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JAN 18 2018 Soil Ballast Geometry + ''L t Based on fidl scale float out tests in peagravel by Owens Corning(Now Containment Solutions), the maxim um wedge angle is 23 degrees. A conservative value of 15 degrees will be used, but any value between 0 and 23 degrees maybe selected. Wedge angles of zero will be used for multi tank installations with tanks side by side or end to end. ' Various soil wedge angles are used depending on the method of anchoring. or tanks without anchoring, the soil wedge at the ends of the tank and along the sides of the tank are onsidered. If multiple tanks are considered installed side by side, the side wedge will be truncated t a point half way between the tanks. Soil wedge at tank ends w/o anchor Soil wedge on tank sides w/o anchor system (max 23 deg) system, (max 23 deg) Owedge_end_tank=5deg Set end wedge angle Owedge_tank =0•deg Set side wedge angle (Owedge_end_tank )to 0 if (Owedge_tank)to 0 if the the tank will be installed tank will be installed end to end with another beside another tank tank or tanks with anchoring, the soil wedges acting on the tank and on the anchors can be independently et. The most conservative case is to use a soil wedge angle of 0 on the sides of the tank. In this case, my the soil directly over the tank and the soil wedge at the ends of the tank will be considered to be cting directly on the tank. The anchors will then utilize the column of soil directly over the anchor nd the soil wedge on the sides of the anchor. However, if a wedge angle is set for the tank sides, the soil in the wedge will be considered to be cting on the tank and not on the anchor. n both cases, it multiple tanks are considered installed side by side, the wedges will be truncated at a oint half way between the tanks. Soil Wedge at tank ends with Anchor stem System Soil Wedge at tank sides with Anchor S Y g y Owedge_end_tank_wa=Sdeg Set end wedge angle Set side wedge angle (Owedge_end_tank wa) �)wedge_tank_wa—Odeg ((�wedge_tank_wa)to 0 if to 0 if the tank will be the tank will be installed end to end installed beside with another tank another tank Soil wedge at dead man ends (max 23 deg) Soil wedge at dead man on tank sides (max 23 deg) Owedge_end_dm— 5de6 Set end wedge angle Owedge_dtn=0 deg Set side wedge angle (wedge end dm) to 0 if the (Owedge_dm)to 0 if the tank will be installed end tank will be installed to end with another tank beside another tank City Gas and Food-Lathrop CA-dwg 11313-002_8ft 12M_ver 2 60 10-17-16.xmcd Page 5 of 15 Date Printed: 2/7/2017