Hydro-Terra Group

On-Site Wastewater Systems

HTGAdmin — Sun, 31 Jul 2011 23:06:04 +0000

Hydro-Terra Group’s personnel bring over twenty years of experience to to wastewater systems construction projects, consulting with contractors, commercial and residential facilities, and government clients to develop cost-effective engineering solutions to wastewater challenges.

We will identify source reduction alternatives and pollution prevention opportunities to minimize the discharge of heavy metals, oil, and other contaminants into the wastewater system. We install treatment systems that provide de-nitrification and aerobic digestion for deep trench wastewater disposal, customized for each site to meet stringent Chesapeake Bay and Maryland Department of the Environment (MDE) requirements. Our technologically-innovative methods will keep you compliant with all regulatory permitting for on-site wastewater systems.

Our On-Site Wastewater Services Include:

Feasibility studies, including soil and subsurface permeability testing
Nitrate loading and groundwater mounding testing and analyses
Wastewater treatment system design, build, and installation
Cost feasibility studies on pollution prevention alternatives
Evaluation of wastewater treatability
Development of small community water supply and wastewater disposal systems

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Lakeview Mobile Home Park

Hydro-Terra Group recently designed, built, and installed a wastewater treatment system at Lakeview Mobile Home Park in Finksburg, Carroll County, Maryland.

Hydro-Terra Group has extensive experience in wastewater treatment systems of all sizes, but we specialize in developing small community wastewater projects of this scope.

Lakeview Mobile Home Park was too large for individual septic systems, but did not warrant its own wastewater treatment plant, making it an especially well-suited project for our firm.

Walnut Grove Development

Walnut Grove is a single-family home residential community in the Little Patuxent River watershed, a Chesapeake Bay tributary in Howard County, Maryland, where nutrient loading from wastewater is a concern.

Although large-lot on-site wastewater systems were originally considered, alternative low-impact shared systems were developed use the site’s natural features in a more efficient way. These low-impact systems preserved more open space, including some areas of historical value. We were also able to preserve the view-scape from the access roads to Walnut Grove.

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An innovative low-pressure sewer system (LPSS) collection system, sequential batch reactor (SBR) treatment system, and innovative drainfield distribution system were designed in compliance with Howard County and Maryland Department of Environment (MDE) requirements for public facilities.

Nutrient discharges were kept lower than prior agricultural use and well below drinking water standards.

We were able to find a low-impact solution to develop a professionally managed wastewater treatment and disposal system that significantly reduced nutrient impact to the watershed.

Water Supply and Treatment Systems

HTGAdmin — Sat, 30 Jul 2011 18:43:30 +0000

Hydro-Terra Group specializes in all phases of water resource development and management. There is no more precious natural resource on the planet than the Earth’s drinking water, and we are dedicated to finding technologically-innovative hydrogeological solutions to the challenges of water supply management. Our personnel bring decades of experience to:

WATER SUPPLY SERVICES

Well design, construction, and testing
Water balance analyses and appropriation permits
Potable water treatment system design and permitting
Small scale infrastructure design/build for municipal water resources

WATER BALANCE ANALYSIS

Watershed restoration, planning, and monitoring
Potable water assessment and permitting
MDE, SRBC, PADEP, DRBC, DNREC, VADEQ Withdrawal, NPDES, and Construction Permits

GROUNDWATER DEVELOPMENT

Groundwater Development is our specialty. Whether you need to provide clean, fresh, potable water for a new community, increase your supply reserves to an existing town, or provide irrigation; Hydro-Terra Group can help meet your water demand.

Our Hydro-Terra Group Hydro-Geologists, Geologists, Engineers, and Designers have well over 25 years of experience working in and around the Carroll County region and providing new drinking water sources for many of our local towns, townships, boroughs, and developments.

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What is Ground Water?

When rain falls to the ground, the water does not stop moving. Some of it flows along the land surface to streams or lakes, some is used by plants, some evaporates and returns to the atmosphere, and some seeps into the ground. Water seeps into the ground much like a glass of water poured onto a pile of sand.

As water seeps into the ground, some of it clings to particles of soil or to roots of plants just below the land surface. This moisture provides plants with the water they need to grow. Water not used by plants moves deeper into the ground. The water moves downward through empty spaces or cracks in the soil, sand, or rocks until it reaches a layer of rock through which water cannot easily move. The water then fills the empty spaces and cracks above that layer. The top of the water in the soil, sand, or rocks is called the water table and the water that fills the empty spaces and cracks is called ground water.

Click here to download the pdf “What is Ground Water” from the USGS.

AQUIFER TESTING

Finding the water is only the beginning of the process. The Hydro-Terra Group can also evaluate the long-term capacity and water quality of a newly developed groundwater source. Our scientists and environmental engineers can set up a comprehensive monitoring plan, capture the raw data during testing, interpret and submit the data to expedite regulatory agency approvals.

EPA WATER FACTS

It takes, on average, 39,090 gallons of water to manufacture a new car and its four tires.
62,600 gallons of water are needed to produce one ton of steel; 1,500 gallons to process one barrel of beer; and 9.3 gallons to process one can of fruit or vegetables.
On average, 50-70% of household water is used outdoors (watering lawns, washing cars).
The average American uses over 100 gallons of water per day; the average residence uses over 100,000 gallons during a year.
Americans drink more than 1 billion glasses of tap water per day.
The average cost for water supplied to a home in the U.S. is about $2.00 for 1,000 gallons, which equals about 5 gallons for a penny.
It costs over $3.5 billion to operate water systems throughout the United States each year.

Click here to read more in the EPA pdf “Drinking Water Facts and Figures”

SURFACE WATER: STREAMS, CREEKS, AND RIVERS

The quality and condition of our surface water is often linked to the overall health of the entire ecosystem. Our scientists and engineers offer a host of surface water evaluation services to help gauge the health of creeks, streams and rivers. Hydro-Terra Group scientists have a wide range of experience including measuring total stream flow (as seen above), bedload sampling, suspended sediment sampling, channel mapping, long-term monitoring of temperature & stream stage height as well as many other physical factors that affect stream health.

In addition to the physical stream characteristics, our staff can also test, monitor and sample for chemical parameters of the surface water. Just some of the field data collection that Hydro-Terra Group scientists have experience with include dissolved oxygen, salinity, pH, iron, hardness as well as developing specific testing procedures for other chemical properties suspected of being introduced into streams.

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BEACH TREE WATER SUPPLY PROJECT

Hydro-Terra Group performed a comprehensive water supply project in Upper Marlboro, Maryland that required our services across many different areas of expertise. We designed and constructed an entire irrigation system, building a dam to create a lake, which augmented the stream supply.

We designed and constructed controls that monitored residential wells in the area to regulate the flow of water through the system to ensure that the community water supply wasn’t adversely affected. We also drilled a well 1600 feet deep to tap an aquifer low enough in the ground to protect the area’s residential water.

In this photo gallery, you’ll see the project progress from stream diversion and sub-grade preparation, to anchor trench excavation and panel installation, through to construction of the dam and wooden bridge.

Geotechnical Services and Cone Penetrometer Testing

HTGAdmin — Sun, 24 Jul 2011 20:17:21 +0000

Hydro-Terra Group’s Cone Penetrometer Testing (CPT) is a low-disturbance, minimally intrusive subsurface investigation tool.

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Cone Penetrometer Testing has been used extensively in Europe for over 50 years for hydrogeologic, environmental, and engineering investigations. The test itself consists of pushing a 1.41-inch-diameter cone with a 55-degree conical tip through the underlying ground at a rate of 2 cm/sec with up to 20 tons of force. CPT soundings can effectively characterize the subsurface in unconsolidated soils, alluvium, and weathered rock.

How CPT Works

Hydro-Terra Group’s CPT soundings use digital electronics to directly measure and log tip resistance, sleeve friction, inclination, and pore pressure and calculate tip/sleeve & pore pressure ratios, Std. Penetration Test (SPT) equivalent, and soils interpretation at 2 cm intervals (ASTM D-5778), supplemented by soil cores. On a maneuverable dual-wheel truck, our standard 4-ton CPT force sounds to 70 feet. For tougher jobs, on-board earth augers generate 20 tons.

Advantages of CPT

Fast, accurate, and generates no soil materials, no borehole stability concerns.
Real-time stratigraphic profiling of soils, hydraulic boundaries and conductivity.
Stand-alone or with borings & geophysics.
Geotechnical/foundation design and sinkhole investigation/remediation data.
In-situ laser-induced fluorescence (LIF) capability to identify hydrocarbons.
Data for 3-D modeling and visualization.
Stern-mount sounds near to structures.

Applications

Geotechnical support for residential & commercial facilities/infrastructure.
Karst/sinkhole investigation & repair.
Roadway/pipeline plans to limestone or environmentally-sensitive areas.
Pre-construction depth-to-rock surveys.
Soil and groundwater characterization for on-site wastewater design.
Soils and water table determination for storm water management design.
Environmental site characterization for liquid-phase hydrocarbons.

Remediation of Petroleum Contamination

HTGAdmin — Sun, 24 Jul 2011 16:18:21 +0000

Remediation of Petroleum Contamination

Expert Remediation Design and Oversight

HTGAdmin — Sun, 24 Jul 2011 15:57:15 +0000

Expert Remediation Design and Oversight

Environmental Investigations to Assess Risks

HTGAdmin — Sun, 24 Jul 2011 15:33:32 +0000

We perform environmental investigations to characterize conditions and assess risks, and have designed and implemented remedial measures addressing soil and groundwater contamination problems.

Environmental Engineering Firm Serving the Mid-Atlantic Region

HTGAdmin — Sun, 24 Jul 2011 15:25:35 +0000

Hydro-Terra Group - Environmental Engineering Firm Serving the Mid-Atlantic Region

Environmental Investigation of Hazardous and Non-Hazardous Contaminants

HTGAdmin — Sun, 24 Jul 2011 14:59:30 +0000

Environmental Investigation of Hazardous and Non-Hazardous Contaminants

Comprehensive Site Investigation and Remediation Services

HTGAdmin — Sun, 24 Jul 2011 14:53:06 +0000

Hydro-Terra Group provides comprehensive site investigation and remediation services to commercial, residential, and government clients in the Mid-Atlantic Region.

Environmental Monitoring

HTGAdmin — Sun, 24 Jul 2011 14:39:49 +0000

Environmental Monitoring