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The lost hold down weight of the <br />missing soil in the risers to grade <br />is also included later in the "Lost <br />Hold Down Force from Risers". <br />Riser Volumes Vol r <br />OD r <br />2 <br />4 Covertk <br />504 <br />658 gal  <br />Riser Buoyant Force BFr Vol r tk_wat <br />4204 <br />5491 lbf  BFr 9695lbf <br />Total Buoyant <br />Force <br />BF BFtk BFr115294lbf  tank plus risers <br />Fluid Ballast Weight Wtfld_ballast 0lbf <br />Design Buoyant Force DBF BF Wtfld_ballast115294lbf  buoyant force of tank and <br />risers offset by any ballast <br />Weight of Top Slab Over Tank <br />Weight of Top Slab <br />Over Tank <br />Slab directly over the tank. Any anchoring resulting from the extension <br />of the pad beyond the tank width and length will not be considered. <br />Will be submerged weight unless only a portion of the slab is <br />submerged. Weight is adjustred for amount that is submerged. <br />Tslab_sub Tslab WaterdepthWaterdepth Tslabif <br />0 otherwise <br />8in  thickness of slab <br />that will be <br />submerged <br />Wtslab Ltk OD tk Tslab_sub sub_conc Tslab Tslab_sub conc13992lbf  <br />Weight of Fill Directly Over Tank <br />Plan View Area of <br />Cylinder <br />Areacyl ODtk Ltk 2Lec 139ft2  plan view area of tank cylinder <br />using OD without end caps <br />Plan View Area of End <br />Caps <br />Areaend_caps 2 Areaec 79ft2  plan view area of 2 end caps <br />Plan View Area of Tank Areatk Areacyl Areaend_caps217ft2  <br />Cover to Middle of <br />Tank <br />Covermid_tk <br />ODtk <br />2 Covertk145 in  <br />Volume of Fill Over Tank The vol of the fill over the tank top is calculated by calculating the volume of <br />the plan area of the tank (using the tank OD) from the middle of the tank to <br />grade minus the top slab thickness and then subtracting the volume of the <br />tank that resides in this volume (1/2 of the tank volume) + 1/2 the volume of <br />the tank wall itself including the ribs + 1/2 the volume under the ribs. The <br />result is the volume of the fill directly over the plan area of the tank. The <br />lost hold down weight of the missing soil in the risers to grade is included <br />later in the "Lost Hold Down Force from Risers". <br />Tank Buoyancy, Rotten Robbie No 69, <br />Manteca CA, dwg 17366-001, 10ft DWT <br />Date Printed: 9/7/2023 Page 14 of 46