Environmental Services

Remedial Investigation

Remedial Planning

• Data quality objective development
• Dynamic work plans with decision rule flexibility
• Risk-based remediation goal development

Studies, Modeling, and Analysis

• Preliminary assessments/site investigation/HRS scoring
• Remedial investigation/feasibility studies
• Risk assessment—Human health and ecological
• Natural resources and ecological assessment
• Groundwater and storm water modeling
• Data validation and usability evaluation

Field Activities

• Multimedia sampling and field analytical services
• Treatability and pilot studies
• Land surveys and GPS positioning

Web-based Data Management

• Secure, site-specific project websites
• Electronic database and visualization tools

Triad Approach

• Systematic Planning and Negotiation
• Dynamic Work Strategies
• Real-time Measurements
• Design Operation and Maintenance

OTIE delivers remediation investigations, assessments, and studies that include work plans, multi-media sampling, integrated field analytical support, hydrogeologic modeling, and geotechnical investigations, as well as risk assessment, treatability studies, and report preparation. OTIE applies value-added innovative investigation techniques to maximize the data returned on investment.

OTIE tailors remedial planning to fit the needs of each customer. Where remedial design is expected, we typically collect anticipated geotechnical data during remedial investigation to minimize the need for repeated investigation. We typically integrate environmental assessments with site investigations to address ecological and human health risks.

	In Maywood, CA, OTIE performed a CERCLA RI/FS at the Pemaco Superfund Site which was developed as a city park. OTIE developed dynamic work plans with field decision rules and provided onsite analytical support. OTIE developed real-time data to determine VOC profiles versus depth and rapid in-field delineation of NAPL zones. Managed 575,000 analytical records and 197,000 field records and a GIS database.
	At the Nascolite Superfund Site in NJ, OTIE used direct push soil sampling and field analytical methods (XRF and PID) to characterize soil to optimize onsite excavation and staging of 67,000 tons of soil contaminated with lead and methylmethacrylate.
	OTIE performed site investigations for a CERCLA EE/CA at the Estech Site, Calumet City, IL- multi-media samples included auto fluff, soil, and sediment. Using historical data, we reduced redundancy and decreased original sampling scope by 30% while meeting investigation goals.