Aquifer recharge areas are classified as high, moderate, or low significance aquifer recharge areas according to the following criteria:
A. High Significance Aquifer Recharge Areas: High significance aquifer recharge areas are areas with slopes of less than fifteen percent (15%) that are underlain by coarse alluvium or sand and gravel.
B. Moderate Significance Aquifer Recharge Areas: Moderate significance aquifer recharge areas are:
1. Areas with slopes of less than fifteen percent (15%) that are underlain by fine alluvium, silt, clay, glacial till, or deposits from the electron mudflow; and
2. Areas with slopes of fifteen percent (15%) to thirty percent (30%) that are underlain by sand and gravel. (1973 Code § 15.20.050)
C. Low Significance Aquifer Recharge Areas: Low significance aquifer recharge areas are:
1. Areas with slopes of fifteen percent (15%) to thirty percent (30%) that are underlain by silt, clay, or glacial till; and
2. Areas with slopes greater than thirty percent (30%). Low significance aquifer recharge areas are not designated critical areas and are exempt from critical areas review requirements. (Ord. 806, 6-30-2005)