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• Step 2-Determine Buoyancy Control Method Step 2 is used if the Step 1 analysis shows that buoyancy control is required for the tank model and the conditions of installation.As before,the maximum height_of_the_watecoutside-of_the_tank_and_above_the_tank.bottom-AND_the_depth_ofsoilcovecabovethe_tank_top_must_be known_focthe_installation conditions to complete Step 2. Table 3 Instructions For each tank model,find the Case row on the left side of the table that corresponds to both the water height(Parameter I)and soil cover measurements (Parameter II)for the tank installation conditions.Follow the row to the right fora listing of the appropriate buoyancy control methods for the installation conditions under each method description column.Refer to the Compatible Devices and Products and Step 3-Implementation sections of this document for additional information. • Table 3:Buoyancy Control Selection • Ror buoyancy Control Methods knintmnne per side of tan x rnnmefer l , Parameter li Minimum c up emental b Case t+ksterhelQhtaboretenkbottam 5 Soil cover depth above force required Concrete-titled Concrete paring Concrete traffic eitcat tor tank top (total,both tank skies) haft'pipe016 IR:g.000:014Z111:Ilitbarriers attohars t (ml e) (mfin,lengtttls�de) In engthJatde} ttgltdstde) F A ARAAZA 1 36 in(900 mm)to outlet pipe saddle' 6 in(150 mm)to 12 in(300 mm) 2,200 lbs(1,000 kg) 3.8 ft(1.2 m) 3.8 ft(1.2 m) 3.8 ft(1.2 m) I2 0"*51,i7",:!i 36 in(900 mm)to outlet pipe saddle' 6 in(150 mm)to 12 in(300 mm) 2,700 lbs(1,225 kg) 4.2 ft(1.3 m) 4.5 ft(1.4 m) 4.2 ft(1.3 m) 2 1 E ^=30 in(750 mm)to 36 in(900 mm) 6 in(150 mm)to 12 in(300 mm) 1,900 lbs(865 kg) 5.5 ft(1.7 m) 5.5 ft(1.7 m) 5.5 ft(1.7 m) 2 36 in(900 mm)to outlet pipe saddle' 6 in(150 mm)to 12 in(300 mm) 5,100 lbs(2,325 kg) 6.9 ft(2.0 m) 8.0 ft(2.4[n) 5 5 ft(1.7 r+) 2 N.e 1 -'i.30 in(750 mm)to 36 in(900 mm) 6 in(150 mm)to 12 in(300 mm) 3,000 lbs(1,365 kg) 7.7 ft(2.3 m) 77 ft(2.3 m) 7.7 ft(2.3 m) 2 2 ;; 36 in(900 mm)to outlet pipe saddle' 6 in(150 mm)to 12 in(300 mm) 6,700 lbs(3,050 kg) 8,5 ft(2.6.m)- 10.5 ft(3.2 m) • 7.7 ft(2.3 m) 2 s ids �,z 1 -f 30 in(750 mm)to outlet pipe saddle' 6 in(150 mm)to 12 in(300 mm) 4,300 lbs(1,955 kg) '6.3 ft(2.0 m) 8 5 ft(2.0 m) 6.3 ft(2.0 m) 2[ NOTES: 1.See Supplemental Force discussion below. 2.IM-Series outlet pipe saddle height is 43 inches(1,075 mm)above tank bottom. 3.TW-1250 and TW-1500 outlet pipe saddle height is 39 inches(975 mm)above tank bottom. Supplemental Force The minimum supplemental downward force required is included in Table 3 to allow custom buoyancy control methods.These values Include a factor of safety of 1.5 applied to the calculated force required to restrain the tank.Custom-designed buoyancy control methods shall consider saturated conditions. So long as buoyancy control is provided that supplies the minimum weight listed in the table(for poured-concrete blocks or other methods designed by third parties),the tanks will be stable for the water height outside the tank and above the tank bottom and corresponding soil cover conditions.All Infiltrator strapping and fastening recommendations would still apply for custom-designed buoyancy control methods.Contact Infiltrator's Technical Services Department with any questions regarding supplemental force requirements. • • • Contact Infiltrator Systems'Technical Services Department for assistance at 1-800.221-4436.