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surface to tolerances of FF15 (floor flatness)and FL13 (floor levelness) for slabs-on-grade and FF15 for elevated slabs,measured according to ASTM E 1155. Slope surfaces uniformly to drains where required. After leveling,roughen surface before fmal set with stiff brushes,brooms,or rakes. I. Float Finish: Apply float finish to monolithic slab surfaces to receive trowel finish and other finishes as specified;slab surfaces to be covered with membrane or elastic waterproofing, membrane or elastic roofing,or sand-bed terrazzo;and where indicated. After screeding,consolidating and leveling concrete slabs,do not work surface until ready for floating.Begin floating,using float blades or float shoes only,when surface water has disappeared,or when concrete has stiffened sufficiently to permit operation of power- driven floats,or both. Consolidate surface with power-driven floats or by hand-floating if area is small or inaccessible to power units. Finish surfaces to tolerances of F 48 (floor flatness)and FL18 floor levelness)for slabs-on-grade and FF18 for elevated slabs, measured according to ASTM E 1155. Cut down high spots and fill low spots. Uniformly slope surfaces to drains. Immediately after leveling,refloat surface to a uniform,smooth,granular texture. J. Trowel Finish: Apply a trowel finish to monolithic slab surfaces exposed to view and slab surfaces to be covered with resilient flooring,carpet,ceramic or quarry tile,paint,or another thin film-fmish coating system. After floating,begin first trowel-finish operation using a power-driven trowel. Begin final troweling when surface produces a ringing sound as trowel is moved over surface. Consolidate concrete surface by final hand- troweling operation,free of trowel marks,uniform in texture and appearance,and finish surfaces to tolerances of F120(floor flatness)and FL17 (floor levelness)for slabs-on-grade and FF20 for elevated slabs, measured according to ASTM E 1155. Grind smooth any surface defects that would telegraph through applied floor covering system. K. Trowel and Fine Broom Finish: Where ceramic or quarry tile is to be installed with thin- set mortar,apply a trowel finish as specified,then immediately follow by slightly scarifying the surface with a fine broom. L. Nonslip Broom Finish: Apply a nonslip broom finish to exterior concrete platforms, steps,and ramps,and elsewhere as indicated. Immediately after float fmishing, slightly roughen concrete surface by browning with fiber-bristle broom perpendicular to main traffic route. Coordinate required final finish with Architect before application. M. Non-Slip Abrasive Finish: At exterior platforms,ramps, stairs,slabs at entry,stoops and interior ramps and other areas indicated on drawings. Blend abrasive aggregate with Portland cement in proportions recommended by manufacturer of aggregate. Float finish concrete surface,apply approximately two-thirds of blended material to surface by method that insures even coverage without segregation. Float surface immediately after application,after material has been embedded. Remainder of blended material shall be applied to surface at right angles to previous application. Follow with second floating, embed material and complete with broomed floated trowel finish to expose non-slip aggregate. Rate of application shall not be less than 25 pounds per 100 square feet. ADDENDUM#1 1607.001 -ORONO ICE ARENA (CP-2) Page 03300- 10