WAC 173-183-850. Calculation of damages for spills in freshwater streams, rivers, and lakes

(1) The formula provided in subsection (2) of this section shall be used to determine damages liability for spills into freshwater streams, rivers, and lakes. The value of the variables used in the formula shall be determined by: (a) The OSC as enumerated in WAC 173-183-810 (1); (b) The mutually agreed upon independent expert, if applicable, as described in WAC 173-183-810 (2); and (c) The RDA committee chair as enumerated in WAC 173-183-820 (1)(c). (2) Damages liability shall be calculated using the following formula: Damages ($) = x * [(OIL AT *SVS *total gallons spilled) + (OIL MI *SVS *total gallons spilled) + (OIL PER *SVS *total gallons spilled)] where: total gallons spilled = the number of gallons of oil spilled as determined by the procedures outlined in WAC 173-183-810 ; SVS = Spill vulnerability score (from WAC 173-183-600 (3)); OIL AT = Acute Toxicity Score for Oil (from WAC 173-183-340 ); OIL MI = Mechanical Injury Score for Oil (from WAC 173-183-340 ); and OIL PER = Persistence Score for Oil (from WAC 173-183-340 ). x = multiplier of 0.162 for spills less than 1000 gallons in volume to adjust the damages calculated to the $1-100 per gallon range. x = multiplier of 0.486 for spills of 1000 gallons or more in volume to adjust the damages calculated to the $3-300 per gallon range. Damages ($) = x * [(OIL AT *SVS *total gallons spilled) + (OIL MI *SVS *total gallons spilled) + (OIL PER *SVS *total gallons spilled)] where: total gallons spilled = the number of gallons of oil spilled as determined by the procedures outlined in WAC 173-183-810 ; SVS = Spill vulnerability score (from WAC 173-183-600 (3)); OIL AT = Acute Toxicity Score for Oil (from WAC 173-183-340 ); OIL MI = Mechanical Injury Score for Oil (from WAC 173-183-340 ); and OIL PER = Persistence Score for Oil (from WAC 173-183-340 ). x = multiplier of 0.162 for spills less than 1000 gallons in volume to adjust the damages calculated to the $1-100 per gallon range. x = multiplier of 0.486 for spills of 1000 gallons or more in volume to adjust the damages calculated to the $3-300 per gallon range. Formula results shall be rounded to the nearest 0.01 to determine damages liability as follows: Decimals less than 0.005 shall be rounded down, and decimals equal to or greater than 0.005 shall be rounded up. For spills less than one thousand gallons, when the formula results in damages less than one dollar per gallon, the damages shall be adjusted to the minimum of one dollar per gallon spilled. For spills of one thousand gallons or more in volume, when the formula results in damages less than three dollars per gallon, the damages shall be adjusted to the minimum of three dollars per gallon spilled.