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D6249-19 – Standard Test Method Technical Guide
🎯 Significance and Use
This guide assists operators of power plants and wastewater treatment facilities in managing alkaline by-products and biosolids. It outlines tests, procedures, and parameters to significantly reduce pathogens through alkaline stabilization, ensuring compliance with federal regulations such as 40 CFR Part 503 (effective March 22, 1993). The values stated in SI units are to be regarded as standard. This international standard was developed in accordance with internationally recognized principles on standardization.
🧪 Alkaline Materials and Testing
Key reactive alkaline materials include quicklime, hydrated lime, and high lime fly ash. Chemical composition is evaluated via the Available Lime Index (ALI) using the optional chemical test of Table 1 in the standard. ASTM C25 provides methods for chemical analysis, while ASTM C110 covers physical testing for reactivity and particle size. The table below summarizes standard testing methods:
| 🟦 Parameter | 📏 Test Method | 🎯 Application |
|---|---|---|
| Available Lime Index | ASTM C25 | Chemical analysis of alkaline content for stabilization |
| Physical Properties | ASTM C110 | Assesses reactivity, particle size, and uniformity |
Additional chemical components may be determined as requested by the purchaser. Reactivity of these materials is critical for effective pathogen reduction.
⚖️ Regulatory Compliance and Process Implementation
The guide supports compliance with 40 CFR Part 503 (Final Rules, 58 FR 9248-9404) for biosolids use or disposal. Processes to Further Reduce Pathogens (PFRP) and Significantly Reduce Pathogens (PSRP) correspond to Class A and Class B requirements, respectively, defined by operating parameters such as time and temperature. State permits may impose additional requirements. The table below outlines key regulatory references:
| 🟦 Regulation | 📏 Scope | ⚡ Key Requirement |
|---|---|---|
| 40 CFR Part 503 | Federal | Standards for use or disposal of sewage sludge |
| State Permits | State-specific | Additional treatment or disposal rules |
💡 Tip: Always refer to the latest USEPA guidance documents for detailed criteria on PFRP and PSRP to ensure proper treatment process design and compliance.
⚠️ Warning: This guide does not address all safety concerns. Users must establish appropriate safety and health practices and determine regulatory limitations before use (Section 1.4).
❓ Frequently Asked Questions
🔍 What is the purpose of ASTM D6249-19?
It provides guidance for using reactive alkaline materials to treat wastewater residuals, reducing pathogen levels to achieve compliance with 40 CFR Part 503 for Class A or Class B biosolids.
💡 Who should use this guide?
Operators of power plants producing alkaline by-products and wastewater treatment plant operators managing biosolids will find it helpful for stabilization and regulatory compliance.
⚡ What are PFRP and PSRP?
Processes to Further Reduce Pathogens (PFRP) and Processes to Significantly Reduce Pathogens (PSRP) are