INSTALL_1992 - Laserfiche WebLink

Home Browse Search

A9. Installation ProceduAMet Hole A13. VentinFE A filter fabric separator maybe appropriate to prevent gravel migration. All tanks must be vented,as tanks are designed for operation at Refer to Section AS for details.Water level should be maintained at lowest atmospheric pressure only,except for use with vapor recovery systems pracl level by using pumps withorwithoutawell-point system. provided the pressure or vacuum does not exceed l psi.The vent open- tica rep ca bed as outlined m Section or ing should be the same diameter or larger than the piping to remove product. Ballast For double-wall tanks,if the monitoring cavity between the inner and If the water can not be lowered, outer tank is also vented,it must be vented independently from the you will need to ballast tanks. primarytank. Place tanks in the hole,adding Pressurized deliveries are not recommended.if the delivery only enough ballast to sink them. vehicle uses pumps to fill the tank,install overfill shut-ottequip- ealleedwast ater terlev lin hot durinneverg ment in the tank and truck to prevent the tank from being overfilled. equip- exceed it elinhole ballast OVERFILLING THE TANK UNDER PRESSURE WILL DAMAGE THE ineonitioningca le to eptast, TANK,EVEN IF THE TANK VENT IS UNRESTRICTED. use only lifting cable to keep tanks in position.Tanks should be free to roil Slightly. A14. Manway and Manway Extensions Backfilling Distribute backfill evenly around The standard manway is 22"in diameter and has a load bearing capacity tanks.Push backfill undertook of 1200 lbs.Optional heavy duty manways have a load bearing capacity atter each drop using either handled robe backfill fee of 2400 lbs.Fiberglas heavy duty manways must be specified on tanks P 9 9 P I equipped with helical heating coils,agitators or pumps with a total After backfill is at least 2'up the tank sides,additional backfill can be downward load of greaterthan 1200 lbs.but less than 2400 lbs. freely added to tank top without using the probe or air jet. An air jet can be constructed by using a a/4"diameter pipe connected too A15. Manway Risers minimum 65 cfm air compressor.A valve on the air jet is essential so the operator can safely control the flow. The Fiberglas Manway Riser provides access from a manhole box and Additional information on alternate out of hole techniques are available cover.Since the bottom is open,the manway riser will fill with water as from OIC TANKS.Ask for Pub.No.3-PE-13415.Alternate Backfill water surrounds it on the outside.Traffic areas require a reinforced Procedure. concrete traffic pad. A maximum of 2 manway risers may be used with tank sizes of 10,000 gallons and larger;only one riser is permitted with tank sizes less than A10. Piping and Sump Clearances 10,000 gallons due to possible buoyant forces. Tanks with Bottom Sumps The riser must be instal led with a 6"minimum clearance from the top of Tank With Bottom Sump the tank.The bottom of the riser should be supported with 2"x 4"x 3' Wheninstailing a tank equipped minimum wood pieces.Additional data on manways,extensions,and with a bottom sump,excavating risers may befound in O/C TANKS Pub.3-PE-6312. and bedding must be modified to WARNING:DO NOT ENTER TANK;ENTRY CAN RESULT INSUF- provlde a 12"deep x 24" FOCATION,EXPLOSION,OR FIRE. diameter hole centered at the sonom sump location.After the tank is Sump placed,the void surrounding the sump is to be hand backfilled and A16. Site Monitoring Wells Il hand tamped prior to adding For new installations,place monitoring wells at least one foot outside of backfill around the tank. tank outer diameter. `.� Ildrilling new site wells at existing installations,place monitoring wells r.., '- '/ "'I° minimum of 3 feet from tank sides or ends.Backfill with same materials as External Piping tank backfill. External Piping I.I It The pump and attached piping must be free to move with thetank. A17. Barricades Isolate Use a fill box or street box to isolate piping tram the piping from the traffic pad. Tank area must be barricaded to prevent any vehicle travel over the tanks traffic slabs.. Take precaution during construc- until installation is complete. Jon to ensure no damage occurs the exposed piping and fittings. Internal Piping A18. Installation Checklist Internal Piping Complete the installation checklist(15•PE8894)included inthe tank ship- Internal piping must be a minimum ping packet.Measure,record and compare the tank vertical diameter :; 'a•-1o• 1z' of4"from the tank bottom(12' reading before backfilling and after backfill is broughtupto suhgradeto dia. dia diametertanks require a6" verify the tank backfill support.A copy of the Installation checklist a^ s^ minimum clearance). must be retained by the tank owner and/or Installation contractor min. min to validate any future warranty claim. Some local authorities may require final precision tank testing.Check ` local authorities for final precision testing requirements. A19. For Additional Information On A11 . Tank Fill Tube Insert Other Installation Details. A fill tube insert must be installed atthe tank gauging fitting if the manual Specific procedures for encasing a tank in concrete or adding tanks to dipstick method is used.This ensuresthatthe dipstick pointof impact is existing installations and alternate installation techniques are available by aligned with the tank bottom protector plate.Minimum clearances for contacting your Fiberglas Tank Sales Representative orthe Fiberglas internal piping are covered in section At 0. Tank Installation Manager. If you have an installation situation that is not fully addressed in these ilk, Filling Tanks you ar unable to ct yourcontact ocalur Fiberglas Tank Sales Representative.If �byou are unable to contact your local representative,call: o not fill untlI backfill is to top of tank.Never add product or water O/C TANKS Installation Manager Toledo,Ohlo (419)248-7371 Al for hold-down in dry hole conditions until backfilling is completed O/C TANKS Field Service: to tank top. Northeastern Region Field Service Supervisor Ml.Union,PA(814)542-8621 (Exception—See Installation Procedure-Wet Hole—section AB) Central Region Field Service Supervisor Conroe,Tx 409)756.7731 Western Region Field Service Supervisor Bakersfield,CA 5805)399-9556 Field Service Manager Toledo,OH (419)248-8196 6