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AWARNING <br /> Do not stand under the tank. This could result in death,se . s 1/2" <br /> pe I injury or property damage. 1/8 <br /> 3.8.5.2.Visually check the interior of the tank for liquid. <br /> 3.8.5.3.Replace the protective covers in the service fittings and <br /> the reservoir fitting. <br /> 4.1. GENERAL <br /> 4.1.1.Xerxes tanks must be installed using either pea gravel or <br /> crushed stone as backfill material. <br /> 4.1.2.Using other than approved bedding and backfill materials <br /> without prior written authorization from Xerxes will void the tank <br /> warranty. FIGURE 4-2 <br /> AWARNING <br /> use 4.1.3.5. a more than 5%(by weight)of the material may pass <br /> Use of unapproved backfill material could catank through a <br /> failure and result in death, serious personal injury or #8 sieve. <br /> property damage. 4.1.3.6.It is recommended that the materials supplier certifies <br /> 4.1.3.Approved backfill material must meet the following that the material conforms to ASTM C-33 and any other <br /> specifications: applicable specifications. <br /> 4.1.3.1.The material is washed,free-flowing,and free of ice, 4.1.4.For additional information,refer to the Xerxes document, <br /> snow and debris. "Fiberglass Tank Backfill Guidelines." <br /> 4.1.3.2.The material conforms to the specification of ASTM 4.1.5. If material which meets these specifications is not <br /> C-33,par.9.1,size numbers 6 through 8 of Table 2. available,contact technical support at Xerxes Minneapolis for <br /> information on alternate materials and the process for approval. <br /> 4.1.3.3.When using pea gravel,the material is to be a mix of <br /> rounded particles,sizes between 1/8 inch and 314 inch. (See <br /> FIGURE 4-1.) <br /> AWARNING <br /> 3/4" Follow OSHA regulations for tank excavations. Collapse of <br /> 1/8" excavation walls could result in death, serious personal <br /> injury or property damage. <br /> 5.1. GENERAL <br /> 5.1.1.The installing contractor must take all precautions <br /> necessary to protect employees working in or near a tank <br /> excavation.These precautions should include,but are not <br /> limited to the following: <br /> 5.1.1.1.Locate and protect any utility installations near the <br /> excavation before opening the excavation. <br /> 5.1.1.2.Secure the walls of the excavation. <br /> FIGURE 4-1 <br /> 5.1.1.3.Prevent exposure of employees to hazardous fumes <br /> 4.1.3.4.When using crushed stone,the material is to be a mix of from the excavation. <br /> angular particles,sizes between 118 inch and 112 inch. (See <br /> FIGURE 4-2.) 5.1.1.4.Protect employees from hazards associated with water <br /> accumulation in the excavation. <br /> 9 <br />