(1) For the purposes of this section:

     (a) "Alcohol fuel" means any alcohol made from a product other than petroleum or natural gas, which is used alone or in combination with gasoline or other petroleum products for use as a fuel for motor vehicles, farm implements, and machines or implements of husbandry.

     (b) "Anaerobic digester" has the same meaning as provided in RCW 82.08.900.

     (c) "Biodiesel feedstock" means oil that is produced from an agricultural crop for the sole purpose of ultimately producing biodiesel fuel.

     (d) "Biodiesel fuel" means a mono alkyl ester of long chain fatty acids derived from vegetable oils or animal fats for use in compression-ignition engines and that meets the requirements of the American society of testing and materials specification D 6751 in effect as of January 1, 2003.

     (e) "Wood biomass fuel" means a pyrolytic liquid fuel or synthesis gas-derived liquid fuel, used in internal combustion engines, and produced from wood, forest, or field residue, or dedicated energy crops that do not include wood pieces that have been treated with chemical preservatives such as creosote, pentachlorophenol, or copper-chroma-arsenic.

     (2)(a) All leasehold interests in buildings, machinery, equipment, and other personal property which are used primarily for the manufacturing of alcohol fuel, wood biomass fuel, biodiesel fuel, biodiesel feedstock, or the operation of an anaerobic digester, the land upon which this property is located, and land that is reasonably necessary in the manufacturing of alcohol fuel, wood biomass fuel, biodiesel fuel, biodiesel feedstock, or the operation of an anaerobic digester, but not land necessary for growing of crops, which together comprise a new manufacturing facility or an addition to an existing manufacturing facility, are exempt from leasehold taxes for a period of six years from the date on which the facility or the addition to the existing facility becomes operational.

     (b) For manufacturing facilities which produce products in addition to alcohol fuel, wood biomass fuel, biodiesel fuel, or biodiesel feedstock, the amount of the leasehold tax exemption shall be based upon the annual percentage of the total value of all products manufactured that is the value of the alcohol fuel, wood biomass fuel, biodiesel fuel, and biodiesel feedstock manufactured.

     (3) Claims for exemptions authorized by this section shall be filed with the department of revenue on forms prescribed by the department of revenue and furnished by the department of revenue. Once filed, the exemption is valid for six years and shall not be renewed. The department of revenue shall verify and approve claims as the department of revenue determines to be justified and in accordance with this section. No claims may be filed after December 31, 2009, except for claims for anaerobic digesters, which may be filed no later than December 31, 2012.

     The department of revenue may promulgate such rules, pursuant to chapter 34.05 RCW, as are necessary to properly administer this section.

[2008 c 268 § 2. Prior: 2003 c 339 § 10; 2003 c 261 § 10; 1985 c 371 § 3; 1980 c 157 § 2.]

NOTES:

     Effective date -- 2008 c 268: See note following RCW 84.36.635.

     Effective dates -- 2003 c 339: See note following RCW 84.36.640.

     Effective dates -- 2003 c 261: See note following RCW 84.36.635.