We utilize the composting guidelines established in the National Organic standards. Our process begins with testing the raw ingredients to establish carbon to nitrogen ratios and calculate the additional carbon needed to reach our target of 30:1 using a spreadsheet developed by Tom Richard of Cornell University. To maintain a consistent product we try to always add the same type of carbon material.
The standards require that when using an in-vessel process the temperature of the material must reach 131 degrees for at least three days. We use that as a baseline and do not sell any product that does not meet that requirement. Generally we exceed the time and temperature requirements. Our goal is to continuously operate at or near 140 degrees and process the material for four to seven days.
As the composted material is unloaded from the vessel it is screened through a 1/2" rotating screen and moved to storage bays. We continue to turn the compost as needed while in storage. Nutrient analysis is performed on each batch of material processed and samples are also taken and performed by the Fertilizer Control Services on a random basis. Other tests are performed as needed, such as heavy metals, moisture, pH, etc.