SpillSmart SpillBund & Drill Rig Bund Calculator

1

What Are You Storing?

Enter the volume and quantity for each container type on your site

AS1940 Secondary Containment Requirement

AS1940 requires secondary containment sized to the greater of:
Rule A — 110% of the largest single container volume stored, or
Rule B — 25% of the total liquid volume stored across all containers.
Enter your stored volumes below and the calculator will determine which rule applies.

⚠️ 100 mm wall height — lower capacity than Collapsible or Rigid Bunds. SpillBunds and Drill Rig Bunds are designed for portability and drive-over access. If your AS1940 calculation requires a high containment volume, consider whether a Collapsible or Rigid Bund (300 mm wall) is more appropriate for your site.

Container Type	Volume (L)	Qty	Total (L)

2

AS1940 Minimum Containment Capacity.

Live calculation — updates as you enter your stored volumes above

Largest Single Container

— L

Rule A: 110% = — L

Total Stored Volume

— L

Rule B: 25% = — L

Minimum Bund Capacity Required

— litres

Enter volumes above

⚠️ Outdoor storage? If your bund will be used outside, you may need to allow additional capacity for rainfall accumulation and freeboard. This calculator provides the baseline AS1940 requirement — consult your site environmental management plan for site-specific requirements.

3

Select Bund Type & Size.

Choose your bund type, then enter internal dimensions — capacity updates live

Which bund type do you need?

SpillBund

ES-B-SB-PVC / ELV

✓

Memory foam-filled sidewalls allow vehicles — including forklifts and heavy trucks — to drive directly over the bund wall. Walls spring back into place instantly after being driven over. Lightweight, portable and easy to clean.

Best for: Portable wash bays, drip trays, drum and IBC storage on service vehicles, frequent forklift access zones.

Drill Rig Bund

ES-B-DR-PVC / ELV

✓

Insertable memory foam sidewalls can be driven over when access is required, and removed completely for compact transport and storage. Designed for remote and field deployments where portability is essential.

Best for: Remote worksites, oil, gas and mining, placement under vehicles, pumps, tanks, pipes and valves. Popular in field service applications.

Internal Length (m)

Custom sizing available

Internal Width (m)

Custom sizing available

Wall Height

🔒 100 mm (fixed)

Memory foam sidewalls

Enter dimensions above to check compliance.

◯ Awaiting Input

📐 Estimated capacity: —

This bund will be used outdoors or on rough / uneven ground

🌧️ Outdoor use considerations: For outdoor applications, additional bund capacity may be required to account for rainfall accumulation. A SpillSmart Ground Sheet is strongly recommended under the bund to protect the base from rocks, gravel and debris — especially for Drill Rig Bunds deployed in remote field environments.

4

Select Your Fabric.

Tell us what you're storing and we'll highlight the right material

What type of liquid are you storing?

Fuels, Oils & Hydrocarbons

Diesel, petrol, hydraulic fluid, lubricants, crude oil

Broad Chemicals & Solvents

Coolants, alcohols, solvents, surfactants, mixed chemicals

Acids, Bases & Corrosives

Strong acids (pH<4), caustics, bleach, electroplating chemicals

Water, Washwater & Non-Aggressive Liquids

Wash bays, general washdown, rainwater, mild detergents

Select Fabric

PVC

900 gsm · Safety Yellow · UV Stable

Heavy duty UV-stabilised PVC. The versatile workhorse for the majority of industrial containment applications. Easy to clean and highly durable.

Best For: Fuels, oils, diesel, hydraulic fluids, general industrial liquids, wash bays.

ES-B-SB-PVC

✓

Elvaloy

Heavy Duty · Gloss Black · Chemical Grade

Premium Elvaloy fabric engineered for robust chemical applications. Handles hydrocarbons and a broad range of chemicals where standard PVC may degrade over time.

Best For: Hydrocarbons, solvents, coolants, mixed chemical storage, demanding environments.

ES-B-SB-ELV

✓

Not sure? Our team can advise on the correct fabric for your specific chemical. Include the chemical name or SDS reference in the notes on your enquiry.

5

Accessories.

Optional — add to your enquiry if required

Ground Sheet

Protects the bund base from puncture damage caused by gravel, rocks, sticks and site debris. Available in Light Duty (270gsm Geo) or Heavy Duty (520gsm Geo with PVC backing). Essential for Drill Rig Bunds deployed on remote or uneven ground.

ES-B-GS-H-GEO / ES-B-GS-H-GPVC / ES-GS-H-PVC

Bund Repair Kit

Minimise downtime with on-site repair capability. Includes absorbent cloth, EnviroWash cleaner, FTL30 repair roll, BondSmart repair glue, seam roller and application brush. Available for PVC and Elvaloy fabrics — specify when ordering.

ES-B-REPAIR-PVC / ES-B-REPAIR-ELV

Bund Plug Kit

DIY drain solution for PVC bunds. Allows quick and clean draining of accumulated liquid from wash bays or outdoor applications — great for SpillBunds used in wash bay scenarios. Includes marking pen, Stanley knife, Bund Plug & Cap and BondSmart repair glue.

ES-B-PLUG

12V Bund Pump

Portable 12V automatic pump ideal for evacuating accumulated liquid from bunds in the field. Auto start/stop paddle float switch — operates at water levels as low as 60mm. Can pump through an Oil & Water Separator Filter Bag. Battery not included.

ES-B-PU-12V

Drain Warden

Highly effective stormwater drain insert — filters hydrocarbons, silt, oil and pollutants as water passes through. Ideal when a SpillBund is used as a portable wash bay and washdown water needs to be directed to a drain. Available in standard sizes or custom made.

ES-DW-600 / ES-DW-900 / ES-DW-1200 / ES-DW-2400

Oil & Water Separator Filter Bag

Disposable filter bag that allows untreated washdown water to pass through while capturing sediment and hydrocarbons. Pairs with the 12V Bund Pump for compliant liquid disposal on site. Available in Small, Medium and Large.

ES-FB-OWS-SR / ES-FB-OWS-MR / ES-FB-OWS-LR

6

Send Your Enquiry.

Your calculator results are included automatically — nothing to re-enter

Your Configuration Summary

Bund Type Not selected

Required Capacity (AS1940) Not calculated

Bund Dimensions Not entered

Bund Capacity Not calculated

AS1940 Compliance —

Fabric Selected Not selected

Accessories None

First Name *

Last Name *

Company / Organisation

Phone or Mobile

Email Address *

State / Territory

Additional Notes

🔒 Your details are used only to respond to this enquiry and connect you with a suitable Envirosmart reseller. We will never share your information with third parties for marketing purposes.

📧 Clicking Send Enquiry will open your email app with all your calculator results pre-filled and ready to send to [email protected].

View Product Info ↗

SpillBund & Drill Rig BundCapacity Calculator.

AS1940 Secondary Containment Requirement

Your Configuration Summary

SpillBund & Drill Rig Bund
Capacity Calculator.