Indoor Environment

Sigma understands the indoor environment and employs industrial hygiene principles to scientifically collect, analyze, and report data to assist our clients with making sound, informed decisions. Sigma is acutely aware of the special concerns related to construction and renovation activities in healthcare and manufacturing facilities. Bad air is bad for people and bad for product quality when a clean environment is critical to patient care and manufacturing success. Sigma works closely with healthcare professionals to develop appropriate risk-based monitoring strategies to ensure a safe environment for patients and staff. Sigma is also familiar with worker exposure issues and conducts employee exposure monitoring to chemical stresses (gases, dusts, fumes, mists, and vapors), and physical stresses using NIOSH, OSHA or other approved sampling methods. The exposure determinations are compared to current regulatory limits to determine if exposures exceed specified limits.

Sigma's services consist of monitoring the following:

• Asbestos & silica
• Biological agents (mold, bacteria)
• CO & CO2
• Heavy metals
• Noxious odors
• Oil mists
• Particulate matter
• PCBs
• Radon
• SVOCs, VOCs, methane
• Temperature & relative humidity
• Other process exposures

Sigma provides rapid turnaround evaluations including concise reports which provide a comprehensive evaluation of building systems, lAG complaint driven assessments, and employee exposure issues in the workplace. Sigma also provides the following additional services to evaluate employee exposure and process system related issues.

Drinking Water Sigma samples and evaluates well water and other potable water systems to determine compliance with the Safe Drinking Water Act (SDWA) standards. Additionally, Sigma samples potable water systems for biological agents including Legionella and Mycobacteria.

Noise Occupational Noise Exposure Standard and Hearing Conservation Amendment requires hearing protection for any workplace operations resulting in noise exposures in excess of 85 dBA TWA. Sigma conducts noise surveys to determine if hearing protection and a Hearing Conservation Program is required.

Vibration Sigma conducts monitoring to evaluate manufacturing and demolition activities in areas sensitive to vibration damage including neighboring residential properties and industrial and healthcare facilities with precise operations. Vibration sources may include building demolition and renovation activities involving select or total building dismantling, foundation construction/pile driving, and manufacturing operations such as stamping and punch presses.

Biological Assessment Sigma provides air quality and building material assessments for biological agents including bacterial and fungal organisms, allergens, and microbial VQCs. Sigma minimizes liability risks by using state of the art inspection and assessment techniques recommended by the ACGIH, EPA, New York City Department of Health and Mental Hygiene, and the University of Minnesota Department of Environmental Health and Safety. Services include air and material sampling and evaluation, pre­purchase condition assessments, material moisture assessments, and mold abatement observation and clearance monitoring.