A solid waste manager estimates that the new community landfill will have an air space of 150,000yd3. Of this volume, 20% will be used for cap, liner, and cover material. The community generates 660yd3 of solids waste per week. Assuming the density of the solid waste when collected is 200lb/yd3 and it is 1200lb/yd3 in the landfill after compaction, estimate the volume that will be used up at the landfill per week (yd3). For the conditions described above, what is estimated the lifetime of the landfill (years)