New Jersey Area
- Long Term Control Plan (LTCP) for the City of Paterson, Borough of East Newark, and Town of Harrison*
- LTCP for the Borough of Fort Lee*
- LTCP for CSO Control in the PVSC System*
New York City and NJ-NY Harbor
- NYC Green Infrastructure (GI) planning and implementation support including modeling, prioritization and permitting.
- LTCP evaluations including modeling, alternatives analysis, and use attainability.
- Beach and NY-NJ harbor water quality assessments and advisories
- Watershed characteristics support for Newtown Creek and Gowanus Canal superfund projects
- Reconfiguration of Regulator 9 in Tallman Island Drainage Area in New York City*
- Pathogen TMDL Development in NY-NJ Harbor for EPA Region 2*
- Pathogen TMDL Development for New York State*
- Decision Support System to Support Nitrogen Reductions from Non-point Pollution Sources in Long Island Sound*
Other Regional and National CSO, Stormwater and Water Quality
- Watershed Planning in Westchester County, NY*
- Watershed Restoration Planning in Upper Patuxent and Mattawoman Creek Watersheds in Prince George’s County, MD
- Sanitary Sewer Overflow Control (SSO) for the City of Baltimore, MD*
- SSO Control in New Castle County, DE*
- Stormwater Management for James Madison University Campus, Harrisonburg, VA*
- Long-term CSO control for the Disrict of Columbia
- Watershed Modeling in Alcovy River Basin, GA*
- LTCP for the City of Edmonton, Canada*
- LTCP for the City of Winnipeg, Canada*
* Work was performed during previous employments with several engineering firms.
Development of preliminary design options (involving deep tunnels, offline storage tanks, reconfiguration of regulators, and selective upsizing of combined and interceptor sewers) to minimize combined sewer overflows (CSOs) to the Passaic River and also to maximize wet weather flow to the Passaic Valley Sewerage Commission (PVSC) treatment plant to achieve the end-of-pipe control objectives specified by the NJ Department of Environmental Protection (NJDEP) as part of the Phase 2 general permit.
Development of a comprehensive sewer system model to characterize the existing system performance. Designed the flow and water quality monitoring program and led the enumeration and data analysis tasks to facilitate model calibration. Developed preliminary design options (involving deep tunnels, offline storage tanks, reconfiguration of regulators, and selective upsizing of combined and interceptor sewers) to minimize CSOs to the Hudson River and also to maximize wet weather flow to the Bergen County UA to achieve the NJDEP end-of-pipe control objectives. For the two outfalls, conceptualized the pre-treatment and disinfection technologies (chlorination/ dechlorination, UV, screening, fuzzy filters, etc.) to achieve the NJDEP pathogen control objectives.
Development of a comprehensive InfoWorks model of the interceptor and regulators in the five major combined sewered municipalities tributary to the PVSC interceptors. Also characterized the inflow/infiltration from more than 40 municipalities that contribute sanitary flows to the interceptors. Hydraulic design evaluations were performed to identify the bottlenecks and determine upgrades necessary to enhance the conveyance capacity to 2X, 4X, 6X and 8-times the peak dry weather flow rate along the interceptor sewers and eventually to the treatment plant. Also conducted preliminary designs associated with BMPs such as reduction of inflow and infiltration to achieve the NJDEP’s long-term CSO control targets. Performed the pollutant load reduction calculations to quantify the benefits associated with each level of sewer upgrade.
Provided strategic support to the Bureau of Environmental Planning and Assessment (BEPA) and the Office of Green Infrastructure (OGI) in various tasks pertinent to GI planning and implementation. Specifically, the calculation of managed impervious areas based on projects included in the web-based GI projects database, determination of feasible levels of GI penetration in various WWTP service areas and prioritization of subwatersheds where OGI can focus the design efforts on, early evaluation of asset management tools that led to the visioning for PTAMS, modeling of retention and detention GI practices in InfoWorks CS to evaluate the performance of GI penetration rates on a citywide basis, performance evaluation of GI at site and neighborhood scales, provision of guidance on research and development needs, and support on public outreach through steering committee initiatives.
Provided strategic support to BEPA and the Bureau of Wastewater Treatment in the LTCP for Alley Creek and Little Neck Bay, Hutchinson River, Coney Island Creek, Westchester Creek, and Gowanus Canal. Specific responsibilities included field reconnaissance to assess watershed/water quality conditions, guidance on data gaps and additional data needs, hydrologic/hydraulic/pollutant load modeling for both existing conditions and alternatives to assess their benefits, critical review of information developed by other consultants, support on the use attainability evaluations, and review and revision of LTCP documents based on technical and legal review from DEP for Alley Creek and Little Neck Bay. Supported the public outreach efforts for citywide LTCP efforts and also specifically for Alley Creek and Little Neck Bay.
Provided strategic support to BEPA and the NYC Department of Health and Mental Hygiene in the statistical analysis of beach and harbor survey program’s water quality data and updating of advisory thresholds for various beaches and waterways. Also assisted in the development of a comprehensive work plan for a real-time advisory system. Provided critical review and guidance on the potential impacts of 2012 USEPA recreational water quality criteria on the closure and advisory decisions in various beaches and assisted in tying this to a need for water quality-driven integrated planning approach for DEP.
Providing strategic support to the BEPA Superfund program. Specific responsibilities include supporting of field reconnaissance and inspection efforts in the selection of CSO/MS4 outfalls for water quality monitoring, performing watershed modeling efforts to develop and provide information to DEP’s technical and legal staff, and supporting DEP in technical/legal discussions pertinent to City’s infrastructure and monitoring/modeling needs.
Development of a hydraulic model of this drainage area in XP-SWMM to assess the potential for Regulator 9 for overflowing during the dewatering of Flushing Creek retention facility after the rain events. Designed an extensive flow monitoring program to support the localized hydraulic model calibration. Also designed conceptual alternatives involving regulator reconfiguration and chamber cleaning to facilitate reductions in CSOs from this regulator. Also assisted in a parallel evaluation of capacity analysis using a basic computational fluid dynamics (CFD) model.
Development of the watershed models for drainage areas tributary to creeks and rivers in the New York-New Jersey Harbor that contribute CSOs and stormwater to facilitate the TMDL development process. Reviewed the design elements of individual NYC and NJ municipalities’ sewer systems and conceptualized their hydraulic capacities, and integrated into an area-wide flow and load assessment tool. In addition to Pathogen TMDLs, these area-wide models are currently being used to support the toxics and nutrient TMDL efforts in the Harbor.
Design of a generic protocol for Pathogen TMDL development in New York State. Applied the protocol to develop TMDLs for the Oyster Bay Harbor (using the EPA SWMM and Center for Watershed Protection’s Watershed Treatment Model) and Flanders Bay (using EPA SWMM, EPA HSPF, and HydroQual’s ECOM and RCA models) to protect the designated use of shellfish harvesting in these water bodies. Applied the roll-back statistical procedure to develop load allocations for contributing pollutant sources.
Tasks included a thorough review of BMPs and their performances for nitrogen load reductions, analysis of urban and rural non-point sources of pollution in the watersheds contributing nitrogen to Long Island Sound from the States of Connecticut and New York using an ArcView based Generalized Watershed Loading Functions (AVGWLF) model, and implementation of a decision support system to help the state and local watershed agencies in developing technically-sound and cost-effective nitrogen reduction strategies.
Developed a comprehensive watershed model and a framework for green infrastructure screening, selection and conceptual design for all municipalities within Westchester County. Subsequent to a major flooding event that overwhelmed the County’s stormwater conveyance system and transportation corridors, the County initiated this flood mitigation study that focused on reducing the impacts of major flooding events and also improve water quality to meet the requirements of Long Island Sound TMDL, through green infrastructure. Water quality parameters including TSS, total phosphorus, total nitrogen and pathogenic organisms were assessed for baseline conditions, and the benefits of green infrastructure were evaluated in terms of reductions in these pollutant loads. Three conceptual designs were developed for grant funding solicitation and two of those were successfully funded and are being implemented now.
Currently developing watershed restoration plans for the above two watersheds. Specifically the project involves a thorough review of approved TMDL documents prepared by MDE for the above watersheds and the Chesapeake Bay TMDL as applicable, GIS analyses to characterize the watersheds and model using the Watershed Treatment Model developed by CWP, extensive review and analysis of water quality data to assess spatial and temporal trends in water quality over time, prioritization of subwatersheds for restoration, and development of the restoration plans for the county and municipalities for implementation to meet the wasteload allocations for MS4 areas for applicable water quality parameters including TSS, Total Phosphorus, Total Nitrogen, and Fecal Coliforms. Restoration focuses initially on non-structural practices and retrofitting of existing stormwater controls, and incrementally adding ESDs in the right-of-way, public on-site, and then the private on-site to achieve the wasteload allocations.
Development of a comprehensive sewer system model (InfoWorks) and data management program (Sliicer to determine component inflow/infiltration sources) to support the consent-decree driven SSO elimination project in the High Level Sewershed. With the City of Baltimore and the prime consultant in Baltimore, worked on the design of a flow monitoring program and subsequent calibration and verification of the model to support this challenging study. Also developing preliminary SSO control options involving sewer lining, upsizing, selective cleaning and rehabilitation.
Development of a sewer system model (XP-SWMM) and design of flow monitoring program to support model development for identification of various sources of inflow and infiltration including groundwater, roofleader and sump-pump connections, and poor grading/rising stream water level near manholes that lead to inflows. Currently conceptualizing preliminary design alternatives including rehabilitation and daylighting of streams to eliminate inflows from sewer systems to mitigate SSOs for a range of design storms in the Mill Creek sewershed.
Development of a comprehensive mathematical model of the JMU campus consisting of an XP-SWMM model to predict stormwater flows and sewer routing and a 2D TUFLOW model to characterize surface flooding once the sewers are surcharged. For various design storms, the campus-wide flooding was assessed and hotspots were identified, and compared with historical data to use the model for design-level analyses. Provided technology transfer on model usage and also for evaluation of Low Impact Development or Best Management Practices. Several scenarios involving preliminary-design of additional relief sewers and detention/retention ponds were performed to relief flooding.
Development and application of combined and separate storm sewer models using MOUSE and EPA SWMM. Supported the design of flow and water quality monitoring programs, and then led the calibration and verification efforts. The models were then applied to facilitate the design of CSO control elements including BMP (green roofs, inflow reductions) screening, deep tunnels, pump station/sewer rehabilitations, and real-time controls using inflatable dams to increase inline storage in large combined sewers. Also coordinated the project tasks with minority sub-consultants and performed technical quality control.
Hydrologic model calibration of BASINS/ NPSM for characterizing the existing flow and pollution load conditions from contributing landuses. Also supported evaluation of the impacts of future developments on bacteria, sediments, and quality in the basin.
Under three separate contracts, (1) assessed the existing impacts of stormwater and CSOs using WASP and customized models, (2) studied the impacts of City’s pollutant discharges on downstream uses such as water supply, recreation and agriculture, and assessed potential health risk, and (3) developed and evaluated long-term control strategies and estimated the costs.
Under two contracts, (1) studied the impacts of stormwater and CSOs using SWMM and WASP, and evaluated the long-term control strategies, and (2) developed and calibrated 2-dimensional analytical models to study the mixing of effluent plumes, which was the basis for design of UV-disinfection at the Southend Plant.