2918 25 STORMWATER 4825 Revised Final

22 iii. If the runoff from a project site will drain directly or in indirectly, into a water with a Total Maximum Daily Load (TMDL) for TSS, then the required TSS reduction from the site shall be increased to be consistent with the reductions set forth in the TMDL. iv. If the runoff from a project site will drain, directly or indirectly, into an impaired water that is listed under New Jersey’s Integrated Water Quality Assessment Report as impaired for TSS, then TSS shall be removed to the maximum extent practicable. 3. The requirement to reduce TSS does not apply to any stormwater runoff in a discharge regulated under a numeric effluent limitation for TSS imposed under the New Jersey Pollutant Discharge Elimination System (NJPDES) rules, N.J.A.C. 7:14A, or in a discharge specifically exempt under a NJPDES permit from this requirement. Every major development, including any that discharge into a combined sewer system, shall comply with 2 above, unless the major development is itself subject to a NJPDES permit with a numeric effluent limitation for TSS or the NJPDES permit to which the major development is subject exempts the development from a numeric effluent limitation for TSS. 4. The water quality design storm is 1.25 inches of rainfall in two hours. Water quality calculations shall consider the distribution of rain from the water quality design storm, as reflected in Table 4, below. The calculation of the volume of runoff may consider the implementation of stormwater management measures.