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Manufacturing Process For Stormwater Treatment Systems Tanks built tough: strength & durability you can rely on Each tank is constructed with a single piece design to prevent breakages and leaks within the internal walls. Using specially designed steel moulds ensures consistency in our production. After every pour, our moulds are carefully inspected, cleaned and prepared for the next use. To reinforce the concrete, we use 665 steel mesh and extra reinforcement for the lifting points. This internal mesh is centrally positioned to add strength to the structure and meets the requirements of AS/NZS1546.1:2008, ensuring a minimum concrete cover over reinforcement. Although more labour intensive, this ensures a more durable structure than commonly used fibre concrete. Readymix concrete is poured into the moulds and externally vibrated to ensure all voids are filled and excess air is removed. Once cured, the concrete in our tanks has a strength of 45mpa, twice the strength of a house foundation! After the pour is complete, the moulds are covered and steamed overnight for optimal curing. Once the concrete is cured, the moulds are rotated, unclamped and lifted off the tank. Our skilled team assembles the required quality components and completes the internal fit out of the system. We pour the tank lids separately, these are placed on top of the tank bodies and sealed along the joins. A bead of sealant is applied prior to an epoxy mix to minimise the chance of leaking as much as possible. Before being sent to their new homes, each completed system undergoes a thorough Quality Assurance process. Want to know more? Contact our team today! 0800 287 846 sales@austinbluewater.co.nz

Resources Here you will find all brochures, warranty documents, user manuals, care guides, installation instructions, system dimensions, technical documents etc. If you have any questions or can't find what you're looking for please do get in touch with us. Brochures Click on the brochures below to view, or download as a pdf. Austin Stormwater Stormwater Systems Brochure Austin Bluewater Oil & Grit Interceptor Brochure Warranty Document, User Manuals & Care Information Click on the documents below to view, or download as a pdf. Austin Bluewater Standard Warranty System & Technical Specifications and Installation Guides Click on the documents below to view, or download as a pdf. Austin Bluewater Standard Tank Specifications and Excavation/Installation Instructions PerkFilter™ Media Filtration Model PFV-18 Concrete Stormwater Detention Tanks Model SW10 Model SW20 Model SW65 Note: HD lids and drawings are available on request Stormwater Pumping Stations PC1500V: Vortex Pump Chamber 1,500 litre (Concrete Construction) PE PCV 1300: Vortex Pump Chamber 1,300 litre (Polyethylene Construction) Oil & Grit Interceptors OG15: Oil & Grit Interceptor 1,500 litre OG15HD: Oil & Grit Interceptor 1,500 litre OG33: Oil & Grit Interceptor 3,300 litre OG33 150 PVC: Oil & Grit Interceptor 3,300 litre with 150mm Pipework OG65: Oil & Grit Interceptor 6,500 litre

PerkFilter™ Media Filtration Cartridge filtration proven to remove and retain the toughest pollutants from stormwater runoff. PerkFilter™ Media Filtration systems capture and retain suspended soils, metals, nutrients, petroleum hydrocarbons, and other target constituents from stormwater runoff to significantly reduce the total pollutant discharge load. PerkFilter is available in a wide variety of configurations to meet site specific requirements. Examples include: Catch Basins Manholes Vaults Typical installation locations include: In-line storm drain New drop inlets of vaults in commercial or residential developments Industrial applications Pre- or post-treatment for retention/detention systems Get in touch with our sales team today and they can talk you through your options specifically suited to your needs. Click here for technical resources Want to know more? Contact our team today! 0800 287 846 sales@austinbluewater.co.nz

Oil & Grit Interceptors We have a range of engineered systems suitable for your commercial entity. Below is an introduction to the different systems, how they work and what you can expect. If you have any queries, just pick up the phone and give us a call, or send us an email. We are always very happy to help. Oil & Grit Interceptors are the technical solution for the separation of oil and grit from stormwater runoff at fuel stations, car parks, commercial spaces, contracting environments and industrial wash down bays. The interceptor uses gravitational force and varying densities of oil and water to remove oil from drainage. Oil and grit interceptors are an effective and simple solution to separate and store grits and all types of oils from lightly contaminated stormwater and wash-down water. They are required for the separation of heavy solids (sand & grit) and floating hydrocarbons from storm water or wash down areas. They are typically used in industrial and commercial applications where there is potential risk for contamination from hydrocarbon products into waterways. The multi chambered treatment tank is installed close to the collection point (to ensure the oil reaches the interceptor before it emulsifies or pollutes the area) allowing for the stormwater / wash down water to flow into the settlement chambers prior to entering a storm water lateral or disposal system. Features… Multi-chambered tank design - engineered for effective grit and oil separation Watertight construction of tank preventing water ingress Manufactured using steel reinforced 45mpa commercial strength concrete Robust design for commercial applications Swift lift anchors to ensure easy manoeuvrability and cartage Option to customise design to suit the application Options for cast iron manhole covers Customised options for inlet and outlet pipework Engineered designs for heavy duty traffic loading Best suited to… The Austin Stormwater Oil & Grit Interceptor can be used in the following applications: Driveways Loading bays Small sealed carparks Commercial carwash facilities Wash down bays Depots or terminals Pre-treatment to a retention tank or pond Industrial yards Approved Standards Built to NZS 3109, Concrete Construction New Zealand Standard Download the brochure Oil & Grit Interceptors Technical Specifications Brochure Click here for technical resources Want to know more? Contact our team today! 0800 287 846 sales@austinstormwater.co.nz

Environmentally-friendly stormwater systems Specialists in stormwater treatment systems for New Zealanders. Stormwater Solutions Our stormwater systems are suitable for a wide range of project requirements and can be installed on any terrain, including hillsides and hard to access areas. Do you have a project in mind? Contact our team today. PerkFilter™ Media Filtration Learn More Oil & Grit Interceptors Learn More Stormwater Pumping Stations Learn More Concrete Stormwater Detention Tanks Learn More Polyethylene Stormwater Detention Tanks Learn More Sand Filter Stormwater Treatment Learn More Want to know more? Contact our team today! 0800 287 846 sales@austinstormwater.co.nz Quality, reliability and innovation are the pillars of our success Why Austin Stormwater? Austin Stormwater is a division of Austin Bluewater. For over 30 years, we've led the charge in designing and manufacturing top-notch stormwater and wastewater treatment systems. Our Director, Lew Austin even introduced the first advanced wastewater management system to New Zealand in 1990. We offer a comprehensive range of eco-friendly options for both residential and commercial purposes. Our units boast significant benefits such as simplicity, reliability, lower investment costs, and dramatically lower power consumption — all without the use of chemicals. We take quality seriously - that's why all our products are made in-house to meet the strict standards of various Environmental Protection Agencies. Learn more Our Manufacturing Process Our History & The Team Want to know more? Contact our team today! 0800 287 846 sales@austinstormwater.co.nz

About Us Austin Stormwater is a division of Austin Bluewater Environmental Concepts Ltd – a proven leader with over 30 years hands-on experience designing and manufacturing stormwater and wastewater treatment systems, in New Zealand, for New Zealand. Austin Bluewater Environmental Concepts is a leading manufacturer of specialised products including treatment systems, septic tanks, water storage tanks, pump stations, grease traps and oil & grit interceptors. Our company’s founder and director Lew Austin, is the innovator of Aerobic Wastewater Treatment Systems in New Zealand and still plays an active role in the direction and supervision of the business. As a business, we actively seek to develop, improve and refine all aspects of our products and manufacturing processes. Respect and care for the environment is our motivation to continue to develop and enhance the treatment of stormwater and wastewater. Our products are designed, manufactured and assembled at our own manufacturing facility to ensure consistent quality and durability. Contact the Team Lew Austin Founder 03 595 2812 or 021 356 736 lew@austinbluewater.co .nz Melissa Austin Service Manager 03 595 2812 or 021 265 7871 melissa@austinbluewat er.co.nz Julie Robinson Branch Manager 03 595 2812 julie@austinbl uewater.co.nz Graeme Langley Sales & Service 03 595 2812 or 027 607 4961 graeme@austinbluewater.co.nz Steve Roche Business Manager 03 595 2812 or 021 989 651 steve@austinbluewater .co.nz Beth Roche Wastewater Design & Consents Planner 03 595 2812 or 021 989 630 beth@aus tinbluewater.co.nz David Freer Service Technician 03 595 2812

Contact We're here to help 20 Illinois Drive, Rolleston 7614 PO Box 16865, Hornby, Christchurch 8441 0800 287 846  or 03 595 2812 sales@austinstormwater.co.nz First Name Last Name Email Phone Message Send Thanks, we'll be in touch!

Sand Filter Stormwater Treatment Capture pollutants from stormwater runoff Stormwater separating and filtration vaults and products are ideal for runoff from high density urban and industrial developments. The sand filtration process collects a range of pollutants, including oils, nutrients, sediments and heavy metals. In the stormwater management market, precast sand traps are the answer to unique filtering requirements. Precast sand traps, also known as sand filters, capture sediments from runoff water, solve particle separation problems, and lower phosphate levels. These vaults contain two chambers, one for filtering large debris and particulates and another that contains the sand to filter contaminants from the water itself, including emulsified liquids. The sand filter is typically situated between a collection structure and water piping. Each filter can be sized to match your application, thereby making processing and maintaining more efficient. Sand filters are available in a variety of sizes and feature a high-flow bypass to comply with underground structure requirements. Get in touch with our sales team today and they can talk you through your options specifically suited to your needs. Want to know more? Contact our team today! 0800 287 846 sales@austinbluewater.co.nz

Concrete Stormwater Detention Tanks Durable storage tanks built to last against fire, rust & algae Our holding and storage tanks are specifically designed and manufactured for multiple purposes including stormwater detention, water storage, wastewater collection, fire fighting protection, and industrial use. Tanks are designed to be installed above and below ground providing a cool, clear and healthy water supply. They are designed to withstand fire, rust and algae growth Concrete storage tanks are impervious to damaging ultraviolet sun rays, and are non-toxic providing a cool, dark environment for water storage. Get in touch with our sales team today and they can talk you through your options specifically suited to your needs. Click here for technical resources Want to know more? Contact our team today! 0800 287 846 sales@austinbluewater.co.nz Polyethylene Stormwater Detention Tanks Lightweight, yet durable, storage tanks Polyethylene underground stormwater tanks are suitable alternative to concrete tanks, for the retention or detention of stormwater or as a pump chamber. The poly (plastic) detention tanks are fully tested and designed to withstand ground and water pressure at depth. Stormwater retention, detention Suitable to be installed under driveways, footpaths, car parks, forecourts and much more Lightweight and easy to manoeuvre on difficult sites Save time and money with multiple inlet/outlet plumbing ports Vehicular Traffic Tested Non Vehicular Traffic - Tanks in non-critical areas can be placed at any depth that is required The tanks have been designed to be flexible for the majority of New Zealand’s soil types and water table conditions. They have been built to be easily installed under your lawn or concrete depending on the needs of your site. The tank is not reliant on surrounding soil structures for strength. Looking for pump stations? Go to Pump Stations & Pumps

Stormwater Pumping Stations We'll help you select the right pump station for your needs Austin Stormwater supply, design, and manufacture a wide range of pump units and packaged pump stations tailored to your stormwater requirements. Our expertise includes the ability to manufacture bespoke systems, including polyethylene solutions, to suit specific situations. Pump stations are available in both concrete (for strength and durability) and polyethylene (lightweight for ease of transport and installation). In addition, we offer a comprehensive range of tanks, pumps, and controllers to meet most applications and can source other components as needed. Our solutions are built to be durable and reliable, ensuring optimal performance for stormwater pumps and pump stations. Get in touch with our sales team today and they can talk you through your options specifically suited to your needs. Click here for technical resources Want to know more? Contact our team today! 0800 287 846 sales@austinbluewater.co.nz