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Limited Microbial Evaluation Roseville Fire Station Building Roseville, Minnesota ATC Project No. 22.25172.0003 November 17, 20016 Page 4 conducted at the site, ATC is of the opinion that a reservoir of PeniicilliumlAsperkiillus and Basidiospories types of mold exists in or near the Fire Fighter's Day Room RECOMMENDATIONS Based upon the above observations and results, ATC recommends: 1. ATC recommends additional, intrusive investigation to locate the reservoir of mold in or near thle Firefighter's Day Room. 2. ATC recommends additional sampling of the air within the site to measure Volatile Organic Compound (VO1Q gases, such as methane, as a result of the potential gas release from the dry sanitary sewer traps within the basement area. 3 ATC recommends sampling for Carbon Monoxide (CO) within the basement area to determine the extent of combustion gas discharge from the water heater as it relates to the chimney and open condition of the chimney. ATC also recommends assessing the function of the chimney, such as determining if the chimney is clogged with bird nests or other matter,. This condition should be remedied to ensure the draft effect needed from the chimney is functioning properly. ATC also recommends replacing the cover of the chimney. LIMITATIONS This report has been prepared to assist City of Roseville, Inc. in evaluating the microbiological impact at the Roseville Fire Station 'located at Woodland and Lexington, in the City of Roseville, Minnesota 55113. ATC provided these services consistent with the level and skill ordinarily exercised by members of the profession currently practicing under similar conditions. This statement is in lieu of other statements either expressed or implied. This report is intended for the sole use of City of Roseville, Inc. The intent of the report is to aid the building owner, architect, construction manager, general contractors, and potential demolition and abatement contractors in locating fungi growth (mold). This report is not intended to serve as a bidding document nor as a project specification document and actual site conditions and quantities should be field-verified. The scope o f services performed in execution of this evaluation may not be appropriate to satisfy the needs of other users, and use or re-use of this document, the findings, conclusions, or recommendations is at the risk of said user. Although gh a reasonable attempt has been made to locate suspect fungi (mold) in the areas identified, the inspection techniques used are inherently limited in the sense that only full demolition procedures will reveal all building materials of a structure and, therefore, all areas of potential fungal growth. The size of the area impacted by fungal growth is based on professional judgment and practicality. Additionally, other possible building material hazards such as asbestos and lead -based paint were not included as part of this evaluation and may require proper sampling for identification prior to disturbance. Other unidentified microbiological impact may be located within walls, ceiling cavities, below flooring or grade, and other non- accessible areas. Caution should be used during any remediation activities. Additionally, the passage of time may result in a change in the environmental -characteristics at this site. This report does not warrant against future operations or conditions that could affect 'the recommendations made. The results, findings, conclusions, and recommendations expressed in this report are based only on conditions that were observed during ATC's 'Inspection of the site. C-4 208925v4