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CITY OF SANTA ANA, CALIFORNIA STANDARD SPECIFICATION NUMBER 31. (As adopted by Ordinance No ..................... , Passed .................... day of .......................... 12940 Portland Cement Concrete Curbs, Gutters, & Sidewalks. Part I. Grading Construction. S~CTION 1. GRADING AREA. Unless specified by plan or ordinance thc portion of thc street or alley to be graded shall be as follows: (a)' FOR CURBS AND GUTTERS. When curbs or gutters or both are to be con- structed, the area to be occupied by the curb or 8utter or both, shall be brought to a sub- grade, and, unless otherwise specified, the area between the curb line and the sidewalk shall be graded flush with the tops of the curb and sidewalk. Where no sidewalk exists, the area between the curb line and the property line shall be graded flush with the top of the curb and with a rise of one-fourth (~) inch per foot to the property line. (b) FOR SIDEWALKS. When sidewalks are to be constructed, the area to be occupied by the sidewalk shall be brought to a suhgrade and, unless otherwise specified. the remaining area between the curb lines and property lines shall be graded flush wlth the sidewalks and the tops of the curbs, or flush with the surface of the sidewalk when there is no curb. SECTION 2. ROUGH GRADING. Rough grading shall include all fiIlifig and removal of excess earth, stone, trees, old pavements, sidewalks, curbs, gutters, driveways and any other str~ctures or ohjcctlonabI¢ materlal found wlthln the limits of the improvements to be made. Any of thc above men tioned objects or materlal shall be removed, whether or not it is within the limits of the improvements, when so noted on the plans. Plowing or excavating sound material shall be done to a depth not greater than six (6) inches below the subgrade elevation. Excavated material not rcqulrcd for fills shall be removed from the street as soon as excavated. (a) FILLING. Thc space over which fills are to be made shall first be cleared of all brush, timber, trash or debris. All filling shall be done with good sound earth, sand or gravel, and no oil cake or other lumpy material, or material of a perishable, spongy, or otherwise improper nature shall be used in filling. Fills shall be made in layers not to exceed four (4) inches in depth before tamping. Each layer, after being leveled off shall be thoroughly dampened and while moist shall be tamped until hard and unyielding. (b) MUD AND SOFT MATERIAL. When mud or other soft or spongy material is encountered, it shall be removed and the space filled with gravel or good earth, which shall be pla_ced in layers as hereinbefore set forth for fills, and thoroughly tamped. The contractor will not be required in such cases to excavate mud or other soft or spongy material to a depth greater than two (2) feet below grade~ After the rough grading has been completed, as specified hereinbefore, the foundation shall be brought to subgrade and tamped or rolled until solid. Where the sub-grade is com-