Utility trenches near foundation footings must maintain an eighteen-inch horizontal clearance boundary where parallel digging is prohibited. Backfill and compaction must comply with the geotechnical report for piers. Excavations adjacent to footings must respect the defined slope and separation limits to protect structural integrity.
18" NO DIGGING FOR PIPE TRENCH PARALLEL TO FOOTING WITHIN THIS BOUNDARY UTILTY TRENCHES BACK FILL & COMPACT PIER GEOTECHNICAL REPORT 2 1
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