Sunmark Environmental was awarded a grant from Oregon Best for Oregon State University to research biochars and other materials to optimize EarthLite™ Stormwater Filter Media for removal of heavy metals, specifically Copper & Zinc.  Below are the results of the grant.

University Research Test Results:

**BENCHMARK:  Zinc 120 ug/L

EarthLite™ Stormwater Filter Media works up to 6 times longer for Zinc removal than 100% biochar. University Research

August 2015

Real stormwater was used in benchmark testing for EarthLite™ Stormwater Filter Media. University Research


Not all biochars are made for stormwater

Biochars are a broad range of materials, made from different feedstocks and under different production conditions.  Consequently, they have a wide range in properties, including their ability to remove contaminants from water. University Research


Not all biochars are the same, not even from the same feedstock as seen in the chart to the right.

Five biochars and activated carbon were assessed for zinc and copper removal using batch trials of synthetic stormwater with concentrations from 0.05 to 2 mg/L


Myles Gray

OSU logo

Faculty Research Assistant, Oregon State University

Oregon State University MS, Soil Science and Water Resources Engineering, GPA: 4.0

Dual Masters in Soil Science and Water Resources Engineering combined soil science coursework focusing on soil water with broad coursework in water resources engineering. Master’s research focused on hydraulic and hydrologic properties of biochars, specifically as they relate to water filtration and soil amendment applications.

Cornell University BS, Geological Sciences, Magna cum Laude, GPA: 3.84

Myles Gray is a stormwater researcher who focuses on the use of innovative treatment methods to remove contaminants from urban and industrial runoff.  He is currently working on a research and development project to optimize biochar-based stormwater treatment methods for removal of heavy metals from stormwater runoff to help in the early stage commercialization of this technology.  He previously worked as an environmental consultant in groundwater monitoring and remediation at petroleum impacted sites.  He holds degrees from Cornell University and Oregon State University.

Markus Kleber

OSU logo

Associate Professor, Oregon State University Soil and Environmental Geochemistry
Current Work Focus: The processes at the interface between organic matter and mineral surfaces, including mineral surface properties, organic matter properties, bonding mechanisms, adsorption processes, mineral-microbial interactions, and organic matter turnover dynamics.
OSU Campus, Department of Crop and Soil Science