Information: NOTE: you have arrived at a step in the Design Sequence Flow Chart. This flow chart is used to determine your performance goal. For more information see this link
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For more information on the Design Sequence Flow Chart see the following:
*Flexible treatment options
*MIDS flow chart
*List of steps in flow chart


QUESTION:

Do any of the following conditions apply? (NOTE: If any condition applies, you do not need to answer the remaining questions.)

  • The site is located within a DWSMA, wellhead protection area or within 200 feet of a drinking water well and Can a Local Government Unit (LGU) provide a higher level of engineering review to ensure a functioning system that prevents adverse impacts to groundwater.

Yes

  • Karst is present within 1000 feet up-gradient or 100 feet down-gradient of the site, a local unit of government cannot provide a higher level of engineering review to ensure a functioning system that prevents adverse impacts to groundwater, and the BMP cannot be reloacted so that it is more than 1000 feet from karst.

Yes

  • Shallow groundwater or shallow bedrock is present within 3 feet of the bottom of the BMP and the BMP cannot be relocated or raised in elevation to achieve a 3 foot or greater separation from bedrock or groundwater.

Yes

  • Contaminated soil, contaminated groundwater, or hotspot runoff is present on the site and cannot be isolated or mitigated.

Yes

  • Soils on the site have an infiltration rate of less than 0.2 inches per hour, the BMP cannot be relocated to areas with a higher infiltration rate, the BMP cannot be sized to drain within 48 hours (24 hours in locations that are tributary to trout streams), and flexible Treatment Option 1 is not feasible.

Yes

  • Soils on the site have an infiltration rate greater than 8 inches per hour, the BMP cannot be relocated to an area with an infiltration rate lower than 8 inches per hour, or the subgrade cannot be modified to slow the infiltration rate to less than 8 inches per hour

Yes


No

PREVIOUS STEP

You determined that flexible Treatment option 1 is feasible.

Links

This page was last edited on 10 February 2014, at 19:40.

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