要求，以便MPCA和许可证持有人能够更好地评估许可证合规性和雨水污染预防计划（SWPPP）的有效性
• New application requirements for total maximum daily loads (TMDLs).
• New requirements to address chloride from deicing material and bacteria from pet waste.
• 对重建项目有更具保护性的施工后雨水管理要求。
• 基于性能的方法来解决氯化物、细菌和温度的TMDL。

如果您需要帮助，是否需要permit, completing applications, conducting internal MS4 program audits, stormwater pond sediment sampling, assessing your stormwater conveyance systems or designing stormwater pollution prevention计划, choosing the right environmental consultants can help streamline the process. Braun Intertec has experienced stormwater professionals that can assist in these地区确保你达到并保持合规。