Difference between revisions of "Design sequence flow chart"
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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. | 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. | ||
| − | ==Conduct site review== | + | ==Preliminary information== |
| + | |||
| + | ===Conduct site review=== | ||
*Aerial Photos | *Aerial Photos | ||
*Topographic Maps | *Topographic Maps | ||
| Line 15: | Line 17: | ||
Inspect Site | Inspect Site | ||
| − | ==Define treatment goal== | + | ===Define treatment goal=== |
*Linear: 0.55 inches over impervious | *Linear: 0.55 inches over impervious | ||
*Nonlinear: | *Nonlinear: | ||
| − | ==DWSMA== | + | ==FLOW CHART== |
| + | |||
| + | ===DWSMA=== | ||
Is the site located in a DWSMA, wellhead protection area, or near a drinking well? | Is the site located in a DWSMA, wellhead protection area, or near a drinking well? | ||
| − | [[Design sequence flow chart#DWSMA1| | + | *[[Design sequence flow chart#DWSMA1|Yes]] |
| − | [[Design sequence flow chart#Utilities, structures, land use requirements| | + | *[[Design sequence flow chart#Utilities, structures, land use requirements|No]] |
| − | |||
| − | ===DWSMA1=== | + | ====DWSMA1==== |
*Select Flexible Treatment Option | *Select Flexible Treatment Option | ||
*(FTO) Alternative No. 2 | *(FTO) Alternative No. 2 | ||
| Line 32: | Line 35: | ||
*Provide DWSMA or well location map | *Provide DWSMA or well location map | ||
| − | ==Utilities, structures, land use requirements== | + | ===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? | 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#Utilities1|yes]] | ||
[[Design sequence flow chart|Karst, shallow groundwater, shallow bedrock|no]] | [[Design sequence flow chart|Karst, shallow groundwater, shallow bedrock|no]] | ||
| − | ==Utilities1=== | + | ====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=== | + | ====Utilities2==== |
Are Flexible Treatment Option Alternatives number 1 or number 2 feasible? | 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=== | + | ====Utilities3==== |
Investigate Off-Site Considerations: | Investigate Off-Site Considerations: | ||
#Banking within watershed with goal of: | #Banking within watershed with goal of: | ||
| Line 58: | Line 61: | ||
<font size=5>END</font size> | <font size=5>END</font size> | ||
| − | ===Utilities4=== | + | ====Utilities4==== |
*Select Flexible Treatment Option Alternative No. 1 or No. 2 | *Select Flexible Treatment Option Alternative No. 1 or No. 2 | ||
*Revise Treatment Goal | *Revise Treatment Goal | ||
| Line 65: | Line 68: | ||
[[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== | + | ===Karst, shallow groundwater, shallow bedrock=== |
Revision as of 18:32, 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
Preliminary information
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:
FLOW CHART
DWSMA
Is the site located in a DWSMA, wellhead protection area, or near a drinking well?
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