J_2024 05 09_West Orange Stormwater Management Plan

DESIGN FOUNDATION SUBGRADE LEVEL SUITABLE NATURAL BEARING STRATUM ALTERNATE MIN. LIMITS OF BOTTOM OF FOUNDATION EXCAVATIONS DETERMINED BY LEAN CONCRETE, FLOWABLE TYPE OF BACKFILL MATERIAL FILL OR STRUCTURAL BACKFILL B+1" STONE BACKFILL SUGGESTED FOUNDATION OVEREXCAVATION DETAIL NOT TO SCALE = Width of foundation. = Depth of overexcavation of unsuitable materials below bottom of foundation subgrade to surface of suitable bearing stratum. Lean Concrete: Minimum 2,000 psi. Stone Backfill: Clean 3/4 inch crushed stone or washed gravel; separate stone from adjacent soils on sides and bottom using filter fabric (Mirafi 140, or equivalent). Structural Fill Backfill: Approved granular soils spread in lifts on the order of 6 to 8 inches in loose thickness and compacted to at least 95 percent of maximum dry density as determined by the ASTM D1557 test procedure. Ny PLATE 10