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[OSHPD 1R, 2 & 5] Unless otherwise recommended by the soils report, open or backfilled trenches parallel with a footing shall not be below a plane having a downward slope of 1 unit vertical to 2 units horizontal (50-percent slope) from a line 9 inches (229 mm) above the bottom edge of the footing, and not closer than 18 inches (457 mm) from the face of such footing.
Where pipes cross under footings, the footings shall be specially designed. Pipe sleeves shall be provided where pipes cross through footings or footing walls and sleeve clearances shall provide for possible footing settlement, but not less than 1 inch (25 mm) all around pipe.
Exception: Alternate trench locations and pipe clearances shall be permitted when approved by registered design professional in responsible charge and the enforcement agent.

Related Code Sections

1809.14 Soils and Foundations, Pipes and Trenches
settlement, but not less than 1 inch (25 mm) all around pipe. Exception: Alternate trench locations and pipe clearances shall be permitted when approved ...
1809.14 Soils and Foundations, Pipes and Trenches
settlement, but not less than 1 inch (25 mm) all around pipe. Exception: Alternate trench locations and pipe clearances shall be permitted when approved ...
1809A.14 Soils and Foundations, Pipes and Trenches
inch (25 mm) all around pipe. Exception: Alternate trench locations and pipe clearances shall be permitted when approved by registered design ...
1809A.14 Soils and Foundations, Pipes and Trenches
inch (25 mm) all around pipe. Exception: Alternate trench locations and pipe clearances shall be permitted when approved by registered design ...
1809A.14 Soils and Foundations, Pipes and Trenches
footing settlement, but not less than 1 inch (25 mm) all around pipe. Exception: Alternate trench locations and pipe clearances shall be permitted ...