Section Env-Sw 805.04 - Liner Material and Construction Requirements(a) Soil liners shall meet or exceed the following specifications: (1) The liner shall be constructed of no less than 3 feet of a recompacted natural soil with uniform and consistent characteristics, or a uniform and consistent natural soil blended with an admixture, such as bentonite;(2) Recompaction shall occur in lifts not to exceed the depth demonstrated in a test pad necessary to achieve a saturated hydraulic conductivity no greater than 1 x 10-7 cm/sec;(3) The recompacted lifts shall be constructed in a step-wise manner to limit the potential for vertical channeling;(4) Recompacted saturated hydraulic conductivity shall equal 1 x 10-7 cm/sec or less; and(5) The liner shall be protected from damage due to frost, desiccation and differential movement.(b) Geomembrane liners shall meet or exceed the following specifications: (1) The liner material shall have a minimum thickness of 60 mils;(2) The liner material shall be chemically compatible with anticipated waste and leachate characteristics; and(3) Seaming methods which involve the use of solvents shall incorporate quality assurance/quality control procedures pursuant to Env-Sw 805.16 to assure protection of groundwater and surface water resources.(c) Composite liners shall consist of: (1) A geomembrane liner, as specified by (b) above; and(2) A soil component as specified by (a) above or a manufactured geosynthetic clay liner.(d) All liners shall be constructed in accordance with a quality assurance/quality control plan established pursuant to Env-Sw 805.16.N.H. Admin. Code § Env-Sw 805.04
#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 2505.04 )
Amended byVolume XXXIV Number 24, Filed June 12, 2014, Proposed by #10597, Effective 7/1/2014, Expires7/1/2024.