complete drainage report rev 9

ie) State of New Jersey DEPARTMENT OF ENVIRONMENTAL PROTECTION DIVISION OF WATER QUALITY Bureau of Stormwater Permitting 401 East State Street JI PHILIP D. MURPHY : SHAWN M. LATOURETTE Governor P.O. Box 420 Mail Code 401-02B Acting Commissioner Trenton, NJ 08625-0420 SHEILA Y. OLIVER Tel. (609) 633-7021 * Fax (609) 777-0432 www.nj.gov/dep/dwa/bnpc_home.htm Lt. Governor February 12, 2021 Derek M. Berg Director — Stormwater Regulatory Management - East Contech Engineered Solutions LLC 71 US Route 1, Suite F Scarborough, ME 04074 Re: MTD Lab Certification Filterra® HC Bioretention System Off-line Installation Approved TSS Removal Rate 80% Dear Mr. Berg: The Stormwater Management rules under N.J.A.C. 7:8-5.5(b) and 5.7(c) allow the use of manufactured treatment devices (MTDs) for compliance with the design and performance standards at N.J.A.C. 7:8-5 if the pollutant removal rates have been verified by the New Jersey Corporation for Advanced Technology (NJCAT) and have been certified by the New Jersey Department of Environmental Protection (NJDEP). Contech Engineered Solutions LLC has requested a Laboratory Certification for the Filterra® HC Bioretention System (Filterra® HC.) The project falls under the “Procedure for Obtaining Verification of a Stormwater Manufactured Treatment Device from New Jersey Corporation for Advance Technology” dated January 25, 2013. The applicable protocol is the “New Jersey Department of Environmental Protection Laboratory Protocol to Assess Total Suspended Solids Removal by a Filtration Manufactured Treatment Device” dated January 25, 2013. NIJCAT verification documents submitted to the NJDEP indicate that the requirements of the aforementioned protocol have been met or exceeded. The NJCAT letter also included a recommended certification TSS removal rate and the required maintenance plan. The NJCAT Verification Report with the Verification Appendix (dated January 2021) for this device is published online at http://www.njcat.org/uploads/newDocs/NJCATFilterraTechnology VerificationReportFinal._.pdf. New Jersey is an Equal Opportunity Employer. Printed on Recycled Paper and Recyclable.