The DNREC Division of Water will hold a public hearing (Docket #2022-P-W-0008) regarding an application by Sussex County for Construction and Operations Permits for the Inland Bays Regional Wastewater Treatment Facility. Public comment period open through June 7, 2022.
Event Number: 2334 080 1424
Dial-in Number: 1-408-418-9388
Closed-captioning available by request if made at least 7 days before the event.
Sussex County Council has applied for a Construction Permit for the construction of the Phase 2 upgrade and expansion project at the Inland Bays Wastewater Treatment Facility (IBWTF) and for an Operations Permit authorizing the operation of the IBWTF, disposal activities, and use of new systems.
The County currently owns, operates, and maintains the Inland Bays Wastewater Treatment Facility (IBWTF) for the treatment and disposal of domestic wastewater from the County’s service territories. The Phase 2 upgrade and expansion project proposes to increase both the treatment and disposal capacities of the IBWTF.
Sussex County Council has applied for a State of Delaware Construction Permit for the Phase 2 upgrade and expansion project at the Inland Bays Wastewater Treatment Facility (IBWTF). The Phase 2 project’s scope includes increasing the facility’s treatment capacity from 2.0 million gallons per day (MGD) to 4.0 MGD by installation of new screening and grit removal systems, constructing two additional biological nutrient removal (BNR) Biolac aeration lagoons, constructing two new clarifiers, and upgrading/expanding existing pumps, blowers, biosolids, filtration, and irrigation pump systems.
The Phase 2 upgrades and expansion will also increase disposal capacity from 2.65 MGD to 6.96 MGD on an annual average basis by adding approximately 347.9 wetted acres on County-owned forested land. Treated wastewater will be pumped from the IBWTF effluent storage lagoons and distributed to spray fields with fixed-head sprinkler systems. The distribution system consists of 17,900-ft of 16” PVC C900 distribution lines which feed 186,960-ft of 4” PVC C900 lateral lines that connect to the sprinkler heads.
In addition, the Phase 2 upgrade and expansion project includes the construction of a constructed wetland to research and demonstrate the effectiveness of wetland systems to remediate local groundwater resources, serve as an innovative alternative to treated wastewater storage, and provide an enhanced treatment disposal option.
The construction project is to be located on the north side of County Road 306, between County Road 307 and 303, Sussex County, Delaware, Sussex County Tax Map/Parcel Numbers:2-34-22-14, 234-16.00-906.00, 234-21.00-171.00, 234-16.00-28.03, 234-16.00-28.00, 234-16.00-23.00, 234-16.00-21.01.
Sussex County Council is currently authorized to operate and maintain an on-site wastewater treatment and disposal system (OWTDS) known as the Inland Bays Wastewater Treatment Facility (IBWTF). The IBWTF receives and treats domestic wastewater from the County’s service territories and the facility consists of headworks with screening and grit removal systems, two Biolac aeration lagoons for biological nutrient removal (BNR), two clarifiers, biosolids handling, storage, and dewatering facilities, a chlorine contact tank for disinfection, and two effluent storage lagoons. Up to 2.65 MGD of treated wastewater is discharged to 432.5 acres of agricultural fields via eight center pivot spray irrigation systems. This Phase 1 project is operating in accordance with the County’s State of Delaware OWTDS Operations Permit No. 359141-05.
Sussex County Council has applied to renew their State of Delaware OWTDS Operations Permit for Phase 1 operations and to authorize the operation of the Phase 2 project’s newly constructed wastewater treatment, distributions, and disposal systems. The Phase 2 projects will increase the IBWTF’s treatment capacity from 2.0 to 4.0 MGD and disposal capacity from 2.65 to 6.96 MGD. The permit will also authorize the use of the constructed wetland to treated groundwater and enhance effluent treatment as a demonstration and research project.
The proposed Draft Construction and Operations Permits include construction, operational, monitoring, and reporting requirements designed to protect human health and the environment.
For additional information on the above matter, and to review applications, supporting documents, and draft permits, contact John Rebar, Jr., Division of Water, Groundwater Discharges Section, 89 Kings Highway, Dover, DE, 19901; by phone at 302-739-9948; or, by email, at John.Rebar@delaware.gov.
The Department will accept public comment through the close of business on June 7, 2022. Comments will be accepted in written form via email to DNRECHearingComments@delaware.gov, using the online form at de.gov/dnreccomments, or by U.S. mail to the address below.
Lisa A. Vest
DNREC Office of the Secretary
89 Kings Highway
Dover, DE 19901
Exhibit 1: On-Site Regulations and Guidance Documents (Jan. 11, 2014)
Sussex County Application for Phase 2 Upgrades
Exhibit 2: Soil Investigation Report (SIR) for the proposed Inland Bays Spray Expansion Project. Prepared by Accent Environmental, LLC. With revisions dated May 2017.
Exhibit 3: Hydrogeologic Report for Spray Irrigation Expansion at the Inland Bays Regional Wastewater Facilities in Sussex County, Delaware (HSR) Prepared by: Whitman, Requardt & Associates, LLP
Exhibit 4: 2019 Surface Water Assessment Report (SWAR), Inland Bays Regional Wastewater Facilities Sussex County, Delaware, dated January 28, 2019. Prepared by: Whitman, Requardt & Associates, LLP.
Exhibit 5: Revised Submittal from WRA providing Updated Drawings, Specs and Design Engineering Report (DER)
Exhibit 7: Revised Submittal
Sussex County’s Application for Renewal of Operations Permit
Exhibit 8: Application for Renewal and 5 year Compliance Monitoring Report (CMR) (May 12, 2017)
Sussex County’s Application for the Constructed Wetland Project
Exhibit 9: Hydrogeologic Report and Appendices titled Inland Bays Regional Wastewater Facility – Hydrogeologic Report In Support of the Submerged Gravel Wetland Project as an Alternative Effluent Disposal System. Prepared by RK&K. (Jan. 28, 2022)
Exhibit 10: Drawings titled Inland Bays Regional Wastewater Facility Submerged Gravel Wetland. (April 18, 2022)
Sussex County’s Application for the Distribution of Treated Wastewater for Agricultural Use
Exhibit 11: Permit Application for the Distribution of Treated Wastewater for Agricultural Use, Inland Bays Regional Wastewater Facilities in Sussex County, Delaware. Prepared by: Whitman Requardt & Associates, LLP. (Feb. 24, 2021)
Exhibit 12: Drawings titled Inland Bays Regional Wastewater Facility (IBRWF): Effluent Disposal Expansion. Signed Dec. 9, 2020
Exhibit 15: DNREC Draft Construction Permit
DNREC Public Notices
Exhibit 17: Notice of the Public Hearing as published on the State Public Meeting Calendar on April 19, 2022
Exhibit 18: DNREC Public Hearing Event Page (this page)
Exhibit 19: Notice of the public hearing as published on the DNREC Public Notices page on April 20, 2022
Exhibit 20: Copy of the Public Hearing Notice as published in the Delaware State News on April 20, 2022
Exhibit 21: Copy of the Public Hearing Notice as published in News Journal on April 20, 2022
DNREC Existing Sussex County Inland Bays Permit
Exhibit 22: DNREC Operations Permit – 359141-05
Exhibit 23: DNREC Presentation
Exhibit 1: Sussex County Presentation
Diane Longo (5/10/22)