Using STA Certified Compost – Directions for Use and Specifications: State Department of Transportation (DOT) Specifications

Specifying STA Certified Compost DOTs across the country have shown their confidence in the efficacy of the Seal of Testing Assurance program’s STA Certified Compost products by requiring its use on projects under their jurisdiction. The US Composting Council’s Seal of Testing Assurance Program “STA” is a compost testing, labeling and information disclosure program designed to give…

Read More

Using STA Certified Compost – Manufacturer Requirements: Sources to Buy

Country Oaks – Burton Facility, MI Product – Grade A Compost, Tested once every three months www.countryoakslandscapesupply.com 3218 E Atherton Road Burton, Michigan 48529 Contact – Mark Cherry mccherry5150@yahoo.com (810) 743‐1920 Hammond Farms, Inc. – Hammond Farms Landscape Supply, MI  Product – Pro‐Gro, Tested once every three months www.hammondfarms.com 5834 N. Michigan Rd. Dimondale, Michigan 48821 Contact – Cliff…

Read More

Using STA Certified Compost – Manufacturer Requirements – Passing Test Results

STA Certified Compost – Test Result Limits for Compost Manufacturers STA Certified Compost participants must meet the EPA testing limits for heavy metals AND pathogens in every CTDS (Compost Technical Data Sheet) for every STA Certified Compost product. METALS – maximum concentrations expressed on a dry weight basis (Chromium and Molybdenum do not have EPA limits) Arsenic (As) 41…

Read More

Using STA Certified Compost – Manufacturer Requirements: Test Results

Understanding Compost Technical Data Sheets Since growing conditions and plant requirements vary, compost users can benefit from information that accurately characterizes the compost products they use. This data can help you to improve the way you use compost to best meet your particular needs and to fit your specific situation. Fortunately, all STA Certified Compost…

Read More

Using STA Certified Compost – Program Foundation: Lab Oversight

The Compost Research and Education Foundation www.compostfoundation.org Research Supporting scientific research is a core focus of the CREF mission.  Here are some of the most current research projects and upcoming future project areas from the Foundation: Soluble Salts This literature review looks at the issue of soluble salts with the goal of beginning a dialogue…

Read More