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. accommodate this reduction in strength Please consult factory for applications with service temperatures greater than 100°F 212 PRESSURE-All standard SII tanks are designed for use at atmospheric pressure Pressure or vacuum situations can cause excessive deformation or damage to the tanks. Please consult factory for applications which may develop pressure or vacuum situations 2 1 3 CHEMICAL COMPATIBILITY-Suitability of the tank assembly(tank,fittings,gaskets, etc)for storing a particular chemical must be confirmed by chemical data(this should have been done by the tank distributor or the end user pnor to placing the tank order) However, changes to the tank(i a tank accessories, or the service of the tank)can occur Please consult the factory with any questions 214 LOCATION REQUIREMENTS-There may be location requirements which should be considered prior to placing the tank into service Some items to consider are secondary containment, locating the tank in a flood plain, locating a tank in an area where seismic or wind forces may be experienced,and heat from surrounding equipment It is the responsibility of the end user to ensure that all location requirements have been taken Into consideration. Check for all federal,state, and local regulations that may apply to the tank installation A thorough evaluation of the proposed tank location prior to tank installation is recommended 2 1 5 TANK ENTRY PRECAUTIONS- If entry into the tank is necessary, be sure to take all necessary precautions and follow all applicable regulatlons Entry into a tank should be considered a "CONFINED SPACE ENTRY"with appropriate OSHA safety precautions required There are many safety practices which should be considered depending on the specific conditions at the site Please follow all local, state, and Federal rules and regulations . 22 FOUNDATIONS AND SUPPORTS 2 2 1 Vertical flat bottom tanks should be positioned on a concrete pad providing adequate support and a method to attach a tank restraint system (see Section 5 for restraint system pad placement criteria) Concrete pad design must be completed by the construction site engineer based on the specific application A sand mound support can be placed under the tank bottom to promote tank drainage and extend tank life in certain applications This is recommended for all tanks 10,000 gallons and larger The sand should be a construction grade utility sand or finer The tank and pad placement must be done to prevent any erosion of the sand from under the tank Please refer to Figure 21 The sand mound must be very uniform without lumps or foreign objects Per the chart in Figure 21, draw a circle on the tank pad and rake the sand uniformly with zero elevation at the circle perimeter and an elevation in the center per the chart In Figure 2 1 The chart recommendations are nominal dimensions The best support is a sand mound that follows the normally convex shape of the tank bottom If the tank bottom is not as convex as the dimensions shown for the sand mound in Figure 21,then follow the tank bottom Adjust the sand mound shape/size so the tank has minimal contact with the sand when properly centered on the mound 222 Vertical flat bottom tanks with SUMO fittings may require a notch in the concrete support pad just in front of the SUMO fitting for piping and piping accessories The SUMO fitting has a:t5°tolerance for fitting projection off horizontal Since the SUMO fitting comes out from the tank very near ground level,concrete support pads which project past the SUMO fitting may interfere with the SUMO and/or its piping accessories SlI recommends that the support pad be notched to provide adequate clearance for piping and tank expansion/contraction movement Please refer to Figure 2 2. 223 Cone bottom or horizontal tanks require specifically designed support structures Inadequate or Improperly designed support structures may cause premature tank failure Therefore,any support structure that Is not of SA manufacture must be approved by SII In writing or ALL WARRANTIES WILL BE VOIDED 4