Indoor Air Quality Investigation

ENW’s Indoor Air Quality Division can be a valuable consulting resource by providing solutions to help eliminate and improve Indoor Air Quality problems.  ENW provides a wide range of services to address Indoor Air Quality problems, including testing, mitigation, renovation, and demolition, as either independent project supervision or as a turnkey solution. 

ENW offers the assessment and remediation of:

·         Mold and mildew

·         Intrusion of volatile organic compounds

·         Asbestos

·         Radon

·         Dust

·         Lead-based paints

ENW performed, contracted, and supervised these services in residential, commercial, and industrial settings.  The staff have performed numerous assessments of asbestos, lead-based paint and radon, typically as part of an extended scope Phase I Environmental Site Assessment, or as part of an additional phase of investigation associated with multi-family dwellings and/or single-family dwellings throughout the Northwest and Northern California.   


ENW has provided independent unbiased evaluation and analysis of radon problems in the Northwest since 1990. We specialize in radon testing and radon entry analysis in homes, condos, apartments, schools and complex commercial buildings.   ENW maintains staff that are certified in radon measurements.  Services we offer include:

·         Radon Analysis and Radon Measurement

·         Radon test program development, execution and monitoring

·         Large project, short & long term protocol radon testing

·         Apartment, multi-family & commercial building radon testing

·         Radon potential evaluation for building sites & unimproved land

·         Radon soil gas measurements

·         Gamma radiation surveys

·         Mitigation system design, testing, evaluation & certification

·         Utilizing HVAC modifications & air pressurization

·         Radon source and entry path investigations in complex buildings

·         Pre-construction radon mitigation system design


School Building Sandy, Oregon

In response to a teacher’s complaint with regards to health impacts potentially related to indoor air quality issues, ENW was consulted to evaluate indoor air in a specific area of the school building. ENW collected several samples of indoor and outdoor air, following national standards of practice and implementing strict Quality Control/Quality Assurance measures. In addition, ENW assessed the general air quality in relation to conditions necessary to support mold growth (moisture, relative humidity and temperature). ENW surveyed accessible areas of the building for possible indications of moisture intrusion and moisture impacted building materials using a moisture probe. The project was documented in a final report approved by the client.

Residence Portland, Oregon

The residence at this property had caused health impacts to the residents. ENW, acting on behalf of a national insurance company, performed the mold assessment and remediation of the site. Strict Quality Control/Quality Assurance measures were implemented. Each article in the house was inventoried, cleaned, wrapped, and either restored after remediation or isolated for future disposal. The project was documented in a final report approved by the insurance carrier. 

Residence Clackamas County, Oregon

An assessment performed in this dwelling identified areas of the attic and kitchen ceiling and window as impacted with toxic microbial growth. ENW supervised the contractors in performing the mold remediation, implementing Quality Control/Quality Assurance measures to prevent re-infestation from previously treated areas of the structure. ENW also ensured that all impacted areas were addressed by remedial measures. Baseline samples were compared with the closure sampling results in the final project report, thereby documenting the effectiveness of the remediation.