Table I.

Comparison of unadjusted geometric means of toxicant concentrations inside 3 swine hoop buildings and 4 conventional confinement buildings, each sampled on 10 occasions. P values are shown for paired T-tests comparing hoops and confinements by sampling day.

Toxicant	Hoops N=30	Confinements N=40	P value
	GM (GSD) Range	GM (GSD) Range
Inhalable Endotoxin, EU/m3	3250 (4.9)	3100 (5.8)	0.40
	48–37,700	59–57,800
Inhalable PM, μg/m3	1400 (5.9)	1910 (2.1)	0.39
	10–5470	160–7050
Hydrogen Sulfide, ppb	19.6 (2.8)	146 (2.3)	0.004
	1.0–186	15–913
Odor Threshold, dilution	137 (1.8)	428 (2.0)	0.014
	53–440	149–1810
Total Microbes. org/m3	3.01×106 (5.1)	1.49×106 (4.9)	0.012
	0.02×106–18.0×106	0.018×106–12.2×106
TSA Mesophilic Bacteria, cfu/m3	157×104 (3.9)	6.31×104 (4.1)	0.030
	14.8×104–1800×104	0.21×104–82.4×104
R2A Mesophilic Bacteria, cfu/m3	85×104 (3.6)	6.48×104 (4.7)	0.030
	4.18×104–1590×104	0.21×104–82.1×104
MEA Fungi, cfu/m3	2.83×104 (4.0)	2.05×104 (4.1)	0.84
	0.21×104–42.8×104	0.21×104–20.9×104