Permitting and Reporting:

Hazardous Waste Disposal Permitting
Ground Water Discharge Permitting
UST Removal Permitting
Landfill Permitting

Management:

Cost Benefit Analysis
Sampling and Analysis Plan (SAP)
Emergency Response Plan
Groundwater Management Plan
Hazardous Materials Management Plan
Integrated Contingency Plan
Quality Assurance Project Plan (QAPP)
Waste Characterization Plan
Spill Prevention, Control, and Countermeasure Plan (SPCC)
Health and Safety Plan
Brownfield Plan
Expert Legal Testimony
Source Protection Plans (SPP)
Third Party Claim Evaluation
Landfill Post Closure Plan and Certification

Site Investigation:

Phase I Environmental Site Assessment (ESA)
Phase II Subsurface Investigation
Contaminant Delineation
Contaminant Fate and Transport Modeling
Geologic and Hydrogeologic Investigation
Corrective Action Feasibility Investigation (CAFI)
Corrective Action Plan (CAP)
Remedial Design Investigation
Geophysical Surveying
Risk Assessment
Soil Gas Surveying
UST Assessment and Closure
Landfill Assessment and Leachate Investigation
Landfill Well Monitoring Program
Brownfield Redevelopment

Pilot Tests:

Soil Vapor Extraction (SVE) Test
Multi-phase Extraction (MPE) Test
Air Sparge Test
Aquifer Performance/Pump Test
In-situ Chemical Oxidation (ISCO) Test
In-situ Submerged Oxygen Curtain (iSOC®) Test
Oxygen Release Compound (ORC®) Test
Bioremediation Test

Remedial Capabilities:

Renewable Energy Remedial Evaluation
Contaminated Soil Excavation and Disposal
Remediation Engineering and Treatment Design
Free-product Abatement
Monitored Natural Attenuation (MNA)
Bioremediation/Bioventing
Landtreatment
Ground Water Pump and Treat
SVE
MPE
Air Sparge
ISCO
Permeable Treatment Barrier
ISOC®
Granular Activated Carbon Filtration
Ground Water Containment Barrier
Point of Entry Treatment System Installation (POET)
Remediation System Construction Oversight
Quarterly and Annual Monitoring/Sampling Event
Operations and Maintenance (O&M)
System Performance Monitoring and Reporting
Closure/Site Management Activity Completed (SMAC)

Solid and Hazardous Waste Management Services:

Regulatory Compliance Audit
Hazardous Management Plan
Hazardous Waste Site Monitoring
RCRA Closure
Waste Characterization/Classification

Wastewater Services:

Site & Soil Evaluation
Hydrologic Evaluation
Hydraulic Mounding Calculations
Disposal System Design & Permitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Single Family Residential Property
Burlington, Vermont

LAG performed a Phase I Environmental Site Assessment (ESA) at a single family residential housing property in Burlington, Vermont. The investigation was carried out for the Community and Economic Development Office (CEDO) under the Vermont Department of Environmental Conservation (VTDEC) Brownfield’s program. During the Phase I ESA, LAG identified moldy surfaces, asbestos containing materials (ACMs), and nearby potential sources of petroleum and chlorinated solvent contamination. The neighboring recognized environmental conditions (RECs) were discovered through historical Sanborn Fire Insurance Maps. Recommendations were made to minimize exposure to moldy surfaces, abate all ACMs, and perform a sampling program to identify potential ground water contamination. A Quality Assurance Project Plan (QAPP) was developed by LAG in April 2010 to ensure QA/QC protocols for this project. The QAPP was reviewed and approved by the Quality Assurance Unit of the U.S. EPA Region I.

Following QAPP approval by the EPA, LAG proceeded to perform a Phase II Site Investigation. LAG probed the subsurface at this site near downtown Burlington with the use of a Geoprobe® unit. One vapor sampling point was installed to collect a soil vapor sample to determine potential vapor intrusion in the building. LAG had originally proposed the installation of monitoring wells throughout the property to obtain ground water levels and low flow water quality samples; however, no ground water was found at a depth of 34 feet. The vapor point was sampled with an air pump for 5 hours and submitted to the laboratory for TO-2 analysis. All site features were surveyed to produce a site plan. LAG’s rapid response allowed the determination of nearby potential chlorinated solvents and the continuation of Habitat for Humanity’s demolition and construction in a timely manner. Additionally, LAG provided CEDO and Habitat for Humanity follow-up advice on both project phases.

 

 

 

Dry Cleaning Facility
Morrisville, Vermont

In October 2002, LAG performed a Phase I ESA at this site and determined that it had operated as a dry cleaning facility since 1964. In November 2004 LAG conducted an Initial Subsurface Investigation in an effort to evaluate ground water quality conditions at and near the site. LAG identified PCE ground water contamination, which had migrated off-site. In November 2004 LAG performed a soil vapor survey to determine if vapors were present in the subsurface beneath the slab foundation of the building. Additional and more expansive ground water delineations were performed at a later time identifying a PCE plume migrating under neighboring buildings and streets in the Morrisville downtown area. Ground water sampling has been carried out since the Initial Subsurface Investigation in November 2004. In 2008 and 2009, two Corrective Action Feasibility Investigations (CAFIs) were conducted. Two Corrective Action Plans (CAPs) were generated and finalized in June 2010. The CAPs recommended the use of chemical oxidation and bioremediation technologies to address the chlorinated solvent source contamination which had migrated off-site to downgradient properties, as well as an extensive vapor intrusion barrier and sub-slab depressurization system to mitigate vapor intrusion in a nearby restaurant. Both corrective action plans are currently being implemented at the Site in the fall of 2010.

Former Retail Gasoline Facility
Irasburg, Vermont

In September 1991, the distribution line between a 4,000-gallon underground storage tank (UST) and a pump island was found to be leaking. Free phase gasoline product was observed in a nearby potable water supply well. After the delivery line was repaired, LAG was contracted to perform a series of investigations and mitigate the release. LAG’s investigations indicated that free phase, dissolved phase, and vapor phase petroleum hydrocarbons were present on and off-site. In addition, it was discovered that both the shallow glacial till and the deeper lower sand and gravel aquifers were impacted. In order to evaluate the effectiveness of potential remedial alternatives, Corrective Action Feasibility Investigations (CAFIs) were performed on several occasions. Upon evaluating the feasibility of ground water pump and treat, passive free product recovery, monitored natural attenuation, soil vapor extraction, multi-phase extraction, and biosparge technologies, it was determined that MPE and ground water pump and treat/free product recovery systems would effectively address the on and off-site contamination. In early 2007, the remediation systems were installed and remedial activities initiated. In August 2009, an additional well was installed to aid in the recovery of free product and dissolved-phase ground water contamination in the deeper aquifer. Significant mass contamination reduction has been obtained at this site. Currently, remedial activities as well as monitoring and sampling continue on a regular basis.

Convenience Store
East Calais, VT

In October 2008, at the request of the Vermont Department of Environmental Conservation (VTDEC), LAG submitted a work plan and cost estimate for a pilot test using new Plume Eater® technology in order to mitigate residual ground water contamination. Approval to conduct the pilot test was obtained from the VTDEC on October 29, 2008. The Plume Eater® system was installed on December 16, 2008 and operated until March 30, 2009. As a result, the enhanced aerobic bioremediation increased the number of hydrocarbon degrading bacteria. In fact, heterotrophic bacteria populations significantly increased in the targeted treatment area. Due to the increased number of bacteria combined with the decline in VOC concentrations compared to baseline levels, biodegradation is occurring. The adequate soil permeability compiled with acceptable ground water temperature, pH, and nutrients as well as DO, carbon dioxide, and bacterial population increase, suggests that the Plume Eater® technology will be effective as a permanent remedial system at the Site. This technology not only enhances bacterial growth but also strips VOC contaminants from the ground water. Currently, LAG developed a CAP and is awaiting approval from the VTDEC.