PEI RP-100 Rec. Practices for Installation of Underground Storage Systems Flashcards
What is the proper way to move a tank? (PEI, Section 2.2)
lifting it, using the lifting lugs
installed by the manufacturer.
Cables or chains used to lift a tank should be at an angle from the vertical (included angle) of
no more than _____ degrees. (PEI, Section 2.2)
30
When is it permissible to use chains or cables around the tank shell in order to move the
tank? (PEI, Section 2.2)
Never
At what point in the installation procedure should the air/soap test be performed? (PEI,
Section 3.2)
immediately prior to installation
What should be done with factory installed plugs before conducting the pre-installation
air/soap test? (PEI, Section 3.2)
remove all temporary plugs and thread protectors installed by the manufacturer
What is the maximum allowable internal pressure when performing the pre-installation test
on eight foot diameter steel and fiberglass tanks? (PEI, Section 3.2)
3-5 psi
What parts of a tank should be soaped when conducting a pre-installation tank test? (PEI,
Section 3.2
Soap all surfaces seams and fittings
What is the maximum pressure allowed when air testing 12 ft. diameter fiberglass tanks?
(PEI, Section 3.2)
Recommended 3psi no more then 5 psi
What is necessary to make an air test conclusive? (PEI, Section 3.2
Soaping all fittings an seams air testing for atleast 1 hour while watching psi gauge to look for any drops in pressure an checking for bubbles
What is the recommended range for a pressure gauge used to conduct a tank air test? What
can happen if a vacuum gauge is accidentally used instead of a pressure gauge? (PEI,
Section 3.2)
Use a gauge that ranges 0-10 or 0-15psi MAX , if a vacuum gauge is accidentally used it can cause a serious accident
What device is recommended to prevent over-pressurization when conducting a tank air
test? (PEI, Section 3.2)
Pressure relief valve
What is the correct way to pressurize the interstice of a double-walled tank when conducting
a pre-installation air test? (PEI, Section 3.3)
Pressurize the interstice with air from the inner
tank. Use a third gauge for measuring pressure in
the interstice
What should be done prior to disconnecting any gauges during pre-installation testing? (PEI,
Section 3.3)
Releasing the air pressure
What types of double-walled tanks do not need to have a pre-installation air/soap test? (PEI,
Section 3.5)
Tanks with a liquid- filled interstitial space or tanks with an interstitial space with vacuum
What type of pre-installation test is acceptable for double-wall tanks with a liquid-filled
interstice? (PEI, Section 3.6)
Check the level of the liquid in the interstitial space
What type of pre-installation test is acceptable for double-wall tanks shipped from the
factory with a vacuum in the interstice? (PEI, Section 3.7)
Check the vacuum level gauge
What utilities should be located before excavating begins? (PEI, Section 4.1)
All underground utilities gas, electric, water, sewer and check for overhead power lines
- What are five factors to consider when determining the size, shape and depth of a tank
excavation? (PEI, Section 4.1)
a)
b)
c)
d)
e)
Tank manufacturer install instructions, Stability of soil requirements for compacting bedding, backfill material, space for placing associated equipment, depth of cover
Why do excavation cave-in situations require the use of additional backfill? (PEI,
Section 4.1)
Materila that falls into the hole cannot be used as backfill
In the absence of local building codes or regulations, what is the minimum distance an
excavation should be located from the base of adjacent structures or property lines?(PEI,
Section 4.2)
45 degrees from the base of tank to a point 5ft from line or building foundation
What are five factors to consider when determining the depth of a tank excavation? (PEI,
Section 4.3)
Tank diameter, bedding thickness, hold down pad, depth of cover, slope and length of piping
To provide a firm foundation, backfill material serving as bedding for the tank should extend
how far beyond the actual dimensions (perimeter) of the tank? (PEI, Section 4.3)
Set the tank on a bed of backfill material 1 ft thick that extends 1ft beyond the ends and sides of tank. place at least 2ft of backfill between adjacent tanks and between tanks and excavation walls
What is the recommended thickness of bedding material over a concrete hold-down pad
when a steel tank is to be installed? (PEI, Section 4.3)
UX
6 inches
What is the maximum burial depth for fiberglass tanks? (PEI, Section 4.6)
7 ft