Prior-Approved List of Hydrodynamic Devices

In accordance with 9VAC25-870-65 D, the manufactured treatment devices (MTDs), also known as proprietary BMPs, listed on this page may NOT be used to meet the water quality design criteria in any stormwater management plan submitted on or after January 1, 2022.

These devices can be used to meet the total phosphorus (TP) water quality requirements of Virginia Stormwater Management Program (VSMP) regulation for plans submitted before January 1, 2022.* Under these circumstances, the assigned Event Mean Concentration (EMC) percent TP removal efficiency may be manually added into the Virginia Runoff Reduction Method (VRRM) spreadsheets to demonstrate water quality compliance.

*DEQ does not endorse any device and does not provide assistance with device selection.

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BACKGROUND

DEQ Evaluations

For each MTD listed on this page, the following information is provided:

    • Letters from DEQ
    • Web link to view specifications and other product information
    • Vendor contact information
    • Information reviewed by DEQ.

    If you have questions regarding an evaluation, please contact DEQ’s Robert Cooper, P.E., at Robert.Cooper@deq.virginia.gov or 804-698-4033.

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Sizing Information

To obtain the water quality credit assigned to a manufactured treatment device (MTD), the device must be properly sized. The MTD vendor and design professional are responsible for properly sizing a specific device for a given project.

DEQ recommends that designers and reviewers contact the MTD vendor for specific information regarding the type and size of device needed for each specific project.

To determine the MTD size needed for a project:

    1. Calculate the treatment volume to the device (TvBMP). The calculated TvBMP can be obtained from the Virginia Runoff Reduction Method (VRRM) spreadsheets.
    2. Calculate the peak discharge of the obtained treatment volume (qpTv). DEQ’s preferred method to calculate the peak discharge for a BMP drainage area is described here.
    3. Work with the MTD vendor to ensure that the obtained peak discharge to the device (qpTv) is less than or equal to the maximum treatment flow rate (MTFR) of the device (qpTv < MTFR).

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HYDRODYNAMIC DEVICES AWARDED 25% TP REMOVAL EFFICIENCY

CrystalClean Separator-Single Vault
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (June 29, 2015) for use with stormwater management plans submitted between June 29, 2015 and December 31, 2021.

Specifications for the MTD are available from the website:
http://crystalstream.com/.

Contact Information: CrystalStream Technologies
John Moll
2090 Sugarloaf Parkway, Suite 245
Lawrenceville, GA 30045
Phone: 800-748-6945
Fax: 770-979-6954
E-mail: johnmoll@crystalstream.com

Information reviewed by DEQ:

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HYDRODYNAMIC DEVICES AWARDED 20% TP REMOVAL EFFICIENCY

(listed alphabetically)
BaySaver Barracuda
Letter from DEQ (April 20, 2022) stating that device (as named here) is included on this prior-approved list. The device (as named here) is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. See Practice 16 for device referenced in the letter with current approval.

Approval letter from DEQ (November 8, 2017) for use with stormwater management plans submitted between November 8, 2017 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.adspipe.com/.

Contact Information: Baysaver Technologies LLC
Travis Dorman
1030 Deer Hollow Drive
Mount Airy, MD 21771
Phone: 540-526-6045
Fax: 866-802-2641
Email: travis.dorman@adspipe.com

Information reviewed by DEQ:
  • Item 1: MTD Registration
  • Item 2: NJCAT Technology Verification Report
  • Item 3: NJDEP Certification Letter

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BaySeparatorTM
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (August 14, 2014) for use with stormwater management plans submitted between August 14, 2014 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.adspipe.com/.

Contact Information: Baysaver Technologies LLC
Jim Clark, P.E.
12347 Indigo Springs Court
Bristow, VA 20136
Phone: 240-463-0124
E-mail: james.clark@adspipe.com

Information reviewed by DEQ:
  • Item 1: Cover Letter
  • Item 2: MTD Registration
    (Note: The contact information for this device has changed since submission of the MTD Registration form. Address questions to Jim Clark and use the Web address: https://www.adspipe.com/.)
  • Item 3: Schematics
  • Item 4: MDE Letter
  • Item 5: NJDEP Certification Letters
  • Item 6: Maintenance Manual
  • Item 7: NJCAT Technology Verification Report
  • Item 8: WDOE Technical Evaluation Report (Woodinville site)
  • Item 9: ETV Report

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First Defense
Letter from DEQ (April 20, 2022) stating that device (as named here) is included on this prior-approved list. The device (as named here) is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. See Practice 16 for device referenced in the letter with current approval.

Approval letter from DEQ (September 4, 2014) for use with stormwater management plans submitted between September 4, 2014 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.hydro-int.com/en.

Contact Information: Hydro International
Phillip Taylor
94 Hutchins Dr
Portland, ME 04102
Mobile: 608-358-1194
Fax number: 207-756-6212
Email: ptaylor@hydro-int.com

Information reviewed by DEQ:
  • Item 1: Cover Letter
  • Item 2: MTD Registration
    (Note: The contact information for this device has changed since submission of the MTD Registration form. Address questions to Phillip Taylor.)
  • Item 3: Fact Sheet
  • Item 4: Schematics
  • Item 5: ME DEP Letter
  • Item 6: City of Indianapolis Selection Guide
  • Item 7: ME DEP Testing Report
  • Item 8: Washout Testing Report
  • Item 9: Operation and Maintenance Manual

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Hydroguard
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (August 29, 2014) for use with stormwater management plans submitted between August 29, 2014 and December 31, 2021.

Specifications for the MTD are available from the website:
http://www.hydroworks.com/.

Contact Information: Hydroworks, LLC
Graham Bryant
257 Cox Street
Roselle, NJ 07203
Phone: 888-290-7900
Fax: 888-783-7271
Email: gbryant@hydroworks.com

Information reviewed by DEQ:
  • Item 1: Cover Letter
  • Item 2: MTD Registration
    (Note: The contact information for this device has changed since submission of the MTD Registration form. Use the contact information provided on this webpage.)
  • Item 3: Fact Sheet
  • Item 4: Warranty
  • Item 5: Alden Verification Testing Report
  • Item 6: NJCAT Technology Verification Report
  • Item 7: Letters of Approval/Certification (NJDEP; WI Department of Commerce; ConnDOT; MA STEP; City of Wichita, KS; City of Virginia Beach, VA; Montgomery County, MD; Ontario Provincial Standards, Products Management Committee)
    • Continuation of Letters of Approval/Certification (NETE – Ministry of Environment, Ontario, Canada)
  • Item 8: Operation and Maintenance Manual

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Jensen Deflective Separator (JDS)
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (March 9, 2021) for use with stormwater management plans submitted between March 9, 2021 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.jensenprecast.com/water-resources/.

Contact Information: Jensen Enterprises
Walter Stein
521 Dunn Cir
Sparks, NV 89431
Phone: (775) 352-6336
Email: wstein@jensenprecast.com

Information reviewed by DEQ:

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Nutrient Separating Baffle Box®
Letter from DEQ (April 20, 2022) stating that device (as named here) is included on this prior-approved list. The device (as named here) is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. See Practice 16 for device referenced in the letter with current approval.

Approval letter from DEQ (December 7, 2018) for use with stormwater management plans submitted between December 7, 2018 and December 31, 2021.

Specifications for the MTD are available from the website:
https://oldcastleinfrastructure.com/.

Contact Information: Oldcastle Infrastructure
Jay Holtz, P.E.
Director of Regulatory Management, Stormwater
7000 Central Parkway, Suite 800
Atlanta, GA 30328
Mobile: 971-271-0796
Email: jay.holtz@oldcastle.com

Information reviewed by DEQ:
  • Item 1: Cover Pages
  • Item 2: MTD Registration
    (Note: The contact information for this device has changed since submission of the MTD Registration form. Address questions to Jay Holtz. Page numbers mentioned in MTD Registration do not correspond to submitted document.)
  • Item 3: Request for Inclusion on Product List of Ohio DOT
  • Item 4: Document by Tom Happel, President of Suntree Technologies
  • Item 5: Sizing Chart
  • Item 6: AET Report: NJDEP Hydrodynamic Protocol Evaluation with 100 µm Particles
  • Item 7: NJCAT Verification Letter (July 2013)
  • Item 8; NJCAT Technology Verification Report (June 2013)
  • Item 9: NJCAT Technology Verification Report (October 2016)
  • Item 10: NJCAT Verification Letter (April 2016)
  • Item 11: NJDEP Certification Letter (November 2016)
  • Item 12: Operation, Maintenance, Inspection and Cleaning Manual – New Jersey
  • Item 13: AET Tech Report: Treatment Capacity Verification
  • Item 14: City of Indianapolis Letter (Marion County District Approval)
  • Item 15: Universal Engineering Sciences Field and Laboratory Reports
  • Item 16: Operation, Maintenance, Inspection and Cleaning Manual
  • Item 17: Specifications

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Stormceptor® OSR
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (August 13, 2014) for use with stormwater management plans submitted between August 13, 2014 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.conteches.com/.

Contact Information: Contech Engineered Solutions LLC
For Regulatory Matters:
Jacob Dorman
7037 Ridge Rd #350
Hanover, MD 21076
Phone: 757-374-4321
Email: jdorman@conteches.com

For Project Specific Questions:
Maryland Office
7037 Ridge Road, Suite 350
Hanover, MD 21076
Phone: 410-740-8490

Information reviewed by DEQ:
  • Item 1: MTD Registration
    (Note: The contact information for this device has changed since submission of the MTD Registration form. Use the contact information provided on this webpage.)
  • Item 2: Fact Sheet
  • Item 3: NJCAT Technology Verification Report

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Stormceptor® STC
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (August 13, 2014) for use with stormwater management plans submitted between August 13, 2014 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.conteches.com/.

Contact Information: Contech Engineered Solutions LLC
For Regulatory Matters:
Jacob Dorman
7037 Ridge Rd #350
Hanover, MD 21076
Phone: 757-374-4321
Email: jdorman@conteches.com

For Project Specific Questions:
Maryland Office
7037 Ridge Road, Suite 350
Hanover, MD 21076
Phone: 410-740-8490

Information reviewed by DEQ:
  • Item 1: MTD Registration
    (Note: The contact information for this device has changed since submission of the MTD Registration form. Use the contact information provided on this webpage.)
  • Item 2: Fact Sheet
  • Item 3: TARP Technical Sheet
  • Item 4: Testing Summary (Westwood, Mass.)
  • Item 5: Virginia Transportation Research Council Report
  • Item 6: Maintenance Fact Sheet

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StormPro
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (January 27, 2015) for use with stormwater management plans submitted between January 27, 2015 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.env21.com/.

Contact Information: Environment 21, LLC
Dino Pezzimenti
8713 Read Road/P.O. Box 55
East Pembroke, NY 14056-0055
Phone: 585-815-4714
Fax: 585-815-4715
E-mail: dino.pezzimenti@env21.com

Information reviewed by DEQ:
  • Item 1: MTD Registration
  • Item 2: Sizing Chart and Schematics
  • Item 3: NJCAT Letter
  • Item 4: NJCAT Technology Verification Report
  • Item 5: Maintenance Document

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Storm Water Quality Unit
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (August 29, 2014) for use with stormwater management plans submitted between August 29, 2014 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.adspipe.com/.

Contact Information: Advanced Drainage Systems, Inc.
Greg Spires, PE
4640 Trueman Boulevard
Hilliard, OH 43026
Phone: 614-325-0032
Email: gregory.spires@adspipe.com

Information reviewed by DEQ:
  • Item 1: MTD Registration
    (Note: The contact information for this device has changed since submission of the MTD Registration form. Address questions to Greg Spires.)
  • Item 2: UNH Field Verification Testing Report
  • Item 3: Alden Laboratory TSS Removal Test Report
  • Item 4: MASTEP Technology Review

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Terre Kleen™ Hydrodynamic Separator
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (July 9, 2014) for use with stormwater management plans submitted between July 9, 2014 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.terrehill.com/stormwater.

Contact Information: Terre Hill Concrete Products t/a Terre Hill Stormwater Systems
Gene LaManna
P.O. Box 10
Terre Hill, PA 17581
Phone: 717-445-3111
Fax: 717-445-0242
Email: glamanna@terrehill.com

Information reviewed by DEQ:
  • Item 1: MTD Registration
  • Item 2: NJDEP Certification Letter (Exhibit 1)
  • Item 3: Optional Online Installation Re-entrainment/Scour Testing Report, 2011 report (Exhibit 2)
  • Item 4: Warranty (Exhibit 3)
  • Item 5: Alden Laboratory Lab Report, 2008 report (Exhibit 4)
  • Item 6: NJCAT Technology Verification Report and Addendum Report (Exhibit 5)
  • Item 7: Maintenance Instructions (Exhibit 6)

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V2B1
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (July 9, 2014) for use with stormwater management plans submitted between July 9, 2014 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.env21.com/.

Contact Information: Environment 21, LLC
Dino Pezzimenti
8713 Read Road P.O. Box 55
East Pembroke, NY 14056-0055
Phone: 585-815-4714
Fax: 585-815-4715
E-mail: dino.pezzimenti@env21.com

Information reviewed by DEQ:
  • Item 1: MTD Registration
  • Item 2: Sizing Table and Schematic
  • Item 3: NJDEP Certification Letter
  • Item 4: NJCAT Technology Verification Report
  • Item 5: Maintenance Document

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The Vortechs® System
Letter from DEQ (April 20, 2022) stating that device is not approved to meet VSMP water quality design criteria requirements for stormwater management plans submitted on or after January 1, 2022. Approval letter from DEQ (July 9, 2014) for use with stormwater management plans submitted between July 9, 2014 and December 31, 2021.

Specifications for the MTD are available from the website:
https://www.conteches.com/.

Contact Information: Contech Engineered Solutions LLC
For Regulatory Matters:
Jacob Dorman
7037 Ridge Rd, Ste. 350
Hanover, MD 21076
Phone: 757-374-4321
Email: jacob.dorman@conteches.com

For Project Specific Questions:
Maryland Office
7037 Ridge Road, Suite 350
Hanover, MD 21076
Phone: 410-740-8490

Information reviewed by DEQ:
  • Item 1: MTD Registration
  • Item 2: NJCAT Technology Verification Report
  • Item 3: Maintenance Document

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