23 CCR Ch 16 Art 3

Question 1

2630(a)

To whom do Article 3 requirements apply?

Answer 1

The requirements in this article apply to owners of new underground storage tanks.

Question 2

2630(b)

What do Sections 2631 & 2632 address?

Answer 2

These sections specify design, construction, and monitoring requirements for all new underground storage tanks.

Question 3

2630(b)

What do Sections 2633 & 2634 do?

Answer 3

These specify alternate design, construction, and monitoring requirements, in lieu of those specified in sections 2631 and 2632, for MVF USTs installed before January 1, 1997.

Question 4

2630(b)

How do you monitor USTs constructed pursuant to Section 2633 in lieu of those specified in Section 2631?

Answer 4

These shall be monitored in accordance with Section 2634.

Question 5

2630(c)

To which sections must all new USTs, piping and secondary containment systems comply?

Answer 5

These must comply with Sections 2635 & 2636.

Question 6

2630(d)

Which sections apply to the monitoring equipment used to satisfy the requirements of Article 3?

Answer 6

Such equipment must meet the requirements of Section 2643(f), and it must be installed, calibrated, operated, and maintained in accordance with Section 2638.

Question 7

2631

What does the general Section 2631 specifically address?

Answer 7

Design and construction requirements for new underground storage tanks.

Question 8

2631(a)

What must all new USTs and associated piping have if storing hazardous substances?

Answer 8

Primary and secondary containment.

Question 9

2631(a)

Primary containment must be ______ _____.

Answer 9

product tight.

Question 10

2631(a)

Is secondary containment required to be constructed as a separate containment system?

Answer 10

It can be constructed as either a separate containment system, or as an integral part of the primary containment system.

Question 11

2631(a)

What’s the importance of Section 2637(a) with regard to secondary containment for new USTs and associated piping?

Answer 11

These must be designed and constructed such that they can be periodically tested according to Section 2637(a).

Question 12

2631(b)

What has to be done for the design and construction of primary containment including integral secondary containment, as well as all components used to construct it?

Answer 12

It shall be approved by an independent testing organization in accordance with industry codes, voluntary consensus standards, or engineering standards. Except as provided in subsection 2631(j).
[Effective 7/1/91 for USTs, 1/1/92 for piping, 1/1/95 for all other components.]

Question 13

2631(b)

What does 2631(j) address?

Answer 13

It talks about how to address those situations in which the independent testing organization’s approval doesn’t include a compatibility statement for the hazardous material being stored in the containment.

Question 14

2631(b)

What must be visible on the exterior surface of underground storage tanks?

Answer 14

They shall bear a marking, code stamp, or label showing required minimum information.

Question 15

2631(b)

What are the first three pieces of information required to be listed on the outside of a new UST?

Answer 15

(1) Engineering standard used;
(2) Nominal diameter in feet;
(3) Nominal capacity in gallons;

Question 16

2631(b)

What are the next three pieces of information required to be listed on the outside of a new UST?

Answer 16

(4) Useable capacity in gallons;
(5) Degree of secondary containment;
(6) Design pressure in psig;

Question 17

2631(b)

What are 7th and 8th pieces of information required to be listed on the outside of a new UST?

Answer 17

7) Max operating temperature in Fahrenheit;

(8) Construction materials;

Question 18

2631(b)

What are the last two pieces of information required to be listed on the outside of a new UST?

Answer 18

(9) Year manufactured

(10) Identity of manufacturer.

Question 19

2631(c)

What must a primary containment system, with or without an integral secondary containment system, always have?

Answer 19

It shall have wear plates (striker plates) installed, center to center, below all accessible openings.

Question 20

2631(c)

What must the striker plates be made of?

Answer 20

Steel or other appropriate material if steel is not compatible with the hazardous material being stored.

Question 21

2631(c)

How big must the striker plate be?

Answer 21

At least 8 inches on a side, or equal to the area of the accessible opening or drop tube, whichever is larger.

Question 22

2631(c)

What can be used in place of a striker plate?

Answer 22

A drop tube-mounted bottom protector.

Question 23

2631(c)

How thick must a striker plate be?

Answer 23

At least 1/8-inch thick. If less than 1/4-inch thick, then it must be rolled to the contours of the UST and bonded or tack welded in place.

Question 24

2631(d)

How must secondary containment be designed if not an integral part of the primary containment?

Answer 24

It shall be designed and constructed according to an engineering specification approved by a state-registered professional engineer or nationally recognized industry code or engineering standard.

Question 25

2631(d)(1)(A)

How big must the secondary containment be if it contains only one primary container?

Answer 25

100% of the usable capacity of the primary containment system.

Question 26

2631(d)(1)(B)

How big must the secondary containment be if it contains more than one primary container?

Answer 26

150% of the volume of the largest primary container, or 10% of the aggregate internal volume of all primary containers, whichever is greater. [Note: Does not apply if all the primary containers are enclosed by secondary container.]

Question 27

2631(d)(2)

What must be done if the secondary is open to rainfall?

Answer 27

Then you must add the volume of water that would enter the system during a 25-year, 24-hour storm, in ADDITION to the aforementioned volume requirements.

Question 28

2631(d)(3)

If the secondary containment contains backfill material, what must be calculated?

Answer 28

The pore space. It must meet the volume requirements for secondary containment as described earlier.

Question 29

2631(d)(4)

With what must a secondary containment system be equipped?

Answer 29

A collection system to accumulate, temporarily store, and permit removal of any liquid within the system.

Question 30

2631(d)(5)

How must the floor of the secondary containment system be constructed?

Answer 30

On a firm base and, if necessary for

monitoring, shall be sloped to a collection sump.

Question 31

2631(d)(5)

What’s required to be installed in a secondary containment system to allow the removal of collected liquid?

Answer 31

One or more access casings shall be installed in the sump and sized to allow removal of collected liquid.

Question 32

2631(d)(5)

How must access casings for secondary containment systems be constructed (general requirements)?

Answer 32

• Shall extend to the ground surface.
• Be perforated in the region of the sump.
• Locked waterproof cap or enclosed in surface security system to prevent entry of surface water, accidental damage, unauthorized access, or vandalism.

Question 33

2631(d)(5)

If there’s no locked waterproof cap or surface security system, what will satisfy the requirements for protection against unauthorized access and vandalism of a secondary containment system?

Answer 33

A facility with locked gates.

Question 34

2631(d)(5)

How must access casings for secondary containment systems be constructed (more specific requirements)?

Answer 34

• Sufficient thickness to withstand anticipated stresses.
• Made of materials not be weakened by the stored hazardous substance and will not donate, capture, or mask constituents for which analyses will be made.