1. (a) The plans shall include the following erosion and sediment control notes:

   1. (1) “Perimeter controls must be installed prior to earth moving operations.”
   2. (2) “Stormwater treatment ponds and drainage swales must be installed before rough grading the site.”
   3. (3) “Runoff must be directed to temporary practices until stormwater BMPs are stabilized.”
   4. (4) “Basins, ditches and swales must be stabilized prior to directing runoff to them.”
   5. (5) “Roadways and parking areas must be stabilized within 72 hours of achieving finished grade.”
   6. (6) “Cut and fill slopes must be stabilized within 72 hours of achieving finished grade.”
   7. (7) “All areas of unstabilized soil must be stabilized as soon as practicable but no later than 45 days after initial disturbance.”
   8. (8) “Erosion control practices must be inspected at least weekly and after every rain event of 0.5 inch or more.”

   9. (9) “In areas that will not be paved, “stable” means that:

      1. a. A minimum of 85% vegetative cover has been established in a manner that is evenly distributed over the site, with no large areas of bare soil;
      2. b. A minimum of 3 inches of non-erosive material such as stone or riprap has been installed; or
      3. c. Erosion control blankets have been installed in accordance with Env-Wq 1506.03.”
   10. (10) “In areas to be paved, “stable” means that base course gravels meeting the requirements of NHDOT Standard for Road and Bridge Construction, 2016, Item 304.2, available as noted in Appendix B, have been installed.”
2. (b) Unless a smaller project area of disturbance is proposed or a larger area is allowed under Env-Wq 1505.03(b)(1), the plan shall include the following note: “No more than 5 acres shall be disturbed (not stabilized) at any time.”

3. (c) The plans also shall include:

   1. (1) Specifications for temporary and permanent seeding; and
   2. (2) If applicable, winter construction notes that reflect the requirements of Env-Wq 1505.06.

4. (d) If the project includes disturbed land with slopes greater than 5% and the flow path over the sloped area is greater than 300 feet, the following note shall also be included on the plans:

   1. (1) “All areas of unstabilized soil shall be temporarily stabilized in accordance with Env-Wq 1506.01, Env-Wq 1506.02, or Env-Wq 1506.03, whichever applies, as soon as practicable, but no later than 7 days after initial disturbance or prior to any rainfall event that produces 0.5 inch or more of precipitation within a 24-hour period, whichever occurs first.”

5. (e) For any project with an infiltration basin proposed, the following notes shall be included on the plans:

   1. (1) “Do not traffic exposed soil surface with construction equipment. If feasible, perform excavations with equipment positioned outside the limits of the infiltration system.”
   2. (2) “After the infiltration system area is excavated to the final design elevation, the floor should be deeply tilled with a rotary tiller or disc harrow to restore infiltration rates, followed by a pass with a leveling drag.”
   3. (3) “Do not place infiltration systems into service until the contributing areas have been fully stabilized.”

6. (f) For any project with a manufactured sediment and erosion control product, the following notes shall be included on the plans, if applicable:

   1. (1) “All manufactured erosion and sediment control products, with the exception of turf reinforcement mats, utilized for, but not limited to, slope protection, runoff diversion, slope interruption, perimeter control, inlet protection, check dams, and sediment traps shall not contain plastic, or multi-filament or monofilament polypropylene netting or mesh with an opening size of greater than 1/8 inches.”
   2. (2) “Turf reinforcement mats shall be covered with soil to prevent exposure of the mats to the surface.”
7. (g) A note containing more stringent requirements shall be allowed to replace any note specified above.

Source. #12342, eff 8-15-17; ss by #13758, eff 9-28-23 (formerly Env-Wq 1504.16); ss by #14472, eff 1-19-26, EXPIRES: 1-19-36