INSTALL_1999 - Laserfiche WebLink

Home Browse Search

2. SECONDARY PIPE SYSTEMS (CONTAINMENT) All containment hardware (including clamps, seals, gaskets, flexible boots, etc) are "contractor furnish and install" items. All such hardware Is available through local distributors. See Approved Materials Lists for approved suppliers. 3. a All containment hardware is to be slipped over primary piping and left loose while primary piping is joined. After all segments of primary piping have been pressure tested (50 psig minimum with soap for 1 hour), secondary containment hardware may be joined and similorlyressure tested (3 to 5 psig MAXIMUM with soap for 1 hour). Stainless steel worm clamps must be tightened in two separate passes. First pass, tighten to 35 to 40 inch— pounds torque. Second pass, tighten to 60 inch—pounds torque. NEVER tighten clamps from 0 to 60 inch—pounds in a single pass or minor joint leaks may result. Containment hardware must be installed per instructions herein and manufacturer's guidelines. Do not mix brands of hardware unless instructed to do so in these drawings. Containment Technology Corp (CTC) can furnish 6" diameter HDPE tank riser containment pipes (either TEE'd version or non—TEE version). These riser containment pipes have a 1" threaded port for sensor conduit. Unless required by local codes or specified by the Shell engineer, all tank risers except turbine sump will NOT be monitored by a sensor as they should never (or very Infrequently) contain any liquid. Installation drawings show details for such sensors. IF/WHEN TANK RISERS ARE CONTAINED, CONTRACTOR SHALL ALWAYS INSTALL PRESSURE TIGHT CONDUITS AND ANY ACCESS BOX, EVEN IF SENSORS ARE NOT INSTALLED AT THIS TIME. THREADED CONDUIT JOINTS MUST BE PREPARED WITH AN ELECTRICALLY CONDUCTIVE THREAD COMPOUND TO MAINTAIN CONTINUITY PER N.E.C. (NEPA-70) AND TO INSURE THAT GROUND WATER DOES NOT INTRUDE THROUGH THESE JOINTS INTO THE CONDUITS AND, THUS, INTO SECONDARY CONTAINMENT SPACES. FLEXIBLE CONNECTORS/SWING JOINTS Flexible connectors are to be installed at the following points; A. Between submerged pumps and fiberglass product lines. B. Under each dispenser for both gasoline and vapor recovery as shown on installation drawings. C. Underground at the base of vent risers. D. At piping connections to waste oil & fuel oil tanks. Swing joints of galvanized hardware are ONLY permissible in 3" or 4' galvanized pipe runs (ie: remoted fills and stage I vapor connections) and ONLY where shown on applicable installation drawings. A Alpe swing pint shall be composed of two elbows (or similar fittings and a pipe nipple. Typical approved short nipples, which will allow the use of a pipe wrench on the body of the nipple between two fittings would be as follows: PIPE SIZE (in) NIPPLE LENGTH (in) INSTALLED LENGTHS (in) 1/2 2 1 314 from American Liquid Controls 2 11/8 1-1/2 2-1/2 1-1/2 2 3 1-1/2 3 3-1/2 1-1/2 4 4 1-3/4 Where connectors are completely contained (ie: not in contact with ground water, native soil, or backfill material), standard stainless steel connectors with one swiveling end fitting are quite acceptable. Where connectors are not completely contained, ONLY anti— corrosion or non—metallic connectors with one swiveling end fitting may be used. See the Approved Materials Lists for acceptable hardware. NOTE: Single—plane swiveling NET end fittings use two gasoline and alcohol compatible C—rings that seal tighter as pressure increases. 0—rings ore not used. VENT AND VAPOR PIPING — SLOPE OF LINES A minimum slope of 1/8" per foot is required for all underground vent and vapor piping. However, the maximum available slope should be used within requirements for cover over piping and depth of tanks. Pipe cover requirements are detailed on installation drawings. Piping will be installed on pre—graded compacted bed material. No support or spacing material other than the bed and backfill will be left in contact with the piping. This method of installation should prevent the possibility of any sags or humps which would trap the lines and which will not be permitted. An uncontained 3" or 4" fiberglass stage li vapor manifold is required to interconnect tanks at the turbine end of said tanks. This configuration is C.A.R.B. approved (see D-97004). Actual piping connections to tanks must utilize ball flout valves with no—bleed nipples. These valves ore NOT for overfill protection; they only provide added insurance against cross—drop product contamination. 5. TANK FITTINGS, MANHOLES, AND APPURTENANCES All fills (including remotes) are to incorporate an automatic shutoff fill tube (see Approved Materials Lists for acceptable hardware). Said tubes are to be flanged under the truck hose connection collar. The tubes come as kits and require field assembly before installation. Shell's approved spill—containment fill box Is a very unique concept with a vapor & water tight sealed inner lid. This fillbox is a complete assembly which includes on 18' diameter slab access box with an 18" diameter structural fiberglass lid. See the Approved Materials Lists for supplier details. The MANDATORY absorbent sock for below—grade fillboxes is not furnished by the box fabricator, but must be purchased separately by the contractor. These absorbent socks are 3" to 4"" in diameter by 48"' long, are hydrophobic (will not absorb water), and oleophilic (will absorb petroleum products and any chemical additives bonded to the petroleum molecule. Preferred suppliers are: WOLF "oil Only" 1-800-227—WOLF MATASORB "M-30" 1-800-222-4799 OCLANSORB "Sorb—Sox" 1-403-290-6650 Stage I vapor risers will utilize a standard 12" diameter slab access box with a 12" by 4" Fil—Seal—Pak nitrite liner from American Liquid Controls (phone 1-313-646-3732). Submerged turbines are furnished by Shell and are to be ordered for the appropriate tank diameter with a manway and with a maximum 12" mounting riser. The turbines are installed inside a 42" or 48" fiberglass sump furnished by the tank manufacturer. These sumps come standard with a water—tight lid. The sump height can be field adjusted by trimming the bottom edge of the sump barrel, NOT the edge of the collar (which Is factory—bonded to the tank). For increased depths, two barrel sections may be stacked. All penetrations and cuts on these sump barrels should be accomplished with carbide or carborundum hole saws and blades. Ordinary cutting tools will not survive the cutting process. The sump barrel joints may be sealed in the field without affecting the U.L. Label by ordering the sump bonding kit from the tank manufacturer. All penetration fittings must be installed wet with Bostick's Chemcaulk 1000, Siliprene, RTV, or DAP 100% Siliconized Rubber Sealant (concrete crack sealer). All are compatible with gasoline and alcohol. The latter is normolly available in typical hardware stores. The normal leak test for a turbine containment sump will be a hydrostatic test with water. However, a sealed—joint sump with pressure—tight lid may be pressure tested to a MAXIMUM 3 psig AFTER THE CONCRETE SLAB HAS BEEN POURED AND CURED. The weight of the slab is MANDATORY for safe pressure testing. Contractor is responsible to provide proper clearances between the turbine sump, fillboxes, etc and the tank risers per applicable installation drawings. Pump and fill box manholes and/or connecting piping must be self supporting and must not column—load the tank. 6. TRENCHING AND PIPE CHASES Trenching width must be sufficient to maintain the proper clearances between pipes and side walls as shown on installation drawings and of adequate depth sufficient to provide the proper bed/cover/pitch of lines per drawings. Note that the minimum cover to finished grade over product lines outside the concrete island mat area is 18 Inches. Pipe chases in the concrete or asphalt paving shall be constructed as detailed on the drawings and as located on the plot plan. The minimum spacing between adjacent pipes is 6", however piping runs may not be layered. Wherever piping runs must cross, a 5" vertical dimension between pipes should also be maintained. The exception to this rule is where a branch line to a dispenser crosses adjacent product lines with a tee and 45 degree elbow as detailed on installation drawings. All open trenches shall be properly barricaded and designated to insure public safety. No trench shall be left open and unmarked overnight. Product piping and stage II vapor piping must terminate at containment pans under the dispensers. These pans must not drain into or through underground piping or through the piping containment. Any liquid trapped within the pans must be removed manually and properly disposed. See Approved Materials Lists for details. XV -5 BEDDING/BACKFILL MATERIALS AND PROCEDURES 1. GRAVEL — STANDARD Standard 'bed and backfill material should be the some as that used in the tank excavation. Insure that It satisfies ASTM C-33 specifications. 2. ALTERNATE — SAND Sand must be clean, washed, inert, well graduated and have the following characteristics: A. Less than 8% by weight passing #200 sieve. Such fines must be nonplastic. B. 1/8" diameter or less particle size. C, Free or organic material, loam, trash, snow or ice. In freezing weather must be kept dry. Sand is not a self—compacting material and will have to be. mechanically compacted In layers of 12" or less to achieve a minimum 90% Standard Proctor Density throughout. Use a mechanical plate—type vibrator (2000-3000 vibrations/ minute). Do not use a concrete vibrator or water tamping. Sand is not a self—compacting material and will have to be mechanically compacted in layers of 12" or less to achieve a minimum 907 Standard Proctor Density throughout. Use a mechanical plate—type vibrator (2000 — 3000 vibrations per minute). Do not use a concrete vibrator or water tamping, Where sand is used to backfill the trenches, filter fabric barriers are required between the trenching and the tank hole backfill material. 3. STORAGE AND HANDLING OF BED/BACKFILL MATERIALS ON SITE Do not allow bed/backfill material to intermix with on excavated soil or other material on site. Contamination of self—compacting gravels could result in the need for mechanical compaction. The minimum/maximum particle sizes specified are critical for self—compaction, In freezing conditions materials must be kept dry and free of ice. Do not intermix grovel, stone or gravel crushings, or sand in the some excavation or connected excavations without filter fabric barriers (see paragraph 4 covering the use of soil stab ltzation and filter fabric to prevent migration between dissimilar soils). 4. INSTALLATION OF SOIL STABILIZATION/FILTER FABRIC All pipe trenches MUST be lined with an approved soil stabilization filter fabric, regardless of soil conditions and type of backfill motorial used. Approved fabric materials are the some as specified in section XIV -9. Material should be cut to on appropriate width for the depth and width of the pipe trench so that there is sufficient material to overlay the top edges of the trench during pipe installation and make a complete envelope of the backfill at sub—grade as shown on detail drawings with a minimum of 6" lap at the top. Lops of material along the trench excavation should be a minimum of 2 feet. 5. BEDDING OF PIPE A minimum 6" deep compacted bed, graded to give the proper slope or depth of pipe runs, must be laid in trench before pipe runs are installed. Pipe runs should be fabricated at grade and installed properly spaced on the completed bed. After making necessary connections of runs, branches, or fittings which must be made up in the trench, bed material should be placed back under the piping and properly compacted. 6. TESTING AND INSPECTION After all lines have been Installed, and before they are backfilled, lines are to be disconnected from the tanks, plugged or capped, subjected to a minimum 50 psi gauge air pressure (or as required by local or state codes) and checked for leaks with a 'soapy" solution in the presence of the Owner's representative for a minimum of 30 minutes. Gauges for this test should be of a range that places the actual test pressure in the middle third of the gauge range (eg: 0-100 psi gauge for a 50-60 psi test). Air testing of fiberglass piping is not a recommended practice by piping manufacturers unless certain safety precautions are followed, Contractors should obtoin appropriate procedures from fiberglass pipe suppliers and assume responsibility for following some for prescribed testing pressures. Their recommendations will Include covering pipe between joints, placing sand bags or other restraints at intervals and numerous safety precautions for personnel working on site and/or involved in the test or inspection. Prior to making the high pressure test in the presence of the Owner's representative, it is recommended that the contractor first apply a low pressure 5 psig leak test to insure that all adapters are securely threaded into place, that adhesive has been applied to every joint, and properly cured. The low pressure leak test can be applied in a short time, thus, immediately locating any badly made joints. The line should be carefully inspected for evidence of leakage by using a soap solution on the joints, fittings, and pipe walls. Once it has been determined that the line is tight, the full test pressure should be applied and allowed to remain as long as specified. After reconnection of all lines and prior to backfilling of some, the entire system, to include tanks and all lines, is to be subjected to a final air test of 5 psig maximum for approximately 1 hour without a pressure loss exceeding 1 psig. Gauges should be 0-15 psi for this test. The contractor will provide the owner's representative with a certificate of testing and inspection indicating that the piping and complete system has been tested in accordance with these specifications and has been found to be tight and in compliance with all state and local codes covering such an installation. 7. BACKFILLING OF THE PIPING After satisfactory completion of all required testing and Inspection of primary and secondary piping, backfilling of the trenches to subgrade elevation should be completed as required for the material used. If it becomes necessary during the course of construction to switch from the standard backfill material to an alternate such as send, soil stabilization and filter fabric must be installed as a barrier between the two dissimilar materials. Approval of the Shell engineer must be obtained before making such a substitution. XV -6 FINAL ITEMS 1. Tanks to be gauged for product level and water. Any measurable amount of water will be removed from the system. 2. All product piping is to be bled carefully for air as submerged pumps are tested. System is to be tested for tightness and proper operation of leak detectors or pressure sensors and impact valves after lines are bled. 3. After calibration check of each dispenser, strainers will be removed and cleaned, taking care to catch any product released while removing filters and/or strainer elements. 4. Check flow rate of each nozzle to insure pumping capacity is adequate according to manufacturer's recommendation. 5. Test the operation of all leak detectors and im act check valves in accordance with annual leak detecto7iine test procedure. 6. The contractor to provide a red lined "as 'built" copy of site plan showing actual location of all piping runs and orientation of all tank appurtenances. Inclusion of 35 mm color slides or photos taken prior to closure of secondary containment or bockfilling ore strongly encouraged. 7. A completed "Installation Inspection Procedure & Checklist" with the accompanying "Certificate of Test' is to be provided the Shell Engineer for approval on completion of the installation. These drawings and specifications are Shell Oil Company's ganeric depictions of one or more components of its standard retail service station designs. They are not Intended for use on specific projects. These drawings and specifications are the confidential and proprietary property of Shell 011 Company and shall not be copied or reproduced Cc) Shell Oil Comoanv. All Riahts Reserved 1997 REV I DATE I BY APPD `)WRSHELL - OIL PRODUCTS COMPANY HOUSTON, TX GENERAL SPECIFICATIONS TANK & PIPING SHEET 3 OF 3 420 WEST KETTLEMAN LANE & HUTCHINS STREET LODI, CALIFORNIA SCALE: NONE ENGR.:GR MARSHALL DATE: 4/1/1997 WIC#: 204-4416-0202 DWN. BY: GR MARSHALL DR 97021 --00 CHKD. BY: