Specifications include, but are not limited to: 4.2.1 Contractor shall provide semi-annual maintenance of the permeable pavers at both locations, once in the spring and once in the fall. 4.2.2 Contractor shall coordinate all work with Project Manager, Mikayla Goemaat. Date and time shall be approved by the Project Manager at least 2 weeks in advance. 4.2.3 Contractor shall reference Attachment D for map of the locations. 4.2.4 Coe College Alley located between D Ave and E Ave NE and 14th St and College Dr NE a) Alley is constructed of a Pave-Drain system and must be vacuumed out with a Pave Drain vacuum head or Elgin Whirlwind. b) Contractor shall remove and dispose of sediment including sand, silt, and debris from between pavers.