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Y <br /> TerraVista NW,LLC Operation and Maintenance Procedures • <br /> Frame not sitting flush on top Frame is <br /> slab, i.e., sitting flush on <br /> separation of more than 3/4 the riser rings <br /> inch of the frame or top slab and <br /> from the top slab. Frame not firmly <br /> securely attached. <br /> attached <br /> Fractures or Maintenance person judges Basin replaced <br /> Cracks in that structure is or repaired to <br /> Basin unsound. design <br /> Walls/Botto standards. <br /> m Grout fillet has separated or Pipe is <br /> cracked wider regrouted and <br /> than 1/2 inch and longer than secure at basin <br /> 1 foot at the wall. <br /> joint of any inlet/outlet pipe <br /> or any evidence of soil <br /> particles entering catch basin <br /> through <br /> cracks. <br /> Settlement/ If failure of basin has created Basin replaced <br /> Misalignme a safety, or repaired to <br /> nt function, or design problem. design <br /> standards. <br /> Vegetation Vegetation growing across No vegetation <br /> and blocking more blocking <br /> than 10% of the basin opening to <br /> opening. basin. <br /> Vegetation growing in No vegetation <br /> inlet/outlet pipe joints or root <br /> that is more than six inches growth present <br />