9 Handling/Preparation Remember to barricade tank areaComplete installation checklistReview shipping packet contents
10 Handling/Preparation The Installation Checklist:Is included in the installation instructions, found in the shipping packetMUST be filled out for each tank on every projectMUST be retained by the tank owner and provided, at a later time, to CSI to validate any future warranty claim
11 Handling/Preparation All tanks must be mechanically unloadedChock tanksCarefully unload all accessories to prevent damageUse provided shipping pads or approved tank backfill for temporary job site storage
12 Handling/Preparation When tanks arrive at the job site, they should always be mechanically unloaded
13 Handling / Preparation - Tanks There are different tank orientations for unloading or lifting into the excavation.Identify the tank lift lug orientation and use the appropriate method to lift the tank.
15 Bed & Backfill Always use approved pea gravel or crushed stone Require sieve analysis from your backfill supplierDo not use sand or native soilAlternative materials must be approved in writing by CSI Tech Support prior to installationBackfill calculator on CSI website to confirm sieve analysis
16 Bed & Backfill Clean and washed backfill material only. Crushed Stone no larger than 1/2”Rounded Pea Gravel no larger than 3/4”No more than 5% passing #8 sieve
17 Bed & BackfillIf backfill materials that meet CSI’s requirements are not available, alternative materials can ONLY be used if written permission is obtained from CSI prior to installation.
19 Testing Single-Wall Water Tanks Important Warning For all Tests Never pressurize tank over 5 psig or 3 psig for 12’ diameter tanks
20 Testing Single-Wall Water Tanks Determine which test procedure is appropriate before you beginAir-Testable vs. Non Air-Testable tanksSingle-Wall Tank Air Tests are in Sections D-1, D-2, D-3 (Pre Installation)Water Test for Non Air-Testable Tank is Section D-10 (Post Installation)Follow each step of the instructions provided in the Tank Installation Instructions INST 6001
21 Testing Air-Testable Tanks All air-testable tanks require a pre installation air/soap testAll potable water tanks require a pre installation air/soap testNon air-testable tanks require a post installation test but not a pre installation testSection C
22 Testing Air-Testable Tanks Connect a “Tank Test Manifold” to a primary fittingUse pressure gauge of 15 psig or less (max ¼ psig increments)Use pressure relief device to ensure tank pressure does not exceed 5psig (3 psig for 12’ tanks)Tank Test Manifold(Contractor Supplied)Section C
23 Testing Air-Testable Tanks Soap entire tank and inspect for air bubblesSoap all fittings and manwaysContact CSI Field service immediately in the unlikely event a leak is discoveredSection C
24 Pre installation air/soap Testing Procedures Section D
25 Section D1 - Testing Single-Wall Tanks Steps 1-3: follow Installation InstructionsPressurize tank to 5 psig maximum (3 psig for 12’ tanks).Monitor the pressure readings for 30 minutes for any loss in pressure from the initial reading which may indicate a leak.While under pressure, cover tank outer surface including fittings and manways, with soap solution and inspect.Steps 7-10 : follow Installation Instructions
32 Geotextile Fabric (Filter Fabric) Geotextile fabric is required between backfill and native soils for certain installations such as unstable soils, swampy areas and landfills to prevent backfill from migrating and thereby undermining support of the tank, piping or paving.
33 Geotextile Fabric (Filter Fabric) Geotextile fabric should be used in tidal conditions, area of frequently changing ground water, and unstable soilsDo not use plastic, or any other material that may tear or degrade, as a replacement for geotextile fabric
35 Burial Depth and CoverMinimum bedding under tank is 12” (18” in a wet hole) and a maximum of 24”Maximum standard burial depth is 7’Traffic pad must extend at least 12” beyond tank perimeterMinimum burial depth will vary according to job site conditions:Traffic loadMechanical anchoringNumber of tank sumps/risers
36 Burial Depth – No Traffic Load For No Traffic Loads:4’-10’ tanks need a minimum of 24” backfill or 12” backfill and 4” reinforced concrete12’ tanks need 42” backfill or 38” backfill and 4” reinforced concrete
37 Burial Depth – Traffic Load For Traffic Loads:4’-10’ tanks need a minimum of 36” backfill or 18” backfill and 6” reinforced concrete12’ tanks need 48” backfill or 36” backfill and 6” reinforced concrete
39 Tank Anchoring The three common methods are: Deadmen Anchors Concrete Anchor PadOverburden (no mechanical anchoring)For minimum burial depths refer to the Anchoring Chart in Installation Instructions INST 6001 (Appendix A)
40 Mechanical Tank Anchoring If water can enter the tank excavation, CSI recommends mechanical anchoringUse only CSI fiberglass anchor strapsDeadmen or concrete anchor pads may be usedAfter installation, all exposed metal should be coated or galvanized to protect against corrosion
41 Tank Anchoring – Anchor Straps For All Mechanical Anchoring:Use correct length anchor straps for each diameter tankAnchor points must be aligned with designated anchor ribs ►◄ (±1"). Do not use straps between ribs except on 4' tanksUse one anchor point per strap end
42 Tank Anchoring – Anchor Straps Anchor straps on fiberglass tanks:Must have anchor points at the bottom of the hole aligned within 1” of the designated ribShould be tightened with turnbuckles (seen here) or come-alongs to give a “snug” fitAre available in a convenient man-out-of-hole split strap option
43 Tank Anchoring - Deadmen Using Deadmen:Ensure lifting equipment is rated to handle the full load before liftingUse a minimum of 2 equally spaced anchor points
44 Tank Anchoring - Deadmen Lay the deadmen in the excavation parallel to the tank and outside of the tank shadowEach tank requires its own deadman on both sides, or if one deadman is used between adjacent tanks, it must be doubled in widthPlace multiple deadmen, in contact, end to endStandard installation is bottom of deadman even with bottom of tank
45 Tank Anchoring – Anchor Pad Using Anchor Pad:As a minimum the anchor pad for stable excavations must be at least 8" thick, with #6 rebar on 12" centers each wayWhen a concrete anchor pad is used the tank and pad must be separated by at least 12” of approved pea gravel or crushed stone backfillEmbedded anchor points must be designed for the working loads in Section H of the Installation Instructions
47 Vertical Diameter Measurements Excessive Deflection (loss of vertical diameter) of any installed tank can create stress on the tankThe major cause of deflection is the loss of tank support because of improper backfill material or installation methodCompare all deflection measurements to the limits established by CSI on the Tank Installation ChecklistThere are 5 total vertical diameter measurementsRefer to Section I – Installation for detailed measurements
48 Vertical Diameter Measurements “First Vertical Diameter Measurement”After placement of tank on backfill bedAll measurements are recorded on the Tank Installation Checklist
49 Vertical Diameter Measurements “Second Vertical Diameter Measurement”When mechanical anchoring is completed(only applicable if mechanical anchoring is used)All measurements are recorded on the Tank Installation Checklist
50 Vertical Diameter Measurements “Third Vertical Diameter Measurement”After backfill is to tank topAll measurements are recorded on the Tank Installation Checklist
51 Vertical Diameter Measurements “Fourth Vertical Diameter Measurement”When backfill is to subgrade, but BEFORE the concrete padAll measurements are recorded on the Tank Installation Checklist
52 Final Tank Deflection Measurement “Fifth Vertical Diameter Measurement”When backfill is to subgrade, but BEFORE the concrete padComplete Tank Installation Checklist
54 Installation Procedures Basic Installation Steps Overview:Review all instructions and make sure you are compliant with proper proceduresAdd Backfill BedPlace Tanks in excavation on Backfill bedTake First Vertical Diameter MeasurementComplete Mechanical AnchoringTake Second Vertical Diameter MeasurementBackfill Tank to tank topTake Third Vertical Diameter MeasurementBackfill to subgradeTake Fourth and Fifth Vertical Diameter Measurements
55 Installation Procedure – DRY HOLE Minimum initial tank bed of 12” of approved backfillProbe first 12” lift under tank between 5 and 7 o’clock positions of tankProbe second 12” lift (most critical area)
56 Installation Procedure – DRY HOLE Use long-handled probes to eliminate voids (keep employees out of the hole)
57 Installation Procedure – DRY HOLE Ballast tank only AFTER backfill is to top of tankIn stable soil conditions the recommended clearance for tanks 4’-10’ in diameter is 18” between adjacent tanks
58 Installation Procedure – WET HOLE De-water hole as much as possiblePlace 18”- 24” backfill bed under tankUse only enough water ballast in tank to sink tankKeep tank vented to prevent pressurizationBallast level inside tank should not be more than 12” above ground water level outside of tank
59 Installation Procedure – WET HOLE Fiberglass tanks installed in unstable soils such as peat, swamp or landfill type must have a hole size big enough to allow a minimum space equal to half the tank diameter from the ends and sides of the tank to the excavation walls.
60 Internal Piping Clearances Internal piping should be a minimum 4” from bottom of tank (6” min. 12’ tanks)
61 Manways – Manway Extensions DO NOT enter tank!!DO NOT exceed 50 ft-lbs when tightening manway bolts
63 Typical Water Tank Testing All potable water tanks must be air/soap tested in accordance with Section D-1 of the Tank Installation Instructions INST 6001.Most non-potable tanks are not air testable and thus require a different test.
64 Typical Water Tank Testing For this training we will focus on Section D-10, referencing from the Tank Installation Instructions booklet INST 6001D-10: WATER TEST FOR A NON AIR-TESTABLE TANK (NON PETROLEUM TANKS)
65 D-10 Water Test Procedures Comply with the requirements of Section C.Tanks may only be water tested if the backfill is at tank top (see Figure D10-1).
66 D-10 Water Test Procedures Expose tank penetrations on tank top by temporarily removing backfill.So water does not exit the inlet/outlet pipe, install a turned up elbow or plug.Completely fill the tank with water to a level 2" into the access collar(s).Fill tank with water to a level 2” into the access collar(s)Flowtite® Water Tank
67 D-10 Water Test Procedures Wait at least 30 minutes, if the water level in the collar does not drop more than ¼", the tank is considered acceptable and leak free.If the level drops more than the ¼", ensure that inlet and outlet pipe caps or plugs and collars are not leaking, then refill the tank and retest.After the tank is proven to be watertight, remove the water in the tank to below the pipe invert.Access collarFlowtite® Water Tank
69 Critical Installation Steps Review Use proper backfill materialProvide a proper bed for the tankEvaluate if the tank will need to be anchoredProperly place and probe the first two 12” lifts of backfill under the haunches of the tankDO NOT ballast the tank until backfill is to the top of the tankMeasure and Record all Vertical Diameter MeasurementsTest the tank using the Water Test Section D-10
72 Adhesive Mixing Instructions INST 6056 – published instructionsKIT AD – Adhesive mixing instructions for use with adhesive channelPVC or FRP risers
73 Watertight Riser Installation Dry fit Riser Components then sand and clean the mating surfacesINST 6056
74 Watertight Riser Installation Thoroughly mix resin and catalystINST 6056
75 Watertight Riser Installation Fill channel with adhesive then set riser in channelINST 6056
76 Watertight Riser Installation Wipe excess adhesive and smooth the adhesive using the supplied putty knife. Finally, allow adhesive to cure for 24 hoursINST 6056
77 Layup Kit (Kit LK) - Instructions Optional Kit used in lieu of Kit ADThoroughly mix resin and catalyst following the mixing instructions in the layup kit.Resin coat previously ground mating surfaces.Apply 3 layers of glass layup saturated with resin 360° around sump, centered on joint. All layup joints must overlap a minimum of 1" but not exceed 2” in circumferential direction.Roll layup until all air is removed.Allow layup to cure at least 24 hours without moving the joined parts.
78 For Additional Questions Call: Tank Technical Support (936) 756-7731