The performance guarantee must run in favor of the Township, and be in an amount not to exceed 120%, rounded to the nearest dollar, of the cost of installation of improvements to be dedicated to the Township, and have not yet been installed, that the Township or reviewing board may deem necessary or appropriate, including, but not limited to, streets, pavement, gutters, curbs, sidewalks, streetlighting, street trees, surveyor's monuments (as shown on the final map and required by the Map Filing Law (N.J.S.A. 46:23-9.9), water mains, sanitary sewers, community septic systems, drainage structures, public improvements of open space, any grading necessitated by the preceding improvements, and within an approved phase or section of a development, privately owned perimeter buffer landscaping. At the developer's option, a separate performance guarantee may be posted for the privately owned perimeter buffer landscaping.