Passive Air Monitoring System (PAMS) Data

Shell Polymers Monaca conducts bi-weekly passive sampling for chemicals of potential concern, including benzene, 1,3-butadiene, n-hexane, naphthalene, and toluene. The site has 20 Passive Air Monitoring System (PAMS) locations.

The PAMS samples are collected and analyzed in accordance with 40 CFR 63.658(e)(1)-(2). These regulations prescribe methods for passive absorption sampling in which clean, absorbent tubes are deployed and collected every two weeks and sent to a third-party analytical laboratory for analysis. Upon collection of the used sampling tubes, a new set of tubes are deployed to begin sample collection for the next two-week period. Benzene concentration delta [or (Δc)] is reported from the two-week sample period and is calculated using the minimum and the maximum individual monitoring point sample results. If the two-week Δc is greater than the applicable action threshold, an investigation is initiated within 24 hours.

Passive Air Monitoring System (PAMS)

Fence Line Monitoring (FLM) Program

Shell Polymers Monaca conducts bi-weekly passive sampling for chemicals of potential concern, including benzene, 1,3-butadiene, n-hexane, naphthalene, and toluene. Shell has installed Passive Air Monitoring Systems (PAMS) at 20 locations on-site, and four Continuous Air Monitoring Systems (CAMS) on its property.