Certifying the Performance of Manufactured Stormwater Treatment - - PowerPoint PPT Presentation

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Certifying the Performance of Manufactured Stormwater Treatment - - PowerPoint PPT Presentation

Jul 07, 2023 149 likes •636 views

Certifying the Performance of Manufactured Stormwater Treatment Devices: A Review of the TAPE Process and Testing Centers 1 Dylan Ahearn, PhD TAPE expert for 10+ years Had a hand in >90% of TAPE approvals Helped draft the 2011

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Certifying the Performance of Manufactured Stormwater Treatment Devices: A Review of the TAPE Process and Testing Centers

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Dylan Ahearn, PhD

  • TAPE expert for 10+ years
  • Had a hand in >90% of

TAPE approvals

  • Helped draft the 2011

and 2018 TAPE protocols

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INTRODUCTION

  • Technology Assessment Protocol Ecology: TAPE
  • Ship Canal Test Facility
  • The Next Generation of Testing - STTC
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The TAPE Protocol

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BMP Selection

  • Ecology sets guidance for

which BMPs can be used

  • Specific BMPs are required

for specific pollutants

  • Most BMPs are

grandfathered in

Why TAPE?

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The TAPE Protocol

Emer erging T g Technology

  • Testing program first established

in 2002

  • Most recent revision in 2018
  • Most rigorous and active testing

protocol in the nation

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The TAPE Protocol

Jurisdictions t that recogn gnize T e TAPE

  • 1. Washington
  • 2. Oregon
  • 3. New York
  • 4. Virginia
  • 5. New Hampshire
  • 6. Rhode Island
  • 7. Many smaller jurisdictions
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The TAPE Protocol

Cer erti tifi ficati tions

  • General Use – GULD
  • use at will
  • Conditional Use – CULD
  • install up to 10, monitor 1
  • Pilot Use – PULD
  • install up to 5, monitor all
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The TAPE Protocol

Certif ification ion C Categorie ies

  • Basic – TSS
  • Enhanced – dissolved Cu and Zn
  • Phosphorus – TP
  • Oil – NWTPH – Oil fraction
  • Pretreatment - TSS
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  • Board of External Reviewers (BER)
  • Stormwater experts from across the United States
  • Stakeholders Advisory Group (SAG)
  • Stormwater professionals from government agencies

throughout Washington State and the City of Portland, OR

The TAPE Protocol

External Review

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Receive P/CULD

BER Review

Find Potential Field Site Evaluate Site

Finalize Site

Prepare QAPP Submit App. BER Review

QAPP Approved

Field Evaluation

Prepare TER

Receive GULD

BER Review

~ 3 years

The TAPE Protocol

The Process

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The TAPE Protocol

Current TAPE Program

  • Currently about 15 treatment technologies active in

the TAPE program, at various stages:

  • Initial application
  • QAPP being reviewed
  • Monitoring underway
  • TER being reviewed
  • 13 technologies with a current basic treatment GULD

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BMP Selection

  • Contech StormFilter (perlite, ZPG, Phosphosorb)
  • Contech Filterra (normal, bioscape)
  • Oldcastle Perk Filter
  • Watertechtonics EcoStorm Plus
  • BioClean Modular Wetland System
  • Baysaver BayFilter
  • WSDOT Media Filter Drain
  • WSDOT compost amended swale
  • Oldcastle BioPod

Dept of Ecology Approved MTDs (TSS removal)

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The TAPE Protocol

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Future of TAPE

  • TAPE approval accepted in various municipalities around

the country

  • A model for a national certification protocol – Stormwater

Testing and Evaluation for Products and Practices (STEPP)

Nationally recognized testing protocol

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The TAPE Protocol

What D t Does es T TAPE M E Monitoring L Look Like ke?

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The TAPE Protocol

  • Continuous Flow Monitoring
  • Collect flow-weighted

composite samples

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The TAPE Protocol

Rigo gorous A Accep eptance Crite teria

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The TAPE Protocol

Rigo gorous A Accep eptance Crite teria

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The TAPE Protocol

Parameter eters

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The TAPE Protocol

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MP8 IN

y = 3E-05x - 0.0223 R2 = 0.7929 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 10000 20000 30000 40000 50000 60000 70000 80000 90000 100000

Influent volume (cf) Storm Depth (in)

The TAPE Protocol

Q Tim Time

Storm volume = 1300 cf Pacing = 100 cf Samples = 13 Coverage = 100 %

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The TAPE Protocol

Basic T Treatme ment

  • 80% removal of TSS (influent = 100 to 200 mg/L)
  • 20 mg/L TSS effluent goal (influent <100 mg/L)

Enhanc nced T d Treatment

  • Influent dissolved copper range = 0.003 to 0.02 mg/L
  • Influent dissolved zinc range = 0.02 to 0.3 mg/L
  • 30% reduction of dissolved copper
  • 60% reduction of dissolved zinc

Phospho phorus us T Treatment

  • Influent total phosphorus range = 0.1 – 0.5 mg/L
  • 50% reduction of total phosphorus

Oil T Trea eatment

  • Influent >10 mg/L
  • Daily average TPH <10 mg/L
  • Maximum TPH discrete (grab) sample <15 mg/L
  • No visible sheen
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The TAPE Protocol

Performance at Specific Flow Rates

  • Meeting performance goals must occur at 100% to

get approved at your desired design flow rate

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The TAPE Protocol

Labor a and Tech I Inten tensive

  • $15,000 equipment
  • $200,000 total cost
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Ship Canal Test Facility

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Overview

  • Built 2001

2001

  • 31.6

6 acre b e basi sin

  • 22.7

7 acres i es imper pervi vious

  • 8.9 acres r

es roadsi dside l e land ndsc scaping

  • 1,980 g

80 gpm pm = = 6 6-month s h storm

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Four Test Bays

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Draw-Pipe

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Four Test Bays

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Flow Splitter

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Flow Splitter

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Valve Splitter

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Bay 1 Planview

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Flow Measurement

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Sample Collection

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The Brains

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Influent Chemistry

Parameter Units Influent TSS mg/L 73.1 TP ug/L 151 D Cu ug/L 15.2 D Zn ug/L 49.2 NO3 ug/L 373 PSD clay % 28 PSD silt % 35 PSD sand % 37 D50 uM 21

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Stormwater Technology Testing Center

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Stormwater Technology Testing Center

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Sou

  • urce W

e Water

  • Drainage area: ~1,000 acres
  • Land use: high traffic highway and mixed urban
  • Divert flows from 84 inch storm drain along I-205 at Columbia Slough
  • Flows
  • Peak = 25 cfs (1/2 – 2 yr); 660 cfs (100 yr)
  • Utilize existing 36 inch diversion and 6 foot manhole
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Di Diversion S Structure

Sediment flows both ways at diversion

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Si Site D e Desi esign

  • Simultaneously test three systems
  • Three 14 X 17 foot test bays
  • Both Gravity and Pumped Conveyance!
  • AODD Pumps = Flow Meters
  • Positive Displacement
  • PLC counts pump cycles to calculate flow rate
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Si Site D Design

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Si Site D Design

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Si Site D Design