Given our small size, the ONE team is unique in our ability to provide a wide range of services. This is accomplished through a strong team of professionals and an entrepreneurial work force. View some of our featured projects below:
Land Water WasteDue Diligence for 125,000+ acres of ForestlandONE completed ASTM E2247 Phase I due diligence across 125,000+ acres of Virginia forestland, uncovering legacy site features and overseeing UST closure.Virginia
Transactional & Development ServicesEnvironmental Due Diligence Technical OversightONE provided independent technical oversight and Phase II ESA review to support a hotel property acquisition in Washington, D.C.Washington, D.C.
Land Water WasteFederal UST Closure Project – VirginiaONE managed removal and closure of six USTs across two remote National Park sites for the U.S. Department of the Interior in Virginia.Virginia
Land Water WasteFredericksburg EPA Brownfields Assessment GrantONE managed a $400K EPA Brownfields Assessment Grant, completing Phase I/II ESAs across 46+ acres for the City of Fredericksburg, VA.Virginia
Land Water WasteIn Situ Chemical Oxidation Project – FloridaONE achieved a 90% reduction in ETU groundwater mass via targeted ISCO at a remote Florida wildlife area, without electrical infrastructure.Florida
Land Water WasteLagoon Sludge Volume Assessment & Characterization – Wood Products Mill, NCONE quantified sludge volume and confirmed land-application-ready chemistry for two wastewater lagoons at a NC wood products mill.North Carolina
Transactional & Development ServicesLimited Phase II Site InvestigationPhase II investigation clears former asphalt-plant REC at Virginia retail center, confirming no further action neededSouthwestern Virginia
Transactional & Development ServicesLimited Phase II Site Investigation – Proposed Solar Farm, VAONE completed a Phase II Environmental Site Assessment (ESA) supporting the development of a proposed utility-scale solar energy facility in VirginiaVirginia
Land Water WasteLNAPL Remediation ProjectONE guided a decades-old Virginia LNAPL/UST site to DEQ 'No Further Action' closure after prior efforts exhausted a $1M state remediation fund.Virginia
Land Water WasteNC Brownfields Redevelopment Support – Petroleum Refining and Process/Distribution Property, Charlotte, NCONE oversaw soil management and closed out NC Brownfields redevelopment of a former Charlotte petroleum refining site.North Carolina
Land Water WasteNew Wastewater Analysis Method Saves Money and Ensures Regulatory ComplianceONE developed a novel Grit in Wastewater analytical method that overturned inaccurate permit test results and avoided a $150,000 penalty.
Land Water WasteNPDES Wastewater Treatment System ORC ServicesONE provides certified ORC services for a Grade I physical/chemical dewatering treatment system under an NPDES individual permitPiedmont North Carolina
Land Water WastePCB Source Area Delineation and TSCA Closure – Former Transformer Facility, OhioONE Environmental delineated a legacy PCB source area and guided an Ohio industrial facility through USEPA self-implementing and risk-based TSCA closure.Ohio
Land Water WastePetroleum Cut-Off Wall InstallationONE designed and installed a petroleum cut-off wall to stop a historic diesel plume from reaching a major Virginia river while preserving groundwater recharge.Virginia
Transactional & Development ServicesPhase I Environmental Site AssessmentsASTM E1527-21 Phase I ESAs for a 15-property media/broadcast portfolio spanning five statesmisc, misc
Land Water WasteRCRA Closure Projects – VirginiaONE guided multiple RCRA Part B permitted facilities across Virginia through hazardous waste unit closure, from plan drafting to post-closure transition.Virginia
Land Water WasteRCRA Corrective Action Project Closed Industrial Landfill Site – OhioONE guided a stalled CVOC groundwater plume at a former Navy depot/industrial landfill toward a sustainable MNA and phytoremediation remedy.Ohio
Land Water WasteRCRA PermittingONE provides full-spectrum RCRA compliance support, from waste determination and audits to corrective action and facility closure.
Health and SafetyRedevelopment and Housing AuthorityONE delivered Phase I/II ESAs and hazardous materials assessments for housing authorities, supporting HUD-compliant renovation financing.
Land Water WasteStormwater Basin RehabilitationONE rehabilitated a 30+ year-old stormwater basin for a Virginia HOA, removing 1,000 CY of sediment and restoring capacity on time and on budget.Virginia
Land Water WasteSuperfund Project Former Burn Pit – VirginiaONE manages pilot bioremediation and long-term groundwater monitoring at a Virginia NPL Superfund site with a mixed CVOC/petroleum plume.Virginia
Land Water WasteUST Closure – Former American Furniture Plant #10 / Lester Street Warehouse, Martinsville, VAONE Environmental closes a 40,000-gallon unregistered diesel UST at a Martinsville, VA redevelopment site with no residual soil impactsVirginia
Land Water WasteVoluntary Remediation ProgramONE navigated Virginia DEQ's Voluntary Remediation Program to secure a transferable cleanup certificate for a former dry-cleaning site in under a year.VirginiaNo case studies match those filters.
