Specifications include, but are not limited to: Power clean the manhole walls prior to liner installation, remove any loose or deteriorated materials, fill voids and rebuild benches. On Map 4: The plastic liner shall be removed as much as necessary to a point where there is a solid liner bond to solid concrete wall. The Contractor is required to satisfy the Engineer or Inspector of the condition. Complete removal of the plastic may be required. Approved Manhole Lining Systems: Raven 405, Sauereisen 210S, Sherwin-Williams Dura-Plate 6100, Sherwin-Williams SherFlex, Spectrashield, Warren Environmental S301 and Zebron. The new liner shall adhere to the manhole wall, other wall materials or otherwise be anchored to the wall so it remains in place. All openings, seams and edges shall be sealed with a product that adheres to all adjacent materials.