Bioretention Soil Suppliers
This page includes suppliers and/or vendors currently known to meet the qualifications in the City of Seattle’s Standard Specifications for the following bioretention soil media components and blending. The City will add to this list as more vendors demonstrate ability to meet qualifications.
To be considered as a supplier for any of the items below, please read the specification to ensure your product complies and then contact Greg.Stevens@seattle.gov.
Bioretention Soil, Type HP and Bioretention Polishing Media Blending
Walrath Landscape Supply
11405 24th Avenue E
Tacoma, WA 98445
Contact: Greg Miller
(253) 531-7499
greg@tewalrath.com
Coconut Coir Fiber
Cocogro Coir Fiber produced by Botanicare
3204 NW 38th Circle
Vancouver, WA 98660
(888) 478-6544
botanicare.com/products/cocogro
Biochar
- PD 100+mesh biochar from Biological Carbon, LLC
Philomath, OR
Contact: John Miedema
(541) 619-0007. - Biochar Supreme, Inc.
PO BOX 859
Everson, WA 98247
(360) 927-9974
biocharsupreme.com - Stormwater Biochar
(503) 789-6760
stormwaterbiochar.com
Activated Alumina
- Actiguard F (14 x 28 Mesh) from Axens Canada Specialty Aluminas, Inc.
4000 Development Drive
Brockville, Ontario
K6V 5V5 Canada
(613) 342-7462
www.axens.net/solutions/catalysts-adsorbents-grading-supply/drying-series-adsorbents - BASF CPN Activated Alumina (14 x 28 Mesh) from BASF Catalysts, LLC
101 Wood Avenue
Iselin, NJ 08830-0770
(732) 205-5000
chemical-catalysts-and-adsorbents.basf.com/global/en/adsorbents
Iron Aggregate
“ETI CC-1004” from Connelly-GPM, Inc.
3154 S. California Avenue
Chicago, IL 60608-5176
(773) 247-7231
connellygpm.com/zero-valent-iron
Learn more about Green Stormwater Infrastructure at Seattle Public Utilities.