Table 2.
Estimated HC5s and 95% CIs for TPH, PAH and parent naphthalene from several SSDs developed with data from water accommodated fractions (WAF, including MEWAF) and chemically enhanced WAF (CEWAF) with light (API gravity 31.3–44; 16 oils), medium (API gravity 24.8–30.6; 4 oils), Alaska North Slope (ANS), Prudhoe Bay (BP) and No. 2 fuel oil products.
| Exposure media1 | Analytes | HC5 (95%CI) µg/L |
Most sensitive Arctic species |
SSD Percentile |
|---|---|---|---|---|
| WAF+MEWAF light oils | TPH | 956 (590–1,472) | Salvelinus malma | 29th |
| PAH | 27.6 (20.1–37.7) | NA | NA | |
| Naphthalene | 8.13 (5.13–12.74) | S. malma | 58th | |
| WAF+MEWAF medium oils | TPH | 2,935 (2,115–3,993) | Boreogadus saida | 8th |
| PAH | 74.9 (58.4–95.4) | B. saida | 17th | |
| CEWAF medium oils | TPH | 3,907 (2,590–5,813) | Myoxocephalus sp. | 73th |
| PAH | 282 (225–350) | Calanus glacialis | 50th | |
| WAF+MEWAF No. 2 fuel oil | TPH | 488 (269–819) | Eualus suckleyi | 30th |
| WAF+MEWAF ANS oil | TPH | 2,501 (1,754–3,459) | B. saida | 13th |
| CEWAF ANS oil | TPH | 4,807 (3,270–6,958) | Myoxocephalus sp. | 75th |
| WAF+MEWAF +CEWAF ANS+PB oils | TPH | 5,600 (4,214–7,386) | B. saida | 25th |
| PAH | 170 (144–199) | Myoxocephalus sp. | 17th | |
| Naphthalene | 33.2 (26.8–40.7) | Myoxocephalus sp. | 17th |