Clean water is essential to healthy communities, and PWGC provides the expertise to protect and manage it. Our licensed engineers and hydrogeologists deliver practical solutions for groundwater investigations, aquifer studies, water supply, treatment systems, and wastewater infrastructure, helping communities meet their water resource needs today and into the future.
Every water challenge is unique. PWGC listens first, then delivers solutions that fit. Partner with PWGC and experience the difference.
Characterization, plume delineation, modeling, remedial design and long term monitoring, from single parcels to a 5,300 acre federal research facility.
Well siting and design, VOC and PFAS treatment, pumping stations, storage and distribution for authorities, towns and villages.
Innovative alternative onsite systems, treatment plant design and upgrades, sewer extensions, and Engineer of Record services after start up.
PWGC designed and managed construction of a fast paced groundwater remediation system to intercept a large solvent plume.
PWGC is conducting the remedial investigation for PFOA and PFOS in groundwater from historic firefighting foam use.
PWGC investigated underground injection control structures and a jet fuel plume on a 58 acre former Air Force base.
PWGC ran a geophysical survey to locate buried objects, then designed and implemented potassium permanganate injection.
Groundwater does not respect property lines and rarely sits where the first sample suggests. Three things shape how our hydrogeologists work.
PWGC performs preliminary site characterization, historical records search and review, and identifies areas of concern.
We install monitoring wells, run geophysical surveys where buried structures are suspected, sample soil and groundwater to delineate the extent of impact.
Our hydrogeologists model groundwater flow and contaminant transport. Evaluate remedial alternatives on cost effectiveness and practicality. Then design the treatment system.
PWGC provides construction oversight, start up testing, operation and maintenance manuals and long term monitoring under institutional engineering controls.
Preliminary site characterization. Historical records search and review. Identification of areas of concern. Soil and groundwater sampling. Monitoring well installation. Geophysical surveys. Aquifer and pumping testing. Groundwater flow and contaminant transport modeling. Remedial investigations and feasibility studies. Interim remedial measures. Remedial action work plans and alternatives analysis. Extraction and recovery well design. Air stripping and packed tower aeration systems. Granular activated carbon treatment. In situ chemical oxidation including potassium permanganate injection. Soil vapor extraction. Treatment system mechanical, structural, electrical and controls design. Recharge basin design. Construction oversight and start up testing. Operation and maintenance manuals and support. Final engineering reports and site management plans. Institutional and engineering controls. Public outreach, community participation and Citizens Participation Plans.
Water Authority of Great Neck North, Well No. 6. PWGC fit an air stripping tower, clearwell, booster station and switchgear onto a 1,200 square foot site beside a waterfront home, inside an enclosure designed to read as a lighthouse.
PWGC sited and designed a new vertical turbine deep well with casing and a pre-cast building raised above the 100 year floodplain on helical piles.
PWGC recommended, designed and oversaw construction of a 1,400 gallon per minute well in the Community Drive Well Field.
The most expensive answer is not always the right one, and the right one depends on the aquifer, the regulator and the site. Three things shape how our engineers work.
PWGC assesses the existing system, distribution, wells, pump stations, treatment, storage tanks and back up power. Then analyzes projects water demand against it.
We review driller’s logs, gamma logging and USGS monitoring well data. Assess aquifer formation and soil lithology to place a well where yield and water quality are best.
PWGC designs wells, treatment, pumping stations and distribution to NYSDOH, county health department, AWWA and Ten State Standards. Prepares the engineering reports and applications that secure approval.
We provide construction oversight and administration, shop drawing and submittal review, as-built drawings, disinfection, plant start up and operator training.
Analysis and projection of water demand. Capital and operational long range planning. Water rate and connection charge studies. Design of wells, water supply sources, treatment systems, pumping stations, transmission and distribution systems and storage tanks. Groundwater and surface water modeling. Analysis and prediction of water quality problems. VOC treatment including air stripping and granular activated carbon. PFAS point of entry treatment system design, installation oversight and scheduled sampling. Well rehabilitation and abandonment specifications. Water main rehabilitation and replacement. Fire hydrant and service design. Hydro-pneumatic tanks, reduced pressure zone assemblies and chlorination systems. Negotiation of water quality sampling plans. Corrosion control studies including Lead and Copper monitoring compliance. Water conservation planning. Construction phase services. Plant start up and operator training. Electronic utility management services and GIS mapping.
PWGC designed an innovative onsite treatment system to replace outdated sewage disposal for Suffolk County, unveiled Memorial Day Weekend 2016 and in use since.
PWGC designed a 30,000 gallon per day treatment plant and the site around it, including the pre-cast masonry structure that houses it.
PWGC is designing wastewater collection and treatment for the greater Sayville region, tying into Suffolk County Sewer District No. 3.
PWGC redirected treatment plant effluent away from the Peconic River to four new recharge basins, with tertiary filtration added.
On Long Island, where treated effluent goes matters as much as how it is treated. Three things shape how our engineers work.
PWGC performs field investigation of existing conditions, feasibility site evaluation and samples existing sewage disposal structures for abandonment in accordance with Health Services regulations.
We prepare the engineering report and design plans for county health department submission, address comments through approval and produce technical specifications and budget estimates.
PWGC prepares design and proposal documents, answers contractor questions, issues addenda, attends the bid opening, reviews shop drawings. Performs construction inspections, prepares as-built plans and engineering certifications.
As Engineer of Record we make plant visits, review and submit discharge monitoring reports. Support operations, maintenance, attend board meetings and regulatory inspections.
Wastewater treatment plant design. Innovative alternative onsite wastewater treatment systems. Sewage treatment plant upgrades, retrofits and modifications. Sewer feasibility studies and district formation support. Wastewater collection system design and sewer extensions. Groundwater recharge basin design. Tertiary filtration system evaluation and design. Flow monitoring stations and system controls. Hydrogeologic analysis and 3D groundwater flow and transport modeling. Demolition plan design and sequencing of existing discharge and monitoring equipment. Electrical design including arc flash and lightning protection analyses and standby power. Construction cost estimating and scheduling. County health department submission, approvals and permitting. NYSDEC letters of non-jurisdiction. Storm water pollution prevention compliance. Bid documents and bid phase services. Construction inspection, as-built plans and engineering certifications. Engineer of Record services, discharge monitoring reports, operations and maintenance support. GIS database development for sanitary sewer conveyance infrastructure. Public meetings and municipal board presentations.
