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Michael Williams <br /> • ® RAH Environmental,Inc. <br /> 1 d4ek3310 Swetzer Road <br /> Loomis,CA 95650 <br /> (916)652-5777■Fax:(916)652-8955 <br /> April 8, 1997 <br /> Piping Trench Specifications <br /> ► Backfill Material - 3/8" Peagravel <br /> ► Trench Lining Material - Geotextile Liner <br /> ► Trench Slope - 1/2" per foot. Back to the tanks <br /> ► Burial - 2' at the dispensers and 4' at the tanks <br /> I <br />