1. (a) Sewage sludge.

   1. (1) Bulk sewage sludge or sewage sludge sold or given away in a bag or other container shall not be applied to the land if the concentration of any metal in the sewage sludge exceeds the ceiling concentration for the metal in Table 1 of subsection (b) of this section.

   2. (2) If the bulk sewage sludge is applied to agricultural land, forest, a public contact site, or a reclamation site, either:

      1. (A) the cumulative loading rate for each metal shall not exceed the cumulative metal loading rate for the metal in Table 2 of subsection (b) of this section; or
      2. (B) the concentration of each metal in the sewage sludge shall not exceed the concentration for the metal in Table 3 of subsection (b) of this section.
   3. (3) If bulk sewage sludge is applied to a lawn or a home garden, the concentration of each metal in the sewage sludge shall not exceed the concentration for the metal in Table 3 of subsection (b) of this section.

   4. (4) If sewage sludge is sold or given away in a bag or other container for application to the land, either:

      1. (A) the concentration of each metal in the sewage sludge shall not exceed the concentration for the metal in Table 3 in subsection (b) of this section; or
      2. (B) the product of the concentration of the each pollutant in the sewage sludge and the annual sludge application rate for the sewage sludge shall not cause the annual metal loading rate for the metal in Table 4 of subsection (b) of this section to be exceeded. The procedure used to determine the annual whole sludge application rate is presented in §312. 49 of this title (relating to Appendix A-Procedure to Determine the Annual Whole Sludge Application Rate for a Sewage Sludge).

2. (b) Metal concentrations and loading rates--sewage sludge.

   1. (1) Ceiling concentrations.
3. (c) Domestic Septage. The annual application rate for domestic septage applied to agricultural land, forest, or a reclamation site shall be equal to or less than the annual application rate calculated using equation 1. AAR = N / 0.0026, where AAR = Annual application rate in gallons per acre per 365-day period; N = Amount of nitrogen in pounds per acre per 365-day period needed by the crop or vegetation grown on the land.

Source Note:The provisions of this §312.43 adopted to be effective October 13, 1995, 20 TexReg 7840.