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RFP: Spring Creek Planting non -compacted depth of 3 inches to a radius of 3 feet around all plants within interplanted plant locations. Areas that are not mulched will be seeded. Bark or wood chip mulch shall be derived from fir, pine, or hemlock species. It shall not contain resin, tannin, or other compounds in quantities that would be detrimental to plant life. Sawdust shall not be used as mulch. Mulch produced from finished wood products or construction debris will not be allowed. Mulch shall be feathered to the base of the plant. Any contamination of the mulch due to the Contractor's operations shall be corrected to its former condition at no additional cost to the County. Mulch placed to a thickness greater than specified shall be at no additional cost to the County. The Contractor shall keep plant material crowns, runners, and branches free of mulch at all times. 4) Final Cleanup All pots, containers, bags, and ties from the planting materials shall be removed from the site and properly recycled or disposed of. 5) Optional bid items It is the County's desire to amend soil, provide wildlife exclusionary fencing, and temporary irrigation for the planted areas. Pricing of these three bid items is requested for potential optional award at the discretion of the County. The County may elect to optionally expand the baseline award based on project funding availability. Contractors are encouraged to bid all three options, though it is uncertain if they will be included in the contract. If contractors wish to suggest an alternative for these options, they may propose an alternative approach with an associated cost in their proposal. This optional pricing will not be factored into the evaluation of the apparent low bidder. a) Soil Amendment Compost used for soil amendments shall be the result of the biological degradation and transformation of organic materials under controlled conditions designed to promote aerobic decomposition. Compost shall be stable with regard to oxygen consumption and carbon dioxide generation. Compost shall be mature with regard to its suitability for serving as a soil amendment. The compost shall have a moisture content that has no visible free water or dust produced when handling the material. Compost shall be fine compost, meeting the following gradation: Sieve Size Percent Passing Minimum Maximum V. 100 5/8'. 90 100 1/4" 75 100 Compost shall be included in site preparation for holes dug for potted shrubs and trees. Incorporate approximately 2 inches of compost into existing topsoil to a depth of 8 inches within each hole. Compost shall not be worked or placed when the ground or compost is frozen, or