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evaluation of the HVAC system. Amec Foster Wheeler understands that IRC is in process of repairs and planned remediation activities to address any deficiencies. During the March 31, 2015, site visit, Mr. Smith observed the general investigative and data collection methods and procedures by the two on-site representatives (Derrick and Mel) of Engineering Systems Inc. (ESI) of Fort Myers, Florida, while they conducted assessments intended to identify evidence of water intrusion or microbial growth. Amec Foster Wheeler understands that ESI have been retained by an attorney representing the IRC firefighters union to evaluate interior conditions at IRC Fire Stations 1, 7, 10 and 11. Mr. Smith observed ESI personnel to the extent possible while on site; and either made observations, collected samples or moisture measurements in all areas evaluated by ESI personnel. Mr. Mark E. Hill (Hurley, Rogner, Miller, Cox &Waranch P.A.), Mr. Brian Burkeen (IRC Assistant Fire Chief) accompanied Mr. Smith and provided additional information during the assessments. Note that ESI utilized Mycometer® and Bactiquante test methods to evaluate fungal (mold) and bacterial contamination. These tests rely on detection of enzymes associated with the target organisms to estimate fungal or bacterial biomass. While the technical basis of the Mycometer® method has been evaluated by the U.S. EPA, these tests are not accepted by the scientific community to be a surrogate for actual traditional analysis of fungi on surfaces and the interpretation guidelines associated with the Mycometer®have not been verified by any independent entity. Mycometer®and Bactiquant®are surface sampling techniques and suffer from the same limitations as all mold and bacterial surface sampling techniques. Specifically, these tests (and other surface tests for mold and bacteria) only indicate the presence or absence of materials (e.g. mold, fungi, bacteria, etc.) but provide no information on how or when those materials were deposited or where they originated. In addition, surface sample results provide no information regarding current or past airborne concentrations. For these reasons, surface samples (of all types) have limited utility in mold investigations and are generally used to confirm that a given material is actually mold growth. Surface sample results cannot be used to evaluate the potential for exposure to mold or mold spores. It is widely recognized that air samples, and not surface samples, are more relevant indicators of exposure to mold or other bioaerosols; however ESI did not collect any air samples during this site visit. 3 4 _ _