Specifications include, but are not limited to: Site Preparation: Preliminary Site Walk: Contractor will meet with the City of Mesa Representative at each site prior to any start of work at each location to discuss all work to be performed including site layout, grading needs, site work schedule, blue-staking, sprinkler marking, irrigation material needs, granite color, inspection schedule. Contractor will give City of Mesa Representative a minimum of three (3) working days’ notice for this meeting. Clearing and Grubbing: Areas indicated on the project map shall be grubbed and cleared of any unwanted grass, shrubs, stumps, groundcover, brush, weeds, roots, and all other material as directed, and disposal of such items will be at the Contractor’s expense. All vegetation noted to be left in place must be protected by the Contractor or will be replaced at Contractor’s expense. Cavities resulting from the removal of vegetation or other materials shall be backfilled with material approved by the City Representative. Contractor will provide all labor, equipment, and material required for clearing and grubbing and shall be reflected in the square foot unit price quoted in this contract. Clearing and Grubbing activities within two (2) feet of block walls shall be limited so as not to disturb or negatively affect the structural integrity of the walls. Digging in these areas shall not undermine, or further expose the footer of any walls and shall not extend below the base of the first course of blocks. Clear and Grubbing performed within Critical root zones of live trees shall take care not to remove the roots of living trees whenever possible. Critical root zones shall be considered any ground underneath a tree’s canopy as well as a radius from the trunk of the tree equaling one (1) foot for each inch of trunk diameter. Grading: After clearing and grubbing the project area, the Contractor shall perform rough grading followed by fine grading in preparation for new materials such as decorative rock, turf sod, or topsoil. The Contractor will provide all labor and equipment and will be responsible for the disposal costs of unwanted materials resulting from grading practices. The unit price for grading shall be paid according to the square foot of the landscape area being graded. Rough Grade. The Contractor shall set the grade for landscape projects to ensure that all areas will have proper drainage while providing an even base for curb and granite installation. Grading may include adding, removing, or relocating soil. Soil shall not be removed adjacent to block walls, fences, or other infrastructure. Final Grade. The Contractor shall create a smooth surface with the removal of rubble, rock clods, rocks greater than one (1) inch, or other undesirable debris in the landscape. The Contractor shall prepare the finished grade for granite installation. Grading activities within two (2) feet of block walls shall be limited so as not to disturb or negatively affect the structural integrity of the walls. Digging in these areas shall not undermine, or further expose the footer of any walls and shall not extend below the base of the first course of blocks. Curb Installation: Contractor shall install a concrete curb per provided specifications (see attachment section below) to create a border between the designated non-functional turf areas and the remaining grass. Non-Functional Turf areas will typically be found around the perimeter of the property within six (6) feet of any block wall, gate, or fence. There may be situations where the six (6) foot barrier will be modified to accommodate existing trees or infrastructure. Each site will have a layout diagram for reference. Pricing for curbing installation will be by the linear foot. A site layout diagram including curbing plan for each site will be provided and discussed during the preliminary site walk for each location. Curbing shall be six (6) inches wide, eight (8) inches deep, with control joints installed every six (6) feet. Curbing shall contain one (1) piece of #3 rebar. Rebar shall be centered within cross-section of curb and to end approximately three (3) inches from each termination of curb. See provided specifications (see attachment section below) for full details and requirements. Curbing shall be installed so the top of the curbing meets the height of the top of existing curbs and sidewalks where they come together so as not to create a toe catch or trip hazard. In cases where new curbing meets an existing curbed granite area, there may be a small amount of curbing that needs to be cut out and removed to allow for a seamless transition. Typically, five (5) to ten (10) feet of old curbing removal per occurrence. These will be requested in the preliminary site walk and noted on the site layout diagram. Payment for removal of old curbing shall be billed by the linear foot and shall include all labor, and disposal costs. Use native fill dirt or clean imported fill dirt for any grading or backfilling. Any rocks larger than one (1) inch to be removed from fill dirt. Any extra dirt left over is to be removed from the site. Pricing for import fill dirt will be by the cubic yard. Curbing shall be installed so that the top of the curb is three (3) inches higher than the existing grade in the designated non-functional turf areas and one (1) inch higher than the finish grade once two (2) inches of granite is installed. Finish grade on the outside of the non-functional turf area shall be two (2) inches below the top of the curb. See Detail 607-3-M for reference. All tools, materials, labor and any other associated costs for the curbing installation including water are to be provided by the Contractor. Concrete tools and implements shall not be cleaned directly into any Park or Retention Basin areas. Any tubs or basins used to clean concrete shall be removed promptly. Any spilled concrete materials shall be cleaned up immediately. Turf Removal: Kill and remove existing turfgrass in the non-functional areas. Use Glyphosate or other approved herbicide(s) to kill the grass in the designated Non-Functional Turf areas. Non-Functional Turf areas will typically be found around the perimeter of the property within six (6) feet of any block wall, gate, or fence. Each site will have a layout diagram for reference. Two herbicide applications will be required approximately fourteen (14) days apart from each other. Herbicides shall only be applied by a properly licensed applicator and shall adhere to label directions and all applicable laws and regulations. Herbicide treatments are to remain in the targeted areas. Contractor is to assure herbicides do not drift into non-target areas. Any damage occurring from drift including unintended turf/plant die-off will be the responsibility of the contractor to repair/replace. Herbicide applications will be performed only while target grass is actively growing and per label directions. Grass dormancy typically occurs from the months of October through March. Bid submittals shall include the specific herbicide that will be used for the grass kill-off. An herbicide spray log shall be submitted to the City after every application that details the herbicide(s) applied, their concentrations, the mixture contents and volume, date, time, and location of application, and the name and license number of the applicator. After the grass has been killed, it shall be mechanically removed to a minimum depth of two (2) inches. Grading and removal activities within two (2) feet of block walls shall be limited so as not to disturb or negatively affect the structural integrity of the walls. Digging in these areas shall not undermine, or further expose the footer of any walls and shall not extend below the base of the first course of blocks. Grading and removal activities performed within critical root zones of live trees shall take care not to remove the roots of living trees whenever possible. Critical root zones shall be considered any ground underneath a tree’s canopy as well as a radius from the trunk of the tree equaling one (1) foot for each inch of trunk diameter. Granite Installation: Provide and install a two (2) inch depth of quarter (¼) inch minus granite inside the designated non-functional turf areas. Granite installation shall be billed by the square foot. Granite color shall be “Pink Coral” or other approved equal. Alternate color options should be submitted during the bid process. Other granite size options may be specified up to one (1) inch screened depending on the slope conditions. This will be discussed during the preliminary site walk. Two (2) separate applications of a pre-emergent herbicide shall be made to the non-functional turf areas. One (1) application shall be made before the granite is placed, and one (1) application after the granite is placed. Bid submittals shall include the specific pre-emergent herbicide that will be used for this process. An herbicide spray log shall be submitted to the City after every application that details the herbicide(s) applied, their concentrations, the mixture contents and volume, date, time, and location of application, and the name and license number of the applicator. Sprinkler System Modifications: Remove indicated sprinkler heads, install additional lateral piping, and install new sprinkler heads (per provided specification – Mesa Standard Detail M-109.102) to correct the irrigation coverage areas for the new layout. The pricing for sprinkler head replacements will be per head. Pricing for Irrigation pipe installation will be by the linear foot. Remove any sprinkler heads found within the non-functional turf areas. Sprinkler heads that are removed shall be returned to the City of Mesa Project Representative. Existing sprinkler heads to be removed will be flagged by the City of Mesa. A request shall be sent to the Representative a minimum of three (3) working days before the sprinklers need to be marked. Extend existing lateral piping and install new sprinkler heads outside of the non-functional turf areas that will provide proper head-to-head coverage for the turf outside of the non-functional turf areas. These heads will need to be moved approximately six (6) feet to move them outside of the non-functional turf areas. New sprinkler head locations will be the responsibility of the Contractor and shall adhere to the Irrigation Association’s Standards and Best Practices. Lateral Pipes will typically be one (1) inch but could be between a half (½) inch to two (2) inch PVC. Extended lines should match the existing lateral sizes. Installation of new lateral piping will be priced by the linear foot. Remove any sprinkler heads in adjacent rows that provide overlapping coverage into the non-functional turf areas and re-install new ones in a similar fashion so that sprinkler coverage is maintained, but water does not land in the non-functional turf areas. These heads will need to be moved approximately three (3) feet to correct for uniform sprinkler coverage. New sprinkler head locations will be the responsibility of the Contractor and shall adhere to the Irrigation Association’s Standards and Best Practices. The Installation of irrigation lateral lines, PVC Schedule 40 - up to two (2) inches, shall include all labor, trenching, shading, and clean fill materials to ensure compaction of trench. Installed sprinkler heads shall adhere to the provided specifications (Mesa Standard Detail M-109.102) and shall be placed at least two (2) inches away from concrete curbing, sidewalks, valve, electrical boxes, or other perimeter structures. All PVC and fittings used must be Schedule 40. Solvent weld joints must be glued using Weld-On P70 Primer and Weld-On 711 PVC Pipe Cement (Or approved equal). All heads must have a swing joint installed (see spec for full details and requirements). Sprinkler heads shall be Hunter I-25-04-SS unless pressure or coverage limitations dictate the need for a different model.
