*Chambers must be certified to [http://shop.csa.ca/en/canada/plumbing-products-and-materials/b184-series-11-r2015/invt/27032382011 CSA B184 SERIES-11 (R2015)] "Polymeric subsurface stormwater management structures". | *Chambers must be certified to [http://shop.csa.ca/en/canada/plumbing-products-and-materials/b184-series-11-r2015/invt/27032382011 CSA B184 SERIES-11 (R2015)] "Polymeric subsurface stormwater management structures". |