Hazardous Waste Management System; Testing and Monitoring Activities

The Environmental Protection Agency (EPA or Agency) is amending its hazardous waste regulations under subtitle C of the Resource Conservation and Recovery Act (RCRA) for testing and monitoring activities. This amendment clarifies the temperature requirement for pH measurements of highly alkaline wastes and adds Method 9040B (pH Electrometric Measurement) and Method 9045C (Soil and Waste pH) to ``Test Methods for Evaluating Solid Waste, Physical/ Chemical Methods,'' EPA Publication SW-846. This amendment will provide a better and more complete analytical technology for RCRA testing in support of hazardous waste identification under the corrosivity characteristic (40 CFR 261.22).