Difference between revisions of "Stormwater Infiltration and soil/groundwater contamination: A guide to the Construction Stormwater Permit requirements"
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[[file:Contaminated site 3.jpg|300px|thumb|alt=schematic of contaminated soil]] | [[file:Contaminated site 3.jpg|300px|thumb|alt=schematic of contaminated soil]] | ||
| − | This page | + | The construction stormwater permit prohibits infiltration practices if infiltration will affect existing contamination in groundwater or soil. The permit requires permittees proposing stormwater infiltration to analyze their specific site to determine if infiltration is appropriate. This page explains the minimum assessment required in order to demonstrate compliance with the permit at sites with potential or known soil and/or groundwater contamination. |
==Permit language== | ==Permit language== | ||
Permittees are prohibited from constructing infiltration systems where high levels of contaminants in soil or groundwater may be mobilized by the infiltrating stormwater. Permittees must either complete the MPCA's site screening assessment checklist or conduct their own assessment to determine the suitability for infiltration. The assessment must be retained with the SWPPP. | Permittees are prohibited from constructing infiltration systems where high levels of contaminants in soil or groundwater may be mobilized by the infiltrating stormwater. Permittees must either complete the MPCA's site screening assessment checklist or conduct their own assessment to determine the suitability for infiltration. The assessment must be retained with the SWPPP. | ||
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==MPCA's screening assessment tool== | ==MPCA's screening assessment tool== | ||
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==Guidance== | ==Guidance== | ||
[[Stormwater infiltration and contaminated soils and groundwater|Access guidance on Stormwater infiltration and contaminated soils and groundwater]] | [[Stormwater infiltration and contaminated soils and groundwater|Access guidance on Stormwater infiltration and contaminated soils and groundwater]] | ||
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| + | For more information on how to determine if high levels of contamination exist at a site, [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_infiltration_guidance_for_sites_with_known_or_high_potential_for_soil_or_groundwater_contamination_on_or_off-site#What_is_a_high_level_of_contamination link here]. | ||
Revision as of 16:58, 4 April 2018
The construction stormwater permit prohibits infiltration practices if infiltration will affect existing contamination in groundwater or soil. The permit requires permittees proposing stormwater infiltration to analyze their specific site to determine if infiltration is appropriate. This page explains the minimum assessment required in order to demonstrate compliance with the permit at sites with potential or known soil and/or groundwater contamination.
Permit language
Permittees are prohibited from constructing infiltration systems where high levels of contaminants in soil or groundwater may be mobilized by the infiltrating stormwater. Permittees must either complete the MPCA's site screening assessment checklist or conduct their own assessment to determine the suitability for infiltration. The assessment must be retained with the SWPPP.
MPCA's screening assessment tool
- Access the MPCA's site screening assessment checklist: This is an Excel file
- Access the guidance: Screening assessment for contamination at potential stormwater infiltration sites: This page provides guidance for using MPCA's site screening checklist
- Access example screening assessments: This links to examples that utilize the above guidance, including the screening assessment
Guidance
Access guidance on Stormwater infiltration and contaminated soils and groundwater
For more information on how to determine if high levels of contamination exist at a site, link here.