USCC STA Compost Test
STA Certified Compost Testing Package
Our STA Certified Compost Testing Package is tailored for composters registered with the US Composting Council (USCC). This comprehensive test ensures that your compost meets the stringent requirements of the STA Program, providing you with the data needed to certify and optimize your product. Regular testing is essential for manufacturers to maintain compliance and produce high-quality compost products.
What is STA Certified Compost?
Compost is defined as the product of controlled aerobic, biological decomposition of biodegradable materials. This process reduces the viability of pathogens and weed seeds (per EPA 40 CFR 503 standards) and stabilizes the carbon, making the compost beneficial for plant growth. STA Certified Compost is screened to improve its application as a soil amendment and may also contribute essential plant nutrients.
Related and Allowable Products:
The STA Program covers a variety of compost-related products:
- Vermicompost/Worm Castings: Made from pre-composted feedstocks that meet EPA 40 CFR 503 standards.
- Digested Solids: Anaerobically digested materials composted post-digestion.
- Composted Mulch: Coarser composted material, often used as a surface mulch.
- Erosion Control Compost: Specialized compost for erosion control applications.
- Soil Remediation/Stormwater Management Compost: Used in environmental and stormwater management applications.
For more information on STA Program requirements, visit the STA Program Requirements page.
Why Frequent Testing is Key
Compost is a dynamic product that evolves over time. Regular testing ensures consistency, quality, and compliance:
- Monthly Testing: For manufacturers producing over 17,501 wet tons/year.
- Bi-Monthly Testing: For manufacturers producing 6,201 to 17,500 wet tons/year.
- Quarterly Testing: For manufacturers producing under 6,200 wet tons/year.
Parameters Tested:
Our testing package covers a comprehensive range of parameters to provide detailed insights into your compost's quality and compliance:
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| Moisture | % Organic Matter | Total Nitrogen | Nitrate Nitrogen |
| Total Phosphorus | Total Potassium | Total Calcium | Total Magnesium |
| Total Sodium | Total Iron | Total Copper, | Total Manganese |
| Total Zinc | Sulfate as SO4 | Boron | Chloride |
| Ammonia (NH4-N) | pH | C:N | Germination |
| Carbon Dioxide Evolution | Particle Size | Fecal Coliform | Total Coliform |
| Conductivity |
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| Heavy Metals: | Lead | Molybdenum | Zinc |
| Cadmium | Copper | Selenium | Arsenic |
| Mercury | Nickel | Chromium |
Pathogen Testing: Manufacturers must meet pathogen limits for STA Certification:
- Fecal Coliform:< 1000 MPN/gram of dry compost.
- Salmonella:< 3 MPN/4 grams of dry compost (both tests are required in California).
Sample Submission Guidelines:
- Sample Size Required: Two 1-gallon Ziploc bags.
- Shipping Instructions: Ship samples overnight in an insulated container with ice packs to ensure integrity.
Additional Information:
- Turnaround Time: 14 business days.
- Comprehensive Results: Includes detailed analysis and compliance data for STA certification.
Why Choose This Test?
This package is specifically designed to help compost manufacturers meet USCC STA certification standards. With detailed testing for nutrients, contaminants, and pathogens, this analysis ensures your product complies with regulatory requirements while maintaining the highest quality. Regular testing helps you stay ahead of changes in your compost and ensures it performs as expected in various applications.
Order your STA Certified Compost Testing Package today to ensure your compost meets the highest industry standards!
Frequently Asked Questions
- What are your business hours?
Our office is open Monday thru Friday from 8 am to 5 pm. We do close for major holidays, so we recommend ordering your testing and sending your sample early if a holiday is coming up. You can always reach us by email. Just send us a message at info@tpslab.com
- When will I get my results?
We understand that you need your results as soon as possible. That is why we make sure to begin processing your samples as soon as they arrive at our laboratory. When the results are ready, we will email them to the email address you provided on your submittal form. The list below will give you an idea of our usual turnaround times.
Soil Tests: 5-7 Business days
Water Tests: 5 - 7 Business days
Plants Tests: 24 - 48 Hours
Compost Tests: 7 - 14 Business days
Fertilizer Tests: 3 - 5 Business days
Heavy Metals Test: 7 - 14 Business days
We offer a rush option for an additional 50% of the testing cost, but we would encourage you to give yourself time to test before you get to a point where a rush is needed.
