1202 W Edinger Ave - Plan - Laserfiche WebLink

Home Browse Search

Mater Dei High School October 20, 2023 Proposed Dance Studio, Santa Ana, California Project No. 3204.I 3204-I-01R (10/23) 8 In new pavement areas, the upper 1-foot, of the site soils should be removed and replaced as properly compacted fill. The exposed subgrade soils should be prepared as described under “Subgrade Preparation”. If space is available, the base of the removals should extend laterally a minimum of 5 feet beyond the building lines or the depth of removal, whichever is greater. Building lines include the footprint of the building and other foundation supported improvements such as stairwells, screen walls, trash enclosures, ramps, and canopies. Prior to grading, the corners of the areas to be overexcavated should be accurately staked in the field by the project surveyor. The project surveyor should confirm the limits of removal relative to the actual building to confirm that the recommended remedial excavations have been performed. GPI does not practice surveying; therefore, cannot confirm lines, grades, or limits of excavations. Where not removed by the aforementioned excavations, existing utility trench backfill within the planned building area should be removed and replaced as properly compacted fill. This is especially important for deeper fills such as existing sewers and storm drains. For planning purposes, removals over the utilities should extend to within 1-foot of the top of the pipe. For utilities which are 5 feet or shallower, the removal should extend laterally 1-foot beyond both sides of the pipe. For deeper utilities, the removals should include a zone defined by a 1:1 projection upward (and away from the pipe) from each side of the pipe. The actual limits of removal will be confirmed in the field. We recommend that known utilities be shown on the grading plan. Temporary construction excavations may be made vertically without shoring to a depth of 5 feet below adjacent grade. For deeper cuts, if required, the slopes should be properly shored or sloped back to at least 1:1 or flatter. The exposed slope face should be kept moist (but not saturated) during construction to reduce local sloughing. No surcharge loads should be permitted within a horizontal distance equal to the height of cut or 5 feet from the top of the excavation, whichever is greater, unless the cut is properly shored. Excavations that extend below an imaginary plane inclined at 45 degrees below the edge of any adjacent existing site facilities should be properly shored to maintain support of adjacent elements. Excavations and shoring systems should meet the minimum requirements given in the State of California Occupational Safety and Health Standards. 4.3.3 Subgrade Preparation Prior to placing fills or construction of the proposed structures, the subgrade soils should be scarified to a depth of 6 inches, moisture-conditioned, and compacted to at least 90 percent of the maximum dry density in accordance with ASTM D 1557. In areas where very moist to wet soils are encountered, processing of the subgrade may be omitted in order to reduce the potential for subgrade disturbance. In areas to receive pavements, the top 12 inches below the pavement base should be scarified, moisture-conditioned, and compacted to a minimum of 95 percent (90 percent for clayey soils) of the maximum dry density. Stabilization of subgrade soils exposed at depths greater than 2 to 3 feet below existing 1202 W Edinger Ave10/3/2024