Quality Assurance

The Neches Compost Facility (NCF) is regulated by the Texas Commission on Environmental Quality, under the authority of the Texas Administrative Code, Title 30, Chapters 312 and 332. These regulations mandate the operating conditions of a compost facility as well as a testing regime that includes the analysis of fecal coliform and Heavy metals.

NCF became a member of the US Composting Council, an organization for the further development of recycling through composting, in 2004 in an effort to help standardize the biosolid compost industry. As a Result, NCF is an active participant in their Seal of Testing Assurance (STA) Program. This program establishes sampling criteria for testing that goes beyond those required by State and Federal Regulatory agencies. This program prescribes the frequency of analysis based on production quantities. The program also prescribes parameters such as nutrients, compost stability, compost maturity, germination, pH, moisture content, salinity, and particle size.

NCF has certified it's product lines through the STA program. This certification allows NCF to produce a product that can be utilized by the Texas Department of Transportation (TxDOT) as part of their normal maintenance routines as well as new construction.

NCF Biosolid Compost is tested for a variety of parameters to ensure quality. Our products are tested routinely for required parameters including: Fecal Coliform, Arsenic, Cadmium, Chromium, Copper, Lead, Mercury, Molybdenum, Nickel, Selenium, Zinc.

NCF Biosolid Compost products are also tested for germination and growth parameters including: Soluble Salts, pH, Maturity, Organic Matter Content, Stability, Germination, Respiration, Moisture, Dry Matter, Total Nitrogen, Phosphorus, Phosphate, Potassium, Potash, Magnesium, Calcium.

Guide For Purchasing Biosolid Compost

Typical Characteristics of Biosolid Compost

Parameter Typical Range Preferred Range
Compost Classification Class B minimum Class A
pH 5.0 - 8.5 6.0 - 8.0
Soluble Salts 1 - 10 dS less that 5 dS
Nutrient Content N 0.5 - 2.5 %
P 0.2 - 2.0 %
K 0.3 - 1.5 %
N  > 1.0 %
P  >  0.5 %
K  >  1.0 %
Moisture Content 30 - 60 % 40 - 50 %
Organic Matter Content 30 - 70 % 50 - 60 %
Particle Size 3/8" - 1-1/2" Application specific
Pathogens Must Meet 30 TAC 312.82 (a) (1) Must Meet 30 TAC 312.82 (a) (1)
Metals Must Meet 30 TAC 312.43 (b) (3) Must Meet 30 TAC 312.43 (b) (3)
Stability Stable to Highly Stable Very Stable

Analytical Results

2003 Jan                      
2004   Feb     May June         Nov  
2005 Jan   March     June July   Sept   Nov  
2006 Jan   March       July   Sept      
2007 Jan     April May       Sept   Nov  
2008 Jan   March   May   July   Sept Oct Nov  
2009 Jan   March   May   July   Sept   Nov  
2010 Jan   March   May   July   Sept   Nov  
2011 Jan   March   May     Aug   Oct   Dec
2012   Feb   April   June   Aug   Oct   Dec
2013   Feb   April   June   Aug       Dec
2014 Jan   March   May     Aug   Oct   Dec
2015   Feb   April   June   Aug       Dec
2016   Feb       June   Aug        

Herbicides & Pesticides April 2006
Herbicides & Pesticides October 2012

For additional information, e-mail questions to info@soiltherapy.org.