# How do you calculate secondary containment?

Table of Contents

## How do you calculate secondary containment?

Customer Questions: Calculating Secondary Containment Needs

- Length (L’) x Width (W’) x Height (H’) x 7.48 = Sump Capacity (Gallons)
- L x W x 2’H x 7.48 = 520 gallons.
- L x W x 14.96 = 520 gallons.
- L x W = 520/14.96 = 34.76.
- So any combination of L x W >= 34.76, where L > 5.5 and W > 3.5 will work.

## What is the standard ratio of secondary containment?

The secondary containment system “must have sufficient capacity to contain at least 10% of the total volume of the primary containers or 100% of the volume of the largest container, whichever is greater.”

## How do you calculate Bund amount?

What Capacity Is Required for a Bund?

- Identify the volume of the largest container to be stored within the bund.
- Add 10% to this volume of the largest container, e.g. 207L + 10% = 228L.
- Measure the length x width in cm of the area where the bund is to be located.
- There are 1000 cubic cm in 1 litre.

## How much Spill Containment do I need?

According to federal codes, a containment system must have a sufficient capacity to contain 10% of the volume of the containers or the volume of the largest container, whichever is greater. Some states may have more stringent restrictions and you should contact your AHJ for your local requirement.

## What needs secondary containment?

Who Needs Secondary Containment? If you store hazardous materials and/or hazardous wastes in your facility, you are likely to need secondary containment systems to meet one or more regulations. OSHA and EPA have very broad definitions of what constitutes a hazardous material.

## What is the meaning of secondary containment?

Secondary containment is a liquid-tight barrier that will contain hazardous materials that are released from a storage container. A simple example of secondary containment is placement of a 5-gallon drum (primary containment) inside a 55-gallon drum (secondary containment).

## Do double walled fuel tanks need secondary containment?

Secondary containment means placing tanks or containers within an impervious structure capable of containing 110% of the volume contained in the largest tank within the containment structure. Doublewalled tanks do not require additional secondary containment.”

## What is the primary function of secondary containment?

The purpose of secondary containment is to prevent releases of chemicals to the environment and reduce contamination of soil and groundwater. Secondary containment requirements provide temporary containment of accidental spills or leaks until appropriate response actions are taken by the owner/operator.

## How much should a bund hold?

Bunds should be sized to hold 110% of the maximum capacity of the largest tank or drum.

## What is the purpose of dyke wall?

They prevent contamination of land, underground water as well as surface water. In addition to the above; they are having very important function of safety also.

## What qualifies as secondary containment?

## Do you need a secondary containment calculation worksheet?

These worksheets address four specific scenarios and may not be valid for every facility. Although the SPCC rule does not require you to show the calculations of sized secondary containment in your plan, you should maintain documentation of secondary containment calculations to demonstrate compliance to an EPA inspector.

## How to calculate secondary containment for a spill?

For Professional Engineer (PE) certified plans, the PE may need to account for site-specific conditions associated with the secondary containment structure which may require modifications to these sample calculations to ensure good engineering practice. Please note: Word versions are fill-in the blank only. PDF forms compute calculations.

## What are the dimensions of a secondary containment system?

Disclaimer: These are simplified calculations for qualified facilities that assume: the secondary containment is designed with a flat floor, the wall height is equal for all four walls, and the corners of the secondary containment system are 90 degrees.

## How to calculate the capacity of a concrete dike?

The total capacity of the concrete dike is reduced by the volume “displaced” by other tanks inside the containment structure. The displacement is: = number of tanks x footprint x height of dike wall = 2 x ∏ (10 ft)2/4 x 1.5 ft = 235.6 ft3 = 1,762 gallons