Except as described by the transition requirements of section 360.4 of this Title, all new landfills, lateral and vertical expansions of existing landfills, and subsequent development at existing landfills must conform to the requirements set forth in this Subpart.

(b) The owner or operator must submit engineering reports, design drawings, and specifications for all new construction of landfill components described in this Subpart prior to construction. Construction must not commence before written approval is received from the department.

(c) The landfill liner and leachate collection and removal system must be designed and constructed to effectively protect surface and groundwater resources from uncontrolled releases of landfill leachate. The components of the liner system must be placed to achieve a minimum slope of no less than two percent, except along leachate collection pipes, which must have a minimum slope of one percent.

(d) Any geomembrane, geosynthetic clay liner (GCL), geosynthetic drainage layer, geocushion or other geosynthetic material installed on landfill side slopes must be designed to minimize shear stresses and to withstand the calculated tensile forces acting upon the geosynthetic materials by the transfer of anticipated destabilizing forces to the landfill subgrade. At a minimum, the design must consider the maximum friction angle of any soil-geosynthetic or geosynthetic-geosynthetic interface, along with seepage forces expected in the side slope soil drainage layer in the primary leachate collection and removal system, to ensure that overall slope stability is maintained and to meet the factor-of-safety requirements specified in section 363-4.3(c)(3) of this Part.

(e) For lateral expansions adjacent to existing landfills that do not meet the liner system requirements of this Part (i.e., the existing liner system is single composite and the expansion requires double composite), any encroachment on the existing landfill's side slope must be designed and constructed to meet the liner system requirements of this Part.

(f) Landfills must be designed to minimize the need to decommission existing monitoring wells and to install new monitoring wells as a result of progressive cell construction into areas where monitoring wells are located.

(g) A pre-construction meeting must be held prior to commencement of construction. This meeting must include, at a minimum:

(h) The owner or operator must notify the department at least seven days prior to each of the following activities: