Our Services

The staff of scientists and engineers at Letterle & Associates has been solving environmental problems and effectively remediating sites for clients for more than 15 years.

Our experience includes designing and operating various types of remediation systems, such as: Dual phase (groundwater and soil vapor) extraction, vacuum enhanced groundwater extraction, standard pump and treat, free-phase product recovery, enhanced bioremediation, oxygen and chemical injection, and air sparging. Our innovative and cost-effective approach to remediation services has resulted in returning devalued properties back to productive use. Our remediation services experience includes:

• Remedial feasibility evaluation
• Pilot testing and design
• Remedial action plans
• Engineering design for remediation systems
• Plume control/containment systems
• Cost/benefit analysis
• Construction management services
• Subcontractor management
• Turnkey installation of remediation systems

Letterle & Associates has substantial experience performing environmental investigations and assessments for numerous clients at current and former industrial and commercial facilities. Our staff of qualified professionals has experience in conducting:

• Environmental site investigations and characterizations
• Phase I and Phase II Environmental Site Assessments
• Groundwater fate and transport modeling
• Human health and ecological risk assessments
• Due diligence audits
• Property transfer assistance
• Geophysical investigations
• Aquifer characterization
• Underground storage tank closure assessments
• Vapor intrusion investigation, monitoring, and modeling
• Groundwater modeling and monitoring

Letterle & Associates provides expert knowledge of current environmental regulations and is in daily contact with regulatory officials, working through issues on behalf of our clients.

Our project managers are experts in dealing with the complicated procedures related to state insurance funds. We have been actively involved with the Pennsylvania Underground Storage Tank Indemnification Fund since the inception of the Fund in 1994. We have educated clients about the Fund, assisted with preparing initial insurance claims, and guided claimants through the claim review and approval process. We have extensive experience dealing directly with the Fund managers and their contractors to resolve claim issues.

Permitting is a necessary part of almost any environmental activity. We have assisted clients with every facet of permitting and have helped them make informed decisions about how these permits affect their business. Our permitting experience includes:

• NPDES permitting and sampling
• Wastewater discharge permits
• Waste characterization and permitting
• Spill Prevention Control & Countermeasures plans
• Pollution prevention plans
• Road opening permits
• Site access permits
• Stormwater permitting
• Electrical and building permits
• Injection permits