Difference between revisions of "Design sequence flow chart"
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==Define treatment goal== | ==Define treatment goal== | ||
| − | *Linear: 0.55 inches over impervious*Nonlinear: *Select Flexible Treatment Option | + | *Linear: 0.55 inches over impervious |
| + | *Nonlinear: | ||
| + | |||
| + | ==DWSMA== | ||
| + | Is the site located in a DWSMA, wellhead protection area, or near a drinking well? | ||
| + | [[Design sequence flow chart#DWSMA1|yes]] | ||
| + | [[Design sequence flow chart#Utilities, structures, land use requirements|no]] | ||
| + | |||
| + | |||
| + | ===DWSMA1=== | ||
| + | *Select Flexible Treatment Option | ||
*(FTO) Alternative No. 2 | *(FTO) Alternative No. 2 | ||
*Revise Treatment Goal | *Revise Treatment Goal | ||
| Line 22: | Line 32: | ||
*Provide DWSMA or well location map | *Provide DWSMA or well location map | ||
| − | ==Utilities, structures, land use requirements==Are there existing or proposed utilities, structures, or land use requirements (density, parking, setbacks, etc.) that make the Treatment Goal infeasible or | + | ==Utilities, structures, land use requirements== |
| + | Are there existing or proposed utilities, structures, or land use requirements (density, parking, setbacks, etc.) that make the Treatment Goal infeasible or cost prohibitive? | ||
| + | [[Design sequence flow chart#Utilities1|yes]] | ||
| + | [[Design sequence flow chart|Karst, shallow groundwater, shallow bedrock|no]] | ||
| + | |||
| + | ==Utilities1=== | ||
Is BMP relocation possible? | Is BMP relocation possible? | ||
[[Design sequence flow chart|Karst, shallow groundwater, shallow bedrock|yes]] | [[Design sequence flow chart|Karst, shallow groundwater, shallow bedrock|yes]] | ||
[[Design sequence flow chart|Utilities2|no]] | [[Design sequence flow chart|Utilities2|no]] | ||
| − | ===Utilities2===Are Flexible Treatment Option Alternatives number 1 or number 2 feasible? | + | ===Utilities2=== |
| + | Are Flexible Treatment Option Alternatives number 1 or number 2 feasible? | ||
[[Design sequence flow chart#Utilities4|yes]] | [[Design sequence flow chart#Utilities4|yes]] | ||
[[Design sequence flow chart#Utilities3|no]] | [[Design sequence flow chart#Utilities3|no]] | ||
| − | ===Utilities3===Investigate Off-Site Considerations:#Banking within watershed with goal of:*Linear: 0.55 inches over impervious*Nonlinear: 1.1 inches over impervious | + | ===Utilities3=== |
| + | Investigate Off-Site Considerations: | ||
| + | #Banking within watershed with goal of: | ||
| + | *Linear: 0.55 inches over impervious | ||
| + | *Nonlinear: 1.1 inches over impervious | ||
#Cash as determined by LGU | #Cash as determined by LGU | ||
| Line 37: | Line 57: | ||
<font size=5>END</font size> | <font size=5>END</font size> | ||
| − | ===Utilities4===*Select Flexible Treatment Option Alternative No. 1 or No. 2 | + | |
| + | ===Utilities4=== | ||
| + | *Select Flexible Treatment Option Alternative No. 1 or No. 2 | ||
*Revise Treatment Goal | *Revise Treatment Goal | ||
| − | *Provide site survey, maps, regulations, and/or cost estimates documenting infeasibility and cost-prohibitive nature of meeting the | + | *Provide site survey, maps, regulations, and/or cost estimates documenting infeasibility and cost-prohibitive nature of meeting the original Treatment Goal |
| − | [[Design sequence flow chart#Karst, shallow groundwater, shallow bedrock|next | + | [[Design sequence flow chart#Karst, shallow groundwater, shallow bedrock|next]] |
| − | |||
| − | |||
| − | == | + | ==Karst, shallow groundwater, shallow bedrock== |
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Revision as of 18:29, 8 April 2013
This is intended to take you through a design sequence that allows you to determine the appropriate performance goal at a site. Follow the questions below sequentially to arrive at a performance goal appropriate for your site.
Contents
Conduct site review
- Aerial Photos
- Topographic Maps
- County Soil Surveys
- County Geologic Atlas
- Local Groundwater Levels
- Soil Borings
- MPCA Listing of Potentially Contaminated Sites
- TMDLs
- Local water quality standards
Speak with Local Landowners or others knowledgeable about the site
Inspect Site
Define treatment goal
- Linear: 0.55 inches over impervious
- Nonlinear:
DWSMA
Is the site located in a DWSMA, wellhead protection area, or near a drinking well? yes no
DWSMA1
- Select Flexible Treatment Option
- (FTO) Alternative No. 2
- Revise Treatment Goal
- No infiltration practices allowed
- Provide DWSMA or well location map
Utilities, structures, land use requirements
Are there existing or proposed utilities, structures, or land use requirements (density, parking, setbacks, etc.) that make the Treatment Goal infeasible or cost prohibitive? yes Karst, shallow groundwater, shallow bedrock|no
Utilities1=
Is BMP relocation possible? Karst, shallow groundwater, shallow bedrock|yes Utilities2|no
Utilities2
Are Flexible Treatment Option Alternatives number 1 or number 2 feasible? yes no
Utilities3
Investigate Off-Site Considerations:
- Banking within watershed with goal of:
- Linear: 0.55 inches over impervious
- Nonlinear: 1.1 inches over impervious
- Cash as determined by LGU
Provide site survey, maps, regulations, and/or cost estimates documenting infeasibility and cost-prohibitive nature of meeting the original Treatment Goal or FTO Alternatives
END
Utilities4
- Select Flexible Treatment Option Alternative No. 1 or No. 2
- Revise Treatment Goal
- Provide site survey, maps, regulations, and/or cost estimates documenting infeasibility and cost-prohibitive nature of meeting the original Treatment Goal