A. 
The Planning Board shall require from the developer/applicant/owner a financial guarantee in a form acceptable to the Planning Board prior to any site work for the construction of a development requiring a stormwater management facility. The amount of the financial guarantee shall be in the amount set by the Planning Board, but shall not be less than the total estimated construction cost of the stormwater management facility. The financial guarantee so required in this article shall include provisions relative to forfeiture for failure to complete work specified in the approved stormwater management and erosion and sediment control plan, compliance with all of the provisions of this bylaw and other applicable laws and regulations, and any time limitations. The financial guarantee shall not be fully released without a final inspection of the completed work by the Director of Planning and Conservation or their designee, submission of as-built plans, and certification of completion by the Planning Board of the stormwater management facilities being in compliance with the approved plan and the provisions of this bylaw.
B. 
The performance guarantee required under this bylaw may be in addition to the performance guarantee required for the development under any other Town bylaw or regulation. The Planning Board may, at its sole discretion, allow the performance guarantee required under another South Hadley bylaw or regulation to substitute for the performance guarantee required under this bylaw if the Board determines the two guarantees serve the same function, the purposes of this bylaw are adequately furthered, and the Director of Planning and Conservation, or their designee, does not object to the substitution.
C. 
The performance guarantee is intended to be used for ensuring that the stormwater management system functions as designed. In the event the Planning Board determines (based on input from the Director of Planning and Conservation or their designee and/or a consultant engineer retained by the Planning Board) that the system is not functioning as designed (such as, retaining water in the detention basins for a period of time longer than anticipated or at levels higher than anticipated), the Board may utilize proceeds of the performance guarantee to have work undertaken to remedy the deficiencies. Terms of the performance guarantee shall be spelled out in a performance guarantee agreement. If the Planning Board determines that a third-party engineer should review the site and make recommendations as to whether the system needs to be modified and/or identify modifications needed to achieve the stormwater management system's goals, the Board may utilize portions of the performance guarantee for employment of such an engineer. If this review determines that the system needs to be modified to achieve the stormwater management system's goals, the developer is required to make such modifications as so directed.