m |
m (→Data analysis) |
||
(4 intermediate revisions by the same user not shown) | |||
Line 1: | Line 1: | ||
{{alert|''Reference to specific commercial products, processes, or services by trade name, trademark, service mark, manufacturer, or otherwise does not constitute or imply endorsement, recommendation, or favoring by the Minnesota Pollution Control Agency. ''|alert-info}} | {{alert|''Reference to specific commercial products, processes, or services by trade name, trademark, service mark, manufacturer, or otherwise does not constitute or imply endorsement, recommendation, or favoring by the Minnesota Pollution Control Agency. ''|alert-info}} | ||
− | Up-Flo Filter w/Filter Ribbons is is an advanced stormwater treatment system that combines sedimentation and screening with filtration | + | Up-Flo Filter w/Filter Ribbons is is an advanced stormwater treatment system that combines sedimentation and screening with filtration. It is classified as a <span title="A manufactured treatment device (mtd) is a pre-fabricated stormwater treatment structure utilizing settling (sedimentation), filtration, absorptive/adsorptive materials, vortex separation, vegetative components, and/or other appropriate technology to remove pollutants from stormwater runoff. MTDs are typically proprietary devices."> '''manufactured treatment device'''</span> (mtd). |
This page provides information on pollutant removal credits for Up-Flo Filter w/Filter Ribbons, links to supporting information, and links to information on system design, inspection, operation, and maintenance. | This page provides information on pollutant removal credits for Up-Flo Filter w/Filter Ribbons, links to supporting information, and links to information on system design, inspection, operation, and maintenance. | ||
Line 19: | Line 19: | ||
===Configurations=== | ===Configurations=== | ||
− | + | Not applicable | |
− | |||
===Use conditions=== | ===Use conditions=== | ||
Line 28: | Line 27: | ||
#Systems are designed to treat a specified water quality volume or annual average runoff volume. The annual average runoff treated can be determined using [https://stormwater.pca.state.mn.us/index.php?title=TP_and_TSS_credits_and_guidance_for_manufactured_treatment_devices_(mtds)#Calculating_annual_volume_treated methods that are specified here]. | #Systems are designed to treat a specified water quality volume or annual average runoff volume. The annual average runoff treated can be determined using [https://stormwater.pca.state.mn.us/index.php?title=TP_and_TSS_credits_and_guidance_for_manufactured_treatment_devices_(mtds)#Calculating_annual_volume_treated methods that are specified here]. | ||
#Each site plan must undergo Up-Flo Filter w/Filter Ribbons review before approval of the unit for site installation. | #Each site plan must undergo Up-Flo Filter w/Filter Ribbons review before approval of the unit for site installation. | ||
− | |||
#Follow maintenance procedures given in the most recent version of the [https://swbmp.vwrrc.vt.edu/wp-content/uploads/2022/05/Filter_Application_2021_Up-Flow-Filter-using-Ribbon_Item-3.pdf Up-Flo Filter w/Filter Ribbons Operation and Maintenance Manual]. | #Follow maintenance procedures given in the most recent version of the [https://swbmp.vwrrc.vt.edu/wp-content/uploads/2022/05/Filter_Application_2021_Up-Flow-Filter-using-Ribbon_Item-3.pdf Up-Flo Filter w/Filter Ribbons Operation and Maintenance Manual]. | ||
− | |||
#Discharges from the Up-Flo Filter w/Filter Ribbons units shall not cause or contribute to water quality standards violations in receiving waters. | #Discharges from the Up-Flo Filter w/Filter Ribbons units shall not cause or contribute to water quality standards violations in receiving waters. | ||
#When applicable, adhere to use conditions provided in Washington State Department of Ecology's report (Ecology's Conditions of Use) [https://fortress.wa.gov/ecy/ezshare/wq/tape/use_designations/HYDROinternationalUPFLOfilterGULD.pdf GENERAL USE LEVEL DESIGNATION FOR BASIC (TSS) AND PHOSPHORUS TREATMENT For Hydro International, Inc. Up-Flo® Filter Using Filter Ribbons]. Note that some information in this report is specific to Washington State and not applicable to Minnesota. | #When applicable, adhere to use conditions provided in Washington State Department of Ecology's report (Ecology's Conditions of Use) [https://fortress.wa.gov/ecy/ezshare/wq/tape/use_designations/HYDROinternationalUPFLOfilterGULD.pdf GENERAL USE LEVEL DESIGNATION FOR BASIC (TSS) AND PHOSPHORUS TREATMENT For Hydro International, Inc. Up-Flo® Filter Using Filter Ribbons]. Note that some information in this report is specific to Washington State and not applicable to Minnesota. | ||
Line 39: | Line 36: | ||
The Tier 1 credit equals the TAPE-approved credits. Tier 2 and Tier 3 credits were determined by analyzing water quality data collected at a system tested at the Lake Union Ship Canal Test Facility in Seattle, WA required servicing after 4 months or 12.7% of a water year. The site consisted of transportation land use with 22.7 acres of impervious draining to the device. The device was 18.7 ft<sup>2</sup>. | The Tier 1 credit equals the TAPE-approved credits. Tier 2 and Tier 3 credits were determined by analyzing water quality data collected at a system tested at the Lake Union Ship Canal Test Facility in Seattle, WA required servicing after 4 months or 12.7% of a water year. The site consisted of transportation land use with 22.7 acres of impervious draining to the device. The device was 18.7 ft<sup>2</sup>. | ||
− | MPCA compiled data from | + | MPCA compiled data from TAPE Technical Evaluation Report generated for the site. Below are summary statistics for the device. |
*Median TP inflow - 0.109 mg/L | *Median TP inflow - 0.109 mg/L | ||
*Median TP removal (all data) - 50.3% | *Median TP removal (all data) - 50.3% | ||
Line 47: | Line 44: | ||
*Median TSS removal (all data) - 75% | *Median TSS removal (all data) - 75% | ||
*95% lower confidence limit TSS removal (all data) - 59.9% | *95% lower confidence limit TSS removal (all data) - 59.9% | ||
− | TAPE means and medians represent values meeting TAPE criteria for TP (inflow concentrations of 0.1 to 0.5 mg/L) and TSS (inflow concentrations greater than 20 mg/L). Of the | + | TAPE means and medians represent values meeting TAPE criteria for TP (inflow concentrations of 0.1 to 0.5 mg/L) and TSS (inflow concentrations greater than 20 mg/L). Of the 20 samples, TAPE medians and means represent 13 samples for TP. |
The 95% boot strap TP-removal LCL for TAPE-analyzed data was 49.9%. The LCL for all data was 19.1%, but there appeared to be multiple outliers in the dataset. The TAPE approval document noted the small median particle size (11 microns) in runoff to the device, citing multiple times when the device became clogged and required maintenance: "The system was subjected to atypical sediment loading and needed to be serviced after 4 months, or 12.7% of a water year. Monitoring personnel observed similar sediment loading and blinding issues with other systems evaluated at the Test Facility. The runoff from the Test Facility is not expected to be characteristic of other urban runoff applications". We therefore recommend using the TAPE LCL of 50% for Tier 1 TP credit. | The 95% boot strap TP-removal LCL for TAPE-analyzed data was 49.9%. The LCL for all data was 19.1%, but there appeared to be multiple outliers in the dataset. The TAPE approval document noted the small median particle size (11 microns) in runoff to the device, citing multiple times when the device became clogged and required maintenance: "The system was subjected to atypical sediment loading and needed to be serviced after 4 months, or 12.7% of a water year. Monitoring personnel observed similar sediment loading and blinding issues with other systems evaluated at the Test Facility. The runoff from the Test Facility is not expected to be characteristic of other urban runoff applications". We therefore recommend using the TAPE LCL of 50% for Tier 1 TP credit. |
Up-Flo Filter w/Filter Ribbons is is an advanced stormwater treatment system that combines sedimentation and screening with filtration. It is classified as a manufactured treatment device (mtd).
This page provides information on pollutant removal credits for Up-Flo Filter w/Filter Ribbons, links to supporting information, and links to information on system design, inspection, operation, and maintenance.
When conditions described in this section are met, applicable Up-Flo Filter w/Filter Ribbons systems are approved for the following removals for total suspended solids (TSS) and total phosphorus (TP).
For more information on credits, see TP and TSS credits and guidance for manufactured treatment devices (mtds)
Not applicable
To receive the full credit, Up-Flo Filter w/Filter Ribbons systems must comply with the following conditions.
Credits apply only to the water being treated by a device. The applicable treatment volume must be determined using one of the methods described here.
The Tier 1 credit equals the TAPE-approved credits. Tier 2 and Tier 3 credits were determined by analyzing water quality data collected at a system tested at the Lake Union Ship Canal Test Facility in Seattle, WA required servicing after 4 months or 12.7% of a water year. The site consisted of transportation land use with 22.7 acres of impervious draining to the device. The device was 18.7 ft2.
MPCA compiled data from TAPE Technical Evaluation Report generated for the site. Below are summary statistics for the device.
TAPE means and medians represent values meeting TAPE criteria for TP (inflow concentrations of 0.1 to 0.5 mg/L) and TSS (inflow concentrations greater than 20 mg/L). Of the 20 samples, TAPE medians and means represent 13 samples for TP.
The 95% boot strap TP-removal LCL for TAPE-analyzed data was 49.9%. The LCL for all data was 19.1%, but there appeared to be multiple outliers in the dataset. The TAPE approval document noted the small median particle size (11 microns) in runoff to the device, citing multiple times when the device became clogged and required maintenance: "The system was subjected to atypical sediment loading and needed to be serviced after 4 months, or 12.7% of a water year. Monitoring personnel observed similar sediment loading and blinding issues with other systems evaluated at the Test Facility. The runoff from the Test Facility is not expected to be characteristic of other urban runoff applications". We therefore recommend using the TAPE LCL of 50% for Tier 1 TP credit.
No Tier 2 or Tier 3 credit is given for this device based on data collected for TAPE certification.
TSS credit is the TAPE default of 80% since the LCL was less than 80%
The median particle size for the tested device was 11 microns, which likely accounts for the relatively poor performance compared to other mtds.
To link to the Excel spreadsheet containing water monitoring data click here
Meet the conditions specified for the appropriate TP and/or TSS credit.
Meet the following conditions, unless conditions for the appropriate TP and/or TSS credit are more stringent.
This page was last edited on 16 February 2023, at 15:30.