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<td>In-line, after a manhole with a high flow weir. System is ideal under parking lots and roadways and areas with tight footprints [https://www.swbmp.vwrrc.vt.edu/wp-content/uploads/2017/10/Filter_Application_StormTech-Isolator-Row_Item-1.pdf]</td> | <td>In-line, after a manhole with a high flow weir. System is ideal under parking lots and roadways and areas with tight footprints [https://www.swbmp.vwrrc.vt.edu/wp-content/uploads/2017/10/Filter_Application_StormTech-Isolator-Row_Item-1.pdf]</td> | ||
<td>Ideally highly infiltrative to achieve volume reduction [https://www.swbmp.vwrrc.vt.edu/wp-content/uploads/2017/10/Filter_Application_StormTech-Isolator-Row_Item-1.pdf]</td> | <td>Ideally highly infiltrative to achieve volume reduction [https://www.swbmp.vwrrc.vt.edu/wp-content/uploads/2017/10/Filter_Application_StormTech-Isolator-Row_Item-1.pdf]</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>[https://www.prinsco.com/wp-content/uploads/2015/03/HydroStor-HS180-Sediment-Row-A-D-7-202.pdf Prinsco HydroStor Sediment Row]</td> | ||
+ | <td>Varies widely, units may be placed in parallel and series to accommodate</td> | ||
+ | <td>Rate varies per HydroStor chamber model. </td> | ||
+ | <td>Max length of row = 175 ft, but multiple rows may be used. Dimensions vary per HydroStor chamber model. </td> | ||
+ | <td>Two layers of woven geotextile, HydroStor chamber, non-woven fabric if model has perforated side walls, gravel</td> | ||
+ | <td>In-line, after a manhole with a high flow weir. System is ideal under parking lots, roadways, and areas with tight footprints. </td> | ||
+ | <td>Ideally highly infiltrative to achieve volume reduction</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Settling chamber/vault </td> | <td>Settling chamber/vault </td> | ||
− | <td>Can accommodate | + | <td>Can be sized to accommodate drainage area of downstream BMP [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_filtration#:~:text=link%20here.-,Major%20design%20elements,-Physical%20feasibility%20initial]</td> |
− | <td>Exit velocity to surface media filters should be non-erosive [https://stormwater.pca.state.mn.us/index.php?title= | + | <td>Exit velocity to surface media filters should be non-erosive [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_filtration#:~:text=in%20Karst%20terrain.-,Conveyance,-%5Bedit%5D]</td> |
<td>Recommended length to width ratio of 2:1</td> | <td>Recommended length to width ratio of 2:1</td> | ||
<td></td> | <td></td> | ||
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<td>Hydro Dry Screen</td> | <td>Hydro Dry Screen</td> | ||
<td></td> | <td></td> | ||
− | <td>Max Flow: 29-162 cfs, Treatment Flow: 11-80 cfs , 80% TSS removal: 1.8-16 cfs [https://www.hydro-int.com/sites/default/files/ | + | <td>Max Flow: 29-162 cfs, Treatment Flow: 11-80 cfs , 80% TSS removal: 1.8-16 cfs [https://www.hydro-int.com/sites/default/files/hydro_dryscreen_technical_abstract_0.pdf]</td> |
− | <td>Five models: 4x8 ft to 12x20 ft ([https://www.hydro-int.com/sites/default/files/ | + | <td>Five models: 4x8 ft to 12x20 ft ([https://www.hydro-int.com/sites/default/files/hydro_dryscreen_technical_abstract_0.pdf])</td> |
<td></td> | <td></td> | ||
− | <td>New construction or redevelopment sites, retrofit of storm drain lines, shallow installations with high groundwater or bedrock, installations requiring low headloss [https://www.hydro-int.com/sites/default/files/ | + | <td>New construction or redevelopment sites, retrofit of storm drain lines, shallow installations with high groundwater or bedrock, installations requiring low headloss [https://www.hydro-int.com/sites/default/files/hydro_dryscreen_technical_abstract_0.pdf]</td> |
<td></td> | <td></td> | ||
</tr> | </tr> | ||
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<td>Suntree Nutrient Seprating Baffle Box (NSBB)</td> | <td>Suntree Nutrient Seprating Baffle Box (NSBB)</td> | ||
<td></td> | <td></td> | ||
− | <td>Maximum Treatment Flow Rate: 2-45 cfs [https:// | + | <td>Maximum Treatment Flow Rate: 2-45 cfs [https://oldcastleinfrastructure.com/brands/nutrient-separating-baffle-box-nsbb/]</td> |
− | <td>4 ft x 2 ft x 2.7 ft - 24 ft x 12 ft x 9 ft [https:// | + | <td>4 ft x 2 ft x 2.7 ft - 24 ft x 12 ft x 9 ft [https://oldcastleinfrastructure.com/brands/nutrient-separating-baffle-box-nsbb/]</td> |
<td></td> | <td></td> | ||
− | <td>Online [https:// | + | <td>Online [https://oldcastleinfrastructure.com/brands/nutrient-separating-baffle-box-nsbb/]</td> |
<td></td> | <td></td> | ||
</tr> | </tr> | ||
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<td>Environment 21 StormPro</td> | <td>Environment 21 StormPro</td> | ||
<td></td> | <td></td> | ||
− | <td>0.5-8.6 cfs. Max loading for all models = 10.8 gpm/sq ft [ | + | <td>0.5-8.6 cfs. Max loading for all models = 10.8 gpm/sq ft [Environment 21 StormPro]; [http://www.njcat.org/uploads/newDocs/StormProVerificationReportFinal.pdf]</td> |
<td>11 models. The 5 models in the StormPro V series range from 4 ft x 8 ft x 2.5+ ft to 10 ft x 20 ft x 5+ ft [https://fortress.wa.gov/ecy/wqpds/pds/newtech/use_designations/STORMPROenvironment21PULD.pdf]; [http://www.njcat.org/uploads/newDocs/StormProVerificationReportFinal.pdf]</td> | <td>11 models. The 5 models in the StormPro V series range from 4 ft x 8 ft x 2.5+ ft to 10 ft x 20 ft x 5+ ft [https://fortress.wa.gov/ecy/wqpds/pds/newtech/use_designations/STORMPROenvironment21PULD.pdf]; [http://www.njcat.org/uploads/newDocs/StormProVerificationReportFinal.pdf]</td> | ||
<td>Baffle wall: precast concrete or other approved rigid materials, Bypass pipe: rigid plastic [http://www.njcat.org/uploads/newDocs/StormProVerificationReportFinal.pdf]</td> | <td>Baffle wall: precast concrete or other approved rigid materials, Bypass pipe: rigid plastic [http://www.njcat.org/uploads/newDocs/StormProVerificationReportFinal.pdf]</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td>BaySeparator by BaySaver | + | <td>BaySeparator by BaySaver</td> |
<td>1.2-8 acres impervious area [http://www.virginiadot.org/business/resources/LocDes/BMP_Design-Manual/Chapter_16_Hydrodynamic_Separators.pdf] | <td>1.2-8 acres impervious area [http://www.virginiadot.org/business/resources/LocDes/BMP_Design-Manual/Chapter_16_Hydrodynamic_Separators.pdf] | ||
</td> | </td> | ||
− | <td>Treats maximum of 22 cfs [https:// | + | <td>Treats maximum of 22 cfs [https://www.adspipe.com/water-management-solutions/water-quality/separators/bayseparator-stormwater-treatment-system]</td> |
− | <td>5 standard sizes: manhole diameter 48-120 inches, 6-8 ft deep [https:// | + | <td>5 standard sizes: manhole diameter 48-120 inches, 6-8 ft deep [https://www.adspipe.com/water-management-solutions/water-quality/separators/bayseparator-stormwater-treatment-system]</td> |
− | <td>Concrete, HDPE, polyethylene [https:// | + | <td>Concrete, HDPE, polyethylene [https://www.adspipe.com/water-management-solutions/water-quality/separators/bayseparator-stormwater-treatment-system]</td> |
<td></td> | <td></td> | ||
<td></td> | <td></td> | ||
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<td>Stainless steel [https://upstreamtechnologies.us/docs/Upstream_SAFL_Brochure.pdf]</td> | <td>Stainless steel [https://upstreamtechnologies.us/docs/Upstream_SAFL_Brochure.pdf]</td> | ||
<td>New or existing sump manhole [https://www.dnr.state.mn.us/water_access/bmp/sump_manhole_with_safl_baffle_bmp.html]</td> | <td>New or existing sump manhole [https://www.dnr.state.mn.us/water_access/bmp/sump_manhole_with_safl_baffle_bmp.html]</td> | ||
+ | <td></td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>[https://www.prinsco.com/wp-content/uploads/2021/03/ThePreserver%E2%84%A2_Standard-Detail-Dissipator-Skimmer.pdf Prinsco Preserver Dissipator]</td> | ||
+ | <td>Total impervious of <15 acres</td> | ||
+ | <td>Horizontal flow must be at least 3x flow from above</td> | ||
+ | <td>3' min. structure diameter, no max. structure dimensions, min. sump depth is 1.5x outlet pipe dia.</td> | ||
+ | <td>Stainless steel & HDPE</td> | ||
+ | <td>Inline. New or existing sump manhole. All parts retrofittable through 24" opening.</td> | ||
<td></td> | <td></td> | ||
</tr> | </tr> | ||
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<td>Forebay/pre-settling </td> | <td>Forebay/pre-settling </td> | ||
<td>10 acres minimum to wet pond, portion feeding into forebay depends on number of tributaries to pond [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_stormwater_ponds]</td> | <td>10 acres minimum to wet pond, portion feeding into forebay depends on number of tributaries to pond [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_stormwater_ponds]</td> | ||
− | <td>~0.2 cfs/acre drained | + | <td>~0.2 cfs/acre drained</td> |
− | <td>Volume > 10% of water quality volume, depth = 3-6 ft, surface area = 10% of pond permanent pool surface area or 0.1% of drainage area, Tear shaped (inlet at narrow end) w/ avg length to width ratio = 3:1, side slope = 3:1 or flatter | + | <td>Volume > 10% of water quality volume, depth = 3-6 ft, surface area = 10% of pond permanent pool surface area or 0.1% of drainage area, Tear shaped (inlet at narrow end) w/ avg length to width ratio = 3:1, side slope = 3:1 or flatter; [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_stormwater_ponds]</td> |
<td>Bottom of forebay hardened using concrete, asphalt, or grouted riprap [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_stormwater_ponds]</td> | <td>Bottom of forebay hardened using concrete, asphalt, or grouted riprap [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_stormwater_ponds]</td> | ||
<td>On-line, at each inlet contributing greater than 10% of the total design storm inflow to pond [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_stormwater_ponds]</td> | <td>On-line, at each inlet contributing greater than 10% of the total design storm inflow to pond [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_stormwater_ponds]</td> | ||
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</tr> | </tr> | ||
</table> | </table> | ||
+ | |||
+ | <noinclude> | ||
+ | [[Category:Level 3 - Best management practices/Pretreatment practices/Tables]] | ||
+ | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Pretreatment]] | ||
+ | </noinclude> |
Above ground and below grade storage and settling - system design information
Link to this table
Device | Drainage area | Entrance/exit velocity | Dimensions | Materials | Layout Recommendations (physical location, off-line placement) | Soils |
---|---|---|---|---|---|---|
Pretreatment row on underground storage/filtration | Varies widely, units may be placed in parallel and series to accommodate | Varies. Limiting factor is site footprint available. | Rigid chamber, gravel | In-line, ideal under parking lots and areas with tight footprints | Ideally highly infiltrative to achieve volume reduction | |
StormTech Isolator Row | Varies widely, units may be placed in parallel and series to accommodate | See flow Table 2 | Max length of row = 175 ft, but multiple rows may be used, see dimensions table for models SC-310, SC-310-3, SC-780, MC-3500 and MC-4500 [1] | Two layers of woven geotextile, StormTech chamber, non-woven fabric if model has perforated side walls, gravel [2] | In-line, after a manhole with a high flow weir. System is ideal under parking lots and roadways and areas with tight footprints [3] | Ideally highly infiltrative to achieve volume reduction [4] |
Prinsco HydroStor Sediment Row | Varies widely, units may be placed in parallel and series to accommodate | Rate varies per HydroStor chamber model. | Max length of row = 175 ft, but multiple rows may be used. Dimensions vary per HydroStor chamber model. | Two layers of woven geotextile, HydroStor chamber, non-woven fabric if model has perforated side walls, gravel | In-line, after a manhole with a high flow weir. System is ideal under parking lots, roadways, and areas with tight footprints. | Ideally highly infiltrative to achieve volume reduction |
Settling chamber/vault | Can be sized to accommodate drainage area of downstream BMP [5] | Exit velocity to surface media filters should be non-erosive [6] | Recommended length to width ratio of 2:1 | |||
Oil/water/grit separators | <1 acre impervious cover [7] | 1-3 ft/min or less [8] | Total wet storage = 400 cf per acre of contributing imp area, depth of permanent pool >4 ft [9] | Reinforced concrete | Off-line, ideal in urban areas with small lots and for retrofits [10] | No soil or terrain restrictions [11] |
Hydro Dry Screen | Max Flow: 29-162 cfs, Treatment Flow: 11-80 cfs , 80% TSS removal: 1.8-16 cfs [12] | Five models: 4x8 ft to 12x20 ft ([13]) | New construction or redevelopment sites, retrofit of storm drain lines, shallow installations with high groundwater or bedrock, installations requiring low headloss [14] | |||
Suntree Nutrient Seprating Baffle Box (NSBB) | Maximum Treatment Flow Rate: 2-45 cfs [15] | 4 ft x 2 ft x 2.7 ft - 24 ft x 12 ft x 9 ft [16] | Online [17] | |||
Manhole Baffle Box | 1-100 acres [18] | Typically 10-15 ft long x 6-8 ft high x 2 ft wider than pipe [19] | Concrete, fiberglass [20] | In-line or at the end of storm pipes, ideal for retrofitting existing pipes [21] | ||
Environment 21 StormPro | 0.5-8.6 cfs. Max loading for all models = 10.8 gpm/sq ft [Environment 21 StormPro]; [22] | 11 models. The 5 models in the StormPro V series range from 4 ft x 8 ft x 2.5+ ft to 10 ft x 20 ft x 5+ ft [23]; [24] | Baffle wall: precast concrete or other approved rigid materials, Bypass pipe: rigid plastic [25] | |||
BaySeparator by BaySaver | 1.2-8 acres impervious area [26] | Treats maximum of 22 cfs [27] | 5 standard sizes: manhole diameter 48-120 inches, 6-8 ft deep [28] | Concrete, HDPE, polyethylene [29] | ||
Sump Manhole with SAFL Baffle | <10 acres [30] | Horizontal flow must be at least 3x flow from above [31] | Can be installed in sump structures w/ diameters of 3-10 ft and depths >= 3 ft [32] | Stainless steel [33] | New or existing sump manhole [34] | |
Prinsco Preserver Dissipator | Total impervious of <15 acres | Horizontal flow must be at least 3x flow from above | 3' min. structure diameter, no max. structure dimensions, min. sump depth is 1.5x outlet pipe dia. | Stainless steel & HDPE | Inline. New or existing sump manhole. All parts retrofittable through 24" opening. | |
Deep sump catch basin | <0.25 acre impervious area | < 3 cfs [35] | Diameter of outlet pipe = D: diameter of catch basin = 4D, sump depth >= 4D, top of outlet pipe 1.5 D below bottom of inlet. Minimum sump depth = 4 ft. [36] | Off-line system. May not be used in place of oil/grit separator or sand filter in areas with potential to generate high concentrations of oil and grease such as high-use parking lots, gas stations, and vehicle storage areas [37] | ||
Forebay/pre-settling | 10 acres minimum to wet pond, portion feeding into forebay depends on number of tributaries to pond [38] | ~0.2 cfs/acre drained | Volume > 10% of water quality volume, depth = 3-6 ft, surface area = 10% of pond permanent pool surface area or 0.1% of drainage area, Tear shaped (inlet at narrow end) w/ avg length to width ratio = 3:1, side slope = 3:1 or flatter; [39] | Bottom of forebay hardened using concrete, asphalt, or grouted riprap [40] | On-line, at each inlet contributing greater than 10% of the total design storm inflow to pond [41] | Underlying soils should be hydrologic group C or D, liner may be needed for A or B group soils. [42] |
This page was last edited on 23 January 2024, at 13:27.