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Existing GuideHnesfflealth Concerns for Fungi <br />mechanically ventilated buildings With adequate filtrafion,, the American Conference of <br />Govenunental IndustTial Hygienists (ACGER) has indicated that indoor bi,oaerosol levels should b <br />less th�an the outdoor levels and the predominant species to be similar., (2) The publication also <br />reconimends the interpretation of bi <br />ioaerolsiol data based, on a combinafion of the following; <br />4 indoor/outdoor concentration ratios', <br />* a compan'son of species composition indoors and outdoors, and <br />+ the presence of "indicator s�pec,ies" (those that indicate excessive moisture or a, specific <br />health hazard) isolated from the indoor environment. <br />3. For bulk, samples ofbuildig matenials, analyzed by a dilution method, the following numbers are <br />rough rules of' thumb used to assess fimgal contamination in duct insulation. In consultation wiit <br />N. G. Carlson, these guidelm'es have been applied to laboratory analysi's of' a variety of porous <br />material bulk samples. I <br />\\Ntserver\[EA\CIicnt FilesNOCity of'RosevilleWR021-6978-1 301 - City of Roseville Fire Sitatioln Ldoc - sda <br />