Authority: IC 13-14-8; IC 13-14-9; IC 13-18-3
Affected: IC 13-18-4
Sec. 15.
Where: WV = Wildlife value in milligrams of substance per liter (mg/L).
TD = Test dose (TD) in milligrams of substance per kilograms per day (mg/kg/d) for the test species. This must be either a NOAEL or a LOAEL.
UFA = Uncertainty factor (UF) for extrapolating toxicity data across species (unitless). A species-specific UF must be selected and applied to each representative species, consistent with the equation.
UFS = UF for extrapolating from subchronic to chronic exposures (unitless).
UFL = UF for LOAEL to NOAEL extrapolations (unitless).
Wt = Average weight in kilograms (kg) for the representative species.
W = Average daily volume of water consumed in liters per day (l/d) by the representative species.
FTLi = Average daily amount of food consumed from trophic level i in kilograms per day (kg/d) by the representative species.
BAFTLiWL=Bioaccumulation factor (BAF) for wildlife food in trophic level i in liters per kilogram (l/kg), developed using the BAF methodology in section 13 of this rule. For consumption of piscivorous birds by other birds, for example, herring gull by eagles, the BAF is derived by multiplying the trophic level three (3) BAF for fish by a biomagnification factor to account for the biomagnification from fish to the consumed birds.
Where: F = Feeding rate of mammalian species in kilograms per day (kg/d) dry weight.
Wt = Average weight in kilograms (kg) of the test animals.
Where: W = Drinking rate of mammalian species in liters per day (L/d).
Wt = Average weight in kilograms (kg) of the test animals.
Where: F = Feeding rate of avian species in kilograms per day (kg/d) dry weight.
Wt = Average weight in kilograms (kg) of the test animals.
Where: W = Drinking rate of avian species in liters per day (L/d).
Wt = Average weight in kilograms (kg) of the test animals.
Table 15-1
Exposure Parameters for the Five Representative Species Identified for Protection
Species | Adult Body Weight (kg) | Water Ingestion Rate (L/day) | Food Ingestion Rate of Prey in Each Trophic Level (kg/day) | Trophic Level of Prey (Percent of Diet) |
Mink | 0.80 | 0.081 | TL3: 0.159 | TL3: 90% |
Other: 0.0177 | Other: 10% | |||
Otter | 7.4 | 0.600 | TL3: 0.977 | TL3: 80% |
TL4: 0.244 | TL4: 20% | |||
Kingfisher | 0.15 | 0.017 | TL3: 0.0672 | TL3: 100% |
Herring gull | 1.1 | 0.063 | TL3: 0.192 | Fish: 90% |
TL4: 0.0480 | TL3: 80% | |||
Other: 0.0267 | TL4: 20% | |||
Other: 10% | ||||
Bald eagle | 4.6 | 0.160 | TL3: 0.371 | Fish: 92% |
TL4: 0.0929 | TL3: 80% | |||
PB: 0.0283 | TL4: 20% | |||
Other: 0.0121 | Birds: 8% PB: 70% nonaquatic: 30% |
TL3 = trophic level three fish
TL4 = trophic level four fish
PB = piscivorous birds
Other = nonaquatic birds and mammals
*This document is incorporated by reference. Copies are available from the U.S. Environmental Protection Agency, Office of Water Resource Center, 1200 Pennsylvania Avenue, N.W., Washington, D.C. 20460, or are available for review at the Indiana Department of Environmental Management, Office of Legal Counsel, Indiana Government Center North, 100 North Senate Avenue, Thirteenth Floor, Indianapolis, Indiana 46204.
327 IAC 2-1.5-15