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G6. Piping Connections 1311. Seale bine Enclosure Secondary piping can be connected to the tur a enclosure using the In high groundwater�ll6(tions,a sealed turbine enclosure is required to field-installed FRP coupling or rubber grommet:both are available from prevent water infiltration.The sealed turbine enclosure is mounted and 0/C TANKS as optional fitting kits. cemented to the tank collar using the same procedures described in sec- The rubber grommet provides acompression seat toprevent water run. tion G5.Also.the top of the sealed turbine enclosure is mounted and off from entering the turbine enclosure at the piping penetration, cemented in place. However,grommets are not recommended for high ground-water condi- Sealed turbine enclosures have factory-installed electrical fittings.if the tions.See section H3 for detailed installation instructions. sealed turbine enclosure is to be leak-tested using a standing water test, The FRP coupling provides a water-tight seal at the piping penetration for use seal-off fittings to make the electrical wiring connections leak-free. high groundwater conditions.See section H4 for detailed installation To adjust for the final burial depth,trim the bottom of the sealed turbine instructions. enclosure or the bottom of the fiberglass top before cementing in place. To minimize water infiltration in the turbine enclosure,FRP couplings or The sealed turbine enclosure must be isolated from direct traffic loading. grommets can be installed anywhere on the turbine enclosure provided Use 2"thick compressible foam board i x 4 1 on top of the sealed tu r- they do not interfere with the adhesive channel and are aligned radially to bine enclosure.The concrete traffic slab can be poured directly onto the the turbine enclosure center. compressible foam board.(See section Ft 1 for more details). A minimum 30"diameter(or 24"square)street box is required to remove FRP Coupling FRP Secondary Pipe Installed the oval lid onthe sealed turbine enclosureafter itisinstalled. Detail in Grommet Turbine Enclosure WARNING:DO NOT AIR PRESSURE TEST SEALED TU RBINE Exterior ENCLOSURE. Taper_` FRPSecondary i...`.."-' Containment Pipe Sealed Turbine Enclosure �-1 Turbine ._.\5�-__ ---FRP Tap Enclosure Exterior "� �i \_RubberGrommet r� a G7. Hydrostatic Water Test {6" ax. Turbine Enclosure Y Trim here-1 1 After the adhesive has cured,test the turbine enclosure to assure it is leak to adjust portions not trim `Reid tree.Fill the collar and turbine enclosure with 3"of water above the for final upper portions of Bonded Joint burial depth the turbine �j highest adhesive channel(or field-installed FRP coupling)and inspect the —r— enclosureor 9 outside of the joint and collar for leaks. , collar Detail 72^Max. A standing water testis an alternate test method.Monitor the water level �_�_ — — — t ��Secondary for 24 hours.If the water level is within Y4"after 24 hours,the system is - Containment Collar considered leak free. �, m G8. Electrical Connections t� Optional rubber grommets can also be used to field-install the electrical fit- bogs G12. Monitoring on the turbine enclosure(see section H3 for detailed installation instruction).However grommets are not recommended for high ground- All turbine enclosures must be equipped at the jobsite with an water conditions.The sealed turbine enclosure includes factory-installed optional electronic monitor to detect the accumulation of liquid in electrical fittings,which are water-tight for high groundwater applications. the collar.The monitoring sensor should be placed in a protective Electrical conduits are then connected to the threaded steel couplings.Four casing,which has been perforated.The casing is fastened to the sensor fittings are provided in the optional electrical fitting kit to accommodate wir- mounting bracket on the side of the turbine enclosure using a mounting ing to the submersible pump and optional monitoring sensor.All wiring con- clamp. nections must conform to local and national electrical codes. The optional 0/C TAN KS supplied pipe sump sensor(see section F 13)is already mounted inside a plastic casing and is supplied with the mounting clamp. G9. Install Polyethylene Top and Backfill If the monitoring sensor detects liquid in the collar,OIC TANKS After completing all piping and electrical piping connections,vanthe recommends that the power on the submersible pump be discon- final grade and trim the top of the turbine enclosure,if necessary.The netted.This can be performed automatically by providing an electrical polyethylene top is then placed over the turbine enclosure.This top is feedback circuit from the monitoring system to disengage the submersi- designed to prevent water runoff from entering the turbine enclosure ble pump(See section 04,Transmission Contact Switch for optional O/C After positioning the top,you should press down to seat the top onto the TANKS Control Panel), turbine enclosure.Then backfill to the turbine enclosure top. G13. Traffic Slab G10. Top Clearances Traffic areas require a rebar reinforced concrete road surface to span the The turbine enclosure must be isolated from direct traffic loading.After underground void created by the turbine enclosure. backfilling to the top of the turbine enclosure,place 11/4"of specified gravel and then 3/4"thick plywood(4'x 41 over the top to allow a 2" minimum clearance between the top of the turbine enclosure and bottom G14. Maintenance of the concrete pad,if the tank is located in a traffic area,the 9"thick traf- Use caution for normal maintenance or inspection of the submersible fic slab with extra rebar reinforcement can be poured directly onto the Use piping located in the turbine enclosure. plywood.This 2"clearance also provides a channel for water runoff. pump WARNING:FUEL VAPORS MAY BE PRESENT IN THE TURBINE ENCLOSURE.TO PREVENT FIRE OR EXPLOSION HAZARD,KEEP Isolate turbine enclosure from di rect traffic loading. ALL IGNITION SOURCES AWAY WHEN REMOVING THE PIPING SUMP LID. Reinforced concrete" e5 rebar 8"oc both ways Rebar mat must extend 24" G15. Future Periodic Testing 4feet inall terof risers street Box*',. Using the water test as described in section G7,leak test the tur- bine enclosure assembly at least once ayear. 2"minimum —HDPETop clearance 1 U4"gravel,then Plywood" —Turbine Enclosure "Contractor 48"x48"x�."Thick Supplied Items Collar 15