1. (a) The sequencing of facility development shall be planned based on subdividing the footprint into areas separated by berms.
2. (b) The subdivisions of a footprint shall be referred to as “phases,” “stages,” and “cells,” each term being used as defined in Env-Sw 104.09, Env-Sw 104.51, and Env-Sw 102.32, respectively.
3. (c) A facility shall be comprised of one or more phases, within which may exist one or more stages, within which may exist one or more cells, depending on the size of the facility and the design of the leachate management system.

4. (d) The layout and the configuration of, and the sequence for developing the phases, stages, and cells shall, by design:

   1. (1) Limit leachate generation by controlling the amount of area open to active operation and otherwise placing waste in a controlled manner consistent with the requirements in Env-Sw 806.02;
   2. (2) Limit the length of time unused cells remain inactive; and
   3. (3) Avoid the need to decommission groundwater monitoring wells as facility development proceeds and new stages or phases are constructed.
5. (e) Fill sequencing plans shall be prepared as part of the facility operating plan to show clearly the sequencing of facility development.

6. (f) Fill sequencing plans shall:

   1. (1) Show elevations and placements of lifts, as well as general access points;
   2. (2) Be compatible with the facility’s leachate management system design capabilities and limitations;
   3. (3) Be compatible with the facility’s stormwater management system design capabilities and limitations;
   4. (4) Be compatible with the facility closure design; and
   5. (5) Provide information and detail sufficient to allow a certified operator to operate the landfill in accordance with the approved design.
7. (g) Main access roads within the property boundary of a landfill leading to and from the working face of the landfill shall be designed and maintained to support the required loading, as well as limit to the extent practicable traffic congestion, road safety hazards, and dust production.
8. (h) Main access roads onto or into the property shall be fenced if necessary to catch blowing litter.
9. (i) Landscaping features shall be incorporated in conformance with Env-Sw 1103.04.
10. (j) Final grades at the facility shall be designed to blend with surrounding features to the greatest extent practicable.
11. (k) Perimeter and interior berms shall be analyzed for stability.

12. (l) Vegetated buffer zones shall be designed, established, and maintained to minimize impacts to abutting properties, including by shielding waste storage, handling, and disposal areas, and controlling the off-site transport of dust and windblown litter, as follows:

    1. (1) In the setback required by Env-Sw 804.04(a), the 50 feet nearest the property line;
    2. (2) In the setback required by Env-Sw 804.04(c), the 400 feet nearest the property line; and
    3. (3) In the setback required by Env-Sw 804.04(d), the 500 feet nearest the property line.
13. (m) A vegetated buffer zone shall be designed, established, and maintained to minimize the impact of ingress and egress access roads on abutting properties.
14. (n) An odor control plan shall be prepared and implemented as part of the technical specifications when excavation of putrescible waste is required during landfill construction.
15. (o) A landfill shall be designed such that all waste containment and structural components, including but not limited to, liner and leachate collection systems and cap systems, are constructed to resist the maximum horizontal acceleration in lithified earth materials within a seismic impact zone as defined in 40 CFR 258.14.

16. (p) A stability assessment of the landfill leachate management systems, and other structures such as mechanically stabilized earth berms, shall be performed and:

    1. (1) Include an analysis of potential failure planes for both static and seismic conditions; and
    2. (2) Be supported by corroborative field and laboratory data that defines the site geology and hydrogeology, geotechnical characteristics, waste mass characteristics, and geosynthetic characteristics.

17. (q) All walls, berms, or other structures used to retain waste shall be:

    1. (1) Located on a stable foundation as demonstrated by geotechnical investigation and calculations;
    2. (2) Designed with a static factor of safety of at least 1.5 against overturning and sliding; and
    3. (3) Designed to prevent the lateral movement of the waste mass.

18. (r) A settlement assessment to predict total and differential settlement of landfill systems shall be performed, and include:

    1. (1) A demonstration that systems will maintain their integrity and performance at maximum predicted settlements; and
    2. (2) A plan view showing settlement contours when predicted landfill settlements exceed 2 feet.
19. (s) Design features shall include the means to control and extinguish fires which might occur within the landfill and to otherwise limit the potential for liner damage due to fire.
20. (t) No permit or permit modification shall be granted for a landfill or landfill expansion unless groundwater monitoring can be accomplished, when required, in accordance with this chapter and pursuant to RSA 485-C.

Source. #5172, eff 7-1-91; ss by #6535, INTERIM, eff 7-1-97, EXPIRES: 10-29-97; ss by #6619-B, eff 10-29-97; (See Revision Note at chapter heading for Env-Sw 800); ss by #8459, eff 10-28-05 (formerly Env-Wm 2505.11); ss by #10597, eff 7-1-14; ss by #14156, eff 12-21-24