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infiltrator IM-Series Tank MARCH 2015 _ INFILTRATOR' 3uoyancy Control Guidance Y tanks Before you Begin Concrete Deadmen Anchors This document presents recommended buoyancy control methods for Recommended concrete deadmen anchors include filled plastic half pipe, Infiltrator Systems Inc.'s(Infiltrator's)IM-Series tanks.Tank buoyancy precast parking bumpers and traffic barriers,and poured blocks.The control methods must be implemented according to state and/or local weight of the deadmen anchors combined with the weight of soil above regulations,which may supersede the guidelines in this document sides them provides buoyancy control when properly secured.Deadmen anchors If unsure of the requirements for a particular site,contact the local are placed at the bottom of the tank excavation on opposite sides of the tank.The deadmen anchors are fastened to each other with tie-down health department or permitting authority. straps placed up and over the tank at the locations specified for each tank model(see Figure 5. This document provides procedures to determine if tank buoyancy control _ -- is required based on site conditions.Please obtain the following information 15 in p _ to determine if control is necessary and what methods are applicable: mm] Concrete-filled plastic half pip • Infiltrator tank model w Use Schedule 40 PVC st pi having minimum inside diamete of 15 i ch 375 m • Maximum height of water outside the tank and above the tank botto ",l or HDPE corrugated pipe having a minimum elevation inside diameter of 18 inches(450 mm)cut in ha / • Depth of soil cover over the tank top J lengthwise.Fill with concrete having a minimu Once tank buoyancy control measures are determined to be requi nd �� c 1/ unit weight of 145 Ibs/ft'(2.32 metric tons/m� n i reinforced with three equally spaced 40-gra a method has been selected and implemented,refer to Infiltrator IM s \l � 1/2-inch(13 mm)diameter steel bars. • 61 Tank Installation.Instructions and Riser Connection Guidance docume ��.- lbs/ft(91 kg/m)mini as applicable,for completing the installation. Stee e How to Use this Document Concrete parking bumper 6 in 1. Become familiar with the descriptions in the Compatible Devices and Use commercially available steel-reinforced [150 mm] J^ '1 Products section. parking bumpers with typical dimensions of I 2.Verify that the water level outside the tank is below the outlet pipe 12 inches wide by 6 inches high(300 mm x 150 I ! 12 in saddle height using Step 1,Tables 1 and 2,and Figure 1. mm).Weight is 58 lbs/foot(86 kg/m)minimum. [300 mm] 3. Determine if buoyancy control is required using Step 1,Table 2. If buoyancy control is required,proceed to Step 2. I Concrete traffic barrier Use the respective table for the tank model from Step 2,Table 2 to Use commercially available steel-reinforced determine the appropriate buoyancy control methods for the site concrete traffic barrier or equivalent.Typical conditions. I l..,!p dimensions include a 24-inch-wide base 5.Once a preferred buoyancy control method is selected,follow the I.o tapering to a 6-inch-wide top,with a height 32 in of approximately procedures for Implementation provided in Step 3. [800 mm] j 32 inches(600 mm x 150 mm x 800 mm).Weight \ is 390 lbs/foot(580 kg/m)minimum. Parts and Supplies ,, . , Poured Blocks The parts and supplies necessary are to be purchased separately from the tank.All parts and supplies are either commercially available or available o i - ' ' \ \\ Concrete precasters can pour blocks of • l various dimensions and weights.Blocks are through Infiltrator's network of tank distributors.Some parts may require often an affordable option if they satisfy the fabrication on site using common construction practices. 24 in __„] weight requirements for use as buoyancy [600 mm] control(see Table 2 and the Supplemental Compatible Devices and Products Force section of Step 2 for more information). Infiltrator tanks are compatible with the following products for buoyancy • control: Helical Anchors • Tie-down straps:high-tensile-strength webbing,10,000 lb(4,500 kg) Chancel'"No Wrench Screw Anchors with minimum capacity,nylon or polyester,with corrosion-resistant hardware. a 6-inch(150 mm)diameter flight,Class 7, or equal.These anchors rely on the shear • Concrete deadmen anchors:concrete-filled plastic half pipe,precast strength of the soil combined with the weight i parking bumper,precast traffic barrier,or poured block. of the soil above the anchor flight to provide . :� rm holding strength.Proper installation is to • Helical anchors:Chance No-Wrench Screw Anchors with minimum 4 feet(1.2 m)below the bottom of the tank ' 6-inch(150 mm)diameter,Class 7 or equal. excavation and to within 5"of alignment .\\ with the webbing load.Determine the Tie-Down Straps proper locations for anchor installation to ��, ensure that tie-down straps will be aligned Straps are commercially available in varying �*R-'.4= properly for each tank model(see Step t1, lengths and with assorted hardware and 3:Implementation),and follow anchor 6 tightening options.Nylon or polyester manufacturer installation instructions. strapping with minimum 10,000 lb(4,500 kg)capacity is required for buoyancy control use with Infiltrator tanks.Place straps up and over the 1.1 .1 tank tank at specified locations only(see Figure 5).Tighten straps snugly with I \',. o ratchet or turnbuckle system to remove all slack and slightly pre-load Typical working torque: e system.All connections,fittings,and hardware must be corrosion "Rod 400 ft.Ibs..(1, N•m) ! esistant or coated with epoxy or other corrosion-resistant materials to 1'1 Rod 1,000 ft.lbs (1356 N.m) inhibit deterioration in the subsurface environment.Consider encapsulating w"Rod 2 30o ft.Ibs (3,118 N m) such components in heat-shrink tubing or painting on additional corrosion- ,GIi•' resistant coatings prior to burial.