(a) Biosolids.      
        (1) Bulk biosolids or biosolids sold or given away in a bag or other container shall not be land applied if the concentration of any metal in the biosolids exceeds the ceiling concentration for the metal in Table 1 of subsection (b) of this section.       
        (2) If the bulk biosolids are applied to agricultural land, forest, a public contact site, or a reclamation site, either:                  (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                   (B) the concentration of each metal in the biosolids shall not exceed the concentration for the metal in Table 3 of subsection (b) of this section.         
        (3) If bulk biosolids are applied to a lawn or a home garden, the concentration of each metal in the biosolids shall not exceed the concentration for the metal in Table 3 of subsection (b) of this section.       
        (4) If biosolids are sold or given away in a bag or other container for land application, either:                  (A) the concentration of each metal in the biosolids shall not exceed the concentration for the metal in Table 3 in subsection (b) of this section; or                   (B) the product of the concentration of each metal in the biosolids and the annual whole application rate for the biosolids 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 application rate is presented in §312.49 of this title (relating to Procedure to Determine the Annual Whole Application Rate for Biosolids and Domestic Septage).         
      (b) Metal concentrations and loading rates--biosolids.      
        (1) Ceiling concentrations.        
          Attached Graphic         
        (2) Cumulative metal loading rates.        
          Attached Graphic         
        (3) Metal concentrations.        
          Attached Graphic         
        (4) Annual metal loading rates.        
          Attached Graphic         
     Source Note:        The provisions of this §312.43 adopted to be effective October 13, 1995, 20 TexReg 7840; amended to be effective April 23, 2020, 45 TexReg 2542