m |
m |
||
Line 19: | Line 19: | ||
<td></td> | <td></td> | ||
<td></td> | <td></td> | ||
− | <td>Periodically remove sediment by back-flushing water and vacuuming manhole sump</td> | + | <td>Periodically remove sediment by back-flushing water and vacuuming manhole sump [https://www.stormtech.com/download_files/pdf/manual_iso_row.pdf]</td> |
<td></td> | <td></td> | ||
<td>Vacuum truck</td> | <td>Vacuum truck</td> | ||
Line 26: | Line 26: | ||
<td>StormTech Isolator Row</td> | <td>StormTech Isolator Row</td> | ||
<td>Installation instructions [https://www.stormtech.com/download_files/pdf/manual_installation_instructions_310740780.pdf available here].</td> | <td>Installation instructions [https://www.stormtech.com/download_files/pdf/manual_installation_instructions_310740780.pdf available here].</td> | ||
− | <td>At least every 6 months for first year of operation, then varies by location</td> | + | <td>At least every 6 months for first year of operation, then varies by location [https://www.stormtech.com/download_files/pdf/manual_iso_row.pdf]</td> |
<td>[https://www.stormtech.com/download_files/pdf/manual_iso_row.pdf Step by step maintenance procedures]</td> | <td>[https://www.stormtech.com/download_files/pdf/manual_iso_row.pdf Step by step maintenance procedures]</td> | ||
<td></td> | <td></td> | ||
− | <td>Clean-out when average depth of sediment exceeds 3 inches</td> | + | <td>Clean-out when average depth of sediment exceeds 3 inches [https://www.stormtech.com/download_files/pdf/manual_iso_row.pdf]</td> |
<td></td> | <td></td> | ||
− | <td>Vacuum/JetVac combination vehicle</td> | + | <td>Vacuum/JetVac combination vehicle [https://www.stormtech.com/download_files/pdf/manual_iso_row.pdf]</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
Line 39: | Line 39: | ||
<td></td> | <td></td> | ||
<td></td> | <td></td> | ||
− | <td>Remove sediment once depth reaches 6 inches or more</td> | + | <td>Remove sediment once depth reaches 6 inches or more [https://your.kingcounty.gov/dnrp/library/water-and-land/stormwater/Drainage-Maintenace-Standards-Commercial-Multifamily-Drainage-Facilities/09_ComDrainBook.pdf]</td> |
<td></td> | <td></td> | ||
<td></td> | <td></td> | ||
Line 46: | Line 46: | ||
<td>Oil/water/grit separators</td> | <td>Oil/water/grit separators</td> | ||
<td></td> | <td></td> | ||
− | <td>After every major storm but at least once per month</td> | + | <td>After every major storm but at least once per month [http://prj.geosyntec.com/npsmanual/oilgritseparators.aspx]</td> |
<td></td> | <td></td> | ||
<td></td> | <td></td> | ||
− | <td>Clean out at least twice per year</td> | + | <td>Clean out at least twice per year [http://prj.geosyntec.com/npsmanual/oilgritseparators.aspx]</td> |
<td></td> | <td></td> | ||
<td></td> | <td></td> | ||
Line 56: | Line 56: | ||
<td>Hydro Dry Screen</td> | <td>Hydro Dry Screen</td> | ||
<td></td> | <td></td> | ||
− | <td>Every 3-6 months during first year, then site specific</td> | + | <td>Every 3-6 months during first year, then site specific [https://www.hydro-int.com/sites/default/files/hds_om_manual_a1604.pdf]</td> |
− | <td>[https://www.hydro-int.com/sites/default/files/hds_om_manual_a1604.pdf Maintenance and inspection checklist]</td> | + | <td>[https://www.hydro-int.com/sites/default/files/hds_om_manual_a1604.pdf Maintenance and inspection checklist] [https://www.hydro-int.com/sites/default/files/hds_om_manual_a1604.pdf]</td> |
<td></td> | <td></td> | ||
− | <td>Remove sediment once depth exceeds maximum clean-out depth</td> | + | <td>Remove sediment once depth exceeds maximum clean-out depth [https://www.hydro-int.com/sites/default/files/hds_om_manual_a1604.pdf]</td> |
<td></td> | <td></td> | ||
<td>Vacuum truck</td> | <td>Vacuum truck</td> | ||
Line 66: | Line 66: | ||
<td>Suntree Nutrient Separating Baffle Box (NSBB)</td> | <td>Suntree Nutrient Separating Baffle Box (NSBB)</td> | ||
<td></td> | <td></td> | ||
− | <td>After each runoff event initially, then at least quarterly. Local and State regulation may require every 90 days</td> | + | <td>After each runoff event initially, then at least quarterly. Local and State regulation may require every 90 days [https://www.suntreetech.com/uploads/1/1/4/5/114586811/nsbb_operations_manual_v1.0.pdf]</td> |
− | <td>[https://www.suntreetech.com/uploads/1/1/4/5/114586811/nsbb_operations_manual_v1.0.pdf Inspection and maintenance checklist]</td> | + | <td>[https://www.suntreetech.com/uploads/1/1/4/5/114586811/nsbb_operations_manual_v1.0.pdf Inspection and maintenance checklist]; [https://www.suntreetech.com/uploads/1/1/4/5/114586811/nsbb_operations_manual_v1.0.pdf]</td> |
<td></td> | <td></td> | ||
− | <td>Vacuum out sediment chambers when sediment accumulation exceeds 50% storage volume</td> | + | <td>Vacuum out sediment chambers when sediment accumulation exceeds 50% storage volume [https://www.suntreetech.com/uploads/1/1/4/5/114586811/nsbb_operations_manual_v1.0.pdf]</td> |
<td></td> | <td></td> | ||
<td>Vacuum truck</td> | <td>Vacuum truck</td> | ||
Line 76: | Line 76: | ||
<td>Manhole Baffle Box</td> | <td>Manhole Baffle Box</td> | ||
<td></td> | <td></td> | ||
− | <td>Frequently for first two years following installation, then site specific</td> | + | <td>Frequently for first two years following installation, then site specific [https://stormwater.pca.state.mn.us/index.php?title=Flow-through_structures_for_pre-treatment]</td> |
<td></td> | <td></td> | ||
<td></td> | <td></td> | ||
− | <td>Fully cleaned at least once per year</td> | + | <td>Fully cleaned at least once per year [https://stormwater.pca.state.mn.us/index.php?title=Flow-through_structures_for_pre-treatment]</td> |
<td></td> | <td></td> | ||
− | <td>Vacuum truck; One half day; Average cost $450</td> | + | <td>Vacuum truck; One half day; Average cost $450 [https://stormwater.pca.state.mn.us/index.php?title=Flow-through_structures_for_pre-treatment]</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Environment 21 StormPro</td> | <td>Environment 21 StormPro</td> | ||
<td></td> | <td></td> | ||
− | <td>At least quarterly until a more accurate schedule can be determined</td> | + | <td>At least quarterly until a more accurate schedule can be determined [https://www.njstormwater.org/pdf/StormPro_Certification_20150120.pdf]</td> |
<td>[https://www.njstormwater.org/pdf/StormPro_Certification_20150120.pdf Maintenance data sheet]</td> | <td>[https://www.njstormwater.org/pdf/StormPro_Certification_20150120.pdf Maintenance data sheet]</td> | ||
<td></td> | <td></td> | ||
− | <td>Sediment should be removed when sediment depth in first chamber is 50% of design sediment storage depth or at least once per year</td> | + | <td>Sediment should be removed when sediment depth in first chamber is 50% of design sediment storage depth or at least once per year [https://www.njstormwater.org/pdf/StormPro_Certification_20150120.pdf]</td> |
<td></td> | <td></td> | ||
− | <td>Truck-mounted sewer and catch basin cleaner with vacuum pump</td> | + | <td>Truck-mounted sewer and catch basin cleaner with vacuum pump [https://www.njstormwater.org/pdf/StormPro_Certification_20150120.pdf]</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>BaySeparator by BaySaver </td> | <td>BaySeparator by BaySaver </td> | ||
<td></td> | <td></td> | ||
− | <td>At least every 6 months initially, then site specific</td> | + | <td>At least every 6 months initially, then site specific [https://baysaver.com/wp-content/uploads/2018/04/BaySeparator-Technical-and-Design-Manual.pdf]</td> |
<td>[https://baysaver.com/wp-content/uploads/2018/04/BaySeparator-Technical-and-Design-Manual.pdf Maintenance instructions]</td> | <td>[https://baysaver.com/wp-content/uploads/2018/04/BaySeparator-Technical-and-Design-Manual.pdf Maintenance instructions]</td> | ||
<td></td> | <td></td> | ||
− | <td>Cleaning recommended every 12-36 months or when 2 feet of sediment have accumulated</td> | + | <td>Cleaning recommended every 12-36 months or when 2 feet of sediment have accumulated [https://baysaver.com/wp-content/uploads/2018/04/BaySeparator-Technical-and-Design-Manual.pdf]</td> |
<td></td> | <td></td> | ||
− | <td>Vacuum truck</td> | + | <td>Vacuum truck [https://www.ads-pipe.com/products/water-quality/barracuda-storm-water-separator]</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Sump Manhole with SAFL Baffle</td> | <td>Sump Manhole with SAFL Baffle</td> | ||
− | <td>45 minute installation</td> | + | <td>45 minute installation [https://upstreamtechnologies.us/docs/Upstream_SAFL_Brochure.pdf]</td> |
<td>Three times per year for first two years</td> | <td>Three times per year for first two years</td> | ||
<td></td> | <td></td> | ||
Line 111: | Line 111: | ||
<td>Sediment removed before it reaches the bottom of the SAFL baffle</td> | <td>Sediment removed before it reaches the bottom of the SAFL baffle</td> | ||
<td></td> | <td></td> | ||
− | <td>Vacuum truck</td> | + | <td>Vacuum truck [https://upstreamtechnologies.us/docs/SAFL-Baffle-Design-Guide.pdf]</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Deep sump catch basin</td> | <td>Deep sump catch basin</td> | ||
<td></td> | <td></td> | ||
− | <td>Four times per year and at the end of foliage and snow- removal seasons</td> | + | <td>Four times per year and at the end of foliage and snow- removal seasons [http://prj.geosyntec.com/npsmanual/deepsumpcatchbasin.aspx]</td> |
<td></td> | <td></td> | ||
<td></td> | <td></td> | ||
− | <td>Four times per year or when deposit depth is greater than ½ depth from bottom of invert to lowest pipe</td> | + | <td>Four times per year or when deposit depth is greater than ½ depth from bottom of invert to lowest pipe [http://prj.geosyntec.com/npsmanual/deepsumpcatchbasin.aspx]</td> |
<td>Hood required</td> | <td>Hood required</td> | ||
− | <td>Vacuum truck or clamshell bucket</td> | + | <td>Vacuum truck or clamshell bucket [http://prj.geosyntec.com/npsmanual/deepsumpcatchbasin.aspx]</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Forebay/pre-settling basin</td> | <td>Forebay/pre-settling basin</td> | ||
<td>Hard floor (concrete or grouted stone) allows definition of bottom and ease of maintenance. Provide appropriate stabilized maintenance access for heavier equipment at no more than 2% cross slope and no more than 10% longitudinal slope</td> | <td>Hard floor (concrete or grouted stone) allows definition of bottom and ease of maintenance. Provide appropriate stabilized maintenance access for heavier equipment at no more than 2% cross slope and no more than 10% longitudinal slope</td> | ||
− | <td>Monthly</td> | + | <td>Monthly [http://prj.geosyntec.com/npsmanual/sedimentforebays.aspx]</td> |
<td></td> | <td></td> | ||
<td></td> | <td></td> | ||
− | <td>Four times per year or when sediment depth is >3 ft. A hard bottom such as concrete facilitates removal, during design ensure forebay is vehicle accessible</td> | + | <td>Four times per year or when sediment depth is >3 ft. A hard bottom such as concrete facilitates removal, during design ensure forebay is vehicle accessible [http://prj.geosyntec.com/npsmanual/sedimentforebays.aspx]; [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_stormwater_ponds]</td> |
− | <td>Forebay should be designed to withstand 2-yr and 10-yr velocities without scouring</td> | + | <td>Forebay should be designed to withstand 2-yr and 10-yr velocities without scouring [http://prj.geosyntec.com/npsmanual/sedimentforebays.aspx]</td> |
<td>Vacuum truck skid-loader, or backhoe</td> | <td>Vacuum truck skid-loader, or backhoe</td> | ||
</tr> | </tr> | ||
</table> | </table> |
Above ground and below grade storage and settling - installation and maintenance recommendations
Link to this table
Device | Installation notes | Frequency of inspections | Maintenance checklist (link) | Permitted on private land/ Maintenance agreement recommended | Practices for minimizing sediment and trash buildup | Practices for minimizing erosion | Cost considerations (equipment needed and man hours) |
---|---|---|---|---|---|---|---|
Pretreatment row on underground storage/filtration | no data | At least every 6 months for first year of operation, then varies by location | Periodically remove sediment by back-flushing water and vacuuming manhole sump [1] | Vacuum truck | |||
StormTech Isolator Row | Installation instructions available here. | At least every 6 months for first year of operation, then varies by location [2] | Step by step maintenance procedures | Clean-out when average depth of sediment exceeds 3 inches [3] | Vacuum/JetVac combination vehicle [4] | ||
Settling chamber/vault | Remove sediment once depth reaches 6 inches or more [5] | ||||||
Oil/water/grit separators | After every major storm but at least once per month [6] | Clean out at least twice per year [7] | |||||
Hydro Dry Screen | Every 3-6 months during first year, then site specific [8] | Maintenance and inspection checklist [9] | Remove sediment once depth exceeds maximum clean-out depth [10] | Vacuum truck | |||
Suntree Nutrient Separating Baffle Box (NSBB) | After each runoff event initially, then at least quarterly. Local and State regulation may require every 90 days [11] | Inspection and maintenance checklist; [12] | Vacuum out sediment chambers when sediment accumulation exceeds 50% storage volume [13] | Vacuum truck | |||
Manhole Baffle Box | Frequently for first two years following installation, then site specific [14] | Fully cleaned at least once per year [15] | Vacuum truck; One half day; Average cost $450 [16] | ||||
Environment 21 StormPro | At least quarterly until a more accurate schedule can be determined [17] | Maintenance data sheet | Sediment should be removed when sediment depth in first chamber is 50% of design sediment storage depth or at least once per year [18] | Truck-mounted sewer and catch basin cleaner with vacuum pump [19] | |||
BaySeparator by BaySaver | At least every 6 months initially, then site specific [20] | Maintenance instructions | Cleaning recommended every 12-36 months or when 2 feet of sediment have accumulated [21] | Vacuum truck [22] | |||
Sump Manhole with SAFL Baffle | 45 minute installation [23] | Three times per year for first two years | Sediment removed before it reaches the bottom of the SAFL baffle | Vacuum truck [24] | |||
Deep sump catch basin | Four times per year and at the end of foliage and snow- removal seasons [25] | Four times per year or when deposit depth is greater than ½ depth from bottom of invert to lowest pipe [26] | Hood required | Vacuum truck or clamshell bucket [27] | |||
Forebay/pre-settling basin | Hard floor (concrete or grouted stone) allows definition of bottom and ease of maintenance. Provide appropriate stabilized maintenance access for heavier equipment at no more than 2% cross slope and no more than 10% longitudinal slope | Monthly [28] | Four times per year or when sediment depth is >3 ft. A hard bottom such as concrete facilitates removal, during design ensure forebay is vehicle accessible [29]; [30] | Forebay should be designed to withstand 2-yr and 10-yr velocities without scouring [31] | Vacuum truck skid-loader, or backhoe |