Table 3.
Illustration of Total Hydrocarbon (THC) Ordinal Exposure Categories of Selected Exposure Groups1
| Exposure Group | THC Ordinal Exposure Category2 | ||||||
|---|---|---|---|---|---|---|---|
| TP 1a (April 22-May 15, 2010) | TP 1b (May 16-July 15, 2010) | TP 2 (July 16-August 10, 2010 ) |
TP 3 (August 11-September 30, 2010 ) | TP 4 (October 1-December 31, 2010) | TP 5 (January 1-March 31, 2011 ) | TP 6 (April 1-June 30, 2011 ) | |
| IH-safety/Enterprise | 6 | 6 | 4 | 4 | NA | NA | NA |
| IH-safety/DD2 | 4 | 4 | 4 | 4 | NA | NA | NA |
| Technician/DD2 | 4 | 4 | 3 | 2 | NA | NA | NA |
| All jobs/All ROV vessels | 7 | 6 | 4 | 4 | NA | NA | NA |
| All Jobs/All research vessels | 4 | 4 | 3 | 3 | NA | NA | NA |
| Vessel patrolled beaches/Louisiana | 5 | 5 | 4 | 4 | 4 | 2 | 2 |
| Transport vessel/Louisiana | 4 | 4 | 4 | 4 | 4 | 2 | 2 |
| Vessel handled oily booms/Louisiana | 4 | 4 | 4 | 3 | 3 | 2 | 2 |
| Cleaned beaches/Florida | 1 | 4 | 3 | 3 | 3 | 2 | 2 |
| Cleaned beaches/Louisiana | 3 | 3 | 3 | 4 | 3 | 2 | 2 |
| Office work/All states | 2 | 2 | 2 | 2 | 2 | 1 | 1 |
| Deconned equipment on land | 4 | 4 | 4 | 4 | 4 | 2 | 2 |
1
See Tables S2–4 for more detail
2
1=<0.03, 2=0.03–0.09, 3=0.1–0.29, 4=0.3–0.99, 5=1.00–2.99, 6=3–9.99, 7>10 ppm THC