Spreadsheet: 0f0a0c0d-6ff4-4671-9e07-6a95aa4bd098
Sheet: Sheet1

BMP Group: | Structural | Unnamed: 2 | Unnamed: 3 | Unnamed: 4 | Unnamed: 5 | Unnamed: 6 | Unnamed: 7 | Unnamed: 8 | Unnamed: 9 | Unnamed: 10 | Unnamed: 11
 |  |  |  |  | BMP Effectiveness Range
BMP Type | Specific BMPs Included in Type | Contaminant/ Condition Class | Specific Contaminant/ Conditions Included in Class | Units | Low Positive Impacts | Conditions Favoring Low Positive Impacts | High Positive Impacts | Conditions Favoring High Positive Impacts | Default Positive Impact | Qualification | Certainty (H, M, L, or %)
Filters | Sand, gavel, compost, peat or other media systems: Flow through planters, [NAME], sand filters, vegetated filters | Metals | Dissolved Zinc | ug/L | 13 | Extreme local conditions, e.g. erosion; low O&M frequency; incorrect match of media to pollutants, e.g. inert media to dissolved pollutants | 4.8 | Low influent concentrations; high O&M frequency; correct match of media to pollutants, e.g. sorptive media to dissolved parameters | 8.3 | Use high values for sand, low values for compost, activated carbon, zeolite. | L
Stream Restoration | Vegetated stabilization of stream channel | Metals | Dissolved Zinc | ug/L | 13 | Assumed to be similar mechanisms to filter BMPs | 4.8 | Assumed to be similar mechanisms to filter BMPs | 8.3
Treatment Wetlands | Constructed wetland with forebay | Metals | Dissolved Zinc | ug/L | 17.4 |  | 10.6 |  | 13.8 |  | M
Swales | Broad, shallow, vegetated channels and infiltration swales | Metals | Dissolved Zinc | ug/L | 24 | High velocities, poor infiltration, low facility size to drainage area ratio | 17 | Low velocities, good infiltration, use of mulch (adsorption), presence of some clay fines for adsorption, high facility size to drainage area ratio | 20 |  | M
Wet Pond | Retention systems; spill containment ponds, wet extended detention ponds, wet ponds | Metals | Dissolved Zinc | ug/L | 42 | Extreme local conditions, e.g. erosion; low O&M frequency; small pond size relative to drainage area; flows short-circuiting pond length; extensive waterfowl use | 14 | Low influent concentrations; high O&M frequency; large pond size relative to drainage area; no short-circuiting of flows; limited waterfowl use | 27 |  | M
Centrifugal Separators | Swirl concentrators, vortex systems: CDS, Downstream Defenders, Stormceptors, [NAME] | Metals | Dissolved Zinc | ug/L | 41.8 | Extreme local conditions, e.g. erosion, especially with silt or clay soils; low O&M frequency, frequent bypassing | 26.7 | Low influent concentrations; high O&M frequency; limited bypassing | 33.8 |  | M
Sediment Manholes | In-line sedimentation manholes and vaults/boxes | Metals | Dissolved Zinc | ug/L | 50 | Extreme local conditions, e.g. erosion; low O&M frequency; relatively shallow depth below outlet | 26 | Low influent concentrations; high O&M frequency; adequate depth below outlet | 38 |  | L
Dry Pond | Detention systems: dry extended detention ponds | Metals | Dissolved Zinc | ug/L | 68.1 | Extreme local conditions, e.g. erosion; low O&M frequency; outlet structure designed for water quality | 47.8 | Low influent concentrations; high O&M frequency; poor design of outlet structure; poor condition of soil or vegetation | 58 |  | L
Filters | Sand, gavel, compost, peat or other media systems: Flow through planters, [NAME], sand filters, vegetated filters | Metals | Dissolved Zinc | ug/L | 66.2 | Soil media with high mineral content, galvanized metal on roof, use of moss control chemicals, larger storms | 7.7 | Soil media with high organic content, smaller storms | 24.3 | Default value is the average of the concentrations for both soil media for all events. | L
Flow-through Stormwater Planters | Flow-through planter Planter boxes (Filterra, New Columbia) | Metals | Dissolved Zinc | ug/L | 560 | high influent concentrations, low metal content in soil | 110 | Low influent concentrations, high metal content in soils | 240 | Based on synthetic stormwater for 1 facility (Inglewood, Maryland). Values not indicative of local, Portland conditions. | 0.1
Infiltration Stormwater Planters | Infiltration Planters | Metals | Dissolved Zinc | ug/L | 560 | high influent concentrations, low metal content in soil | 110 | Low influent concentrations, high metal content in soils | 240 | Based on synthetic stormwater for 1 facility (Inglewood, Maryland). Values not indicative of local, Portland conditions. | 0.1
Vegetated Infiltration Basins | Veg Infil Basins, Rain Gardens, Curb Extensions | Metals | Dissolved Zinc | ug/L | 560 | high influent concentrations, low metal content in soil | 110 | Low influent concentrations, high metal content in soils | 240 | Based on synthetic stormwater for 1 facility (Inglewood, Maryland). Values not indicative of local, Portland conditions. | 0.1
Treatment Wetlands | Constructed wetland with forebay | Nutrients | Total Phosphorus | mg/L | 0.18 | Vegetation decays in place. | 0.11 | Vegetation harvested. | 0.15 |  | M
Wet Pond | Retention systems; spill containment ponds, wet extended detention ponds, wet ponds | Nutrients | Total Phosphorus | mg/L | 0.28 | Extreme local conditions, e.g. erosion; low O&M frequency; small pond size relative to drainage area; flows short-circuiting pond length; extensive waterfowl use | 0.13 | Low influent concentrations; high O&M frequency; large pond size relative to drainage area; no short-circuiting of flows; limited waterfowl use | 0.19 |  | M
Swales | Broad, shallow, vegetated channels and infiltration swales | Nutrients | Total Phosphorus | mg/L | 0.26 | High velocities, high P content in native soils, low infiltration rates (or none), low facility size to drainage area ratio | 0.17 | Low velocities, low P content in native soils, good infiltration rates, high facility size to drainage area ratio | 0.21 | Values exceed TMDL for [NAME]; function of inflow concentration. | M
Centrifugal Separators | Swirl concentrators, vortex systems: CDS, Downstream Defenders, Stormceptors, [NAME] | Nutrients | Total Phosphorus | mg/L | 0.29 | Extreme local conditions, e.g. erosion, especially with silt or clay soils; low O&M frequency, frequent bypassing | 0.15 | Low influent concentrations; high O&M frequency; limited bypassing | 0.22 |  | M
Sediment Manholes | In-line sedimentation manholes and vaults/boxes | Nutrients | Total Phosphorus | mg/L | 0.29 | Extreme local conditions, e.g. erosion; low O&M frequency; relatively shallow depth below outlet | 0.15 | Low influent concentrations; high O&M frequency; adequate depth below outlet | 0.22 |  | M
Filters | Sand, gavel, compost, peat or other media systems: Flow through planters, [NAME], sand filters, vegetated filters | Nutrients | Total Phosphorus | mg/L | 0.3 | Extreme local conditions, e.g. erosion; low O&M frequency; incorrect match of media to pollutants, e.g. inert media to dissolved pollutants | 0.19 | Low influent concentrations; high O&M frequency; correct match of media to pollutants, e.g. sorptive media to dissolved parameters | 0.15 | High effluent concentrations with sand or compost.  Low effluent with zeolite, activated carbon. | L
Porous Pavement | Porous or block systems with underdrain | Nutrients | Total Phosphorus | mg/L | 0.3 | Residential land uses and where soils are well drained and site landscaping is not fertilized | 0.19 | Industrial land uses or where agricultural lands drain to the BMP | 0.15 | Assumes that porous pavement acts in the same way on any stormwater that is discharged as a sand or other mechanical filter and uses measured values for those filters (applies only to portion of stormwater discharged, not infiltrated) | L
Stream Restoration | Vegetated stabilization of stream channel | Nutrients | Total Phosphorus | ug/L | 0.3 | Assumed to be similar mechanisms to filter BMPs | 0.19 | Assumed to be similar mechanisms to filter BMPs | 0.24
Dry Pond | Detention systems: dry extended detention ponds | Nutrients | Total Phosphorus | mg/L | 0.39 | Extreme local conditions, e.g. erosion; low O&M frequency; outlet structure designed for water quality | 0.29 | Low influent concentrations; high O&M frequency; poor design of outlet structure; poor condition of soil or vegetation | 0.34 |  | M
Flow-through Stormwater Planters | Flow-through planter Planter boxes (Filterra, New Columbia) | Nutrients | Total Phosphorus | % Removal | 16 | Shallow soil (< 12"), high P levels in soil, flow-through system | 70 | Greater soil depth (> 24"), low P levels in soil, infiltration system | 50 | Assumes 18-24" of soil | L
Infiltration Stormwater Planters | Infiltration Planters | Nutrients | Total Phosphorus | % Removal | 50 | Shallow soil (< 12"), high P levels in soil, flow-through system | 87 | Greater soil depth (> 24"), low P levels in soil, infiltration system | 70 | Assumes 18-24" of soil | L
Vegetated Infiltration Basins | Veg Infil Basins, Rain Gardens, Curb Extensions | Nutrients | Total Phosphorus | % Removal | 50 | Shallow soil (< 12"), high P levels in soil, flow-through system | 87 | Greater soil depth (> 24"), low P levels in soil, infiltration system | 70 | Assumes 18-24" of soil | L
Filters | Sand, gavel, compost, peat or other media systems: Flow through planters, [NAME], sand filters, vegetated filters | Pathogens | E coli | Count /100 mls | 184 | Extreme local conditions, e.g. erosion; low O&M frequency; incorrect match of media to pollutants, e.g. inert media to dissolved pollutants | 28 | Low influent concentrations; high O&M frequency; correct match of media to pollutants, e.g. sorptive media to dissolved parameters | 91 | Older material develops a "slime" layer that enhances the removal of bacteria and viruses. | L
Stream Restoration | Vegetated stabilization of stream channel | Pathogens | E coli | Count /100 mls | 184 | Assumed to be similar mechanisms to filter BMPs | 28 | Assumed to be similar mechanisms to filter BMPs | 91
Porous Pavement | Porous or block systems with underdrain | Pathogens | E coli | Count /100 mls | 184 | Industrial areas | 28 | Commercial and residential land uses | 91 | Assumes that porous pavement acts in the same way on any stormwater that is discharged as a sand or other mechanical filter and uses measured values for those filters (applies only to portion of stormwater discharged, not infiltrated) | L
Treatment Wetlands | Constructed wetland with forebay | Pathogens | E coli | Count /100 mls | 1220 | Extensive waterfowl use | 146 | Limited waterfowl use | 499 |  | L
Wet Pond | Retention systems; spill containment ponds, wet extended detention ponds, wet ponds | Pathogens | E coli | Count /100 mls | 1220 | Extreme local conditions, e.g. erosion; low O&M frequency; small pond size relative to drainage area; flows short-circuiting pond length; extensive waterfowl use | 146 | Low influent concentrations; high O&M frequency; large pond size relative to drainage area; no short-circuiting of flows; limited waterfowl use | 499 |  | M
Dry Pond | Detention systems: dry extended detention ponds | Pathogens | E coli | Count /100 mls | 3584 | Extreme local conditions, e.g. erosion; low O&M frequency; outlet structure designed for water quality | 916 | Low influent concentrations; high O&M frequency; poor design of outlet structure; poor condition of soil or vegetation | 1922 |  | M
Swales | Broad, shallow, vegetated channels and infiltration swales | Pathogens | E coli | Count /100 mls | 3584 | Pet waste, birds | 916 |  | 1922 |  | M
Centrifugal Separators | Swirl concentrators, vortex systems: CDS, Downstream Defenders, Stormceptors, [NAME] | Pathogens | E coli | Count /100 mls | 22454 | Extreme local conditions, e.g. erosion, especially with silt or clay soils; low O&M frequency, frequent bypassing | 594 | Low influent concentrations; high O&M frequency; limited bypassing | 5587 |  | L
Sediment Manholes | In-line sedimentation manholes and vaults/boxes | Pathogens | E coli | Count /100 mls | 22454 | Extreme local conditions, e.g. erosion; low O&M frequency; relatively shallow depth below outlet | 594 | Low influent concentrations; high O&M frequency; adequate depth below outlet | 5587 |  | L
Centrifugal Separators | Swirl concentrators, vortex systems: CDS, Downstream Defenders, Stormceptors, [NAME] | Quantity | Flow Reduction | % |  | Extreme local conditions, e.g. erosion, especially with silt or clay soils; low O&M frequency, frequent bypassing |  | Low influent concentrations; high O&M frequency; limited bypassing | 0 |  | M
Filters | Sand, gavel, compost, peat or other media systems: Flow through planters, [NAME], sand filters, vegetated filters | Quantity | Flow Reduction | % | 0 | Extreme local conditions, e.g. erosion; low O&M frequency; incorrect match of media to pollutants, e.g. inert media to dissolved pollutants | 0 | Low influent concentrations; high O&M frequency; correct match of media to pollutants, e.g. sorptive media to dissolved parameters | 0 |  | L
Sediment Manholes | In-line sedimentation manholes and vaults/boxes | Quantity | Flow Reduction | % |  |  |  |  | 0 |  | H
Treatment Wetlands | Constructed wetland with forebay | Quantity | Flow Reduction | % | 0 |  | 5 |  | 0 |  | L
Wet Pond | Retention systems; spill containment ponds, wet extended detention ponds, wet ponds | Quantity | Flow Reduction | % | 3 | Extreme local conditions, e.g. erosion; low O&M frequency; small pond size relative to drainage area; flows short-circuiting pond length; extensive waterfowl use | 7 | Low influent concentrations; high O&M frequency; large pond size relative to drainage area; no short-circuiting of flows; limited waterfowl use | 5 |  | M
Stream Restoration | Vegetated stablization of stream channel | Quantity | Flow Reduction | % | 5 |  | 20 |  | 10 | Rationale similar to that for trees on transportation corridors.
Dry Pond | Detention systems: dry extended detention ponds | Quantity | Flow Reduction | % | 15 | Extreme local conditions, e.g. erosion; low O&M frequency; outlet structure designed for water quality | 30 | Low influent concentrations; high O&M frequency; poor design of outlet structure; poor condition of soil or vegetation | 23 |  | M
Swales | Broad, shallow, vegetated channels and infiltration swales | Quantity | Flow Reduction | % | 19 | High velocities, steep (> 5%) slope, poor infiltration, low facility size to drainage area ratio, large / intense storm events | 38 | Low velocities, gentle (<= 5%) slope, good infiltration, high facility size to drainage area ratio, small storm events | 29 |  | M
Swales | Street swales (rock galleries) | Quantity | Flow reduction | % | 10 | Poor soils or maintenace/installation | 100 | Operation as designed, greater age favoring formation of "slime" layer | 50
Filters | Ecoroofs | Quantity | Flow Reduction | % | 30 | Winter (Nov-Apr), soil media with high mineral content, high summer irrigation rates, thinner soil | 90 | Summer (May-Oct), soil media with more organic content, no summer irrigation, thicker soil | 60 | [NAME] (organic soil): 64% \ 56% \ 92% (year \ winter \ summer); [NAME] (mineral soil): 37% \ 33% \ 41% | M
Porous Pavement | Porous or block systems with underdrain | Quantity | Flow Reduction | % | 50 | Infrequent cleaning, poor construction techniques or materials, poor underlying soils, newer or concrete pavement | 100 | Cleaning using vacuum sweepers at least every 6 months, well drained soils, base drain materials at least 12 inches deep, limited non-street drainage, older or asphalt pavement | 77 |  | M
Flow-through Stormwater Planters | Flow-through planter Planter boxes (Filterra, New Columbia) | Quantity | Flow Reduction | % | 70 | Winter (Nov-Apr), soil media with few fines and organics, long and narrow (more wetted perimeter), thinner soil | 100 | Summer (May-Oct), soil media with fines and organics, short and wide (less wetted perimeter), thicker soil | 85 |  | M
Infiltration Stormwater Planters | Infiltration Planters | Quantity | Flow Reduction | % | 70 | Winter (Nov-Apr), CSO Design Storms, poorly draining native soils | 100 | Summer (May-Oct), Water Qaulity Design Storm, fast draining native soils | 85 | Values for eastside application; no data available on west side but they may prove better than anticipated | M
Vegetated Infiltration Basins | Veg Infil Basins, Rain Gardens, Curb Extensions | Quantity | Flow Reduction | % | 85 | Winter (Nov-Apr), CSO Design Storms, poorly draining native soils | 100 | Summer (May-Oct), Water Qaulity Design Storm, fast draining native soils | 95 | Values for eastside application; no data available on west side but they may prove better than anticipated | M
Soakage Trenches | Surface or subsurface trenches: drywells, sumps, infiltration basins, infiltration trenches, soakage trenches | Quantity | Flow Reduction | % | 80 | Poor underlying soils and or sloped conditions, potentially undersized facilities, but mostly meeting design specifications | 100 | Well drained soils and flat conditions. Operates as designed and is regularly inspected to assure function. | 100
Flow-through Stormwater Planters | Flow-through planter Planter boxes (Filterra, New Columbia) | Quantity | Volume Reduction | % | 15 | Winter (Nov-Apr), soil media with few fines and organics, long and narrow (more wetted perimeter), thinner soil | 40 | Summer (May-Oct), soil media with fines and organics, short and wide (less wetted perimeter), thicker soil | 25 |  | M
Infiltration Stormwater Planters | Infiltration Planters | Quantity | Volume Reduction | % | 50 | Winter (Nov-Apr), CSO Design Storms, poorly draining native soils | 100 | Summer (May-Oct), Water Qaulity Design Storm, fast draining native soils | 70 | Values for eastside application; no data available on west side but they may prove better than anticipated | M
Vegetated Infiltration Basins | Veg Infil Basins, Rain Gardens, Curb Extensions | Quantity | Volume Reduction | % | 50 | Winter (Nov-Apr), CSO Design Storms, poorly draining native soils | 100 | Summer (May-Oct), Water Qaulity Design Storm, fast draining native soils | 80 | Values for eastside application; no data available on west side but they may prove better than anticipated | M
Wet Pond | Retention systems; spill containment ponds, wet extended detention ponds, wet ponds | Sediment | TSS | mg/L | 26.2 | Extreme local conditions, e.g. erosion; low O&M frequency; small pond size relative to drainage area; flows short-circuiting pond length; extensive waterfowl use | 17.1 | Low influent concentrations; high O&M frequency; large pond size relative to drainage area; no short-circuiting of flows; limited waterfowl use | 21.5 |  | M
Swales | Broad, shallow, vegetated channels and infiltration swales | Sediment | TSS | mg/L | 29 | Channelized flow, poor infiltration rates, steep (> 5%), > 3:1 side slopes, sparsely vegetated or grass too tall (little or no mowing), high intensity storm events | 19 | Non-channelized flow, good infiltration rates, gentle slope (<= 5%), <= 3:1 side slopes, heavily vegetated, routinely mowed resulting in high stem density, check dams, low intensity storm events | 24 |  | M
Treatment Wetlands | Constructed wetland with forebay | Sediment | TSS | mg/L | 34.3 | Vegetation in poor condition, fluctuating water levels, wetland older than five years. | 17.3 | Vegetation in good condition, constant water levels, wetland younger than five years. | 24.7 |  | M
Filters | Sand, gavel, compost, peat or other media systems: Flow through planters, [NAME], sand filters, vegetated filters | Sediment | TSS | mg/L | 52.7 | Extreme local conditions, e.g. erosion; low O&M frequency; incorrect match of media to pollutants, e.g. inert media to dissolved pollutants | 32.9 | Low influent concentrations; high O&M frequency; correct match of media to pollutants, e.g. sorptive media to dissolved parameters | 42 | Removal rates are heavily dependent on filter material and pollutant form.  Inert media, such as sand, removes only particulates and associated pollutants.  Sorptive media (compost, activated carbon, zeolite) can remove both particulates and dissolved substances. | L
Stream Restoration | Vegetated stabilization of stream channel | Sediment | TSS | mg/L | 52.7 | Assumed to be similar mechanisms to filter BMPs | 32.9 | Assumed to be similar mechanisms to filter BMPs | 42
Porous Pavement | Porous or block systems with underdrain | Sediment | TSS | mg/L | 52.7 | Residential land uses and where sweeping occurs frequently | 32.9 | Construction areas or bare soils drain to the streets (especially clay soils), industrial land uses | 42 | Assumes that porous pavement acts in the same way on any stormwater that is discharged as a sand or other mechanical filter and uses measured values for those filters (applies only to portion of stormwater discharged, not infiltrated) | L
Dry Pond | Detention systems: dry extended detention ponds | Sediment | TSS | mg/L | 55 | Extreme local conditions, e.g. erosion; low O&M frequency; outlet structure designed for water quality | 34.9 | Low influent concentrations; high O&M frequency; poor design of outlet structure; poor condition of soil or vegetation | 44.4 |  | M
Sediment Manholes | In-line sedimentation manholes and vaults/boxes | Sediment | TSS | mg/L | 90 | Extreme local conditions, e.g. erosion; low O&M frequency; relatively shallow depth below outlet | 45 | Low influent concentrations; high O&M frequency; adequate depth below outlet | 66 |  | L
Flow-through Stormwater Planters | Flow-through planter Planter boxes (Filterra, New Columbia) | Sediment | TSS | % Removal | 81 | Faster draining soils (gravels & sands) | 90 | Slower draining soils (silts & clays) | 85 |  | M
Infiltration Stormwater Planters | Infiltration Planters | Sediment | TSS | % Removal | 81 | Faster draining soils (gravels & sands) | 90 | Slower draining soils (silts & clays) | 85 |  | M
Vegetated Infiltration Basins | Veg Infil Basins, Rain Gardens, Curb Extensions | Sediment | TSS | % Removal | 81 | Faster draining soils (gravels & sands) | 90 | Slower draining soils (silts & clays) | 85 |  | M
Centrifugal Separators | Swirl concentrators, vortex systems: CDS, Downstream Defenders, Stormceptors, [NAME] | Sediment | TSS | mg/L | 145 | Extreme local conditions, e.g. erosion, especially with silt or clay soils; low O&M frequency, frequent bypassing | 85 | Low influent concentrations; high O&M frequency; limited bypassing | 115 |  | M