Prior-Approved List of Hydrodynamic Devices

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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.

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.

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:

Calculate the treatment volume to the device (TvBMP). The calculated TvBMP can be obtained from the Virginia Runoff Reduction Method (VRRM) spreadsheets.
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.
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).

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:

Item 1: MTD Registration
Item 2: ETV Report

Hydrodynamic Devices Awarded 20% TP Removal Efficiency

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

BaySeparator™

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

First Defense

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

For Regulatory Matters:

Chris French
94 Hutchins Dr
Portland, ME 04102
Mobile: 804-466-2099
Email: cfrench@hydro-int.com

For Project Specific Questions:

Will Hall
94 Hutchins Dr
Portland, ME 04102
Phone: 770-380-7749
Email: whall@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 the contacts above.)
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

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

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:

Item 1: Cover Letter
Item 2: MTD Registration
Item 3: NJCAT Verification Report
Item 4: NJDEP Certification Letter
Item 5: Operations and Maintenance Manual
Item 6: Brochure

Nutrient Separating Baffle Box®

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

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

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

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

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

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)

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

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

Virginia DEQ

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Prior-Approved List of Hydrodynamic Devices

DEQ Evaluations

Sizing Information

Hydrodynamic Devices Awarded 20% TP Removal Efficiency