Commercial Rainwater Harvesting, Rainwater Catchment, Technical Information

Meeting the 2016 Seattle Stormwater Code

seattle-1027254_640The new Seattle 2016 stormwater code, effective Jan 1, 2016 addresses stormwater regulations in order to protect people, property, and the environment from damage caused by stormwater runoff. Drainage control, flow control and stormwater treatment, and “On Site Stormwater Management”,  are key factors in what you can and cannot do with runoff caused by impervious surfaces. The new code satisfies Seattle’s obligation to be in compliance with the Municipal Stormwater Discharge National Pollutant Discharge Elimination System (NPDES) Permit, issued by the Washington State Department of Ecology.

The city of Seattle has put out new publication of “Best Management Practices.” The Primary purpose of the BMPs is to protect beneficial uses of water resources, while reducing erosion, and contamination of stormwater runoff entering our waterways. Collecting rainwater for beneficial use can have a significant effect meeting the requirements of the new stormwater codes on any new construction within city limits. Collecting the rain and using it reduces the impervious surface of your project. Whether its use is for irrigation, toilet flushing, laundry facility, or potable use for residential, adding rainwater collection to your project’s design can be the answer to “what do I do with the runoff to meet these challenges?”, to comply with the new stormwater code.”

Contain Water Systems Inc. and RainBank Rainwater Systems can help your Seattle building project meet the 2016 stormwater code requirements.

Contain Steel  Water Tanks can be an integral part of design for commercial construction in reducing costs due to the new code and its requirements. RainBank Rainwater Systems has been designing and installing systems for more than 15 years in Washington State. Whether your project is commercial or residential, potable or non potable, RainBank and Contain have the answers for your next project. We work closely with architects, engineers, contractors, and most importantly, the customer to help meet the new stormwater codes with a knowledgeable staff and commitment of your project.

Rainwater Catchment

Turkish Bath Becomes Rainwater Collection Cistern

mosaic-200864_640With a little bit of creative thought, Tacoma, WA set out on a path of  green capability while reclaiming a downtown area that had become degraded and mostly abandoned – partly using a Turkish bath.

In an article from Environmental Protection Online, we learn how the city of Tacoma repurposed  Park Plaza South. During the reconstruction, an old Turkish Bath was uncovered. Cleverly, the designers decided to use the old bath as a rainwater collection cistern, which would collect water to be used for irrigation and toilet flushing.

“Other sustainable features at Pacific Plaza include 36 percent of the building materials being recycled, from structural steel and panel metal sidings to wood and windows. All of the products used met LEED (Leadership in Energy and Environmental Design) thresholds for low-emitting materials, while interior materials such as carpet, flooring, paint, and composite woods had low levels of volatile organic compounds.

These features, along with the rainwater collection system, earned the building a NAIOP Sustainable Development Award and LEED Platinum certification from the U.S. Green Building Council. While the Platinum certification was the city’s first, there now are more than 25 local businesses, schools, or housing complexes that are silver or better LEED-Certified in Tacoma, with many more in the works.”

Read more at Recycling the Past to Build the Future
How-to, Rainwater Catchment

Rainwater Collection in Washington State: Where to Begin?

gutter-484684_640We want to keep our families safe, but when we read stories about sustainability, water conservation, saving the environment, aging infrastructure, even poisoned public water systems – how on earth are we supposed to know where to begin when it comes to rainwater collection?

Here are some tips that can help you decide where to begin. We originally discussed this in a post from 2014:

Whether you are designing your own rainwater catchment system or having one designed by a professional, success of your rainwater catchment system design is dependent on some key factors.

What do I want to accomplish with my design of a rainwater catchment system?

Irrigation, toilet and or laundry facility, supplementary to well water or city water, whole house usage, and sole source are the main purpose of designs.

How much rainwater can I collect from my roof? Will it be enough to supply my needs?

One inch of rainfall per 1,000 square feet of roof will yield approximately 623 gallons of water. Evaporation, wind, and spillage account for 15 – 20 % of loss. A 2,000 square foot roof with 36″ of annual rainfall may yield 44,856 gallons. With an efficiency of 85%, that equals 38,128 gallons.

One inch of rain is needed for the healthy growth of plants. This equates to .623 gallons per week for 1 square foot of planting, which can add up rather fast, so keeping your irrigation needs small and giving consideration to drought tolerant plants is recommended.

Toilet and laundry facilities account for 49% of household usage. Designing and building a system for this purpose alone can cut your water and sewer bill in half. New construction is the best time to implement this type of system however, retrofitting plumbing in an existing home can be accomplished.

Rainwater Catchment System Key FactorsIf the collection area is small or available space for storage is restricted, a supplementary system can be achieved with “slim line” style of cisterns or buried tanks. A small roof can still be effective in collection if used for a supplementary source to well water or city water.

Whole house usage, or potable water, can eliminate dependency on city water or well water, where you can still have city or well water as a back up during dry times. With the advanced filtration and UV disinfection offered today, safe, reliable drinking water for whole house usage will exceed the quality of most well and city water.

Now that you are considering what usage of collected rainfall would best suit your needs, we will discuss sizing, configuration, implementation, and maintenance of a designed rainwater catchment system in upcoming posts.

When you are ready to begin, RainBank will come to your site, discuss your needs and prepare a feasibility study – customized to your usage. There is a fee for this, which would be discounted from the cost when you contract with us to design or build your system. Use the form below to request a quote.

Rainwater Systems