Concentration of aldehydes and VOCs in the air at the two incinerators and the control site
| Substances (μg/m3) | French TLV-TWA | Incinerators | Plant 1 | Plant 2 | Control site | Plant 1 v control | Plant 2 v control | Plant 1 v plant 2 | |
|---|---|---|---|---|---|---|---|---|---|
| Formaldehyde | 600 | M ± SD (n) | 11 ± 9.6 (33) | 3.4 ± 1.1 (16) | 16.9 ± 9 (17) | 29.1 ± 13.7 (6) | |||
| m; range | 8.5; 2–42 | 4; 2–5 | 15; 7–42 | 33.4; 10–45 | p<0.001 | NS | p<0.001 | ||
| Acetaldehyde | 180000 | M ± SD (n) | 39.3 ± 31.3 (33) | 31.8 ± 21.9 (16) | 45.1 ± 36.6 (17) | 78 ± 98.1 (6) | |||
| m; range | 29; 4–140 | 21; 11–78 | 34; 4–140 | 33.7; 7–260 | NS | NS | NS | ||
| Aldehydes | M ± SD (n) | 54 ± 36.3 (33) | 37.2 ± 23.5 (16) | 66.8 ± 39.6 (17) | 109.6 ± 92.1 (6) | ||||
| m; range | 42; 15–166 | 27; 16–86 | 57; 15–166 | 62; 40–277 | p<0.05 | NS | p<0.05 | ||
| Alkanes | M ± SD (n) | 453 ± 601 (33) | 590 ± 760 (16) | 324 ± 383 (17) | |||||
| m; range | 124; 20–2347 | 308; 30–2347 | 119; 20–1244 | ND (6) | p<0.001 | p<0.001 | NS | ||
| Benzene | 16000 | M ± SD (n) | 20 ± 34 (33) | 34 ± 46 (16) | 7 ± 4 (17) | ||||
| m; range | 8; 2–147 | 11; 2–147 | 7; 2–17 | ND (6) | p<0.001 | p<0.001 | NS | ||
| Toluene | 375000 | M ± SD (n) | 430 ± 636 (33) | 614 ± 843 (16) | 257 ± 280 (17) | 81 ± 79 (6) | |||
| m; range | 140; 35–2677 | 206; 35–2677 | 107; 41–899 | 42; 9–184 | NS | NS | NS | ||
| Xylenes | 435000 | M ± SD (n) | 223 ± 388 (33) | 364 ± 519 (16) | 91 ± 101 (17) | 21 ± 38 (6) | |||
| m; range | 57; 9–1948 | 97; 32–1948 | 35; 9–265 | ND; ND–88 | p<0.005 | p<0.05 | p<0.01 | ||
| Aromatic hydrocarbons | M ± SD (n) | 774 ± 1212 (33) | 1160 ± 1616 (16) | 410 ± 448 (17) | 169 ± 135 (6) | ||||
| m; range | 244; 60–5506 | 354; 76–5506 | 154; 60–1226 | 151; 9–332 | NS | NS | NS | ||
| Dichloromethane | 360000 | M ± SD (n) | 283 ± 680 (33) | 51 ± 54 (16) | 501 ± 905 (17) | ||||
| m; range | 73; ND–3775 | 35; ND–162 | 121; 9–3775 | ND | p<0.005 | p<0.001 | p<0.005 | ||
| Chlorinated hydrocarbons | M ± SD (n) | 754 ± 1237 (33) | 715 ± 1197 (16) | 791 ± 1309 (17) | |||||
| m; range | 231; 9–5359 | 229; 9–4226 | 231; 23–5359 | ND | p<0.001 | p<0.001 | NS | ||
| Oxygenated hydrocarbons | M ± SD (n) | 883 ± 1063 (33) | 1226 ± 1189 (16) | 561 ± 842 (17) | 710 ± 770 (6) | ||||
| m; range | 476; 5–4253 | 989; 5–4253 | 364; 11–3580 | 380; 244–2068 | NS | NS | NS | ||
| VOCs | M ± SD (n) | 2917 ± 3499 (33) | 3826 ± 4350 (16) | 2061 ± 2267 (17) | 881 ± 880 (6) | ||||
| m; range | 1202; 182–13396 | 1461; 182–13396 | 937; 220–8421 | 457; 252–2400 | NS | NS | NS |