Does reusing rainwater for irrigation complies with this credit's requirements? Does rainwater that is collected in a rainwater tank and then reused for irrigation, has to be also cleaned by filters that remove TSS with efficiency of 80%? Or is it enough if it will be just initially cleaned accoriding to local requirements because it won't be dischrged to the sewage system?
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Michael DeVuono
Regional Stormwater LeaderArcadis North America
LEEDuser Expert
186 thumbs up
April 16, 2014 - 7:55 am
This should comply with the credit, as it is commonly accepted that 100% of TSS is removed when capture/reuse is proposed.
Agnieszka Rylska
GO4IT SP Z OO SP K29 thumbs up
April 16, 2014 - 8:22 am
Thank you for your reply. Do you know any project that used this approach for credit documentation and had this solution accepted by GBCI? Then while filling in the credit form what shuold be selected as "Source of TSS Removal Efficiency data" if there are no filters applied? Or maybe should it be described as an alternative compliance path?
Amanda Ross
Architect, Sustainability Lead9 thumbs up
April 16, 2014 - 12:24 pm
Be careful about the type of filter you use. We used a first flush filter, which essentially took the dirtiest water at the start and it was "flushed" down into the city storm system, which resulted in all of our TSS going down the city storm (but not into the water re-use). Of course the intent of the credit is that you remove the TSS from the water going to the city storm, so this filter and our water re-use didn't do anything to address water quality. We got caught on this on our first design review, but were fortunately able to address water quality with a bioswale instead.
Alternatively, if you use a filter that captures the TSS and requires clean-out, or goes somewhere other than city storm, then you are removing TSS from city storm.
Michael DeVuono
Regional Stormwater LeaderArcadis North America
LEEDuser Expert
186 thumbs up
April 16, 2014 - 5:50 pm
I have always just designed a cistern with slightly more volume required. The thought process here is that the TSS settles out at the bottom of the cistern, and this is cleaned out during the dry season.
Depending on the means of conveyance to the cistern, you could always add a snout or something similar to ensure the bulk of your WQ occurs upstream of the cistern.
Agnieszka Rylska
GO4IT SP Z OO SP K29 thumbs up
June 14, 2017 - 7:16 am
I want to describe the water tank which collects water for irrigation as effective in 100% when it comes to TSS removal, but I have gotten confused during filling Source of TSS Removal
Efficiency data column. The possible options in the form are: state or local program (80% default), national or regional source, in-field performance monitoring, calculations and monitoring. As nothing really suites to the situation, and manual description is not possible I want to ask if you would suggest something from the available options?