raising the bar north of the border: the ins and outs of canada’s new evaluation process for...

© 2015 Contech Engineered Solutions LLC

Raising the Bar North of the Border: The Ins and Outs of Canada’s New

Evaluation Process for Oil-Grit Separators

Presented by:

Derek Berg

StormCon Austin

August, 5th 2015

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Stakeholder driven protocol development and regulatory overview

CETV protocol specifics CETV protocol in practice, testing a full scale CDS®

Discussion

Presentation Overview

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BMP evaluation has come a long way but remains imperfect Equipment, methods and best practices continue to be refined Merits of lab vs. field still debated Resource constraints straining existing programs Consistent implementation is essential

BMP Evaluation

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Canadian regulatory framework requires predominantly local decision making and vetting of MTDs

Historically no Canadian specific protocols or evaluation programs for MTDs

Local decision makers often lack resources and/or expertise to complete evaluations

Some regions relying on programs such as NJCAT/NJDEP but data from those programs not always well suited for direct adoption

Drivers for a CETV Protocol

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In 2013 Toronto and Region Conservation Authority (TRCA) convened a diverse stakeholder group to gauge interest and establish goals for a national protocol

Group agreed to use 2013 NJDEP protocol as a foundation for the process

Changes needed to make resulting data applicable to diverse local regulations

Stakeholders wanted a protocol that yielded a flexible data set After initial stakeholder meeting TRCA took lead on drafting

protocol with several rounds of stakeholder review

CETV Development

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Mandatory performance trials at 7 operating rates ranging from 40 l/min/m2 to 1400 l/min/m2 of sedimentation areao Additional tests optionalo All testing using modified mass balance with target influent of 200mg/l

PSD analysis on source sediment as well as sediment captured during each test run

Scour test component with system filled to 50% sediment capacityo Uses 1-1000um PSD for scouro 5 target loading rates between 200-2600 l/min/m2 of sedimentation areao Duplicate effluent and PSD samples collected at each operating rate

Voluntary light liquid re-entrainment testo A scour test for floatableso Low density polyethylene beads used to simulate oils

CETV Protocol Specifics

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All testing, reporting and data submission must be completed by 3rd party facility

SSC method specified for all solids analysis Specifies NJDEP 1-1000um PSD

o D50 ~65 micronso ~20% of material less than 8 microns

CETV Protocol Specifics

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CETV Process Overview

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Application

Test at 3rd Party

Facility

Submission of Results

Establish Performance Claim

Review by Verification Entity

CETV Verification

Environment Canada

Globe Performance Solutions

Manufacturer/3r

d

Party Lab

Toronto and Region Conservation Authority

Regional/Local Regulatory Authority

Stakeholders:


2014: CDS-4 tested at Alden Research Labs in Holden, MA

CETV in Practice

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Initial PSD tolerances and sampling requirements made sediment compliance difficulto + or – 3% tolerances changed to + or – 6%

Mass balance approach results in lengthy run times at low operating rateso Min 11.3kg sediment per trialo CDS trial at 40 l/min/m2 was 21.4 hourso Test run in 3 chunks over 3 days

PSD sampling before each test run adds appreciable cost and increases likelihood of non compliance

Lessons Learned

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Protocol is robust and has been proven feasible to implement Protocol and process require substantial financial investment Protocol implementation could be improved with tweaks to test

requirements CDS in early stages of CETV verification process Process creates a substantial amount of data but there is little

guidance for using data at local levelo Ideally policy or guidance on use of results should be created to aid local

users and drive consistency

Consistent implementation of verification process and local regulatory policy will be critical to success of program

Discussion

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Questions

Derek Berg

[email protected]

207-885-6174

Thank You!!

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mailto:[email protected]

raising the bar north of the border: the ins and outs of canada’s new evaluation process for...

Environment

scour o

njdep protocol

oils cetv protocol specifics

microns o

drafting protocol

entrainment test o

ma cetv

sediment capacity o