Vacation shall be earned as follows:

• 1 through the end of the 5th year of service (60 months):

           3.08 hours biweekly (80 hrs/yr)

• 5 through the end of the 10th year of service (120 months):

           4.61 hours biweekly (120 hrs/yr)

• 10 through the end of the 15th year of service (180 months):

           6.15 hours biweekly (160 hrs/yr)

• 15 years or more (180 months plus one day):

           7.69 hours biweekly (200 hrs/yr)