title: A multi-year field olfactometry study near a concentrated animal feeding operation.
abstract: This study developed and tested a protocol for monitoring odors near a Concentrated Animal Feeding Operation (CAFO). The Nasal Ranger, a portable field olfactometry instrument, was used by a panel of trained individuals to conduct the monitoring near a swine CAFO. Monitors were selected based on olfactory sensitivity, scheduling availability, and lack of association with the CAFO or residential neighbors of the CAFO. Monitors were trained to use the Nasal Ranger, collect and record weather data, and characterize any odors detected. Data were collected over a 3-year period (2007-2009) for approximately 9 months each year. The data recorded included odor intensity, a description of the odor, date and time of the reading, and weather conditions. Of more than 50,000 readings, forty-one (0.1%) odor readings had a dilution to threshold ratio (D/T) of +/- 7:1 and were attributed to hog manure. The frequency of odor readings attributed to hog manure with D/T +/-7:1 was found to negatively correlate with log wind speed and positively correlate with wind from the direction of the farm. Other meteorological variables (temperature, precipitation, cloud cover) and time of day did not influence the frequency.
authors.affiliation: Monell Chemical Senses Center, Philadelphia, Pennsylvania 19104, USA. pdalton@pobox.upenn.edu
authors.forename: Pamela
authors.initials: P
authors.lastname: Dalton
authors.forename: Edward A
authors.initials: EA
authors.lastname: Caraway
authors.forename: Herman
authors.initials: H
authors.lastname: Gibb
authors.forename: Keri
authors.initials: K
authors.lastname: Fulcher
mesh_terms: D000328:Adult; D000393:Air Pollutants / Q000032:analysis*; D000821:Animal Feed; D000822:Animal Husbandry; D000818:Animals; D004784:Environmental Monitoring; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008923:Missouri; D009812:Odorants / Q000032:analysis*; D012621:Seasons; D013552:Swine; D055815:Young Adult
chemical_list: D000393:Air Pollutants