| Clients rely on McLane Environmental
for premier groundwater consulting services. Engineering firms,
legal firms, corporate clients, municipalities, and state and federal
governments have benefited from our breadth of experience in applying
the proper scientific approach and analysis tools to swiftly obtain
answers to their groundwater problems.
Our core expertise encompasses groundwater services in areas relating
to:
Work on scores of groundwater projects over the past two decades
has uniquely positioned us to assist clients in dealing with the
various issues that can arise.
Site
Investigation & Remediation
Our staff of hydrogeologists and environmental professionals has
experience in every stage of Site Investigations and Site Remediation
of groundwater systems from background studies to designing site
sampling and analysis plans, siting monitoring wells, determining
the extent of groundwater contamination, and designing remediation
strategies.
Representative Experience
- Developed Conceptual Site Models (CSM) to
better assess site issues, and to evaluate remediation
alternatives for sites in New Jersey and New York.
- Prepared site sampling plans to evaluate
the extent and magnitude of sources of contamination for sites in
New Jersey.
- Performed flow and fate and transport
modeling to determine contaminant migration from potential sources
to areas of environmental concern at sites in New Jersey,
Maryland, and Massachusetts.
- Developed a monitored natural attenuation
parameter sampling plan for a solvent contaminated landfill site
in New England.
- Analyzed performance of groundwater
remedial alternatives for a western Department of Energy facility
and assisted site contractor in implementing cost-effective
remedy.
- Determined alternative site-specific soil
cleanup levels to guide groundwater remediation and optimized pump
and treat systems at sites in New Jersey, Illinois and California.
- Performed computer modeling of proposed
trench designs for landfill groundwater remedy to ensure required
capture of contaminant plume.
- Provided expert support services to U.S.
Army Environmental Command to review investigation and remediation
programs at active and BRAC (Base Realignment and Closure)
installations.
- Served as external advisory expert to review and provide recommendations
regarding a $70 million site characterization program at a southwestern
U.S. Department of Energy facility.
Aquifer
Testing & Analysis
McLane Environmental staff possesses a depth of experience in the
design, implementation, and analysis of aquifer tests, pumping tests,
and slug tests for characterizing aquifer properties. We have worked
with public water suppliers to design and execute aquifer test programs
at well field sites for the purpose of maximizing water production,
while preserving the natural balance of surface water-groundwater
interactions in ecologically sensitive areas. We have also designed
tests in coastal areas where careful collection and analysis of
aquifer data are key elements in understanding and mitigating the
threat of saltwater intrusion.
Representative Experience
- Designed, instrumented, collected, and
interpreted aquifer test data for optimization and effectiveness
of groundwater remediation systems in California.
- Provided aquifer testing recommendations
to support site characterization efforts at a U.S. Department of
Energy facility.
- Designed and analyzed an aquifer test to
determine hydraulic properties and vertical anisotropy for a 3-D
density flow modeling study to estimate safe yield pumping rates
in a coastal aquifer subject to saltwater upconing beneath the
well field.
- Analyzed aquifer test data to develop
estimates of aquifer properties for a subsurface wastewater
disposal engineering project.
- Collaborated on the design of an aquifer testing program to
evaluate the effects of increased well field withdrawals on nearby
sensitive hydrologic and ecologic receptors.
Groundwater
Modeling
Our team of modelers has extensive experience utilizing industry
accepted groundwater models, and model calibration and optimization
software. We have successfully developed or reviewed numerous models
for projects related to aquifer characterization, site remediation,
water resources, regulatory compliance and environmental litigation.
McLane Environmental staff is experienced in analyzing groundwater
flow and chemical fate and transport processes using a spectrum
of tools that ranges from simple screening models to sophisticated
three-dimensional numerical models to simulate:
- Unsaturated zone water flow and chemical
transport: SESOIL, VLEACH, PRZM, MULTIMED, VERT, OGABIO, JURY,
PESTAN, HELP, HYDRUS.
- Groundwater flow and particle tracking:
DYNFLOW/DYNTRACK, MODFLOW/MODPATH/FLOWPATH, RADMOD, GFLOW, Visual
AEM/Blue Bird, WinFlow, THWELLS, EFAM and TWODAN.
- Saltwater intrusion: SEWAT, MOCDENS3D,
SWI, SUTRA.
- Pumping-induced drawdown and stream
depletion: StrpStrm.
- Groundwater flow calibration: PEST, ASP
and UCODE.
- Groundwater flow optimization: MODOPT and
BRUTEFORCE.
- Groundwater transport modeling: MT3D,
RT3D, PTC (Princeton Transport Code), AT123D, PRINCE, ASMWIN,
SOLUTRANS, ATRANS, and BIOSCREEN/BIOCHLOR.
- Wellhead protection areas: WhAEM, WHPA.
- Tidal modeling: TIDES.
Representative Experience
- Constructed and calibrated a groundwater
model of Passaic formation bedrock aquifers in New Jersey, to
support permitting of an industrial production well and to
evaluate the influence of the well on nearby wetlands.
- Updated a USGS model simulating water
supply well fields in Cape Cod, Massachusetts to determine the
influence of pumping on the saltwater interface as part of new
source allocation permitting studies.
- Constructed and calibrated a groundwater
flow model of a glacial aquifer in Massachusetts to evaluate
hydrologic impacts associated with planned well field operation.
- Calibrated a model representing bedrock
aquifers in Ohio to simulate flow in and around an abandoned
underground coal mine where Flue Gas Desulfurization (FGD)
materials were emplaced.
- Updated a groundwater flow model of the
Charnock Sub-Basin in California, as a basis for optimizing the
groundwater remediation system.
- Modeled proposed designs for municipal
sewage treatment system infiltration beds to determine appropriate
location, size and loading rates to obtain state regulatory
approval for the project.
- Performed design analyses to evaluate
screen placement, pumping rates, and plume capture effectiveness
for a proposed pump and treat system in a coastal sole source
aquifer.
- Provided services to the U.S. Department
of Energy in reviewing the modeling program and selected modeling
studies performed for one of DOE’s major southwestern facilities.
- Performed hydraulic capture zone analyses
to evaluate the effectiveness of a proposed pump and treat system
for a manufacturing site in Naples, Italy.
- Performed an engineering peer review of wastewater reinfiltration
modeling studies for a land reuse design and permitting project
at a former U.S. Navy facility in New England.
Chemical
Fate & Transport
Analysis of the fate and transport of chemicals in the subsurface
is one of McLane Environmental's primary strengths. We combine our
knowledge of fate and transport processes with our background in
groundwater flow modeling to address problems from salinity impacts
in coastal regions to plume migration and cleanup studies for hazardous
waste sites. Our staff has experience in conducting a variety of
fate and transport analyses for regulatory compliance, litigation
support, water resources management, and exposure and risk assessment,
including subsurface fate and transport of metals, chlorinated solvents
(CVOCs), MtBE, BTEX, pesticides, perchlorate and other chemicals.
Our fate and transport modeling has also been utilized in remediation
design and optimization analyses, soil leaching and threat to groundwater
analyses, identification of multiple sources of contamination in
areas of plume comingling, and evaluation of monitored natural attenuation
(MNA) remedies. We have provided contaminant fate and transport
analyses on site remediation projects, wastewater projects, and
in litigation using various fate and transport models.
Representative Experience
- Simulated the
concentrations of fluidized bed ash constituents dissolved in groundwater in
a bedrock aquifer in Ohio to estimate concentrations in
springs and seeps entering a surface water reservoir.
- Conducted fate and transport simulation
of refractory compounds, such as 1,4-dioxane and perchlorate,
at sites in Indiana and California, to determine appropriate
remediation strategies for the site.
- Modeled the effects of tidal fluctuations
on groundwater transport of the chemical of concern in an aquifer
in Delaware to evaluate impacts on adjacent surface water for use
in risk assessment studies.
- Performed contaminant migration
simulations from different known sources to evaluate the
contribution of potential responsible parties (PRPs) in CERCLA
matters related to soil and groundwater clean-up of a regional
Superfund site.
- Simulated soil cleanup concentrations in
the vadose zone for sites in New Jersey and California, to assess
different soil remediation options.
- Analyzed dissolved metals removal rates
as part of a review of the U.S. EPA proposed groundwater remedial
action for a Superfund site in central New Jersey.
- Analyzed the movement of dissolved
chlorinated compounds in groundwater from industrial facilities at
a southwestern Superfund site to estimate arrival times at nearby
water supply wells and relative contribution from the identified
sources.
- Modeled groundwater transport of petroleum compounds including
the gasoline additive MtBE from several service stations in the
Mid-Atlantic region to evaluate the timing of releases and the
resulting impacts to receptors following release.
Water
Supply and Well Field Management
McLane Environmental has applied its expertise in groundwater hydrology
to numerous well field projects in which we have provided a range
of services including geologic data interpretation, aquifer test
analysis, groundwater modeling, safe yield analyses, groundwater
protection studies, saltwater intrusion mitigation analyses, well
field rehabilitation projects, and long range water supply planning.
Our skills and expertise are particularly valuable to water superintendents
and well field managers in the areas of groundwater protection and
saltwater intrusion mitigation as described below.
Wellhead Protection & Source Water
Protection Programs
With our expertise in the technical aspects of groundwater modeling,
and contamination issues related to groundwater and surface water,
along with our capability in GIS spatial analysis, McLane is well
equipped to define areas requiring protective measures to preserve
groundwater quality. Our team has extensive experience in conducting
Well Head Protection Area (WHPA) and Source Water Protection Area
(SWPA) analyses and in developing protection plans for water supply
systems. McLane Environmental has assisted government agencies in
providing training and raising public awareness regarding source
water protection issues.
Representative Experience
- Developed and presented a national series
of workshops sponsored by U.S. EPA to introduce municipalities,
land use planners, legislators, environmental attorneys, and water
supply consultants to the principals and methods of Wellhead
Protection Area (WHPA) delineation.
- Developed and presented a national series of U.S.
EPA workshops on the application of groundwater computer models for
delineating Wellhead Protection Areas.
- Determined the Source Water Protection Area (SWPA) for a proposed
water supply well field in Cape Cod, Massachusetts to support
a municipal application for a water allocation permit.
Saltwater Intrusion & Upconing
Coastal municipalities and states are facing challenges in groundwater
resource management due to existing or potential saltwater intrusion
problems. We have become one of the leading firms in the nation
in the analysis of coastal zone aquifers, and have developed a specialized
suite of modeling tools to examine saltwater interface dynamics
and density-dependent groundwater flow and transport. We have performed
studies for clients on several coastal aquifer systems including
Cape Cod, Long Island, and the Potomac-Raritan-Magothy aquifer system
in New Jersey.
Representative Experience
- Modeled the movement of the saltwater
interface beneath a water supply well field on Cape Cod,
Massachusetts to estimate a sustainable safe yield that will
prevent salinity impacts to the water supply.
- Performed a comparison of four
density-dependent flow and transport models (SEAWAT, MOCDENS3D, SWI and
SUTRA) to determine their strengths and weaknesses for use in well
field saltwater upconing analyses in coastal environments.
- Simulated the regional response of a
freshwater lens aquifer on Cape Cod to various pumping scenarios
at multiple well fields to assist with the development of a long
range water supply plan.
- Analyzed drawdown and potential saltwater interface movement
for alternative well field pump deployment options to guide technology
selection decisions in a well field rehabilitation design study.
Groundwater services form the core of McLane Environmental’s
consulting. Our highly skilled team of groundwater scientists and
engineers provide expertise in aquifer testing, characterization
and modeling to successfully complete any water supply development
or groundwater restoration project.
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