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1.1 REMOVAL Of EXISTING TANKS AND PIPING SYSTEMS 1.2 EXCAVATION AND BACKPILL OF UNDERGROUND TANKS (CONT'D) 2.2 HANDLING OF FRP TANKS (CONT D) -
<br /> A. Contractor, as part of the contract, will exerute and comply C. Product linea shell be pitched 1/4" per Lt. to pump E. DAMAGE: I1 tank is damaged, do. not attempt repairs. company
<br /> with. the Ovnar'e, herein alter referred to as Company, Tank blocks, Minimum pitch is 1/8" per ft. Rep. is to be notified and will determine the course o, action
<br /> that Will be followed.
<br /> Disposal procedures and with governmental authorities having d. Vent and vapor return lines shall be pitched 1/4" per
<br /> jurisdiction over such work. it F. SETTING: Set tanks oil prepared bed with a slope downward
<br /> 1. Company Rep. will be responsible for removal of alltoward the fill end of the tank. A slope of 1" difference
<br /> reusable product, a. 1/2" pipe diameter separation at cross-overs. between the two extreme openings of the tank is desired. The
<br /> acceptable range of slope is 4" maximum and 2" minimum with
<br /> 2. Drain all product linea. f. The Contractor is responsible for any design, the fill and lower than remote pump end of the tank. Tanks
<br /> materials, equipment, permits, etc., for shoring or that exceed the acceptaoleslope or that elope downward to the
<br /> - For pressure (STP) system gravity drain into tank by aide eloping a hale. remote pump end are improperly set and must be raset.
<br /> opening check valva at STP and the test port in sheer
<br /> valve. Disconnect line at BIP union to drain/Plush 1.3 FILL AND BACKFILL C. INSTALLATION WITH APPROVED MATERIALS: Place a 12" lift of
<br /> remaining product into an appropriate container, backfillevenly around the tanks. Push backfill completely
<br /> A. All Lill material shall be o7 a granular nature, free from underneath the tankbetweenthe ribs and under the end caps.
<br /> vegetation and extraneous material. Company Rep. shall This is the most important part of the backfill process.
<br /> For auction pump system, disconnect from tank (low 9
<br /> point) and gravity drain into appropriate container. -inspect and approve the material before St is spread. Spread Procedure can be done from Sank or adjacent tank top. If a
<br /> '- material in lilts not to exceed 12 inches and tamp thoroughly. man will be in the hole 1:0 'work" the backfill, hole must be
<br /> CAUTION: DO NOT INTRODUCE COMPRESSED AIR INTO LINES ` when required by local code, General Contractor shall provide shored or side eloped anPrescribedby current OSHA !
<br /> FOR PURPOSE OF EVACUATING PRODUCT FROM a Compaction test for certification of fill. regulations.
<br /> i
<br /> LINES. I
<br /> B. APPROVED BACKFILL MATERIALS: 1. Place second 12 lift or backfill evenly around the
<br /> 1. Remove all flammable liquid from tank bottoms by using a - tanks. Again, reVeat, the "working" or backfill between
<br /> hand pump to evacuate the remaining few inches. Dispose 1. PEA GRAVEL. A clean, naturally rounded aggregate with a the ribs and under the end caps. Add backfill evenly
<br /> of tank bottom liquid remains per applicable regulations. 1/8" minimum and a 0/4" maximum diameter. Up to 32 of around the tanks up to 'he tops of the tanks,
<br /> the particles may pane through a f8 sieve. Y
<br /> 4. Dig downto top of tank and nanous Ilii (drab tube) , STP 2. Backfill t0 uLg ra..i� after piping and testing 1.
<br /> and all piping connection. to the tank. 2. STONE OR'GRAVEL CRUSHINGS. Washed material, with
<br /> completed _
<br /> particle size between 1/8" and 1/2". Up to 3% of the #-
<br /> 5. Temporarily plug all tank openings, complete excavation particles may pass through a 48 slave. H. INSTALLATION WISH Al rFRNATE MATERIALS: All alternate materials
<br /> and remove the tank; placing it in a secure location. must be compacted to 90t relative density (;.5TH D-1557-70) .
<br /> Block the tank to prevent mov...Or. USE EXTREME CAUTION 1. Approved materials must be dry, free of ice and snow, and Contractor is to furnishwith certification of compaction from f
<br /> DURING REMOVAL OPERATION. most ASTM C-11, Para.9.1 for quality and soundness. a registered soil engineer: :
<br /> a. Remove flammable vapors. C. ALTERNATE BACKFILL MATERIALS (Defined as any material not 1. Company Rep I. r+=Iensible for providing the exact
<br /> ,meeting above requirements for approved materials) : installatiT s > f�cation for alternate materials.
<br /> Preferred method for conditioning tank. Ver ,
<br /> 'z .. Approval of Company Rep. is required prior to use of such 2.3 TESTING OF TANKS )
<br /> Make vapors inert by adding 15 pound. of dry ice (carbon : . material. In certain instances, the approval of the tank (Notify the Company R.,_ who MST observe all tests, at least k
<br /> dioxide) per 1000 gallons of to
<br /> capacity. N. manufacturer may be required to preserve the tank 24 hours in ad ally test$,) ilt
<br /> 3warranty. Company shall obtain such approval.
<br /> The vapors in the tank may be made inert by adding solid Y A. The Contractor is resp risible for all labor, material and
<br /> carbon dioxide (dry ice) in the amount of 15 pounds per j,° 2. Alternate materials, it used, must be dry and free of ice ego iPment necessary tc yonduct the following testa:
<br /> 1000 galloon of tank capacity. The dry ice should be `i §§ and snow. The tank hole sides must be shored or Aide !
<br /> crushed and distributed evenly over the greatest possible Sp '' sloped to pe:rnit entry for compaction and testing. After-Installati, nPre-installationr ere eye Test, Air
<br /> area to secure rapid evaporation. Avoid skin contact 'urs Test, Air or Hydrostatic
<br /> with dry ice because it may produce burns. AS the dry A A 1 ING OP TANKS Internal Mea sur msec
<br /> ice vaporizes, flammable vapors will flow out of the tank
<br /> and may surround the area. Henze, observe all normal minimum bed of backfill material is to be placed in the 1'. ACCE PTA 9lF soAPs, - ^>capi ng" the tank and fittings
<br /> 4 p BFO
<br /> safety precautions regarding flammable vapors, Make sure "S- �A 0ol smoothed and "Toped to allow a tank elope of 1" In 10' during th test .A..to be done using a small garden-type i
<br /> that all eL the dry ice bars vaso rized. do nward toward the fill and prior to setting the tank. hand-pressurize . pray unit. The test soap shall be a
<br /> high foaming -Is'ap" that bubbles easily if in contact
<br /> 1`- A'rv4C IM d ;', f ,L tl _„ - with an air leaK in the tank but won't bubble due to
<br /> s .d" r
<br /> , r
<br /> soap. are: from t''s pressure opal Scat or. Acceptable
<br /> - -YSTLMS (CONT'0) soaps are: j -
<br /> l.l REMOVAL EXISTING TANFS AtlD PIPING `• "�'.
<br /> :, i BEDDING OF TANKS (CONT'0) -
<br /> i. After the tank has been freed of vapors and prior to ` � .'. 1. When specified, the down "109." shall to installed prior
<br /> moving from the site, plug or cap all hole.. ase to be bed material. Caution - Do not plcco FRP tanks on ` a . l TESTING oe TANK, (<our'�)
<br /> threaded (boiler) plugs to plug Any corrosion leak holes. I1. concrete slabs, timbers, beams, cradles or grout the
<br /> one Cank fitting plug should have a 1/8-inch Vent hole to tanks in wet cement. The tank, whether tied down or not, "seam Test Concentrate"-
<br /> prevent the tank from being subjected to or. excessive ,, most never be "lett on the bed without a backfill to the "Amway Lou High 51ap"
<br /> pressure differential caused by extreme temperature top of the tank if there is any chance cf water, 12" or "/7006 Southbend leak Detector" _ .A
<br /> Changes. s� sora above the tank bottom, in the hole. or approved egual�
<br /> S. No fiberglass or steal tank shall be reused. Render tank +1. 5 OBSERVATION WELTS 2. PRE-1N STA LIATION REJSI RE TEST, AIR: Extreme care !s Co -
<br /> useless after removing
<br /> from site. q" - -
<br /> i be used around a]an ear the-pr, sur[zed tank.
<br /> 9. An an added precaution, regardless of condition, the tank A, if shown on drawings, two slotted observation. wells in
<br /> ti
<br /> shall be labeled precaution,
<br /> to the Lill opening in legible oppon its corners of the tank hole, are to be installed: Sample a. Tanks are tctestedt0 4 paig minimum (5 psig
<br /> p g g wells ata to be positioned in the hole prior to placing Lhe maximwv) tef e,being installed in the tank hole.lettere a. follows. -z bedding material and supported to remain vertical during The enc3re tk and fittings are to be soap tested. t
<br /> backfill. Bottom of observation well is to be 12" minimum " Tank may be rolled up to 90 degrees on a smooth clean
<br /> "TANK HAS CONTAINED FLAMMABLE LIQUIDS below the bottom of tanks. Top of pipe to terminate in 12" y Company p.
<br /> NOT GAS-FREE diameter tlllbox. Slottatl observation wells .hall ba rounded surface aurin this test. The Com an Re is to
<br /> NOT SUITABLE FOR FOOD OR DRINKING WATER" D witness and {.cord the re"lts of this test.
<br /> d t.: ( . by General Contractor, unless otherwise instructed by Company
<br /> g' NOT;: Prior to junking gasoline tanks, the latest r` Rep. In. A pressure r�lisE system set at 5 paig 1s to be
<br /> applicable waste disposal regulations should be !" installed in ch¢ vent opening.
<br /> 2� checked to determine if spec nal attention or 1 6TANK HOLE LINER y "
<br /> preparation is required. - provide a Filter Fabric Tank Hole Liner -' ' ^' c. The pressure'application system is to have two
<br /> A. Contractor is to
<br /> p pressure gou3es (0 io 30 paig maximum) to the system,
<br /> 10. Remove tanks, product and vent piping In excavation from when: both in good condition and having been tasted and
<br /> Site at'the earliest time possible. DO NOT DELAY % calibrated within a three-month period prion to the
<br /> L Tank hole Ss vnstabis Boil, ae defined above, or tank test (� py of the test and calibration data to
<br /> DISPOSAL: Permanently abandon remaining product lfoae .J ' be furnished to the Company Rep. ) . Caution: Be sure }
<br /> (from pump islands to tank area) by tilling lines with a ` ( ? 2. Specl q)ed!ip Company Rep:. - The entire tank hole (sides - to relieve *eke-pressure prior to moving the tank or
<br /> concrete slurry, or Plush with eater) and cap If E Sc with 2 -
<br /> permitted by local regulations, s. _ removing any of the fittings.
<br /> n "( 1. Bedding matwrial, te-down "1 s" and simple
<br /> and bgtad, shall be coveted. La the fabric
<br /> [pot cedmum overlap,. -determine the course of action that will be followed.
<br /> r
<br /> - ' il. For in ground waste oil tank, arrange for disposal of .^ f' g � d. . Do not install a tank which shows an evidence of
<br /> remaining liquid contents with authorized disposal � wells are to leaking. The Company Rep. is to be notified and will ;
<br /> me vi.e. (Effective November 1, 1985, waste oil under be placed oo the cop of the filter folded
<br /> fabric. Excess fabric
<br /> Federal Regulations will be classified as a hazardous at the top w[ the Role should be folded owe[ the backfill
<br /> waste) , material at subgrada level. 1. AFTER INSTALLATION PRESSURE TEST, AIR near
<br /> HYDROSTATIC:
<br /> ''.Extrema care is to be used around and near the
<br /> - Uncover tank and disconnect attached piping. B. APPROVED FILTER FABRIC MATERIAL: 'press rized tank'. -
<br /> .Dupont "Typar" Spunbound Polypropylene - Style 3401 ` a. Tanks are c be tested to 4 pslg minimum (5 paig
<br /> Plug tank openings and complete excavation.
<br /> Phillipe Fibers Corp. "Supace Fabric maximum) ager,. being installed in the tank hole and
<br /> r� "Monsanto - "Bldlm" C22 the backfil C`material is to the tap of the tanks.
<br /> Ro - Remove tank and secure at grade. or approved equals
<br /> All risers, bushings, plugs, and pipe connections are
<br /> - Mark tank an in Item 9 above and executesale/dlnponel t ) ± OAIAST the test.Lto be installed. and tight prior to the application of
<br /> agreement with Contractor prior to. constructlon. Tfe Company Rep. is to witness and record
<br /> A `'Water is to be used as ballast under all conditions where the Yesultsof this test.
<br /> Assure tank disposal is in accordance with governing ballast is required.
<br /> regulations. - i E. A stellula :at he(vent
<br /> pi set at 5 trea is Co be
<br /> tl ;{ 1. DRY HOLE CONDITION: .Tanks, with backfill to to of tanks, installed r the vent piping downstream bf the swing
<br /> 12. Company Rep. and Contractor shall inspect open D joint t th tank.
<br /> excavation for evidence of product leakage. oust b. ballasted if tears is any chance that surface or
<br /> eubeurface water will enter the tank hale to a depth of c. The press., '.application system is to be the same as - `y
<br /> - 21" or greater above the bottom of the tanks. Caution - specified i the pre-installation pressure test. `
<br /> - Do not ballast tanks until backfill is to top of tanks.
<br /> d. All tank ti ings and pipe connections are to be
<br /> thoroughly $ped and ecMitec%ea'Por leaks. Hold the
<br /> 1.1 REMOVAL OF EXISTING TANKS AND PIPING SYSTEMS (CONT'D) test for 30 int At ,, ` Cheek the tank for damage
<br /> during dente Satipd!. ' Ca.tion: Be soca to relieve the
<br /> 11. TAKE SOIL SAMPLES FROM EACH CORNER AND FROM THE X:DDLE OF i UA LIAST (CONT'D) pressure pn r�,$.d`removinq any fittings.
<br /> THE TANK EXCAVATION AFTER THE EXISTING TANKS HAVF BEEN 2. WET HOLE CONDITION: Attempt to pump water from the tank -
<br /> ` REMOVED AND SUBMIT TO A QUALIFIED LABORATORY FOR ANALYSIS 'e ) hole to n..atintain a "Dry Hole Condition". If unable to "FOR «.wL.'*+c l(YDROCAABON 1S6 E 0*) CONTENT. A COPY OP2.] TESTING OF TANKS
<br /> obtain a ,!'D)ry Hole Condition", Company Rep. is to Be
<br /> THE SOIL ANALYSIS, INCLUDING LOCATION OF SAMPLES, notified sold Will determine the course of action to be "
<br /> SAMPLING METHODS, TEST PROCEDURES AND TEST RESULTS LTB SNA LL followed. Instal': filter. fabric, tie-down "logs" and - s. if the tanks go, conduct
<br /> conduct a Petro Tire
<br /> BE FURNISHED TO THE FIRE PREVENTION BUREAU AND TO THE v* ,, -' bedding' a$ sp¢cici ed elsewhere. Set tank in hole, Hydroa ratio st (instead of an a.r test) on the tank
<br /> .REGIONAL WATER QUALITY CONTROL BOARD. SOIL SAMPLES SMALL, o . partially fFlll with water until SL sinks firmly on the and ftttiid"g`s(l t
<br /> BE TAKEN BY AN INDEPENDENT Oil FIFO TECHNICIAN.ZCZAN. (SEE .PAR a, 1) ' 1bad. Use only enough water to ballast tcnk uni'1 -
<br /> : ✓ -i f. No tank that shows any evidence of a leak 1. to be
<br /> ` g backfill is; to top of tank. After backfill to top of - -
<br /> 1.2 EXCAVATION AND BACKFILL OF UNDERGROUND TANKS ! tank, till tank with water until completion of kept in the system. Any damage incurred to the tank
<br /> RF installatlmn. Caution - Ballast level must never exceed during the ,Installation will be the Contractor', j
<br /> A. LCAVATIONS: Excavate only to the depths required by the " Water or bmckflll level in the Role during installation. responsibility. The Company Rep. Is to be notified
<br /> nor {
<br /> plana, nas instructed by Company Rep. If unexpected water n
<br /> condition or rock is encountared, immediately contact the Do not remove ballast until tank Slab has been poured. of any damage and will determine the course of action
<br /> to de follcvell. I
<br /> Company Rep, for instruc[lons before proceeding inq with the (DO NOT SE1f REMOVED
<br /> FROM PUMP MOTOR VNTIL BALLAST NATER A
<br /> HAS BEEN REzHOVED FROM TAN X) . 4. Ire to li MEASUREMENTS) internal he remote
<br /> measurements
<br /> openings,excavation.
<br /> 1. TANK HOLE 9I2E IN STABLE SOIL: Size excavation perimeter LA ° .TANK HOLD-DOWNS (Tie Downs)
<br /> 1 are every
<br /> be taken k. the [111 and the remote pump openings,
<br /> to allow 24- minimus between tanks and 24" minimum on every FRP tank. .. The Contractor, witnessed by the
<br /> Company Rep. , la responsible .for making and recording on
<br /> between tank sides and and caps and the wall of the tank A. Install hold-down 'loge" at all locations with known water a form provided'by.the Company, the required
<br /> hole.
<br /> conditions and at chose locations where eater Se found during measurements. The .first set of measurements is to be
<br /> tank installations. Refer to "Tank Hold-Down" fabrication and
<br /> 2. TANK HOLE SIZE IN UNSTABLE SOIL: Unstable soil is defined installation requirements of these specifications. - taken prior to placing any backfill around the tank. Threquirements
<br /> second Set of measurementa le to be taken when the
<br /> as having lase than ]SO lbs./aq.t[. cohesion, an
<br /> calculated from an unconfined compression Leet, or soils 2:1 VN DERG ROUND TAN1K5 backfill has reached subgrade (prior to pouring the
<br /> concrete slab) . ,
<br /> with an ultimate bearing capacity of less than 1,500 A. MATERIALS: Fibem lase reinforced plastic (FRP) storage tanks
<br /> lbs./sq.tt. Ecorse sand, muck, bog, pent, swamp or g P ) g {. a. If the difference between any 2 sats of readings is
<br /> landfill where soil is soft are generally considered as supplied by Ithe Owner are to be installed by Contractor in
<br /> , accordance with the plans and specifications and greater than 1-1/4" stop the job. The Company Rep. :
<br /> unstable soils. f manufacturer's recommendations. is to b. notified and will determine the course of
<br /> a. Size excavation perimeter to alloy 24" minimum `z a , •% action that"w 111 be followed.
<br /> e ra'.
<br /> between tanks and a minimum of half the tank diameter 3':2 HANDLING NG OF PAP TANKS !
<br /> �` 2•.4 DOUBLE WALL FRP TANX3 NSTALWTION i
<br /> between the tank sides/end caps and the wall of the A. LIFTING 6 MOVING: When lifting or moving an FRP tank, always
<br /> tank hole. A. GENERAL REQUIREMENTS: ' For a double wall tank, all the
<br /> use properly gr,ead equipment and lift by lifting lug(s)ba On J
<br /> b. Filter fabric will be used to line tank hole in - : large tanks, greater teat B' diameter, use a spreader bar to - followspecifed, ions for onsingle wall tank ntsinstallationb aha. be
<br /> unstable soil. ensure a lift single of at least 45 degrees at each lifting followed, in addition to,the requirements listed below.
<br /> lug' S. HANDLING: The Contractor is responsible for off-loading the
<br /> c. Permanent shoring may be used to stabilize the walla tanks from the deliver vehicle. A crane or backhoe of "•I m [ w ' S ' C " 4 OAT[ BY U'S M bll ©il
<br /> of the tank hole, at the discretion of the Contractor B. 1. Never roll or use cables or chains around an FRP tank. y
<br /> Set on smooth ground, free of rocks and foreign objects. sufficient lifting capacity must be used. 'the weight of the
<br /> and/or Company Rep. I1 permanent shoring is used,
<br /> be rolled Up to 90 degrees on a double.wall FRP tank is approximately 5000-6000 lbs. WESTERN RE 0'.O!!
<br /> follow "Stable Soil" size Criteria. Refer to Exception: Tank can +
<br /> "Alternate, Backfill Materials" below. smooth cleian surface when performing the "pre-installa-
<br /> tion" pres,aure test. C. 4 FRE-INSTALLATION PRESSURE TEST, AIR: LOS AN OELQ$ (fJGIN E`QRINQ CENrEM 4 .i
<br /> 1. DEPTH OF TANK HOLE+ Contractor is responsible for - 1. PRIMARY (INNER)' TANK TEST: Tighten tank fittings.
<br /> 612 $Q Dt OY/��l $T.. t.A„ (..A 9Cx0']
<br /> considerin the len th r.. CHOCKING: Tan a era me be coot ked in accordance with 9 g
<br /> eetab11eh1ng the tank hole depth, 9 9 � Locate a -ensure gauge in the vent monitor fitting in
<br /> of piping rune, to the pump blocks and vent risers, pipe If windy can's recommendation exist ion until ready for installation. da 9 9 / u
<br /> burial depth, yard slope and the following criteria: If windy conditions lone exiem or are expected, anchor tanks using the secondary (outer) tank. Locate a second pressure ,,,mm OTRO1 9 m
<br /> (Measure at the Remote Pump opening) . '_ minlmvm 1/2" nylon or hemp rope over each tank and nature to gauge re a fitting in the mfitty and- connect
<br /> ur the air r�G Iy V
<br /> G� `' stakes of adequate airs to prevent movement of the tanks. primary home to thio same fitting. psi,
<br /> the
<br /> a. A minimum of 12" of backfill material Se required a Li Monitor (inneres tank to minimum 4 psi, max lour 5 pal. 1 /'�
<br /> under the tanks. `D. OPENINGS: All tanks are shipped with dust covers in each Monitor the pressure re gauges a minimum of 1/2 Tour. SPEtClAICATIONS ),
<br /> opening. Dust covers are to remain in each opening until 'f
<br /> b. The minimum depth of cover for PAP tanks is 4'0" and l,• ready for the pre-installation pressure test. Replace dust 2. SECONDARY (OUTER) TANK TEST: Leave the pressure , the
<br /> p r rima tank. Vain a flexible air hose manifold, Cell'.m;;, NJMBEA nE1. t
<br /> the maximum Se 7`O" not to be exceeded y covers atter this teat has been completed. primary 4 I {
<br /> l ) • connect the air tank.
<br /> This
<br /> hose from the primary tank to OAA w.. p
<br /> the secondary to took. This mans Cold hose should be �O app
<br /> contacted to the vent/monitor
<br /> aug . Close
<br /> that dole not
<br /> �� q
<br /> :-f Cx CD
<br /> - - contain the air pressure gauge. Close Lha valva to the
<br /> primary tank and disconnect the air supply. aPressurize
<br /> manifold
<br /> the secondary tank Ey opening the valva !n the manifold S a [
<br /> "y system. Soap the entire tank and all fittings. -
<br /> MJM ,w 3-2520
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