BMP Selection and Treatment Trains

Selection screens typically combine pollutant of concern, soils, groundwater, utilities, and climate constraints. Hierarchy language (avoid, minimize, treat, detain) is widespread. Manufactured devices are often allowed only after upstream hierarchy steps or when infiltration is infeasible.

Karst and high-groundwater screens; arid retention emphasis; cold-climate plant and underdrain constraints.

Whether green-infrastructure-first is a national requirement. How tightly to couple screens to local soils maps.

Numbered footnotes for guidance clauses and atlas notes. Field-verified entries come from structured atlas evidence; corpus-pattern entries are keyword-matched excerpts.

1. [1]AlaskaAlaskaField-verifiedpp. 180–181

   “Primary Secondary Secondary Secondary Extended Storage Pond High Low Primary Secondary Secondary Secondary Wet Vaults Medium Lowa Primary Secondary Secondary Minor Detention Dry Pond High Low Secondary Minor Minor Minor Oversized Pipes High Low Minor Minor Minor Minor Oil/Grit”

2. [2]AlabamaAlabamaField-verifiedpp. 18–19

   “3) modification of the surface drainage pattern, including the associated development of stormwater management facilities. Summary of Hazards Associated with Land Development On-site Land development clearly increases potential erosion and sediment hazards on-sit”

3. [3]MontanaMontanaField-verifiedContents, Chapter 5

   “Infiltration Basin ... Bioretention ... Permeable Pavement Systems ... Dispersion ... Biofiltration Swale ... Extended Detention Basin ... Wet Detention Basin ... Proprietary Treatment Devices”

4. [4]California Department of Transportation (Caltrans)CaliforniaField-verifiedSection 2.2, Table 2-1, Pages 2-5 to 2-7

   “Caltrans Construction Site BMPs are divided into six categories, as shown in Table 2-1: Temporary Soil Stabilization, Temporary Sediment Control, Wind Erosion Control, Tracking Control, Non-Stormwater Management, Waste Management and Materials Pollution Control”

5. [5]CaliforniaCaliforniaField-verifiedTable 3-1, Page 3-1

   “Table 3-1 Municipal Fixed Facility BMPs: Non-Stormwater Management, Vehicle and Equipment Management, Material and Waste Management, Building and Grounds Management, Over Water Activities, General Stormwater Management”

6. [6]ConnecticutConnecticutField-verifiedPage 110-111, Functional Categories of Structural Stormwater BMPs

   “This Manual includes the following major categories and types of structural stormwater BMPs that are recommended for use in Connecticut, based on their primary function: Pretreatment BMPs, Infiltration BMPs, Filtering BMPs, Stormwater Pond BMPs, Stormwater Wetland BMPs, Water Quality Conveyance BMPs, Stormwater Reuse B”

7. [7]GeorgiaGeorgiaField-verified199

   “Bioretention Basin; Bioslopes; Dry Wells; Infiltration Trenches; Organic Filters; Regenerative Stormwater Conveyance; Sand Filters; and Stormwater Planters/Tree Boxes”

8. [8]State of Hawaii Department of Transportation, Highways DivisionHawaiiField-verifiedAppendix A, Page v

   “LID TREATMENT CONTROL BMPs: Vegetated Buffer Strip, Vegetated Swale, Enhanced Swale, Infiltration Trench, Infiltration Basin, Bioretention Facility, Permeable Pavement, Pocket Wetland, Rainwater Harvesting, Tree Box Filter”

9. [9]ConnecticutConnecticutCorpus patternpages 131-132

   “Manual Chapter 8 – Selection Considerations for Stormwater BMPs 124 Stormwater BMP Selection Factors Stormwater Management Suitability Table 8- 1 provides a summary comparison of the structural stormwater BMPs addressed in this Manual relative to their”

10. [10]MarylandMarylandCorpus patternpages 138-139

    “Chapter 4. Guide to BMP Selection and Location in Maryland .................. Stormwater Treatment 4.9 Table 4.3 BMP Selection - Stormwater Treatment Suitability CODE BMP List Rev Ability Cpv C”

11. [11]West VirginiaWest VirginiaCorpus patternpages 70-70

    “ct the most effective BMP(s) (Runoff Reduction Method Step 2), and evaluate the BMP selection’s performance in terms of managing the runoff volume from the 1-inch rainfall event and, when necessary, reducing the targeted pollutant load (Runoff Reduction”

12. [12]Rhode IslandRhode IslandCorpus patternpages 16-16

    “nt and response a primary concern? What soils and/or geologic conditions affect BMP selection? Are there special permitting requirements that may affect the stormwater design? Answers to these questions, and likely others, will help designers establish”

13. [13]GeorgiaGeorgiaCorpus patternpages 158-158

    “- vision scale BMPs, and that Homeowner BMPs should be considered separately. - BMP Selection: The selection of BMPs is often driven by the performance credit or compliance value; that is: what is required in order to achieve compliance with the local p”

14. [14]AlaskaAlaskaCorpus patternpages 180-181

    “e feasible. Site designers should also consider using BMPs in sequence (e.g., a treatment train approach). For example, a site designer could use a check dam, grass channel and wet pond in series to produce the required results, instead of relying on a we”

15. [15]MontanaMontanaCorpus patternpages 27-28

    “uirements (see the local jurisdiction’s engineering and development standards). BMP Selection and Sizing2.3 Each project has unique design goals and constraints. As such, there is no one-size-fits-all BMP which meets the Post-Construction Performance St”

16. [16]WashingtonWashingtonCorpus patternpages 164-164

    “l BMP selection process used l Pollutant removal expected from the selected BMPs l Technical basis supporting the performance claims for the selected BMPs l Assessment of how”

17. [17]Mid-America Regional Council / Kansas City Metro APWAMissouriCorpus patternpages 50-50

    “es 1 and 2 at the end of the section illustrate revised CN and LS calculations. Treatment trains may be included in the Mitigation Package to improve its performance and weighted VR. As discussed in Section 3, a treatment train is two or more BMPs in seri”

9 jurisdictions cited in this section (outline tags ~289 manuals; full atlas has ~299).

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