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(C) mechanical compatibility with stresses caused by equipment traffic, and the result of differential settlement of the waste over time; and (D) durability throughout the postclosure maintenance period. (2) The minimum construction quality assurance criteria to ensure that geosynthetic membranes will meet or exceed all design specifications shall include, but not be limited to: (A) Preconstruction quality control program 1. inspection of the raw materials (e.g. , density, melt flow index, percent carbon black) ; 2 . manufacturing operations and finished product specifications (e.g. , thickness, puncture resistance, multi-axial stress/strain tests) , 3 . fabrication operations (e.g. , factory seaming) ; 4 . observations related to transportation, handling, and storage of the geosynthetic membrane; and 5. inspection of foundation preparation. (B) Construction activities 1. the geosynthetic membrane shall have thickness strength sufficient to withstand the stresses to which it shall be subjected, including shear forces, puncture from rocks or penetration from roots. 2. inspection of geosynthetic membrane placement (e.g. , trench corners, monitoring systems) . 3 . seaming of the material; and 4 . installation of anchors and seals. (C) Postconstruction activity includes checking for material and placement imperfections in the installed geosynthetic membrane. 1. Imperfections that jeopardize the integrity of the membrane's function as an impermeable barrier (i.e. , pin holes, rips, creases created during placement) shall be repaired to the original}' manufacturer's specifications and re-inspected by the CQA officer.. ' (D) Evaluation of the personnel and equipment to be used to install and inspect the geosynthetic membrane, and pass/fail criteria and corrective procedures for material and installation procedures shall be specified as required in Subsection (c) . NOTE: Authority cited: Sections 40502 and 43020, Public Resources Code, and 66796.22 (d) , Government Code. Reference: Sections 43021, Public Resources Code, and 66796.22 (d) , Government Code. Section 17776. Final Grading (a) The site shall be designed with final grades 1) to accommodate anticipated future settlement, 2) in accordance with Title 23, CCR, Subchapter 15, Section 2581 (b) minimum grading standards, and 3) to reduce run-off velocities to protect the final cover from soil erosion. (b) The final grading design shall be developed through an analysis of each function by a registered civil engineer or certified engineering geologist. III 7 .8-18 (6/18/90)