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Contract No. 78-1 <br />TS/3 <br />is placed, all topsoil shall be removed. All fill shall be <br />mechanically packed to eliminate any major settling of the <br />ground, `'' <br />All fill under concrete floor and steps shall be compacted <br />to 95% of maximum I4odified Proctor Density. The Contractor <br />shall notify the owner when the fill is ready for testing, <br />and the owner may elect to contact the testing laboratory <br />to test the fill for compaction. No slabs or surfacing <br />shall be placed in these areas until the results of the <br />tests are made known to the owner and/or the owner has <br />given its prior approval. The owner shall pay for any <br />tests ordered and the Contractor shall pay for all re- <br />tests of material which fail to meet specifications. <br />F. Backf ill <br />1. All backfill around the foundation shall be clean <br />material, not frozen, and completely free of all con- <br />struction and other debris and shall be thoroughly <br />tamped to insure no loss of elevation. Excavations and <br />other voids to be filled shall be thoroughly cleaned of <br />all construction and other debris. <br />2. Promptly backfill excavations as work permits, but not <br />before concrete footings, etc., have attained full design <br />strength. <br />G. Gravel Base Fills <br />Gravel base fills under concrete surfacing shall -consist <br />of sound, durable particles of gravel, which may include <br />limited amounts of fine soil -particles as binding material. <br />Gravel shall not contain sod, roots, plants, and other <br />organic matter, or any other objectionable materials. <br />Gravel shall conform to Mlinnesota Department of Highways <br />Specifications for Highway Construction, Class 2. The fill <br />shall be compacted to a uniform compaction as called for in <br />paragraph E., Article 2.02. <br />2.03 CONCRETE: <br />All concrete shall be ready -mixed, 3000 lb. test strength. <br />A. Footinfs and Foundations: <br />1. Subn_rade. Foundations. and footings shall rest on <br />compacted or undisturbed subsoil. <br />2. Forms. Build forms so as to permit their removal from <br />exposed surfaces without damage to the green concrete. <br />3. Reinforcing. j einforce footings with 2 - L. bars con- <br />tinuous. Reinforce 18" dia . post footing with 4 - T5 <br />