Indoor Environmental Specialists
Welcome to Environmental Diagnostics Corporation (EDC). Managing indoor environments is easier with the proper documentation from experienced professionals. Our highly commended proactive, reactive, and mold assessments, cutting edge sampling methods, and interpretative tools make EDC a leader in the industry.
Indoor Air Quality: Proactive The value of a Proactive Indoor Air Quality Program is demonstrated by the value added to a property. An indoor air quality monitoring program shows a property manager or owner’s concern for tenant well-being, a desire to maintain good tenant relations, and to decrease complaints translating into tenant retention. The cooperative partnership established with building operations staff maximizes maintenance efforts and reduces potential operations problems. Documentation of an independent building assessment provides liability protection while supporting the asset value of the property.

Temperature & Humidity The winter and summer comfort zones overlap in the 73F to 75F range. In this temperature zone, people in the summer type clothing may tend to feel slightly cool whereas those in winter dress may tend toward feeling slightly warm.

Ventilation & CO2 Carbon dioxide measurements in a commercial building are typically the most economical way to determine ventilation performance. Two methods of recording carbon dioxide levels are possible:

Odor Investigations Ventilation rates, HVAC system performance, temperature, and humidity can also affect the intensity of odors. Odors can be in particulate or gaseous (fume, vapor, mist, etc.) form.

Volatiles Product outgassing can cause Volatile organic compounds VOC concentrations to persist in the indoor air for an extended period. Factors that affect indoor concentrations and therefore the degree of exposure, include: ventilation exchange rates, temperature, humidity, and the characteristics of the source itself.

Particulates Dust and airborne particulate matter, whether indoors or outdoors, can affect many aspects of everyday life. Epidemiological studies have shown a strong association between small sized respiratory dust and increased morbidity and mortality.

Microbials Many bacteria, especially anaerobic ones, produce odorous MVOCs that microbiologists use to identify bacterial isolates.

Drinking Water The Safe Drinking Water Act of December 16, 1974 mandated the establishment of drinking water regulations. The U.S. EPA was authorized to set national drinking water regulations and oversee the implementation of the SDWA. State governments through their health departments or environmental agencies were to accept the responsibility for the implementation and enforcement of the SDWA's provisions.


Lead in Water Sampling and analysis should determine if soluble lead is in the drinking water supply above the EPA action level of 20 ppb for commercial buildings or schools and 15 ppb for residences.

Legionella Of the many concerns associated with indoor air quality, one of the most feared yet preventable is the presence of Legionella bacteria. This bacteria is associated with Legionnaires' disease as well as Pontiac fever, both of which are increasingly common and serious health concerns.


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Environmental Diagnostics Corp.2013