Indoor Air Assessment at a Large Manufacturing Facility
Cox-Colvin was contracted to complete an indoor air quality assessment at a large, multi-structure robotics manufacturing facility in the Midwest. Previous indoor air investigations had been conducted at the site related to vapor intrusion (VI) of chlorinated volatile organic compounds from soil and groundwater at the site. Tetrachloroethene (PCE) and trichloroethene (TCE) were initially detected within indoor air at values exceeding the VI screening levels, which led to the incorporation of engineering controls. The facility was recently purchased, and the new owner wanted to verify compliance with current EPA commercial indoor air action levels.
Because of our extensive experience and expertise in VI investigations, Cox-Colvin was selected to conduct the assessment. Cox-Colvin completed an 8-hour indoor air sampling campaign to replicate the exposure scenario using “Summa” canisters placed in multiple buildings across the site. While on site, Cox-Colvin also conducted a thorough product inventory. Only one compound exceeded the indoor air VI screening concentration, however, it was used throughout the facility in machining processes, and was unlikely to be the result of VI. The target chemicals of concern, PCE and TCE, were determined to be below the applicable indoor air VI standards.