8/27 cleaned and televised all underground ductwork. Installed 4 spot liners 2 liners on 45 degree bends. One liner on 90 degree bend and one spot liner on straight coupling. 8/28 Applied trenchless spincast mortar to all underground couplings that we did not install spot repair liners. Repaired register vents and furnace box with trenchless spincast mortar. 8/29 Applied first application of duct armor to all underground ductwork and furnace box. 9/5 Applied second application of duct armor to all underground ductwork and furnace box