Table 1 Hygienic measurements in the riding-school stable
Parameters | Round 1 | Round 2 | Round 3 | Unit | Calculated as: |
|---|---|---|---|---|---|
CO2 | |||||
In stable | 990 (550–1280) | 800 (670–900) | 510 (350–750) | ppm | Median (10th–90th percentile) |
Outdoors | 360 (350–370) | 550 (530–660) | 310 (300–350) | ppm | Median (10th–90th percentile) |
Ammonia | na | 3212 | 1330 | μg/m3 | Median |
Relative humidity | |||||
In stable | 73 (41–84) | 79 (65–83) | 86 (58–97) | RH% | Mean (range) |
Outdoors | 88 (66–94) | 76 (43–97) | na | RH% | Mean (range) |
Temperature | |||||
In stable | 8 (7–15) | 21 (19–24) | 8 (6–12) | °C | Mean (range) |
Outdoors | 6 (5–10) | 21 (19–30) | 6 (2–15) | °C | Mean (range) |
Total dust | 210 (210–790) | 220 (100–250) | 200 (160–290) | μg/m3 | Mean (range) |
Respirable dust | 100 (60–270) | 70 (60–210) | 130 (40–410) | μg/m3 | Mean (range) |
PM10 | |||||
In stable | na | 53 (34–88) | 65 (26–159) | μg/m3 | Median (10th–90th percentile) |
Outdoors | na | 47 (34–54) | na | μg/m3 | Median (10th–90th percentile) |
Ultrafine particles | |||||
In stable | 8000 (5100–13,000) | 1500 (900–1900) | 5400 (3000–9000) | Pt/cm3 | Median (10th–90th percentile) |
Outdoors | 10500 (5500–17,500) | 2000 (1600–2600) | 4600 (1800–6300) | Pt/cm3 | Median (10th–90th percentile) |
Horse allergen | 5170 | 750 | 790 | U/m3 | Median |
Microorganisms surface | |||||
Bacteria (total) | 110 (20–140) | 1.6 (0.4–2.2) | 1.4 (1.0–27) | 105/cm2 | Median (range) |
Fungi (total) | 6.6 (6.0–8.4) | 0.06 (0.04–0.1) | 0.15 (0.06–0.15) | 105/cm2 | Median (range) |
Microorganisms air | |||||
Bacteria (total) | 19 (0.9–22) | 3.2 (0.7–4.7) | 21 (21–77) | 105/m3 | Median (range) |
Bacteria (CFU) | 0.7 (0.2–3.6) | 0.03 (0.03–0.25) | 1.6 (1.6–70) | 105/m3 | Median (range) |
Fungi (total) | 3.5 (0.1–13) | 1.5 (1.2–2.7) | 6.6 (6.6–22) | 105/m3 | Median (range) |
Fungi (CFU) | 0.2 (0.002–0.96) | 0.04 (0.03–0.05) | 0.05 (0.05–3.8) | 105/m3 | Median (range) |
Endotoxin air | 96 | 85 | 275 | EU/m3 | Median (range) |