COMPLIANCE INFO_2002-2006 - Laserfiche WebLink

Home Browse Search

LJ ® WARNING If product is used as ballast, exercise special care in handling. Safeguard against sparks, fire or product spills. Improper handling of product could cause a fire or explo- sion and result in death or serious injury, ® WARNING The tank shall be adequately vented to prevent the development of vacuum or pressure when filling or emptying the tank. Failure to properly vent the tank could cause tank failure and result in death or serious injury. 10.1. GENERAL 10.1.1. In most anchoring systems, a tank is not adequately protected against flotation until the tank is fully backfilled and the top slab is in place. Therefore, during the installation process, the tank should be ballasted completely after the backfill is even with the top of the tank and postinstallation testing has been successfully completed. 10.1.2.Only under wet -hole conditions should ballast be added before the backfill is even with the top of the tank. (See SECTION 8.) e e 11.1. INTERNAL PIPING 11.1.1. All piping must conform to all applicable codes and standards. (See SECTION 1.) I CAUTION All internal piping must be at least 4 inches [6 inches for 12 -foot -diameter tanks] from the tank bottom. Failure to do this may damage the tank or surrounding property. CAUTION All metal fittings and other metal components must be coated to protect against corrosion. Failure to do this may result in damage to these parts or to surrounding property. 11.1.2. Refer to FIGURE 11-1 along with TABLE 11-1 to determine the correct dimensions for sizing internal piping. B&E H G -A&D Dimension Line Dimension Line Single -Wall & Double -Wall II Double -Wall I B(:nG C A (!FID Single -Wall Double -Wall 11 Double-WallI Ribbed Outer Wall Smooth Outer Wall Note: 1. All fitting dimensions are measured from the top of a service fitting to the inside bottom of the tank and include gauge -plate clearance. 2. Interior diameters do not include gauge -plate clearance. FIGURE 11-1 18 1�1 Interior Dimensions in FIGURE 11-1 Tank Diameter 4' 6' 8' 10' 12' "A" 491/4" 73" 92" 121" 138114" "B" 54112" 78" 98" 126" 1431/4" "C" 48" 713/8" 913/16" 119 3/16" 136 5/8" "D" 491/2" 72 3/4" 911/2" 120" "E" 55" 77 3/4" 971/4" 125 3/4" "F" 48" 705/8" 90 5/8" 1181/2" "G" 511/2" 751/8" 95 3/8" 1231/2" "H" 56 5/8" 801/4" 1001/2" 128 518" 48" 713/8" 913/16" 119 3116" TABLE 11-1 11.2. EXTERNAL PIPING ®WARNING When pressure testing the external piping, the tank must be isolated from all piping. The test pressures for external piping could cause tank failure and result in death or serious injury. CAUTION When extending monitoring or vapor -recovery piping to the surface, make sure the at -grade fittings are different from any till fittings and will not accept standard fill hoses. 11.3. VENTING TANK WARNING All underground tanks/compartments shall be adequately vented to prevent the development of vacuum or pressure when filling or emptying the tank. Failure to properly vent a tank or compartment could cause tank failure and result in death or serious injury. 11.3.1. The single-wall tank is designed to operate at atmos- pheric pressure. 11.3.2. In the double-wall and triple -wall tank, the primary tank is designed to operate at atmospheric pressure. 11.3.3. The tank's venting system must be adequately sized to ensure that atmospheric pressure is maintained at all times, including during filling and emptying of tank. 11.3.4. Whenever installing overfill protection, such as alarms, automatic shut-off devices ("flapper valves") or vent -restriction devices ("ball -float valves"), follow the instructions provided by the manufacturer of the overfill -protection device and consult the authority having jurisdiction to determine the level at which the overfill protection should operate.