Page 51621 of the HRS Rule
184.108.40.206.2.3 Potential human food chain contamination.
Determine those fisheries (or portions of fisheries) within the watershed that are subject to potential human food chain contamination. Do not include those fisheries (or poritons of fisheries) already counted under the Level I or Level II concentrations factors.
Pi = Human food chain population value for fishery i.
Di = Dilution weight from Table 4-13 for fishery i.
n = Number of fisheries subject to potential human food chain contamination.
In Caluclating PF:
- Estimate the human food chain population value (Pi) for a fishery (or portion of a fishery) as specified in section 220.127.116.11.2.1.
- Assign the fishery (or portion of a fishery) a dilution weight as indicated in Table 4-13 (section 18.104.22.168.1), except: do not assign a dilution weight of 0.5 for a "3-mile mixing zone in quiet flowing river": instead assign a dilution weight based on the average annual flow.
If PF is less than 1, do not round it to the nearest integer: if PF is 1 or more, round to the nearest integer. Enter the value assigned in Table 4-1.