(a) Representative samples of sewage sludge, biosolids, domestic septage, or water treatment residuals that are land applied or placed on a surface disposal site shall be collected and analyzed.
(b) Representative samples of sewage sludge or biosolids fired in an incinerator shall be collected and analyzed.
(c) The following methods, other methods as approved by the executive director, or the latest revision shall be used to analyze samples of sewage sludge, biosolids, water treatment residuals, or domestic septage.
  (1) Enteric viruses, ASTM Method D 4994-89, "Standard Practice for Recovery of Viruses From Wastewater Sludge," Annual Book of ASTM Standards: Section 11, Water and Environmental Technology, 1992.
  (2) Fecal coliform, Part 9221 E or Part 9222 D, "Standard Methods for the Examination of Water and Wastewater," 18th edition, American Public Health Association, Washington, D.C., 1992.
  (3) Helminth ova, Yanko, W.A., "Occurrence of Pathogens in Distribution and Marketing Municipal Sludges," EPA 600/1-87-014, 1987. NTIS PB 88-154273/AS, National Technical Information Service, Springfield, Virginia.
  (4) Inorganic pollutants, Method SW-846 in "Test Methods for Evaluating Solid Waste," United States Environmental Protection Agency, November 1986.
  (5) Salmonella sp. bacteria, Part 9260 D.1, "Standard Methods for the Examination of Water and Wastewater," 18th edition, American Public Health Association, Washington, D.C., 1992.
  (6) Specific oxygen uptake rate, Part 2710 B. "Standard Methods for the Examination of Water and Wastewater," 18th edition, American Public Health Association, Washington, D.C., 1992.
  (7) Total solids, fixed solids, and volatile solids, Part 2540 G, "Standard Methods for the Examination of Water and Wastewater," 18th edition, American Public Health Association, Washington, D.C., 1992.
  (8) Percent volatile solids reduction shall be calculated using a procedure in "Environmental Regulations and Technology--Control of Pathogens and Vectors in Sewage Sludge," EPA-625/R-92/013, U.S. Environmental Protection Agency, Cincinnati, Ohio, 1992.
  (9) Polychlorinated Biphenyls (PCBs), SW-846, Test Method 8082A, United States Environmental Protection Agency, current edition.

Source Note: The provisions of this §312.7 adopted to be effective October 13, 1995, 20 TexReg 7840; amended to be effective April 23, 2020, 45 TexReg 2542