
Indoor Air Vapor Assessment
Vapor intrusion occurs when volatile chemicals from contaminated soil or groundwater migrate into buildings through cracks and openings in foundations, potentially exposing occupants to harmful substances. Haller & Associates provides comprehensive indoor air vapor assessments to evaluate vapor intrusion risks, protect building occupants, and support informed property decisions.
Understanding Vapor Intrusion
Vapor intrusion is a complex pathway where volatile organic compounds from subsurface contamination enter buildings through foundation cracks, utility penetrations, and other openings. Contaminants such as petroleum hydrocarbons, chlorinated solvents, and other industrial chemicals can volatilize from soil or groundwater and migrate upward into indoor air spaces. This process can occur in homes, offices, schools, and commercial buildings located on or near contaminated sites.
Health concern: Long-term exposure to certain vapors can pose health risks. Indoor air vapor assessments identify potential exposure pathways and quantify contaminant levels to determine if mitigation is necessary.
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When Is an Indoor Air Vapor Assessment Needed?
Vapor assessments are recommended for buildings in several situations:
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Properties located on or adjacent to known contaminated sites
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Buildings near former industrial facilities, dry cleaners, or gas stations
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Sites with subsurface petroleum or chlorinated solvent contamination
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Properties undergoing environmental due diligence investigations
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Buildings where occupants report unusual odors or health concerns
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Compliance with state or federal vapor intrusion guidance
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Properties seeking environmental clearance for development or sale
Our Vapor Assessment Services
We conduct thorough vapor intrusion investigations following EPA and state regulatory guidance:
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Site evaluation and conceptual model development to assess vapor intrusion potential
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Sub-slab soil vapor sampling beneath building foundations
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Indoor air sampling in occupied and unoccupied spaces
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Outdoor ambient air sampling for background comparison
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Building pressure differential measurements
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Analysis for volatile organic compounds and petroleum hydrocarbons
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Data interpretation using risk-based screening levels
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Comprehensive reporting with risk assessment and recommendations
Multi-Phase Investigation Approach
Vapor intrusion investigations often follow a tiered approach. Initial screening may involve sub-slab soil vapor sampling to determine if indoor air testing is warranted. If screening indicates potential concern, indoor air sampling provides direct measurement of occupant exposure. Multiple sampling events may be conducted across different seasons to account for seasonal variations in vapor transport. This phased approach ensures cost-effective investigation while providing thorough risk evaluation.
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Mitigation and Solutions
If assessment results indicate unacceptable vapor intrusion, several mitigation options exist. Sub-slab depressurization systems actively vent vapors from beneath building foundations before they can enter indoor spaces. Sealing foundation cracks and penetrations reduces vapor entry points. Enhanced ventilation systems improve air exchange rates. We help clients evaluate mitigation alternatives and implement effective solutions that protect building occupants.
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Why Choose Haller & Associates?
Our environmental consultants have extensive experience conducting vapor intrusion assessments in New Mexico and understand evolving regulatory guidance. We use proper sampling protocols, quality-assured analytical methods, and scientifically sound risk evaluation approaches. Our clear reporting helps property owners, developers, and regulatory agencies understand vapor intrusion risks and make informed decisions about building safety.
Concerned About Vapor Intrusion?
Contact Haller & Associates with the button below for professional indoor air vapor assessment services that protect building occupants and property investments.