1600 Specht Point Road    Suite 209    Fort Collins, CO 80525    Ph 970.488.3111    Fax 970.488.3112      

 


GEOENVIRONMENTAL SITE ASSESSMENT AND REMEDIATION

The following are representative projects performed by personnel of Engineering Analytics, Inc.

Click Here to download our SOQ of Geoenvironmental Site Assessment and Remediation Project Sheet. 

 


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EA provides management consulting and technical services in four principal business areas:

  

 

GROUNDWATER TREATMENT SYSTEM DESIGN CONSTRUCTION AND OPERATION, FULLERTON, CALIFORNIA

  


Engineering Analytics staff provided engineering services for the design, construction and operation of a 600 gallon per minute (gpm) groundwater treatment system at the Hughes Aircraft Company (HAC), Ground Systems Group Facility in Fullerton, California. The design included extraction and treatment of contaminated groundwater and subsequent re-injection at a location downgradient of the site in order to provide a hydraulic barrier to contain the groundwater plume. An innovative system of six intersecting horizontal wells replaced over 90 vertical wells in the main groundwater plume area. The treatment train consisted of a 43-foot tall air stripping tower, as well as liquid and vapor phase carbon adsorbers. Four injection wells, located one-half mile downgradient, were used to re-introduce the treated water to the groundwater system.
 

 


 
 

MULTIPLE SITE ASSESSMENTS AND REMEDIATION, CAPE CANAVERAL, FLORIDA

  
 


Engineering Analytics staff directed the assessment of more than 20 potentially hazardous sites at Cape Canaveral Air Station Florida. Included in the site investigations were five former Launch Complexes, and numerous support facilities. Contaminant concerns ranged from petroleum to chlorinated solvents and heavy metals. Assessment activities included soil and groundwater sampling, soil gas sampling, borehole logging, hydrogeologic testing, and use of geophysics (e.g. ground-penetrating radar) and other innovative assessment techniques such as Membrane Interface Probes (MIP) and Waterloo® samplers. EA staff directed remediation activities at several of these sites including soil removal and capping, groundwater extraction and treatment, design and installation of air sparging walls, and soil vapor extraction.
 

 
 

PCB ASSESSMENTS AT MULTIPLE SITES, EASTERN UNITED STATES

  
 


Engineering Analytics staff directed a PCB assessment for a major natural gas pipeline extending from the Gulf of Mexico to the northeastern U.S. The program included collection of soil, groundwater, surface water, sediment, and biota samples according to very strict USEPA protocol. EA staff coordinated more than ten sampling teams working in eight States to ensure consistency in approach and adherence to the sampling protocols. Because of the tendency of PCB’s to accumulate in living organisms, innovative approaches to sampling biota from frogs to grazing cattle were developed. This “indicator species” sampling strategy was developed, in part, by EA personnel and resulted in extensive cost savings by reducing the number of samples that were collected by up to 40 percent.

 


 
 

RAILYARD ASSESSMENT AND REMEDIATION, LAKELAND, FLORIDA

  
 


Engineering Analytics staff directed the assessment of a more than 100-acre railyard in Lakeland, Florida. The primary risk driver was arsenic. Previous consultants had collected more than 300 samples, but were unable to address the regulatory concerns. The site was being re-developed as a Brownfield’s property, and EA staff were asked to expedite the assessment process with a limited number of samples. Using an innovative statistical approach that combined site drainage conditions with detailed operations maps, the assessment was completed to the satisfaction of the regulators in just 3 months with approximately 50 additional samples being collected. This allowed site re-development to proceed on schedule.
 


 
 

SOIL AND GROUNDWATER REMEDIATION, ESCONDIDO, CALIFORNIA

  
 


Engineering Analytics staff designed, installed, and operated a treatment plant to extract and treat groundwater contaminated with PCE, TCE, and other VOCs. The treatment plant used a UV/chemical oxidation system to destroy the contaminants. A soil vapor extraction system was installed providing treatment of the vadose zone soils. Shallow soils contaminated with PCBs and heavy metals were excavated and removed from the site. A soil cover was placed over the entire site to limit the potential for wind-blown contaminants escaping, and to prevent trespasssers from coming in contact with the contaminated soil.
 


 
 

SUPERFUND SITE REMEDIATION, ST. DAVID, ARIZONA
Apache Powder Superfund Site, St. David, Arizona

  
 


Engineering Analytics staff prepared the RI/FS and remedial design for six areas of contamination at the Apache Powder Superfund Site. Contaminants of concern included nitrates and perchlorates, arsenic, and the explosives 2,4-DNT and 2,6-DNT, TNT, and PETN. Soil contamination was remediated by excavation, on-site open burning or detonation, and off-site disposal. Groundwater was treated by constructing a 4.5-acre wetland. The treatment wetland was designed as a gravity flow treatment system capable of treating 210 gpm. Treated groundwater was returned to the San Pedro River. The treatment wetland saved the owners over $40M over the next lowers cost treatment options.

 

  
 

GROUNDWATER ASSESSMENT AND TREATMENT, PENSACOLA, FLORIDA

  
 


EA staff completed a detailed geochemical assessment to determine why arsenic levels were elevated downgradient of a closed landfill. The results indicated that anoxic conditions, brought about by the presence of landfill waste, had initiated a series of chemical reactions that resulted in the mobilization of arsenic and iron downgradient of the site. These elements were then discharged to a nearby creek, resulting in unsightly red staining and a reduction in the number and type of biota inhabiting the creek. EA staff developed an innovative, passive remedy that involved collection of rainwater from the landfill surface and construction of aerated ponds downgradient of the landfill. The oxygen-rich rainfall was conveyed to the ponds, where further oxidation using aerators was completed. The highly-oxygenated water infiltrated into shallow groundwater through the ponds, thereby immobilizing the arsenic in-situ at a fraction of the cost of an active pump-and-treat system.

 


 
 

CLOSURE OF CHROMIUM SITE, ELIZABETH NEW JERSEY

  
 


Engineering Analytics staff completed the first successful natural attenuation demonstration for chromium in the State of New Jersey, thereby saving their client several million dollars. The geochemical demonstration used an non-traditional “assimilative capacity” analysis to make the case that the amount of iron available naturally in the soils surrounding the chromium contamination was many times greater than the amount necessary to bind up all of the free chromium. The analysis showed that the chromium would never be released to a nearby surface water body, and, over time, would become more and more tightly bound, preventing any future release scenario.

 


 
 

CHLORINATED SOLVENT ASSESSMENT AND REMEDIATION, ORLANDO, FLORIDA

  
 


Engineering Analytics personnel were responsible for the assessment and remediation of a chlorinated solvent groundwater plume in Orlando, Florida. The remediation process consisted of a three-phase treatment system. Contaminated groundwater was injected with a buffer to control pH, followed by lactate (food source) and a bacterial culture KB-1® designed to dehalogenate chlorinated solvents. The injection system was designed so as to re-circulate the injectate, thereby saving costs on both treatment and additional additives. Within one year, total halogenated compound concentrations had decreased (on average) by more than 75%.

 


 

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  Engineering Analytics, Inc.
1600 Specht Point Road, Suite 209
Fort Collins, Colorado 80525
Phone: (970) 488-3111
Fax: (970) 488-3112

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