g. When DOB regulations require a perimeter barrier or "construction fence", and the site is within 200 feet of a receptor or a receiving property as defined in sec.28-109 of this chapter, perimeter noise barriers shall be fabricated in accordance with the standards set forth in subdivision e of sec.28-107 of this chapter and lined with material set forth in subdivisions c and e of sec.28-107 of this chapter. Further, the responsible party shall fill in any gaps and holes in adjacent panels of noise barriers with noise attenuation material, so as to maximize the effectiveness of such barriers. Such noise attenuation material shall include noise curtain material, additional plywood, or similar material. When viewing ports are required in the curtain material, they shall be filled in with clear plastic attached to the curtain.