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Home My WebLink AboutM_601 Monster_Water Quality Vault Submittal_20190903.pdf(800) 579-8819 oldcastlestormwater.com © 2018 Oldcastle Precast, Inc. BioPod™ System with Proprietary StormMix™ High-Flow Media BioPod systems use StormMix media an engineerd high-ﬂow rate media (153 in/hr) to remove stormwater pollutants The BioPod system has received a General Use Level Designation (GULD) from the Washington State Department of Ecology for Basic (TSS), Phosphorus, and Enhanced (dissolved metals) treatment. Offering ﬂexibility of design and construction for your storm drain system BioPod systems come as an all-in- one, single-piece unit composed of durable precast concrete for ease of installation and a long service life. The BioPod system is offered in four conﬁgurations: High-Flow Bypass BioPod systems offer an optional internal high-ﬂow bypass that eliminates the need for a separate bypass structure, reducing costs and simplifying design so unit can be placed in a “sag” condition. Hydromodiﬁcation BioPod systems can be used in conjunction with other Oldcastle Stormwater detention systems to address hydromodiﬁcation and water treatment requirements. Collected ﬂows may be utilized to supplement irrigation of the unit or surrounding vegetated areas by integrating a harvesting system, reducing consumption of local potable water. oldcas lesto m i b s ci 2 0 CFS i P d l i pr r S r M s t n GU D p ro r si Ph s h us a E d t tme t fr e W i t S t partme t Ec l DO ) for t le st 0% r o l of TSS 50% r o al o ph p r l a l l i n i e l f a d t i t B P l gl i e n co p s d of r b ec oncret e t l n nd o s r c l T P te f e i f r c f r on od sy em u tu , u i i i d romodi ica ion er ex s ng torm ll y pp r g or g g a i h co o l abl e BioPod Planter Vault with media andvegetation. BioPod Underground Below-grade vault with media only, no vegetation. BioPod Surface At-grade vault with media only, no vegetation. dca l t pli i g d sig . junc io with oth ms as well s with B o od Med a Module Va t w h media only no Bio od Planter Modul Va lt w i d g lt e l BioPod Tree Vault with media andtree(s). July 2018 GENERAL USE LEVEL DESIGNATION FOR BASIC (TSS), DISSOLVED METALS (ENHANCED), AND PHOSPHORUS TREATMENT For Oldcastle Infrastructure, Inc.’s The BioPod™ Biofilter (Formerly the TreePod Biofilter) Ecology’s Decision: Based on Oldcastle Infrastructure, Inc. application submissions for the The BioPod™ Biofilter (BioPod), Ecology hereby issues the following use level designation: 1.General Use Level Designation (GULD) for Basic, Enhanced, and PhosphorusTreatment: Sized at a hydraulic loading rate of 1.6 gallons per minute (gpm) per square foot (sqft) of media surface area. 2.Ecology approves the BioPod at the hydraulic loading rate listed above, to achieve themaximum water quality design flow rate. The water quality design flow rates arecalculated using the following procedures: Western Washington: For treatment installed upstream of detention or retention,the water quality design flow rate is the peak 15-minute flow rate as calculated using the latest version of the Western Washington Hydrology Model or other Ecology-approved continuous runoff model. Eastern Washington: For treatment installed upstream of detention or retention,the water quality design flow rate is the peak 15-minute flow rate as calculated using one of the three methods described in Chapter 2.2.5 of the Stormwater ManagementManual for Eastern Washington (SWMMEW) or local manual. Entire State: For treatment installed downstream of detention, the water qualitydesign flow rate is the full 2-year release rate of the detention facility. 3.The GULD has no expiration date, but may be amended or revoked by Ecology. Ecology’s Conditions of Use: The BioPod shall comply with these conditions: 1)Oldcastle Infrastructure, Inc. shall design, assemble, install, operate, and maintain theBioPod installations in accordance with Oldcastle Infrastructure, Inc.’s applicablemanuals and the Ecology Decision. 2)BioPod media shall conform to the specifications submitted to and approved by Ecology 3)Maintenance: The required inspection/maintenance interval for stormwater treatmentdevices is often dependent on the efficiency of the device and the degree of pollutantloading from a particular drainage basin. Therefore, Ecology does not endorse orrecommend a “one size fits all” maintenance cycle for a particular model/size ofmanufactured filter treatment device. The BioPod is designed for a target maintenance interval of 1 year. Maintenanceincludes replacing the mulch, assessing plant health, removal of trash, and rakingthe top few inches of engineered media. A BioPod system tested at the Lake Union Ship Canal Test Facility in Seattle, WArequired maintenance after 1.5 months, or 6.3% of a water year. Monitoringpersonnel observed similar maintenance issues with other systems evaluated at theTest Facility. The runoff from the Test Facility may be unusual and maintenancerequirements of systems installed at the Test Facility may not be indicative ofmaintenance requirements for all sites. Test results provided to Ecology from a BioPod System evaluated in a lab followingNew Jersey Department of Environmental Protection Laboratory Protocol forFiltration MTDs have indicated the BioPod System is capable of longer maintenanceintervals. Owners/operators must inspect BioPod systems for a minimum of twelve monthsfrom the start of post-construction operation to determine site-specificinspection/maintenance schedules and requirements. Owners/operators mustconduct inspections monthly during the wet season, and every other month duringthe dry season. (According to the SWMMWW, the wet season in westernWashington is October 1 to April 30. According to the SWMMEW, the wet seasonin eastern Washington is October 1 to June 30.) After the first year of operation,owners/operators must conduct inspections based on the findings during the firstyear of inspections. Conduct inspections by qualified personnel, follow manufacturer’s guidelines, anduse methods capable of determining either a decrease in treated effluent flow rateand/or a decrease in pollutant removal ability. 4)Install the BioPod in such a manner that you bypass flows exceeding the maximum operating rate and you will not resuspend captured sediment. 5)Discharges from the BioPod shall not cause or contribute to water quality standardsviolations in receiving waters. Applicant: Oldcastle Infrastructure, Inc. Applicant’s Address: 360 Sutton Place Santa Rosa, CA 95407 Application Documents: Technical Evaluation Report TreePod™ BioFilter System Performance Certification Project, Prepared for Oldcastle, Inc., Prepared by Herrera Environmental Consultants, Inc. February 2018 Technical Memorandum: Response to Board of External Reviewers’ Comments on the Technical Evaluation Report for the TreePod™ Biofilter System Performance Certification Project, Oldcastle, Inc. and Herrera Environmental Consultants, Inc., February 2018 Technical Memorandum: Response to Board of External Reviewers’ Comments on the Technical Evaluation Report for the TreePod™ Biofilter System Performance Certification Project, Oldcastle, Inc. and Herrera Environmental Consultants, Inc., January 2018 Application for Pilot Use Level Designation, TreePod™ Biofilter – Stormwater Treatment System, Oldcastle Stormwater Solutions, May 2016 Emerging Stormwater Treatment Technologies Application for Certification: The TreePod™ Biofilter, Oldcastle Stormwater Solutions, April 2016 Applicant’s Use Level Request: General Use Level Designation as a Basic, Enhanced, and Phosphorus Treatment devicein accordance with Ecology’s Stormwater Management Manual for Western Washington Applicant’s Performance Claims: Based on results from laboratory and field-testing, the applicant claims the BioPod™ Biofilter operating at a hydraulic loading rate of 153 inches per hour is able to remove: 80% of Total Suspended Solids (TSS) for influent concentrations greater than 100 mg/Land achieve a 20 mg/L effluent for influent concentrations less than 100 mg/L. 60% dissolved zinc for influent concentrations 0.02 to 0.3 mg/L. 30% dissolved copper for influent concentrations 0.005 to 0.02 mg/L. 50% or greater total phosphorus for influent concentrations 0.1 to 0.5 mg/L. Ecology’s Recommendations: Ecology finds that:  Oldcastle Infrastructure, Inc. has shown Ecology, through laboratory and field testing, that the BioPod™ Biofilter is capable of attaining Ecology’s Basic, Total Phosphorus, and Enhanced treatment goals. Findings of Fact: Field Testing 1. Herrera Environmental Consultants, Inc. conducted monitoring of the BioPod™ Biofilter at the Lake Union Ship Canal Test Facility in Seattle Washington between November 2016 and April 2018. Herrera collected flow-weight composite samples during 14 separate storm events and peak flow grab samples during 3 separate storm events. The system was sized at an infiltration rate of 153 inches per hour or a hydraulic loading rate of 1.6 gpm/ft2. 2. The D50 of the influent PSD ranged from 3 to 292 microns, with an average D50 of 28 microns. 3. Influent TSS concentrations ranged from 17 mg/L to 666 mg/L, with a mean concentration of 98 mg/L. For all samples (influent concentrations above and below 100 mg/L) the bootstrap estimate of the lower 95 percent confidence limit (LCL 95) of the mean TSS reduction was 84% and the bootstrap estimate of the upper 95 percent confidence limit (UCL95) of the mean TSS effluent concentration was 8.2 mg/L. 4. Dissolved copper influent concentrations from the 17 events ranged from 9.0 µg/L to 21.1 µg/L. The 21.1 µg/L data point was reduced to 20.0 µg/L, the upper limit to the TAPE allowed influent concentration range, prior to calculating the pollutant removal. A bootstrap estimate of the LCL95 of the mean dissolved copper reduction was 35%. 5. Dissolved zinc influent concentrations from the 17 events ranged from 26.1 µg/L to 43.3 µg/L. A bootstrap estimate of the LCL95 of the mean dissolved zinc reduction was 71%. 6. Total phosphorus influent concentrations from the 17 events ranged from 0.064 mg/L to 1.56 mg/L. All influent data greater than 0.5 mg/L were reduced to 0.5 mg/L, the upper limit to the TAPE allowed influent concentration range, prior to calculating the pollutant removal. A bootstrap estimate of the LCL95 of the mean total phosphorus reduction was 64%. 7. The system experienced rapid sediment loading and needed to be maintained after 1.5 months. Monitoring personnel observed similar sediment loading issues with other systems evaluated at the Test Facility. The runoff from the Test Facility may not be indicative of maintenance requirements for all sites. Laboratory Testing 1. Good Harbour Laboratories (GHL) conducted laboratory testing at their site in Mississauga, Ontario in October 2017 following the New Jersey Department of Environmental Protection Laboratory Protocol for Filtration MTDs. The testing evaluated a 4-foot by 6-foot standard biofiltration chamber and inlet contour rack with bypass weir. The test sediment used during the testing was custom blended by GHL using various commercially available silica sands, which had an average d50 of 69 µm. Based on the lab test results: a.GHL evaluated removal efficiency over 15 events at a Maximum Treatment Flow Rate (MTFR) of 37.6 gpm, which corresponds to a MTFR to effective filtration treatment arearatio of 1.80 gpm/ft2. The system, operating at 100% of the MTFR with an averageinfluent concentration of 201.3 mg/L, had an average removal efficiency of 99 percent.b. GHL evaluated sediment mass loading capacity over an additional 16 events using aninfluent SSC concentration of 400 mg/L. The first 11 runs were evaluated at 100% of the MTFR. The BioPod began to bypass, so the remaining 5 runs were evaluated at 90% ofthe MTFR. The total mass of the sediment captured was 245.0 lbs and the cumulativemass removal efficiency was 96.3%.2. Herrera Environmental Consultants Inc. conducted laboratory testing in September 2014 atthe Seattle University Engineering Laboratory. The testing evaluated the flushing characteristics, hydraulic conductivity, and pollutant removal ability of twelve differentmedia blends. Based on this testing, Oldcastle Infrastructure, Inc. selected one media blend,Mix 8, for inclusion in their TAPE evaluation of the BioPod™ Biofilter.a.Herrera evaluated Mix 8 in an 8-inch diameter by 36-inch tall polyvinyl chloride (PVC)column. The column contained 18-inches of Mix 8 on top of 6-inches of pea gravel. The BioPod will normally include a 3-inch mulch layer on top of the media layer; however,this was not included in the laboratory testing.b. Mix 8 has a hydraulic conductivity of 218 inches per hour; however, evaluation of thepollutant removal ability of the media was based on an infiltration rate of 115 inches perhour. The media was tested at 75%, 100%, and 125% of the infiltration rate. Based on the lab test results: The system was evaluated using natural stormwater. The dissolved copper anddissolved zinc concentrations in the natural stormwater were lower than the TAPEinfluent standards; therefore, the stormwater was spiked with 66.4 mL of 100 mg/L Cu solution and 113.6 mL of 1,000 mg/L Zn solution. The BioPod removed an average of 81% of TSS, with a mean influent concentrationof 48.4 mg/L and a mean effluent concentration of 9.8 mg/L. The BioPod removed an average of 94% of dissolved copper, with a mean influent concentration of 10.6 µg/L and a mean effluent concentration of 0.6 µg/L. The BioPod removed an average of 97% of dissolved zinc, with a mean influentconcentration of 117 µg/L and a mean effluent concentration of 4 µg/L. The BioPod removed an average of 97% of total phosphorus, with a mean influent concentration of 2.52 mg/L and a mean effluent concentration of 0.066 mg/L. Whentotal phosphorus influent concentrations were capped at the TAPE upper limit of 0.5mg/L, calculations showed an average removal of 87%. Other BioPod Related Issues to be Addressed By the Company: 1. Conduct hydraulic testing to obtain information about maintenance requirements on a sitewith runoff that is more typical of the Pacific Northwest. Technology Description: Download at https://oldcastleprecast.com/stormwater/bioretention-biofiltration-applications/bioretention-biofiltration-solutions/ Contact Information: Applicant: Chris Demarest Oldcastle Infrastructure, Inc. (925) 667-7100Chris.demarest@oldcastle.com Applicant website: https://oldcastleprecast.com/stormwater/ Ecology web link: https://ecology.wa.gov/Regulations-Permits/Guidance-technical- assistance/Stormwater-permittee-guidance-resources/Emerging-stormwater-treatment-technologies Ecology: Douglas C. Howie, P.E. Department of Ecology Water Quality Program (360) 407-6444douglas.howie@ecy.wa.gov Revision History Date Revision March 2018 GULD granted for Basic Treatment March 2018 Provisional GULD granted for Enhanced and Phosphorus Treatment June 2016 PULD Granted April 2018 GULD for Basic and Provisional GULD for Enhanced and Phosphorus granted, changed name to BioPod from TreePod July 2018 GULD for Enhanced and Phosphorus granted BioPod™ Biofilter with StormMix™ Biofiltration Media Description The BioPod™ Biofilter System (BioPod) is a stormwater biofiltration treatment system used to remove pollutants from stormwater runoff. Impervious surfaces and other urban and suburban landscapes generate a variety of contaminants that can enter stormwater and pollute downstream receiving waters unless treatment is provided. The BioPod system ><e< proprietary tor3iAS &io+i1tratio4 3e(ia to capture a4( retai4 po11>ta4t< i4'1>(i4, tota1 <><pe4(e( <o1i(< Z 3eta1<Z 4>trie4t<Z ,ro<< <o1i(<Z tra<- a4( (e&ri< a< @e11 a< petro1e>3 -y(ro'ar&o4<Y Function The BioPod system uses engineered, high-flow rate filter media to remove stormwater pollutants, allowing for a smaller footprint than conventional bioretention systems. Contained within a compact precast concrete vault, the BioPod system consists of a biofiltration chamber and an optional integrated high-flow bypass with a contoured inlet rack to minimize scour. The biofiltration chamber is filled with horizontal layers of aggregate (which may or may not include an underdrain), biofiltration media and mulch. Stormwater passes vertically down through the mulch and biofiltration media for treatment. The mulch provides pretreatment by retaining most of the solids or sediment. The biofiltration media provides further treatment by retaining finer sediment and dissolved pollutants. The aggregate allows the media bed to drain evenly for discharge through an underdrain pipe or by infiltration. Configuration The BioPod system can be configured with either an internal or external bypass. The internal bypass allows both water quality and bypass flows to enter the treatment vault. The water quality flows are directed to the biofiltration chamber while the excess flows are diverted over the bypass weir without entering the biofiltration chamber. Both the treatment and bypass flows are combined in the outlet area prior to discharge from the structure. BioPod units without an internal bypass are designed such that only treatment flows enter the treatment structure. When the system has exceeded its treatment capacity, ponding will force bypass flows to continue down the gutter to the nearest standard catch basin or other external bypass structure. The BioPod system can be configured as a tree box filter with tree and grated inlet, as a planter box filter with shrubs, grasses and an open top, or as an underground filter with access risers, doors and a subsurface inlet pipe. The optional internal bypass may be incorporated with any of these configurations. In addition, an open bottom configuration may be used to promote infiltration and groundwater recharge. The configuration and size of the BioPod system is designed to meet the requirements of a specific project. Inspection & Maintenance Overview State and local regulations require all stormwater management systems to be inspected on a regular basis and maintained as necessary to ensure performance and protect downstream receiving waters. Without maintenance, excessive pollutant buildup can limit system performance by reducing the operating capacity of the system and increasing the potential for scouring of pollutants during periods of high flow. Some configurations of the BioPod may require periodic irrigation to establish and maintain vegetation. Vegetation will typically become established about two years after planting. Irrigation requirements are ultimately dependent on climate, rainfall and the type of vegetation selected. 2 Natural, shredded hardwood mulch should be used in the BioPod. Timely replacement of the mulch layer according to the maintenance indicators described above should protect the bioﬁltration media below the mulch layer from clogging due to sediment accumulation. However, whenever the mulch is replaced, the BioPod should be visited 24 hours after the next major storm event to ensure that there is no standing water in the bioﬁltration chamber. Standing water indicates that the biofiltration media below the mulch layer is clogged and must be replaced. Please contact Oldcastle Stormwater at (800) 579-8819 to purchase proprietary tor3iA biofiltration media. 5 Curb Inlet or Inlet Rack Blocked Notes: Yes No 6 BioPod Inspection & Maintenance Log BioPod Model__________________________ Inspection Date________________________ Location______________________________________________________________________________ Condition of Internal Components Notes: Good Damaged Missing Standing Water in Bioﬁltration Chamber Notes: Yes No Trash and Debris in Inlet Rack Notes: Yes No Trash and Debris in Bioﬁltration Chamber Notes: Yes No Maintenance Requirements Yes - Schedule Maintenance No - Schedule Re-Inspection Invasive Vegetation in Bioﬁltration Chamber Notes: Yes No Sediment in Bioﬁltration Chamber Notes: Light Medium Heavy Erosion in Bioﬁltration Chamber Notes: Yes No