|
2. BALLAST
<br />Place tanks in the hole, adding only enough ballast to
<br />sink them. Ballast level in tanks must never exceed water
<br />level in hole during installation. While adding ballast, only
<br />use lifting cables to keep tanks in position. Tanks should
<br />be free to roll slightly. The lifting cables and toglines
<br />must be carefully tended.
<br />Caution: Do not place tanks on timbers, beams or cradles
<br />3. LEVEL TANKS
<br />While leveling tanks, insure that minimum spacing between
<br />tanks is maintained. When anchoring, place straps over
<br />tanks and follow procedures in Section XIV -8.
<br />4. BACKFILLING
<br />Distribute backfill evenly around tanks and continue
<br />procedures outlined for dry hole installation.
<br />XIV -8 ANCHORING
<br />Tanks must be anchored where high water tables exist, surface
<br />water could flow into hole, or other water conditions could
<br />exist in a dryhoe. All 4' & 70' tanks must be anchored
<br />ed
<br />without exception, regardless of groundwater conditions.
<br />1. HOLD DOWN STRAPS
<br />Use preformed hold—down straps furnished only by original
<br />tank fabricator at designated strap locations marked on tanks.
<br />Steel tank straps are furnished by tank fabricator with o
<br />construction felt which MUST be placed between the straps
<br />and the tank shell. Anchor straps must align with headman
<br />anchor points +/— 1". Do not place straps or cable anywhere
<br />else on tank shells.
<br />Attach hold—down straps to anchor paints with 1/2" diameter
<br />7 x 19 plow steel wire rope with blue steel center (no
<br />fiber core) loops per D-97008 using three cable clamps and
<br />heavy duty cable thimbles. All straps should be tightened
<br />with turnbuckles to give a snug fit of strap to tank rib.
<br />Turnbuckle diameter to be 1-1/4" hook type or 3/4" eye
<br />type. 1" clevis—clevis turnbuckles may be used indigo of cables.
<br />2. ANCHOR POINTS
<br />Anchor points to be fabricated from round steel bar stock
<br />of anchor bolt grade steel, formed as shown on drawing
<br />D-97008. Use 1" diameter bar a 2—tank anchor and 3/4"
<br />diameter bar for a 1—tank anchor.
<br />3. DEADMAN ANCHORS
<br />The weight of backfill above a deadmon on each side of a
<br />tank to which they are anchored provides the additional
<br />hold down force required to prevent float—out under the
<br />hold—down force required to prevent float—out under the
<br />most adverse conditions. Deadman may be fabricated in 2
<br />pieces placed end—to—end without gaps (minimum 2 straps
<br />per deadman) where the total length is at least as long as
<br />the tank itself. See D-97008 for details.
<br />Deadmen should be Installed along the center line of
<br />anchor points, taking care to have good cross alignment
<br />+/— 1" with adjacent deadman anchors. The two outer anchor
<br />points should be used for lowering deadmen into the tank
<br />hole. If the contractor elects to cast deadmen in place
<br />in the hole, the some anchors should be used with equal
<br />reinforcement.
<br />Any other substitute method
<br />will require
<br />equal horizontal
<br />area, anchor
<br />points of
<br />equal
<br />strength to
<br />the wire rope
<br />required, and
<br />approval
<br />of the
<br />Shell engineer.
<br />Diameter
<br />4. CHANCE ANCHORS
<br />Chance anchors will not be permitted under any
<br />circumstances.
<br />5. ALL ANCHOR METHODS (Minimums per anchor point)
<br />TANK DIAMETER
<br />XIV -9 SOIL STABILIZATION/FILTER FABRIC EXCAVATION LINER
<br />Soil stabilization/filter fabric as specified below will be
<br />used to line the bottom and side walls of all excavations for
<br />ALL tanks except those in solid rock. For purposes of this
<br />specification, solid rock will include igneous rocks (granite,
<br />etc), sedimentary rocks (conglomerates, sandstone, shale,
<br />limestone, etc), and metamorphic rocks (gnieses, schists,
<br />etc).
<br />If only a portion of the hole is excavated from solid rock,
<br />then only that portion, which is not, should be lined. (For
<br />instance: If only the bottom foot or so of the excavation Is
<br />in solid rock, then the sidewalls should be draped with the
<br />fabric so as to overlap into the rock area.)
<br />There are several inexpensive inert soil stabilization filter
<br />fabrics available which provide a separation between existing
<br />soil and non—compatible backfills. When this material is used,
<br />the 1/2 tank diameter spacing from ends and sides of tanks to
<br />hole walls is not required.
<br />Filter fabric is generally
<br />6'
<br />(or less)
<br />8'
<br />10'
<br />Wire Rope (Recommend
<br />1,000 yards
<br />and in 12'-7"
<br />and 15'-7"
<br />7 x 19 plow steel)
<br />be laid with
<br />minimum laps
<br />of
<br />Diameter
<br />3/8"
<br />1/2"
<br />1/2"
<br />Tensile Strength
<br />9000
<br />12500
<br />16000
<br />Turnbuckle Diameter
<br />See D-97005 or 0-97009 for a
<br />suggested layout method
<br />of utilizing
<br />Hook Type
<br />3/4"
<br />1-1/4"
<br />1-1{4"
<br />Eye Type
<br />1 /2"
<br />3/4"
<br />1'
<br />XIV -9 SOIL STABILIZATION/FILTER FABRIC EXCAVATION LINER
<br />Soil stabilization/filter fabric as specified below will be
<br />used to line the bottom and side walls of all excavations for
<br />ALL tanks except those in solid rock. For purposes of this
<br />specification, solid rock will include igneous rocks (granite,
<br />etc), sedimentary rocks (conglomerates, sandstone, shale,
<br />limestone, etc), and metamorphic rocks (gnieses, schists,
<br />etc).
<br />If only a portion of the hole is excavated from solid rock,
<br />then only that portion, which is not, should be lined. (For
<br />instance: If only the bottom foot or so of the excavation Is
<br />in solid rock, then the sidewalls should be draped with the
<br />fabric so as to overlap into the rock area.)
<br />There are several inexpensive inert soil stabilization filter
<br />fabrics available which provide a separation between existing
<br />soil and non—compatible backfills. When this material is used,
<br />the 1/2 tank diameter spacing from ends and sides of tanks to
<br />hole walls is not required.
<br />Filter fabric is generally
<br />spunbonded
<br />polypropylene
<br />available in
<br />rolls of 100, 300, and
<br />1,000 yards
<br />and in 12'-7"
<br />and 15'-7"
<br />widths. Material should
<br />be laid with
<br />minimum laps
<br />of
<br />approximately 18" width
<br />so that the
<br />excavation is
<br />completely
<br />lined and overlaying the
<br />top of the
<br />hole perimeter
<br />one to two
<br />feet and pinned in place.
<br />See D-97005 or 0-97009 for a
<br />suggested layout method
<br />of utilizing
<br />15'-7" wide
<br />material.
<br />Acceptable fabrics by brand name:
<br />Du Pont "Typor' Style 3401 — 4 oz/s.y.
<br />Monsanto "Bidim" C-22 — 4 oz/s.y.
<br />Phillips Supoc' Fabric — 4.1 oz/s.y.
<br />Celanese "Mirafi" 140 Fabric — 4.1 oz/s.y.
<br />CONCRETE SLAB ALTERNATE
<br />In situations involving extremely low bearing soil and adverse
<br />water conditions, a concrete slab under the tanks may be used
<br />as on alternate to the filter fabric method. Install
<br />prefabricated reinforced concrete deadmen as outlined in
<br />Section XIV -8. Between the deadmen, under each tank area,
<br />construct a reinforced concrete slab with a minimum thickness
<br />of 6" reinforced with 6" x 6", 6/6 wire mesh.
<br />If contractor elects to cast a single slab, including the tank
<br />anchors, the slab should be deepened to provide the some cross
<br />section area as provided by the deadmen, and install the some
<br />steel reinforcement and anchor points.
<br />If a concrete slab is used under the tanks, the filter fabric
<br />should be used as well to line the walls of the excavated area.
<br />XIV -10 BALLASTING
<br />When ballasting of fiberglass tanks is required, water or
<br />product may be used and ballasting done in strict compliance
<br />with these specifications. Prior to delivery of Shell gasoline,
<br />the following items should be taken into consideration by the
<br />contractor:
<br />Forty—eight hours notice to plant is required for delivery of
<br />product for ballast. Assure proper access to site for delivery
<br />vehicle and advise Shell engineer of hose length requirements
<br />needed to make delivery.
<br />A Shell representative must be on hand to verify and accept
<br />delivery and custody of product for the district. Upon
<br />completion of delivery, contractor and Shell representative
<br />should jointly verify the quantity of product delivered. At
<br />this time, suitable locks will be provided by Shell to secure
<br />fill caps.
<br />XIV -11 CHECK TANK DIAMETER FOR PROPER INSTALLATION
<br />FLAY IT SAFE — CHECK VERTICAL DIAMETER DEFLECTIONS
<br />THROUGHOUT THE ENTIRE INSTALLATION PROCESS
<br />Normal installation with specification pea gravel, and tank
<br />properly bedded, will generally result in a decrease in the
<br />vertical diameter of on 8' diameter tank of approximately
<br />1% (1") at the tank mid—length for fiberglass tanks and
<br />roughly 1/2% (1/2") for jacketed steel tanks at the some
<br />poind. While slightly larger deflections are within the design
<br />tolenonce, the above deflection limits should be considered to
<br />be the maximum acceptable without involvement of the tank
<br />manufacturer's technical staff. Should deflections exceed
<br />these limits, it's an indication of improper backfill/compaction
<br />and it may be necessary to remove and reinstall the tanks.
<br />The peogrovel may contain excessive fines below specification
<br />and some mechanical compaction by vibration may be
<br />required for proper consolidation of the backfill material.
<br />XIV -12 FLOAT OUT
<br />Tanks not anchored (with backfill to top of tanks ready for
<br />piping and fully ballasted with gasoline) con float out should
<br />the tank hole become substantially flooded with surface/ground
<br />water. Anchored tanks, fully ballasted, and backfilled
<br />similarly will not float out due to the weight of backfill on
<br />tank slab or deadmen.
<br />In either case, it is therefore essential that the tank hole
<br />be filled completely with backfill to top of tanks. If not
<br />anchored, a minimum of 24" of additional fill above tanks would
<br />be required to prevent floatation under extreme conditions.
<br />Thus, it's most important that necessary installation and piping
<br />above the tanks be completed as quickly as possible so that this
<br />additional fill con be placed.
<br />XIV -13 TANK TOP PIPING
<br />1. INTERNAL PIPING OR SUBMERGED PUMP
<br />It is recommended that actual clearances from the top of
<br />the tank (pipe connection fittings) to the tank bottom be
<br />measured to insure that adequate clearances are maintained
<br />for submerged pump, fill tube, or any other internal piping
<br />installed.
<br />The pump and attached piping must be free to move with the
<br />tank. Use fill box around fill pipe at grade where
<br />asphalt or concrete pad is used. Do not place brick or
<br />other spacing material on top of tanks.
<br />XIV -14 FILLINJG TANKS
<br />Do not fill tanks until backfill is to top of tank. Never add
<br />product or water for hold down in dry hole conditions until
<br />backfilling Is completed.
<br />EXCEPTION: See Installation Procedure — Wet Hole
<br />15 ADDINJG TANKS TO EXISTING INSTALLATIONS
<br />Tanks can be added to existing installations. It is important
<br />to always remember that all tanks require good foundation
<br />support from surrounding soil and are not self—supporting under
<br />fuel or overburden loads. The following guides are suggestions
<br />to reduce loads from soil or product on uncovered tanks so no
<br />damage will occur. Final selection of an installation method is
<br />the responsibility of the Shell engineer depending on local site
<br />conditions. See plot plan and addenda,
<br />ISOLATED BURY (PREFERRED)
<br />Install tanks in a separate hole that is a minimum of 5'
<br />from edge of original tank installation hole. It is
<br />critical that undisturbed soil between the new excavation
<br />and the original hole be maintained. Keep surface loads off
<br />existing tanks.
<br />2. BURY IN SAME HOLE (ALTERNATE)
<br />A.
<br />Lower product level in existing tanks to less than
<br />1/3 tank capacity,
<br />B.
<br />Remove surface pod, if one exists, to reduce overburden
<br />loads and backfill levels.
<br />C.
<br />Excavate for new tanks, leaving as much backfill as
<br />possible around existing tanks.
<br />D.
<br />During installation, existing tanks must not be
<br />Pipe Length/Degree of Bend (Ft)
<br />allowed to move, Shoring and sheeting may be
<br />1'
<br />required to retain backfill_
<br />E.
<br />Install new tanks as described earlier in these
<br />instructions, leaving a minimum of 24" between new
<br />22-1/2'
<br />tanks and existing tanks.
<br />F.
<br />If backfill material other than pea grovel, stone, or
<br />grovel crushings was used for existing tanks, an inert
<br />filter fabric should be installed between ofd and new
<br />MIN.
<br />backfill to prevent any migration into new granular
<br />MAX.
<br />backfill which could lead to tank failure.
<br />XIV -16 PERMANENT PIPE SUMPS
<br />At the discretion of the Shell engineer, tank hole observation
<br />sumps may be installed per Shell Installation drawings. These
<br />Pipe sumps will consists of three (3) 4" slotted PVC pipes and
<br />one (1) 8" slotted PVC pipe. Specifications for the pipe sumps
<br />are indicated on the installation drawings. Sumps should be placed
<br />in the tank hole before any pea gravel is installed so that the
<br />bottom is resting on the filter fabric excavation liner. The
<br />sumps and a water pump can very effectively be used to control
<br />any water entering the hole during construction.
<br />The Shell engineer can furnish a list of national suppliers
<br />for machine slotted (.020") pipe. Solid PVC pipe can also be
<br />purchased locally and perforated either in the contractor's shop
<br />or at the job site.
<br />Perforated pipe should be wrapped with filter fabric or double
<br />wrapped with common hardware screen. Filter fabric is the
<br />preferred wrapping, if available in smaller quantities.
<br />All pipe joints MUST be threaded or slip—fit. NO GLUED JOINTS,
<br />XIV -17 INSTALLATION INSPECTION PROCEDURE AND CHECKLIST
<br />A completed "Installation Inspection Procedure and Checklist"
<br />form is to be provided to the Shell Engineer for approval on
<br />completion of the tank installation. FAILURE TO PROVIDE AN
<br />ACCEPTABLY COMPLETED FORM WILL RESULT IN NON—PAYMENT OF THE
<br />INSTALLER'S FINAL INVOICE.
<br />XIV -18 TANK REPAIRS AND ADDITIONAL FEATURES
<br />Tank repairs or the installation of additional tank features (turbine
<br />sump collars, additional bungs, etc) may ONLY be accomplished by
<br />factory trained and factory authorized personnel in order to maintain
<br />the original testing laboratory listing. Such work by non—authorized
<br />contractors or their personnel is STRICTLY FORBIDDEN.
<br />XV — GASOLINE PIPING SPECIFICATIONS
<br />XV -1 GENERAL
<br />The contractor accepts full responsibility for proper handling
<br />and installation of ALL primary and secondary piping and shall
<br />insure that good workmanship practices and construction
<br />procedures are followed throughout the installation, regardless
<br />of the inclusion or omission of any applicable suggestion in
<br />these instructions or on the drawings.
<br />Unknown situations or conditions not covered herein are the
<br />responsibility of the contractor. Manufacturer's specialists
<br />and Shell engineers are available for consultation. The
<br />presence of a Shell or Manufacturer's representative at an
<br />installation site does not relieve the contractor of the
<br />responsibility for a proper installation.
<br />The contractor shall be responsible for proper safeguarding of
<br />the installation and materials and equipment stored on the site
<br />to prevent theft, vandalism or damage.
<br />XV -2 SCOPE OF WORK
<br />The piping system to be installed under this section will
<br />include product, vent, and applicable vapor piping as shown on
<br />the plot plan or covered in the addenda to these specifications
<br />or on the related piping drawings. Included are appropriate
<br />connections and appurtenances to the installed equipment in the
<br />complete system, e.g., underground tanks, pumps, dispensers and
<br />indicated vapor control or recovery equipment. Contractor
<br />should refer to the plot pion for the orientation of connections
<br />at tanks and pipe chases for piping.
<br />XV -3 PIPING MATERIALS
<br />1. All primary piping is to be alcohol—compatible Underwriters
<br />Laboratory, Inc. approved reinforced thermosetting resin
<br />Pipe (fiberglass), molded fittings and adapters. Refer to
<br />the Approved Material List for current approved suppliers
<br />and type of system to be used.
<br />We anticipate adding specifications herein for contained
<br />flexible piping after first resolving inadequacies in current
<br />codes. Until further notice, Shell engineers may elect to
<br />use contained flexible piping only on a site—by—site basis
<br />with prior approvals of Marketing Engineering. Piping plans
<br />for such projects must be prepared and approved by
<br />Marketing Engineering. Shell field Personnel and consultants
<br />are hereby Prohibited from wring such plans.
<br />ALL SECONDARY CONTAINMENT PIPING HARDWARE MUST
<br />ALLOW FULL EXPOSURE AND ACCESS TO ENTIRE PRIMARY
<br />SYSTEM SURFACE, NOT JUST THE JOINTS AND FITTINGS.
<br />Only "w t" primary piping (that routinely containing fuel such
<br />os product lines) are intended to be secondarily contained.
<br />"Dry" piping (vapor recovery, vents, etc) is intended to be
<br />uncontained since these lines are not intended to carry
<br />liquid at any time, are designed to prevent the intrusion of
<br />liquids from the tank, and are sloped back to the tank to
<br />prevent the retention of standing liquids. See appropriate
<br />Installation drawings for details. Where mandated by local
<br />codes, these lines can also be secondarily contained.
<br />For Non—Alcohol Fuels
<br />Fill pipes and other vertical risers at tanks and above
<br />ground vent risers shall be standard galvanized steel
<br />pipe with fittings standard galvanized malleable iron.
<br />Galvanized malleable iron unions, where called for on the
<br />detailed drawings shall be ground joint construction with
<br />brass/brass seat, 150# for above ground and 250/300# for
<br />below ground applications. Galvanized malleable iron
<br />couplings, where required are to be extra heavy duty.
<br />Joints of steel piping shall be made up with an approved
<br />gasoline and alcohol pipe compound (no teflon tape).
<br />For Alcoh Fuels an Blends:
<br />here fuel contain r are likel, to contain alX.,eon
<br />go vaniz pipe, o well as o r material may
<br />used. Consult ith Ni Engineeri for uth e install9ons or up ode S. �
<br />Flexible onnectors, here cane for, shall e U.L.
<br />a r ed withit 3 oX swiveling d fitting. ee sect
<br />All pipe,tangs, app enances, op tubes 3/76"
<br />press equolizoti ( n boxes
<br />valves JzFe to be fished
<br />XV -4 PIPING INSTALLATIONS
<br />1. PRIMARY PIPE SYSTEMS
<br />Storage and handling, stringing, joining, layout and
<br />preparation for installation, cutting, tapering, bonding,
<br />curing, adaptors to steel piping, and flexible connectors
<br />shall be in accordance with manufacturer's instructions or
<br />recommendations. Contractor must be familiar with such
<br />practices and procedures and follow some unless certain
<br />instructions which are specificoliv covered in these
<br />specifications, i.e., pipe burial, seem to be at variance.
<br />In such case, Shell's specification will be followed.
<br />All unconnected pipe stubs or runs shall be protected
<br />during construction against the intrusion of dirt or other
<br />foreign material into the piping system. Protective caps
<br />used in shipping the pipe are suitable if taped in place.
<br />Where repairs are found to be required during construction
<br />or after testing or inspection, the defective portion of
<br />the piping shall be removed and replaced with appropriate
<br />new pipe and fittings. Repairs such as a sleeve type line
<br />patch over a damaged pipe or a glass cloth and adhesive
<br />build—up over a joint or fitting are not acceptable on new
<br />work.
<br />Based on criteria available from manufacturers we have
<br />selected the following minimum bending radii for 2" to 4"
<br />fiberglass pipe, which will simplify any field calculation
<br />for installation of ❑ bend if one is required.
<br />PIPF nIAMFfFR
<br />Galvanized steel piping has been selected to be used in
<br />conjunction or in lieu of fiberglass piping at such
<br />locations where size of the piping, complexity of the
<br />arrangement, structural needs, or aboveground application
<br />precludes the use of fiberglass material. In such cases,
<br />protection from galvanic corrosion may be required. All steel
<br />piping joints shall be made up using an approved gasoline
<br />and alcohol compatible pipe compound (no teflon tape). The
<br />preferred thread compound for steel hardware is Gasiola Soft—Set
<br />with Teflon as made by Federal Process Company, Cleveland,
<br />Ohio 44122. Litharge and glycerine are not approved. All
<br />unconnected pipe stubs, risers, or runs shall be capped to
<br />prevent tampering or the intrusion of dirt. The use of a filler
<br />material, such as plumber's string, in making a pipe joint when
<br />threads are improperly cut is unacceptable.
<br />These drawings and specificotions are Shell Oil Company's
<br />(generic depictions of one or more components of its
<br />standard retail service station designs. They are not
<br />intended for use on specific projects. These drawings and
<br />specifications are the confidential and proprietary property
<br />of Shell Oil Company and shall not be copied or reproduced
<br />without Shell's written authorization.
<br />Shell Oil Company. All Rights Reserved 1997
<br />2"
<br />Minimum Bending Radius (Ft)
<br />57'
<br />84'
<br />108'
<br />Pipe Length/Degree of Bend (Ft)
<br />1'
<br />1-1/2'
<br />2'
<br />(Example -15 degree bend—Pipe Length
<br />15'
<br />22-1/2'
<br />30'
<br />MIN.
<br />LENGTH
<br />MAX.
<br />PIPE SIZE
<br />BENDING RADIUS
<br />OF PIPE
<br />DEFLECTION
<br />2
<br />57'
<br />15'
<br />24"
<br />3"
<br />84'
<br />15'
<br />16.2"
<br />4�'
<br />108'
<br />15'
<br />12.6"
<br />Galvanized steel piping has been selected to be used in
<br />conjunction or in lieu of fiberglass piping at such
<br />locations where size of the piping, complexity of the
<br />arrangement, structural needs, or aboveground application
<br />precludes the use of fiberglass material. In such cases,
<br />protection from galvanic corrosion may be required. All steel
<br />piping joints shall be made up using an approved gasoline
<br />and alcohol compatible pipe compound (no teflon tape). The
<br />preferred thread compound for steel hardware is Gasiola Soft—Set
<br />with Teflon as made by Federal Process Company, Cleveland,
<br />Ohio 44122. Litharge and glycerine are not approved. All
<br />unconnected pipe stubs, risers, or runs shall be capped to
<br />prevent tampering or the intrusion of dirt. The use of a filler
<br />material, such as plumber's string, in making a pipe joint when
<br />threads are improperly cut is unacceptable.
<br />These drawings and specificotions are Shell Oil Company's
<br />(generic depictions of one or more components of its
<br />standard retail service station designs. They are not
<br />intended for use on specific projects. These drawings and
<br />specifications are the confidential and proprietary property
<br />of Shell Oil Company and shall not be copied or reproduced
<br />without Shell's written authorization.
<br />Shell Oil Company. All Rights Reserved 1997
<br />
|