History 11/16/2015. Stormwater Technology Testing Center. Stormwater Technology Testing Center. Stormwater Technology Testing Center

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Beverly Allison
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1 Stormwater Technology Testing Center (STTC) Presented by: Paul R. Wirfs, PE November 2015 Mission The STTC s mission is to verify the operation and maintenance performance and life-cycle costs of stormwater treatment technologies that have the potential to improve and protect water quality. 3 History Informal Gathering of Gov Stormwater Professionals Common Challenges Literature Search / Interviews Identified Needs Maintainability information Sustainable Business Model ODOT Stormwater Retrofit Program Maintainability Evaluation for Stormwater Treatment Systems Site development to test/evaluate SW treatment systems Began development in Goals The STTC will be used for testing stormwater treatment systems for their effectiveness and maintainability. Provide a cost effective site for evaluating effectiveness. Provide maintainability data. Provide life-cycle cost data. 4

2 Development Steps Business Plan Maintainability Metrics / Protocols QAPP Board of Directors Site Selection Site Design Site Construction Stakeholder Involvement ODOT Clean Water Services City of Portland (Bureau of Environmental Services) Other state and local governments Stormwater Equipment Manufactures Association Other testing protocol organizations Washington State Department of Ecology Washington Stormwater Center 5 7 Coordination Washington Department of Ecology s Technology Assessment Protocol Ecology (TAPE) guidelines Stakeholder Group 6 Business Plan 8

Development Examined 12 existing business and service models Facilitated a stakeholder meeting - Jan 26, 2012 Draft business plan February 2013 Final Business plan April 2013 9 Organizational

3 Development Examined 12 existing business and service models Facilitated a stakeholder meeting - Jan 26, 2012 Draft business plan February 2013 Final Business plan April Organizational Structure 11 Contents Organization Market Analysis Service / Operational Plan Financial Plan Operation STTC Board will select an entity to operate the center. The Operator will provide: Administration Operation Technology Testing Resource Management Marketing 10 12

data on O&M requirements Testing must evaluate bypass frequency if possible Verify sizing correct Verify

4 Protocols 13 Background 2011 TAPE protocol No evaluation of maintenance and life-cycle costs No evaluation of required level of effort for maintenance 15 Background 2011 TAPE protocol Applicant must provide available data on O&M requirements Testing must evaluate bypass frequency if possible Verify sizing correct Verify applicants claims regarding maintenance Accumulated sediment sampling where feasible 14 Maintainability Protocols 16

19 Fictional data provided for example purposes only Suspended Sediment Concentration Loading 0 0 10 20 30 40 50 60 70 80 90 100 2 Flow Rate at Bypass 12 Design Flow Rate 10 8 6 4 14 16 Maintenance

Baseline Solids Loading Start with a clean installation Deliver polluted runoff to the system Monitoring influent discharge and chemistry Halt testing at maintenance threshold Hydraulic capacity

5 19 Fictional data provided for example purposes only Suspended Sediment Concentration Loading Flow Rate at Bypass 12 Design Flow Rate Maintenance Threshold 17 Step 4: Calculate lifecycle maintenance costs Step 3: Calculate baseline maintenance cycle Step 2: Determine maintenance needs Step 1: Test Baseline Solids Loading Approach STEP 1: Test Baseline Solids Loading Start with a clean installation Deliver polluted runoff to the system Monitoring influent discharge and chemistry Halt testing at maintenance threshold Hydraulic capacity reduced to 80 percent of design capacity Continue testing to lower threshold as needed Quantify SSC load delivered at maintenance threshold 18 STEP 2: Determine Maintenance Needs Routine Inspection Visual inspection, removal of gross solids and debris, sediment depth assessment, inspection of plant health. Routine Maintenance Vactoringsediment from settling chambers, replacing prefilter media, trimming vegetation. System Recharge Vactoringsediment from settling chambers, replacing primary filtration media, replacing plants. Additional Maintenance Actions Unanticipated maintenance procedures (e.g., fixing leaks, adjusting orifice diameters, etc.) 20

Step 3: Calculate baseline maintenance cycle Estimate sediment loading rate from hypothetical basin Iteratively size basin using WWHM to deliver design flow for water quality treatment

divided by measured load at maintenance threshold 21 No Certification or Approval The STTC will NOTcertify or approve systems The STTC will only report data 23 Step 4: Calculate

Apply inflation rates for each activity, convert to present values by applying a discount rate.

6 Step 3: Calculate baseline maintenance cycle Estimate sediment loading rate from hypothetical basin Iteratively size basin using WWHM to deliver design flow for water quality treatment goal Calculate annual runoff volume Estimate annual sediment load using Representative TSS concentrations Derive annual maintenance cycle Annual sediment load from hypothetical basin divided by measured load at maintenance threshold 21 No Certification or Approval The STTC will NOTcertify or approve systems The STTC will only report data 23 Step 4: Calculate lifecycle maintenance costs Estimate annual costs for each maintenance activities over a facility life cycle of 20 years. Apply inflation rates for each activity, convert to present values by applying a discount rate. Calculate lifecycle maintenance costs as the net present value (NPV) of total maintenance costs incurred over the facility life cycle of 20 years. 22 Quality Assurance Project Plan (QAPP) Approved by Ecology in May 2015 Allows testing at ODOT facility using a Standardized Test Hydrograph QAPP addenda required for individual technologies 24

25 Site Design and Construction Site Selection Adequate stormwater supply Representative stormwater Adequate facility site area Appropriate discharge point Gravity flow stormwater conveyance to the

7 25 Site Design and Construction Site Selection Adequate stormwater supply Representative stormwater Adequate facility site area Appropriate discharge point Gravity flow stormwater conveyance to the testing facility Safe access 27 Goals Flexible to test a range of stormwater treatment BMP types, starting with proprietary devices Representative of hydrologic and water quality conditions in urban stormwater Convenient and cost-effective for agencies and equipment manufacturers to evaluate BMP effectiveness Expandable to test more facilities in the future, including potentially testing the effectiveness of traditional stormwater BMPs 26 STTC Location: Columbia Slough 28

29 STTC Location: I-205 @ Columbia Slough ODOT East Portland Maintenance

use: high traffic highway and mixed urban 30 Divert flows from 84 inch

5 cfs; max = 29 cfs Flows Peak = 25 cfs (1/2 2 yr); 660 cfs (100 yr)

X 17 foot pads Simultaneously test three systems Pump Operation Controlled

8 29 STTC Location: Columbia Slough ODOT East Portland Maintenance Yard Diversion Structure 31 Site Design Drainage area: ~1,000 acres Land use: high traffic highway and mixed urban 30 Divert flows from 84 inch storm drain along I-205 at Columbia Slough average = 3.5 cfs; max = 29 cfs Flows Peak = 25 cfs (1/2 2 yr); 660 cfs (100 yr) Utilize existing 36 inch diversion and 6 foot wet well Site Design Three 14 X 17 foot pads Simultaneously test three systems Pump Operation Controlled discharge rates up to 125 GPM Gravity Operation Controlled discharge rates up to 250 GPM Expansion Area 1.5 acres 32

9 Site Layout 33 Why is the STTC Important? Assists end-users of stormwater treatment technologies. NPDES compliance Life-Cycle information Independent evaluation of technologies 35 Under Construction 34 Why Become an STTC Member Agency? Immediate access to maintenance metrics Access to maintenance cost estimating tools. Contribute to independent evaluations Opportunity to influence STTC operations 36

10 Membership Fees Net yet established by the Board Phase I: Set-Up and Calibration $300,000 total needed $25,000 per contributor Phase II: Operation $5,000 per year per member agency Questions? Thank you Next Steps Complete Site Construction Secure Funding for Calibration and Start-up Transportation Pooled Fund Research Solicitation (#1397) State Transportation Innovation Council (STIC) Incentive program allocation Agency Membership Board Implement Business Plan Select entity to operate facility Coordinate with STEPP initiative StormwaterTesting and Evaluation for Products and Practice 38

Stormwater Technology Testing Center (STTC) Presented by: Paul R. Wirfs, PE and Dan Gunther, PE April 2016

Stormwater Technology Testing Center (STTC) Presented by: Paul R. Wirfs, PE and Dan Gunther, PE April 2016 Stormwater There is a lot going on.... Stormwater Treatment - Engineering in many forms.. Stormwater