Since 1973, INTEX has been and continues to be a leader in the groundwater development industry. INTEX has provided services including, well location, well logging, aquifer testing, modeling, and permitting to many municipalities, developers and industry since it's inception. The specialized academic training and experience of INTEX principals in the areas of hydrology and hydrogeology has been instrumental in the firms growth in this field of study.

Groundwater Development

• Feasibility studies and monitoring programs
• Water-use studies
• Production well siting, design, installation, and testing (hydraulic and water quality)
• State and Interstate well permitting
• Wellhead protection and impact investigations
• Wellfield operation and maintenance
• Well rehabilitation and redevelopment
• Water treatment design and testing
• Recharge studies
• Aquifer evaluation
• Groundwater basin analysis
• Stream depletion studies

Subsurface Investigations

• Underground storage tank removals, installation, management, and reimbursement
• Soil boring and monitor well installation and development
• Groundwater and soil quality sampling (by either conventional methods or by GeoProbeŽ)
• Gauging, well pumping tests, piezometer tests
• Soil gas surveys
• Geochemical studies
• Contamination plume definition: extent, migration, and rate of movement
• Fate and transport studies
• Risk assessments and receptor surveys

Luzerne County, PA
INTEX Environmental was contracted to design and test a wellfield to replace an aging surface water reservoir. A total of 12 wells were eventually located and installed. INTEX designed and staffed a simultaneous pumping test of all the wells, performed an analysis on the aquifers' capabilities and submitted a report to accompany the permit application.

Long Island, NY
INTEX Environmental was contracted to evaluate the potential for removal and reinjection of groundwater for non-contact cooling purposes. After an initial background investigation into the geology and hydrogeology of the area, INTEX installed a test well and several monitoring points into the selected hydrogeologic unit. A 48-hour pumping test was performed to obtain the hydraulic characteristics of the aquifer. The information was used in several computer models to evaluate the feasibility of long-term withdrawal and reinjection.

Chemical Manufacturing Plant
Evaluated long-term potential yield and expansion in a 10 million gallon-per-day wellfield used to supply cooling water to major industrial facility. Responsible for developing and calibrating groundwater flow model, using MODFLOW, to predict wellfield performance and induced infiltration from Ohio River under drought conditions. Model encompassed active area of about 2,500 acres, represented by variably-spaced orthogonal grid of almost 1,000 cells. Twelve active pumping wells, with individual capacities ranging up to 1,400 gallons per minute, were represented in the grid. Model was calibrated using water level data provided by facility for approximately 45 piezometers. Study provided facility with information on sources of water that it pumps, size of the zone of contribution supplying its wellfield, and likely upper limit of groundwater yield that it can expect from an expanded wellfield under adverse weather conditions.

High Yielding Well Development, Limestone Aquifer
A hydrogeologic study including fracture trace analysis, exploratory drilling and aquifer testing, was conducted to locate a high yielding water supply well in a limestone aquifer with close proximity to a volatile organic chemical contamination site.

Water Resources Study, Municipal Utilities Authority
A complete water resources investigation of a 29 square mile area was conducted. The project involved determination of the groundwater availability in complex and varied geologic terrain, calculation of drought situation recharge to aquifers based on long-term stream monitoring, location of optimum well site areas, and location of potential groundwater pollution sources.

Long-term Hydrologic Monitoring and Compliance
The monitoring of wells and streams was conducted in compliance with regulations set forth in the Delaware River Basin Commission groundwater withdrawal permit procedures. The project included weekly monitoring of observation well network, construction of well hydrographs, measurement of stream discharge, and construction of stage-discharge graphs. The collected data were interpreted to assess the impact of the water withdrawal project on the hydrologic environment. A DRBC water withdrawal permit was secured.

Long-term Supply Analysis, U.S. Air Force, Edwards Air Force Base
Evaluation of base potable water supply for long-term safe yield. Study included rehabilitation of specific supply wells in base wellfield, performance of field tests of well yield, estimation of long-term groundwater basin storage and depletion rates, and assessment of potential areas for wellfield expansion. Results of groundwater study were used to support modeling of base water supply distribution system, and to identify critical areas for upgrade in supply.