Judy, J. D., M. L. Silveira, S. Agyin-Birikorang, and G. A. O’Connor. “Are Alum-Based Drinking Water Treatment Residuals Safe for Land Application? SL 299/SS512, Rev. 6/2019”. EDIS, vol. 2019, Aug. 2019, p. 8, doi:10.32473/edis-ss512-2019.