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Denver

950 S. Cherry Street, Suite 810 
Denver, Colorado 80246

(303) 782-0164
FAX: 303-782-2560

 

Houston

1322 Space Park, Suite A-180
Nassau Bay, Texas  77058

(281) 333-2241

FAX:  281-333-1192

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cover collage.jpg (33023 bytes)Applied Hydrology Associates, Inc. (AHA), a Colorado Corporation founded in 1982, provides innovative hydrological, engineering, and legal support services to private industry throughout the United States and abroad.

Our clients represent companies in the mining, manufacturing, chemical, and energy industries and include small companies, Fortune 500 corporations, and law firms.  The following is a sampling of selected clients: Lyondell Chemical, Shell Exploration and Production Company, Atlantic Richfield Company, BHPBilliton, Devon Energy, Evergreen Resources and Williams Production.

AHA operates out of its main offices in Denver, Colorado and from branch offices in Houston, Texas, Trinidad, Colorado and Gillette, Wyoming.

AHA has developed a solid reputation for thorough, well-planned, and cost effective services.

AHA has anchored its reputation on the active participation of its principals in every project. Efficiency, innovation, and responsiveness make AHA stand out from other consulting companies.  The industrial experience and technical knowledge of our principals are key to understanding and focusing on client needs. This combination allows AHA to provide quality management and technical skills in a cost-effective manner.

 

Corporate Experience By Special Item Number (SIN)

SIN 899-1

Environmental Planning Services & Documentation

 

SIN 899-2

Environmental Compliance Services

 

SIN 899-4

Waste Management Services

 

SIN 899-7

Geographic Information Systems

 

SIN 899-1: ENVIRONMENTAL PLANNING SERVICES & DOCUMENTATION

 

Applied Hydrology Associates, Inc. (AHA) staff has extensive experience in the hydrologic components of Environmental Impact Statements (EIS) and Assessments (EA), other natural resource studies, and related risk assessments. Hydrologic issues have been at the heart of several such documents, particularly those related to mining and energy (particularly coal-bed methane [CBM]) development. AHA has prepared hydrologic models and technical documents assessing the hydrologic impacts of energy development for five major Western basins (San Juan, Uinta, Piceance, Carbon, and Powder River). AHA also developed work plans, performed model and scenario selection, and completed initial calibration of an integrated surface water-groundwater model, simulating post closure changes in the water balance at DOE’s Rocky Flats former nuclear weapons plant.

 

Hydrogeologic modeling

 

Hydrogeologic modeling is applicable to 3 SINs (899-1 and 899-4) and is used extensively for environmental planning. Applied Hydrology Associates has extensive experience in analytical and numerical modeling to evaluate ground water flow and quality. Modeling is used to analyze existing hydrogeologic conditions, and predict impacts of engineered interventions such as dewatering yield and drawdown and remedial design.

 

Specific planning studies have included:

 

*      Definition of existing flow patterns, and water balance

*      Analysis of hydrologic testing

*      Prediction of ground water inflow to mines, and mining impacts on regional aquifers

*      Design of mine overburden dewatering systems

 

Powder River Basin EIS AHA evaluated probable groundwater impacts associated with coal-bed methane development in the Powder River Basin of Wyoming. This work was performed as part of the comprehensive EIS conducted for the BLM in cooperation with the major CBM producers. AHA developed an eight-layer MODFLOW numerical model of the PRB to simulate impacts under various CBM development scenarios. Predicted potentiometric drawdown in coal was used to assess methane desorption potential. Groundwater quality issues were also addressed. AHA performed transient groundwater flow modeling of the Powder River Basin to determine the cumulative impacts of surface mining and CBM development of the Upper Fort Union coals. Over 50,000 CBM wells are scheduled to be installed and developed in the Wyoming portion of the PRB over the next 10 years. This work was performed as part of the Wyoming PRB Environmental Impact Statement (EIS) for CBM development.

 

San Juan Basin CBM Planning AHA performed two elements of the Colorado Oil and Gas Conservation Commission’s San Juan Basin 3M (Mapping, Monitoring, and Modeling) project. The monitoring element involved the design, and construction supervision of four clusters of groundwater elevation and gas pressure monitoring wells, up to 1,600 feet deep, screened in the main CBM-producing zone. Data from these wells are collected remotely using telemetry. For the modeling element, AHA developed a steady-state groundwater model for the entire San Juan Basin representing pre-CBM development conditions and water balance. Included in our study were: (1) evaluation of outcrop recharge based on chloride balance; (2) evaluation of natural isotopes as recharge indicators and dating tools; (3) compilation and simplification of formation stratigraphy and structure; (4) integration of reservoir modeling derived aquifer parameters; (5) calibration against historic formation pressures and stream discharge rates; and (6) assessment of cross-formation flow rates and surface water discharge mechanisms.

 

PHC Modeling of Mine Inflows and Impacts AHA determined the probable hydrologic consequences of underground coal development projects in the San Juan Basin of Northwestern New Mexico, in the four-corners area and in Montana. We performed extensive groundwater modeling to predict mine inflows and impacts on the groundwater system. This modeling typically incorporated anticipated increased permeabilities associated with subsidence above the mine workings.

 

Ferron Sandstone CBM EIS As part of the Ferron Sandstone CBM EIS study, AHA performed transient groundwater flow modeling of the coal aquifer in Utah’s Uinta Basin to determine the cumulative impacts of 870 operating CBM wells on the groundwater system over the next 40 years.

 

Hydrologic Analysis and Testing

 

AHA’s planning services also include hydrologic analysis and testing for input into planning documents.

 

Bluewater Uranium Mill Site AHA prepared the Alternate Concentration Limit (ACL) petition for the Bluewater Uranium Mill, near Grants, NM. This is the first and only ACL Petition that has been approved by NRC and was a key milestone for termination of ground water corrective action and transfer of the site to DOE for perpetual care. This effort included development of risk-based concentrations for hazardous constituents at the potential points of exposure in the alluvial and bedrock aquifers, and ground water transport modeling to relate concentrations at the compliance points to the potential points of exposure.

 

AHA also developed the ground water corrective action programs, prepared the evaluation of ground water corrective action programs, including wick drainage of tailings slimes, and provided technical support on hydrologic aspects of the reclamation plan. Other work at the site has included: preparation of monitoring plans for on-site disposal of PCB contaminated by-product material, preparation of well abandonment plans, report review, interpretation of data, participation in strategy development, and presentations to regulatory agencies.

 

Colony Oil Shale Project AHA personnel completed the hydrologic characterization, analyzed mining and spent shale disposal impacts, and designed monitoring programs for the Colony Shale Oil Project in NW Colorado. A detailed testing program was performed for evaluating vertical and lateral characteristics within a fractured, multi-aquifer system in order to predict mine inflows and groundwater impacts. AHA also performed an evaluation of tributary and non-tributary water for a water rights assessment for the project.

 

Piceance Basin, Colorado An extensive hydrology well test program was performed to support regional groundwater modeling and aquifer dewatering research in the Piceance Basin in northwestern Colorado. The 9-month field program involved 59 single and 20 multiple well step-tests, 24- to 48-hr constant-rate tests, recovery tests, and water quality sample collection from five water-bearing zones. Three pressure transducers and an automatic data logger were used to measure and record aquifer system pressure responses above, within, and below each pumping test zone isolated in test wells by a straddle packer system. Test well depths ranged between 1,100 and 2,200 feet, and metered pumping rates ranged from 1 to 28 gpm.

 

AHA performed similar analysis and testing, including gas production rate tests, for projects in the Powder River Basin and Carbon Basin.

 

AHA has assisted mine operations in developing water supplies, designing surface water controls, treating mine water discharges, determining mine inflows for both surface and underground mines, and designing mine and overburden dewatering systems.

 

Caballo Mine, Wyoming AHA designed and installed a 2,200 gpm dewatering system that successfully lowered water levels adjacent to a proposed mine pit. Pumped water was piped and re-injected into another bedrock unit to artificially recharge the groundwater used for water supply at the mine.

 

Belle Ayr Mine, Wyoming AHA worked with Cyprus-AMAX to design and implement an innovative overburden dewatering system at the Belle Ayr mine in Wyoming to improve highwall stability and operational efficiency. This effort included developing a comprehensive ground water flow model for the mine vicinity.

 

Surface Water Studies

 

AHA has conducted a wide variety of surface water studies, including modeling urban and rural stormwater runoff and water quality sampling. AHA performed salinity control studies to comply with the Regulations for Implementation of the Colorado River Salinity Standards through the NPDES Permit Program for several coal-mining sites in Colorado. AHA also determined non-tributary water sources in developing water supplies for mining operations and participated in the preparation of water augmentation plans to protect water rights that could be impacted by mining.

 

AHA completed studies on the cumulative water quality impacts of planned CBM development in the Powder River Basin of Wyoming for a consortium of operators. These studies addressed concerns about potential increases in sodium adsorption ratio (SAR), salinity and other water quality constituents in the main stem streams in Northeastern Wyoming. The studies have included statistical evaluations of baseline conditions and detailed modeling of water quality based on tributary inflows and geochemical changes. AHA developed and managed a tributary monitoring program that measures flow and water quality contributions to main stem streams so that actual cumulative impacts can be evaluated.

 

AHA personnel developed an urban surface hydrology model that showed the impacts of urbanization on a trout stream near Afton, MN. The SWAT (Soil and Water Assessment Tool) model was interfaced with ESRI’s ArcViewâ. Scenarios from high-density (i.e. apartments and town homes) to five-acre developments with and without retention ponds were analyzed for sediment load and runoff.

 

Personnel from AHA were involved in a runoff study on urban lawns in the Twin Cities, MN that required the development of surface runoff capturing units. Runoff was analyzed for total phosphorus, soluble reactive phosphorus, TSS, and total nitrogen. This study was the catalyst for many municipalities, and finally the Minnesota House of Representatives and Senate (HF1524/SF1555), to restrict the use of phosphorus-based fertilizers in the Twin Cities Metro Area.

 

AHA is currently working on an evaluation of a potential BMP for urban stormwater. This evaluation consists of collecting inlet and outlet water flow from a stormwater sewer using a doppler flow sensor, a rain gauge, and a water quality sampler.

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SIN 899-2: ENVIRONMENTAL COMPLIANCE SERVICES

AHA staff has conducted compliance audits, site investigations, response actions, and permit preparation activities including:

 

  • Site Geology Reports
  • Sampling and Analysis Plans
  • Waste Analysis
  • Facility Design
  • Minimum Technology Waivers
  • Closure Plans
  • Contingency Plans and Emergency Procedures

 

RCRA Compliance

 

AHA personnel have been involved in permitting RCRA Hazardous Waste Treatment, Storage and Disposal Facilities since adoption of the RCRA regulations in 1980. We have prepared Part B permits for soil and wastewater treatment facilities at chemical plants and research facilities. AHA personnel have assisted clients on RCRA compliance for both permitted and interim status facilities. Our RCRA compliance activities have included:

 

  • Detection and Compliance Monitoring & Reporting
  • Statistical Evaluation and Revision of Statistical Significance Test
  • Interim Status Ground Water Quality Assessments
  • Alternate Concentration Limit Petitions
  • RCRA Feasibility Investigations
  • RCRA Corrective Action

 

Research Lab, Tucson, AZ AHA personnel developed the SAP and performed RCRA monitoring of a hazardous waste treatment, storage, and disposal (TSD) facility at the former Anaconda Research Lab. We also developed and implemented the closure plans for this facility.

 

Channelview Chemical Plant AHA developed the geologic investigation and the sampling and analysis plans for the RCRA Part B Permit application for several treatment facilities at the Channelview Chemical Plant near Houston, Texas. We have conducted RCRA monitoring and reporting for these facilities under both interim status and final permit status. We also assisted the client in obtaining a minimum technology wavier for one of the facilities.

 

AHA has also conducted RCRA Feasibility Investigations and Groundwater Corrective Action at this chemical plant. Corrective Action included an in-situ bioremediation system for chlorinated VOCs in ground water at this site. We are currently directing the operation of the ground water remedial system and tracking and documenting remediation progress

 

TSD Facility, Richmond, CA AHA personnel conducted a RCRA Facility Investigation (RFI) for a 170-acre Class II disposal facility and a 28-acre Class I disposal facility located in Richmond, California

 

Wood Treating Facility AHA provided technical review, analysis and recommendations related to hydrologic investigations and remedial action plans for RCRA closure of hazardous waste ponds at a Weyerhauser wood treating facility in Arkansas.

Bluewater Mill Site AHA developed the ground water corrective action programs and prepared the annual evaluation reports of ground water corrective action for the ARCO’s Bluewater Uranium Mill near Grants, New Mexico. The ground water protection regulations for Title II facilities parallel the RCRA ground water protection regulations.

 

AHA also prepared the Alternate Concentration Limit (ACL) petition for this facility. This is the first and only ACL Petition which has been approved by NRC and was a key milestone for closure of this site and transfer to DOE for perpetual care. This effort included development of risk based concentrations for hazardous constituents at the potential points in the alluvial and bedrock aquifers, and ground water transport modeling to relate concentrations at the compliance points to the potential points of exposure.

 

Mining Related Permitting Activities

 

AHA’s senior staff has been involved in permitting coal-mining operations since adoption of the Surface Mining Control and Reclamation Act in 1977. We maintain a thorough working knowledge of State and Federal regulations. AHA has performed a number of baseline studies, alluvial valley floor (AVF) investigations, and probable hydrologic consequences (PHC) assessments in support of mine permit applications at over 20 mining operations in the Western US. We have evaluated the hydrologic impacts of longwall mining and associated subsidence, and have developed mitigation measures to protect surface and ground water resources. AHA has also prepared annual hydrologic reports for coal mining operations in Colorado and Wyoming.

 

Jackpile Mine Reclamation AHA personnel developed a reclamation plan for the Jackpile Mine, New Mexico that minimized the amount of pit backfilling and associated reclamation costs and improved post-mining land use. The plan included a water impoundment in the mine pit. Water diversions were included to increase flows to the impoundment and an outlet tunnel was designed to reduce the volume and surface area of the impoundment. This minimized evaporation loss and helped maintain acceptable water quality in the reclamation impoundment and in the discharge.

 

Rico-Argentine Mine AHA negotiated water quality based effluent limits with the Colorado Dept. of Health for the discharge from the St. Louis Mine Adit at this site. We assembled and interpreted streamflow, water quality, and in-situ biomonitoring data on the Dolores River to identify the sources of metals loading and to support development of site specific water quality based permit limits for the treated mine discharge. Water quality evaluations were performed for seasonal flows and for the critical 7-day, 10-year low flow condition. We also managed environmental studies on the project prior to the sale of the site, including investigation of tailings stabilization and long term solutions including adit plugging.

 

Bull Mountains, Montana AHA developed hydrologic interpretations in support of the permit for a longwall coal mining project in the Bull Mountains, Montana. This work included an assessment of potential impacts of mine dewatering and mine subsidence on surface and ground water resources. The analyses included a water balance and transient modeling to predict ground water drawdowns, mine inflow rates, and mine pool fill rates.

 

Various mines, CO, UT, WY AHA has conducted AVF investigations delineating the extent of unconsolidated stream-laid deposits and determining flood irrigation and subirrigation potential at a number of mines, including the Bull Mountains Mine in Montana, the Black Thunder and Coal Creek Mines in Wyoming, the Alton Coal Mine in Utah, and the Mt. Gunnison Mine in Colorado. AHA also designed and implemented hydrogeologic studies in support of a permit for underground coal gasification within steeply dipping beds in Wyoming. A groundwater restoration plan was developed based on inoculation of burn cavities with sulfate-reducing bacteria.

 

Coal Bed Methane Permitting and Compliance

 

AHA has provided permitting support, environmental compliance auditing and monitoring, database development and management, technical support for water disposal options, and engineering solutions to water quality issues for CBM operators in the Powder River and Raton Basins since 1997.

 

AHA assists operators in developing water management plans to address how produced water will be handled at CBM developments. This includes permitting with BLM and state agencies for surface discharge of produced water under the NPDES and stormwater programs to mitigate impacts to stream channels and related structures. For water management by deep well injection, AHA has completed Class II permit applications and presented aquifer exemption arguments at Oil and Gas Commission public hearings on behalf of CBM operators. AHA also designs impoundments and provides construction management. In Wyoming, over the past 3 years, AHA has submitted 17 BLM water management plans, 55 NPDES permits, and 250 reservoir designs.

 

Surface Water Monitoring

 

AHA personnel have experience in water quality sampling and hydrological data collection. AHA has sampled lakes for total phosphorus, total nitrogen, ammonia, hardness, chlorophyll, and fecal coliform. One site, the 14,500-acre Lake Minnetonka, was sampled in 18 of its bays for two years. The resulting data was used by Hennepin Parks to assess the relative health of certain bays. In northeast Wyoming and in southeast Colorado, AHA personnel sample streams on a monthly basis for dissolved iron, sodium adsorption ratio, total barium, specific conductivity, and many other parameters for compliance with discharge standards.

 

Design of Stream Channels, Diversions, and Erosion and Sedimentation Controls

 

AHA has designed and supervised construction of sediment ponds, alternate sediment control structures, stream diversions and stabilized stream channels in Colorado, New Mexico, Utah, and Wyoming. The design procedures involved the application of geomorphic regime theory and the use of various surface water hydrology and erosion and sediment transport computer simulation programs. AHA has designed and supervised construction of stable stream channels and post mining topography in accordance with State and OSM diversion design and approximate original contour (AOC) regulations and guidelines. Erosion and sediment controls have been designed to meet applicable discharge standards for settleable solids using the SEDCAD3+ computer program.

 

Stream Bank Stabilization

 

To satisfy mining permit requirements, AHA designed and oversaw installation of 35 bank side rock veins, tree planting and reseeding to protect a rail spur along 900 feet of the Williams Fork River. The design was approved by the US Army Corps of Engineers and the Colorado Division of Mines and Geology. This approach was the most-cost effective stabilization method and also improved fish habitat

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SIN 899-4: WASTE MANAGEMENT SERVICES

AHA has designed, overseen construction, and managed waste handling operations at numerous chemical plants, Superfund and State-led cleanup sites, and mine waste sites.

 

Abandoned Facility (confidential), Colorado

 

For a consortium of chemical processing companies, AHA managed the removal of approximately 2,500 mixed empty and liquid filled chemical drums from an abandoned recycling facility in Colorado. AHA prepared bid documents, performed contractor interviews and selection, oversaw site activities, controlled contractor payments, prepared a detailed report, and conducted a final walk through with the County’s environmental health specialist.

 

Beaver Valley Chemical Plant, PA

 

AHA designed and oversaw construction of a 2,000 sf drum storage and handling facility, and was responsible for all non-process plant waste streams, including soil and liquids from site characterization and remediation activities. AHA characterized wastes and managed transport to appropriate on- or off-site disposal facilities in accordance with appropriate regulations and permits.

 

RCRA cell design, PA and TX

 

AHA designed and oversaw construction of three RCRA waste management vaults at two chemicals plants in Pennsylvania and Texas. AHA also performed field investigations to determine the as-built construction of a temporary RCRA vault at the Turtle Bayou Superfund Site, Liberty County, Texas, assessed vault design, containment, and performance, and prepared a plan converting it to a temporary bioreactor.

 

Channelview and Bayport Chemical Plants, TX

 

AHA assisted in the design of plant waste management procedures for these two facilities.

 

Prewitt Superfund Site, NM

 

AHA was the Supervising Contractor and Quality Assurance Official (SC/QAO), supervising removal of several wastes, including: asbestos (handled in accordance with the Asbestos Hazard Emergency Response Act (AHEARA); lead-impacted soils (analyzed on site using a portable X-ray fluorescence (XRF) analyzer); and hydrocarbon-impacted soils. Asbestos and lead wastes, plus the hydrocarbon liquid waste stream from remediation operations, and listed waste (FO-37 separator sludges) were shipped off-site. AHA designed an onsite land-farming system for hydrocarbon-impacted soils and was SC/QAO for construction, treatment, and closure. AHA also performed final confirmatory sampling to confirm waste removal.

 

Bluewater Uranium Mill (mine waste) Site, NM

 

AHA prepared the Alternate Concentration Limit (ACL) petition for the Bluewater Uranium Mill, near Grants, NM. This is the first and only ACL Petition that has been approved by NRC and was a key milestone for termination of ground water corrective action and transfer of the site to DOE for perpetual care. This effort included development of risk-based concentrations for hazardous constituents at the potential points of exposure in the alluvial and bedrock aquifers, and ground water transport modeling to relate concentrations at the compliance points to the potential points of exposure.

 

AHA also developed the ground water corrective action programs, prepared the evaluation of ground water corrective action programs, including wick drainage of tailings slimes, and provided technical support on hydrologic aspects of the reclamation plan. Other work at the site has included: preparation of monitoring plans for on-site disposal of PCB contaminated by-product material, preparation of well abandonment plans, report review, interpretation of data, participation in strategy development, and presentations to regulatory agencies.

 

Yerington Mine and Mill (mine waste) Site

 

AHA evaluated surface and ground water impacts and remedial options at the closed Yerington mine and milling operation in Nevada. This work involved monitoring well completion, sampling of soils and waste materials, geophysical investigations, hydrologic testing, groundwater sampling, and isotope studies. Numerical modeling was used to characterize groundwater flows and contaminant migration, to predict future conditions, and to evaluate the effectiveness of remedial alternatives.

 

We are currently responsible for the operation and maintenance of the ground water remediation system. We also completed the design and construction for an expansion of the ground water containment system to adapt to the changing hydrogeologic conditions resulting from water pumping and irrigation in the vicinity of the site. As part of this work, a clay-lined evaporation pond was designed and installed. We provided quality assurance and testing for liner installation. All construction was completed within budget and schedule and constructed treatment systems are currently operating in accordance with the design.

 

Rare Earth Mining and Refining

 

AHA prepared the hydrologic assessment of contamination from a rare earth mining and refining site at Mountain Pass, California. The groundwater at this site had been significantly affected by leakage of a lignin sulfonate chelate from the plant waste ponds and tailings impoundments. The project involved soil and groundwater sampling, environmental impact assessment and development of remedial alternatives.

 

Hydrogeologic modeling

 

Hydrogeologic modeling is applicable to 3 SINs (899-1 and 899-4) and is used extensively for waste management. Applied Hydrology Associates has extensive experience in analytical and numerical modeling to evaluate ground water flow and quality. Modeling is used to assess and project processes in place such as chemical fate and transport and natural attenuation, and predict impacts of engineered interventions such as remedial design.

 

Natural Attenuation Modeling

 

Analytical and numerical transport models were applied to quantify existing and potential future contaminant migration from a former petrochemical disposal lagoon at the French Limited Superfund site near Crosby, Texas. This work was performed as part of a human health and ecological risk assessment and to support the closure of the active remediation system.

 

The residues from waste disposal activities formed a chemical-rich sludge layer at the bottom of the water-filled former pit (lagoon) containing high concentrations of organic constituents including PAHs, PCBs, chlorinated solvents, and low concentrations of metals. Infiltration of dense non-aqueous phase liquid (DNAPL) chemicals and leaching of sludges resulted in widespread contamination of soils and groundwater in the vicinity of the lagoon.

 

Multi-component solute transport modeling was also performed to evaluate the progress of the active in-situ bioremediation system and to predict future water quality following shutdown of the active system. This modeling demonstrated that natural attenuation processes would achieve cleanup objectives within the timeframe dictated by the EPA Record of Decision. This allowed the project to move into a phase of low-maintenance intrinsic bioremediation and long-term monitoring, saving the client several million dollars.

 

Solute Transport Modeling

 

AHA designed and managed the hydraulic containment of groundwater impacted by leakage of acid process fluids from unlined evaporation ponds at a former copper mining and milling operation near Yerington, Nevada. We developed a solute transport model of the site to aid in the characterization of existing impacts, predict future impacts, and simulate the effectiveness of various remediation techniques.

 

Unsaturated Zone Transport Modeling

 

AHA conducted unsaturated vertical transport modeling of benzene using SESOIL software for the Turtle Bayou Superfund Site in Liberty, Texas. This work was used to develop the soil cleanup criteria for the site. The results of the modeling convinced the EPA to allow a less stringent cleanup criterion for benzene in the shallow soils than had originally been proposed. This change resulted in a saving in clean-up costs of several million dollars without compromising the public safety or the environment. Unsaturated zone modeling was also a component of AHA’s integrated modeling work at the Rocky Flats Environmental Technology Site.

 

Modeling of Chemical Transport and Natural Attenuation Processes

 

AHA conducted fate and transport modeling of molybdenum and tertiary butyl alcohol (TBA) in groundwater for the Lyondell Chemical facility near Rotterdam, The Netherlands (LCNL). The model results were part of the site risk assessment that forms the basis for site remediation efforts. The multi-layer modeling showed that natural attenuation of TBA and molybdenum was sufficient so that active remediation efforts at the site were not warranted and that monitoring was an appropriate approach.

 

Modeling of Benzene Transport and Natural Attenuation Processes

 

AHA conducted fate and transport modeling of benzene in groundwater for the Lyondell Chemical facility near Rieme, Belgium (LCPEI). The multi-layer modeling showed that natural attenuation processes occurred rapidly in the shallow aerobic zones and at a slower rate in the deeper anaerobic zones. The model results were used to argue for a risk-based, natural attenuation approach to remediation efforts at the site.

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SIN 899-7: GEOGRAPHIC INFORMATION SYSTEMS (GIS)

AHA uses Geographic Information Systems (GIS) technology and the most up-to-date spatial analytical techniques for scientific investigations, resource management, development planning, and web-based GIS applications (IntraMaps). GIS is a cost effective data management tool that helps manage large amounts of spatial data efficiently and effectively.

 

AHA uses ArcViewã 3.2 with Spatial Analyst and 3D Analyst, and many program enhancing scripts and extensions. Surfer 8, a contouring and 3D surface mapping software, further expands AHA’s GIS capabilities. Some of AHA’s GIS capabilities include:

 

  • Data acquisition/digitizing and conversion
  • Database design, development, and maintenance
  • Raster and vector based spatial analysis
  • Digital elevation model (DEM) analysis
  • Aerial image processing and interpretation
  • Watershed delineation and analysis
  • 3-dimensional surface modeling
  • Surface contouring
  • Sparse data interpolation and geostatistical error analysis

 

AHA has experience using GIS for many different projects in a variety of applications. This experience includes interfacing surface and ground water flow and quality models (MIKESHE and AVSWAT) with a GIS to spatially visualize data. AVSWAT (ArcView Soil and Water Assessment Tool, USDA ARS) is used to predict sediment load and water quality over a watershed. The user can create hydrologic watersheds and user defined hydrologic response units based on soil type and land use.

 

AHA has utilized GIS in the preparation of groundwater models for Environmental Impact Statements for Coal Bed Methane (CBM) development in the Powder River Basin, Wyoming, and the San Juan Basin, Colorado. For integrated surface water–groundwater modeling at the Rocky Flats Environmental Technology Site (RFETS), Golden, Colorado, GIS was used not only for data visualization, but also as the model input/output vehicle for AHA’s MIKESHE simulation software.

 

Geologic, potentiometric, and water pressure surfaces were verified in conjunction with the analysis of surfaces generated from empirical data. Spatial analytical techniques have been used in pilot studies in the Carbon Basin, WY, to help understand the complex hydrogeology of the basin’s coal seams.

 

AHA has extensively used GIS to spatially visualize water quality in support of CBM development regulatory permitting. This has allowed AHA personnel to recognize problem areas as well as potential problem formations, allowing developers insight into future treatment costs.

 

GIS has been used to help characterize and model pollutant plumes and hydrogeologic characteristics on a number of Superfund sites. The delineation of plumes, potentiometric surfaces, geologic layers, and the volume of contaminated constituents in ground water have allowed project managers to make a more informed decision regarding regulatory requirements and cost analysis.

 

AHA is a distributor of IntraMaps, an innovative solution for creating powerful browser-based GIS applications. IntraMaps ties into existing databases and utilizes GIS to display the data via Microsoft’s Internet Explorer.

 

IntraMaps has been designed as a tool for viewing and querying corporate data. It includes a consistent user interface and is extremely easy to use, requiring minimal staff training. The primary benefits of an IntraMaps solution are:

 

  • Allows for central administration and configuration of data and application
  • Lower per-user costs
  • Scaleable application
  • Ease of use
  • High reliability and performance, and
  • Reduced administration associated with client workstations

 

The key to IntraMaps power is in the modular design and the ability to modify and extend functionality via the ‘Configuration Manager’. The modular design provides an intuitive means of integrating many different spatial and a spatial data sets that can be categorized for specific user needs. Each module can contain different spatial data, different database connections and different search criteria; however they all blend seamlessly together from the user perspective.

 

IntraMaps gives the GIS administrator now has the power to configure a single web solution to meet the needs of all corporate GIS users with a standard Internet Explorer web browser.

 

AHA also uses AutoCAD Map 2000â for rectangular coordinate drafting applications and engineering design drawings, and Tralaine 5.0â for coordinate conversion between any standard or user-defined projection, datum, and scale system.

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POSITION DESCRIPTIONS

 

The following Position Descriptions apply to SINs 899.1, 899.2, 899.4, and 899.7.

Only those positions currently filled at Applied Hydrology Associates, Inc. are listed.

 

Category Name/Title

Minimum Education

Minimum Years Experience

Minimum Years Specialized Experience

Business Field

Position Description

Principal

MS in Hydrogeology, Engineering, or related field

25+

25+

Geology, hydrology, environmental engineering 

Client contact, project management, design, and supervision of fieldwork, data analysis, modeling, and report preparation.

Project Manager

MS in Hydrogeology, Engineering, or related field

25+

25+

Geology, hydrology, environmental engineering

Project management, design, and supervision of fieldwork, data analysis, modeling, and report preparation.

Senior Hydrogeologist/

Engineer V

MS in Hydrogeology, Engineering, or related field

15+

15+

Geology, hydrology, environmental engineering

Design, supervision, and implementation of fieldwork, data analysis, modeling, and report preparation.

Senior Hydrogeologist/

Engineer II

BS in Hydrogeology, Engineering, or related field

15+

15+

Geology, hydrology, environmental engineering

Design, supervision, and implementation of fieldwork, data analysis, modeling, and report preparation.

Hydrogeologist VIII

MS in Hydrogeology, or related field

12+

12+

Geology, hydrology

Supervision and implementation of fieldwork, data analysis, modeling, and report preparation.

Engineer VIII

BS in Engineering, PE

8+

8+

Environmental engineering

Supervision and implementation of fieldwork, data analysis, modeling, and report preparation.

Hydrogeologist VI 

MS in Hydrogeology or related field

7+

7+

Geology, hydrology

Supervision and implementation of fieldwork, data analysis, modeling, and report preparation.

Engineer VI 

BS in Engineering

6+

6+

Environmental engineering

Implementation of fieldwork, data analysis, modeling, and report preparation.

Hydrogeologist/

Engineer V

MS in Hydrogeology, Engineering, or related field

6+

6+

Geology, hydrology, environmental engineering

Implementation of fieldwork, data analysis, modeling, and report preparation.

Hydrogeologist/

Engineer IV

MS in Hydrogeology, Engineering, or related field

4+

4+

Geology, hydrology, environmental engineering

Implementation of fieldwork, data analysis, modeling, and report preparation.

Scientist/

Engineer II

BS in Hydrogeology, Engineering, or related field

2+

2+

Geology, hydrology, environmental engineering

Implementation of fieldwork, data analysis, modeling, and report preparation.

Hydrology Technician

Experience as a Hydrology Technician 

10+

10+

Hydrology Technician 

Implementation of fieldwork and report preparation.

Senior Administrative I

 NA

NA

NA

Secretarial, Clerical

Secretarial, clerical, administrative, and data management.

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2004 - 2005 SCHEDULE OF RATES BY CLASSIFICATION

 

Professional Fees

 

Principal

$110.83

Project Management

$105.79

Senior Hydrogeologist/Engineer V

$100.75

Senior Hydrogeologist/Engineer IV

$95.71

Senior Hydrogeologist/Engineer III

$90.68

Senior Hydrogeologist/Engineer II

$85.64

Senior Hydrogeologist/Engineer I

$80.60

Hydrogeologist/Engineer VIII

$75.56

Hydrogeologist/Engineer VII

$70.53

Hydrogeologist/Engineer VI.

$65.49

Hydrogeologist/Engineer V.

$60.45

Hydrogeologist/Engineer IV

$55.41

Hydrogeologist/Engineer III

$50.38

Scientist/Engineer II

$48.86

Scientist/Engineer I

$45.34

Sr CADD/Drafting

$50.38

CADD/Drafting

$45.34

Field Technician IV

$45.34

Field Technician III

$42.82

Field Technician II

$40.30

Field Technician I

$38.79

Sr. Administrative II

$45.34

Sr. Administrative I

$42.82

Administrative II

$38.79

Administrative I

$32.74

 

 

 

Expenses and Field Equipment

 

Computer & Software Time (specialized modeling, etc.) per hour

$15.00

Plotter Time - Black and White per sq. ft

$1.00

Plotter Time - Color per sq ft

$2.00

Photocopying and Printing per page

$0.10

Color Copies/Printing per page

$1.50

Report Binders (depending on type and size used) min

$1.50

Report Binders (depending on type and size used) max

$8.00

Report Indexes (depending on type and size used) min

$1.50

Report Indexes (depending on type and size used) max

$6.00

AHA Truck per day

$45.00

200 psi/9 scfm Air Compressor per day

$15.00

5 hp Generator and Submersible Pump (up to 1 hp) per day

$15.00

HNu Meter per week

$125.00/wk.-$500.00/mo.

Inflatable Packer per week

$50.00

Bladder Pump per week

$50.00

Peristaltic Pump per week

$50.00

Bailer per week

$25.00

Water Level Meter and Probe per week

$50.00

Interface Probe per week

$100.75

PH, Conductivity, Temperature Meter per day

$50/day-$160/wk-$490/mo.

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For More Information, Contact our Home Office at (303) 782-0164
Or send us an e-mail.