Industries We Serve

We support wastewater treatment plants, composting and organics recycling, landfills and transfer stations, food and beverage processing, rendering, agriculture, asphalt and chemical manufacturing, data centers, and energy facilities.

Odor and noise are regulated through a mix of state nuisance provisions, numeric limits in some states, local ordinances, and permit or zoning conditions. Every assessment we perform starts by confirming which criteria apply where your facility operates.

Services

Odor Air Dispersion Modeling

We predict where, how often, and how strongly odors from your facility may be detected, then use those predictions to guide permitting and control decisions.

• Odor emission rates: source-specific odor emission rates developed from olfactometry results, published factors, or process data

• Model selection and setup: AERMOD for near-field regulatory analyses, and CALPUFF where longer distances or complex wind fields call for it

• Meteorology: multi-year, site-representative meteorological data processed for the selected model

• Short-term peaks: peak-to-mean adjustments that reflect the brief exposures people actually notice

• Percentile and frequency results: odor concentration contours (ouE/m³) at the percentile and averaging time the applicable criteria require, plus how often impacts are predicted at each receptor

• Buildings and terrain: building downwash and near-field effects evaluated with BPIPPRM, and terrain handled with AERMAP

• Complaint analysis: model results compared with complaint records and wind data to pinpoint contributing sources

• Abatement planning: stack height, enclosure, and odor control scenarios compared before you invest

Odor Assessment

• Source inventories: site walkthroughs that identify and rank odor sources

• Field odor surveys: trained-observer surveys and complaint investigations at the property line and nearby receptors

• Odor sampling: sample collection coordinated with accredited olfactometry laboratories

• Screening: hydrogen sulfide and reduced sulfur compound monitoring

Noise Assessment and Modeling

We measure existing sound levels, predict future ones, and identify practical mitigation.

• Baseline sound monitoring: ambient sound surveys at property lines and nearby receptors before a project is built

• Predictive noise modeling: three-dimensional sound propagation models built from equipment sound power data

• Low-frequency and tonal analysis: octave-band and one-third-octave-band evaluation of fans, transformers, generators, and cooling equipment

• Mitigation evaluation: barriers, enclosures, silencers, and equipment layouts compared by predicted benefit

• Post-construction monitoring: compliance measurements and complaint investigations after equipment is operating

Permitting and Agency Support

• Impact reports: odor and noise evaluations for air permits, zoning, and site plan approvals

• Management plans: odor management and noise control plans

• Agency response: support for complaints, notices of violation, and agency orders

• Due diligence: review of nuisance history, permit conditions, and related liabilities for acquisitions

Talk to Us About Your Odor or Noise Concern

Planning a new facility, receiving complaints, or facing a permit condition? Contact us to talk through your project.