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® INSTALLATION PROCEDURE <br /> • Determine if geotextile fabric is required for your <br /> ! < ' installation (see Section F for details). <br /> Do not enter the tank excavation unless all OSHA ° All tank holes must have a minimum of 12" (18"for <br /> requirements are followed. wet holes) and a maximum of 24"of approved backfill <br /> between the bottom of the tank and the bottom of the <br /> Collapsing excavation walls may causedeath ! excavation or concrete anchor pad. <br /> or serious injury. <br /> • Place tank in excavation with lifting cables attached to <br /> BEFORE YOU BEGIN lift lugs provided on tank,while maintaining control of <br /> It is important to review all instructions to make sure you tank with guide ropes(see Figure A-2 or A-3). <br /> are compliant with the proper procedures.This includes: ° Set tanks directly on backfill bed. <br /> • Bed and Backfill • Take the"First Vertical Diameter Measurement"and <br /> • Pre-installation Testing record the value on the Tank Installation Checklist <br /> (see Figure I-2). <br /> • Hole Size/Burial Depth <br /> Figure I-2 <br /> • Anchoring <br /> First llartl ' Measurement <br /> TANK VERTICAL DIAMETER MEASUREMENTS <br /> Each vertical diameter measurement is used to AM IX <br /> determine the tank's deflection. If at any point the <br /> deflection measurements exceed the values in Table 1-1, <br /> stop the installation and contact Tank Technical Support. Xi��i <br /> During installation, vertical diameter measurements must <br /> be taken and recorded on the Tank Installation Checklist <br /> after each of the following steps: <br /> • "First Vertical Diameter Measurement" �Baci fiii Bed �X\�� <br /> - Placement of tank on backfill bed X��j <br /> • "Second Vertical Diameter Measurement" <br /> - Anchoring completed <br /> (only applicable if mechanical anchoring is used.) Measure from the bottom of the tank <br /> • "Third Vertical Diameter Measurement" to the bottom of the fitting <br /> - Backfill to tank top. • If mechanical anchoring is used,after anchoring <br /> • "Fourth and Fifth Vertical Diameter Measurements" is completed,take the"Second Vertical Diameter <br /> - Backfill to subgrade, before the concrete pad. Measurement"and record the value on the Tank <br /> Installation Checklist. If this value does not equal the <br /> Separate vertical diameter measurements must be "First Vertical Diameter Measurement', loosen the <br /> recorded for each tank compartment. anchor straps(see Figure 1-3). <br /> • All measurements for vertical deflection are made Figure 1-3 <br /> from the bottom of the tank to the bottom of the fitting. <br /> • All measurements should be made in inches or $eqondWrtical,Diam6teeMeastiroment, <br /> millimeters using a standard nonmetallic gauge stick. �//\\�/ <br /> • All measurements should be made through the fitting <br /> closest to center of tank or each compartment. <br /> Anchor /\\/ <br /> Refer to Table 1-1 for maximum deflection values. straps rghc <br /> TABLE 1-1 <br /> Tank Diameter Maximum Deflection 2 <br /> 4' '/z" (12mm) <br /> 6' s/d' (19mm)MM <br /> \\\ <br /> 10' 1%" (38mm) <br /> 12' 1%' (38mm) <br /> Measure from the bottom of the tank <br /> to the bottom of the fitting <br /> 19 <br />