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ARROW TANK WORKS <br />1701 SOUTH BARNEY STREET <br />Mailing Address: P.O. Box 563 <br />ANDERSON, CALIFORNIA 96007 <br />P (916) 365-5434 <br />INSTALLATION: <br />We recommend that our underground tanks be installed with a minimum <br />cover of two feet of compacted soil, or one foot of soil under a reinforced con- <br />crete pad of not less than 4" thick. However, in areas where the installed tank <br />ill be subjected to vehicular traffic, they shall be protected by a minimum of <br />1811 of compacted soil plus 6 to <br />of reinforced concrete, or " of asphalt paving <br />extending at least one foot from the tank in all directions, or by a minimum of <br />three feet of soil. The excavation shall be free of any liquid during the installa- <br />tion procedure. <br />The tanks shall be completely empty during installation to prevent any un- <br />due stress within the tanks. if it is necessary to fill the tanks with product before <br />backfilling, the product level ust not exceed the compacted backfill level. <br />The tank excavation shall be firm soil suitably graded level, and have " <br />of clean sand or " of pea gravel. The tanks shall be encompassed by clean <br />sand or pea gravel. There shall be no stones or other matter allowed to come <br />in contact with the tanks. <br />If the installation site is such that the tanks require a concrete balast slab <br />and hold down straps, refeF to our hold down chart and NFPA pamphlet 0. <br />Materia I used for backfiil must be capable of being 5% compacted. The <br />-material shall be placed in " layers and tamped down. Cradles or chocking <br />locks should not be used. They may cause tank failure due to stress <br />concentrations. <br />