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

Transcription

1 Certifying the Performance of Manufactured Stormwater Treatment Devices: A Review of the TAPE Process and Testing Centers 1

2 Dylan Ahearn, PhD TAPE expert for 10+ years Had a hand in >90% of TAPE approvals Helped draft the 2011 and 2018 TAPE protocols 2

3 INTRODUCTION - Technology Assessment Protocol Ecology: TAPE - Ship Canal Test Facility - The Next Generation of Testing - STTC 3

4 The TAPE Protocol 4

5 BMP Selection Why TAPE? Ecology sets guidance for which BMPs can be used Specific BMPs are required for specific pollutants Most BMPs are grandfathered in 5

6 The TAPE Protocol Emerging Technology Testing program first established in 2002 Most recent revision in 2018 Most rigorous and active testing protocol in the nation 6

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

8 The TAPE Protocol Certifications General Use GULD - use at will Conditional Use CULD - install up to 10, monitor 1 Pilot Use PULD -install up to 5, monitor all 8

9 The TAPE Protocol Certification Categories Basic TSS Enhanced dissolved Cu and Zn Phosphorus TP Oil NWTPH Oil fraction Pretreatment - TSS 9

10 The TAPE Protocol External Review 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 10

11 The TAPE Protocol The Process BER Review ~ 3 years Submit App. Receive P/CULD Find Potential Field Site BER Review BER Review Finalize Site Prepare QAPP QAPP Approved Prepare TER Receive GULD Evaluate Site Field Evaluation 11 11

12 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 12 12

13 BMP Selection Dept of Ecology Approved MTDs (TSS removal) 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 13

14 The TAPE Protocol 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 14 14

15 The TAPE Protocol What Does TAPE Monitoring Look Like? 15

16 The TAPE Protocol Continuous Flow Monitoring Collect flow-weighted composite samples 16

17 The TAPE Protocol Rigorous Acceptance Criteria 17

18 The TAPE Protocol Rigorous Acceptance Criteria 18

19 The TAPE Protocol Parameters 19

20 The TAPE Protocol 20

21 The TAPE Protocol Q Storm volume = 1300 cf Pacing = 100 cf Samples = 13 Coverage = 100 % Time MP8 IN y = 3E-05x R 2 = Storm Depth (in) Influent volume (cf) 21

22 The TAPE Protocol Basic Treatment 80% removal of TSS (influent = 100 to 200 mg/l) 20 mg/l TSS effluent goal (influent <100 mg/l) Enhanced Treatment Influent dissolved copper range = 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 Phosphorus Treatment Influent total phosphorus range = mg/l 50% reduction of total phosphorus Oil Treatment Influent >10 mg/l Daily average TPH <10 mg/l Maximum TPH discrete (grab) sample <15 mg/l No visible sheen 22

23 The TAPE Protocol Performance at Specific Flow Rates Meeting performance goals must occur at 100% to get approved at your desired design flow rate 23

24 The TAPE Protocol Labor and Tech Intensive $15,000 equipment $200,000 total cost 24

25 Ship Canal Test Facility 25

26 Overview Built acre basin 22.7 acres impervious 8.9 acres roadside landscaping 1,980 gpm = 6-month storm 26

27 Four Test Bays 27

28 28

29 Draw-Pipe 29

30 Four Test Bays 30

31 Flow Splitter 31

32 Flow Splitter 32

33 Valve Splitter 33

34 Bay 1 Planview 34

35 Flow Measurement 35

36 Sample Collection 36

37 The Brains 37

38 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 38

39 Stormwater Technology Testing Center 39

40 Stormwater Technology Testing Center

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42 Source 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

43 Diversion Structure Sediment flows both ways at diversion

44 Site Design 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

45 Site Design

46 Site Design

47 Site Design