SR0082410 - Laserfiche WebLink

Home Browse Search

7.4.VENTING INTERSTITIAL SPACES NOTICE NOTICE Make sure that no heavy objects are allowed to distort the All wet monitoring systems must be vented for proper opera- containment sump top after final assembly.This includes tion.Failure to do this could result in damage to the tank and/or the street box and concrete pad.No weight should be surrounding property. transferred to the tank.Failure to follow this notice could result in property damage. 7.4.1.When the tank's interstitial space is filled with amonitoring 7,5.6.To complete the containment sump installation:' fluid,the space must be vented.It is sufficient to drill a /a-inch-diameter . Backfill to the top of the containment sump system. [6-mm-diameter]hole in the side or cap of the reservoir standpipe as supplied by the installer.If the groundwater level could be high enough • Backfill around the outside edge of the containment sump, to enter a drilled vent hole,install a vent line from the standpipe and making sure that no backfill is on top of the containment sump.See Figure 7.1,Backfill A. position it above the high-water level. • Isolate the containment sump from all traffic loads. 7.4.2.When the interstitial space is dry,it is not necessary to vent • Install a concrete form/barrier(for example,the concrete pad/street- the space to atmosphere. box frame)to allow a minimum 3-inch[7.5 cm] clearance between 7.5.INSTALLING CONTAINMENT SUMPS any load-bearing item and the containment sump top. • Typically,a sheet of plywood(or other material)is used as a barrier 7.5.1.Containment sumps come in a variety of models and sizes. and is set on the backfill to ensure that there is at least a 3-inch 7.5.2. Instructions for the different models are found in supplemental [7.5 cm]clearance above the containment sump top.See Figure 71, materials.See the Introduction for information on where to obtain Barrier B. supplemental instructions. • Choose a street-box size that allows enough clearance around the containment sump top opening for proper operation 7.5.3.The containment sump provides an enclosure for a submersible of the cover. pump and a termination point for secondary piping systems. • Set the street box,and check for clearance to allow access • It provides containment of product from the pump and/or piping and space to remove the watertight cover.See Figure 7.1, connections. Street Box C. • It is designed to be monitored continuously using electronic sensors. • Continue with backfill,as required,to subgrade.See Figure 71, 7.5.4. Before installing containment sumps: Backfill A. • consult all codes and regulations of appropriate governmental • Maintain good drainage of water away from the access opening agencies to ensure proper monitoring compliance of the containment sump top when installing the surface pad. • sssure that all containment sumps will be isolated from See Figure 7-1,Surface Pad D. traffic loads Figure 7-1 • perform a visual inspection of the sump for potential shipping damage No Backfill on the Barrier B • contact the manufacturing facility that shipped the tank if damage is Containment Sump detected • check to make sure the sump is the correct length for intended Surface burial depth. Pad D Street Box C Backfill A • obtain the specific containment sump supplement for the application installation.See Introduction for list of supplements. 7.5.5.Install the containment sump according to the supplemental instructions that apply.Go to zcl.com to find additional copies of the supplements. A CAUTION Always wear eye protection and gloves when handling,grinding, cutting and attaching the containment sump unit.Failure to do so TYPICAL could result in minor or moderate injury. INSTALLATION (Watertight Cover Shown) NOTICE Do not drop the containment sump assembly components or allow the sump body to roll.Since high winds could damage the sump components,protect and secure all pieces if windy condi- tions ondi tions arise.Failure to follow this notice could result in damage to surrounding property. 25