ARCHIVED REPORTS_1996 - Laserfiche WebLink

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( i) Underdrains and temporary diversion ditches utilized during the operating phase of the site shall not be included in the final drainage design. (1) Surface diversion features shall be used in lieu of these structures for the closure and postclosure maintenance period. (2) Underdrains utilized to control surface water during the operating life of the site shall be permanently sealed during closure. (j ) Any drainage layer in the final cover shall be designed and constructed to intersect with the final drainage system. NOTE: Authority cited: Sections 40502 and 43020, Public Resources Code, and 66796.22 (4) , Government Code. Reference: Sections 43021, Public Resources Code, and 66796.22 (d) , Government Code. Section 17779. Slope Protection and Erosion Control (a) The operator shall develop and implement procedures to protect the integrity of the final cover and enhance its ability to prevent erosion and minimize soil erosion from disturbed areas on-site. (b) The procedures developed shall be designed by a registered civil engineer or certified engineering geologist. (c) To the extent feasible, based on site-specific factors, initial vegetation efforts shall be implemented in the beginning of the rainy season to aid in the germination of seed and ,_the establishment of plant growth. (d) To the extent feasible, based on site-specific factors, slope protection and erosion control methods _ shall be -. implemented pursuant to Section 17764 of this Article. , (e) Establishment and maintenance of a vegetative cover shall be developed according to the postclosure land use., The following . .plant species selection criteria shall be addressed: (1) Rooting depth of any vegetation growing on the cover shall not exceed the depth to the material which functions as a barrier layer pursuant to the final cover design in Section 17773 of this Article; (2) Tolerance of final cover vegetative layer soil conditions and the effects of landfill gas; j (3) Resistance to fire, diseases, and insects and other pests; (4) Adaptability to site climate (sunshine, exposure, temperature, rainfall, drought, , wind) ; , (5) Rapidity of germination and growth; (6) Self-propagation and persistence; (7) High percentage of surface coverage; (8) Low long-term maintenance. needs; and (9) Irrigation of vegetation in accordance with Section 17781 of this Article. III 7 .8-23 (6/18/90)