1. (a) A person who prepares the water treatment residuals for land application shall retain the sample results demonstrating compliance with Table 1 of §312.43(b)(1) of this title (relating to Metal Limits) for five years.
2. (b) A person who derives material from water treatment residuals for land application shall retain the sample results demonstrating compliance with Table 1 of §312.43(b)(1) of this title for five years.

3. (c) A person who land applies water treatment residuals meeting the requirements in §312.125(a)(1) of this title (relating to Management Practices) shall retain the following information indefinitely:

   1. (1) the concentration of cadmium in the water treatment residuals;
   2. (2) the amount of water treatment residuals land applied;
   3. (3) the number of acres where water treatments residuals were land applied;
   4. (4) the cumulative amount of cadmium in the water treatment residuals land applied to each site;
   5. (5) the background soil pH at the time of when water treatment residuals were land applied; and
   6. (6) the soil cation exchange capacity (CEC) in meq/100 grams.
4. (d) A person who land applies water treatment residuals meeting the requirements in §312.125(a)(2) of this title shall retain the information required by §312.125(a)(2) of this title indefinitely.

5. (e) A person who land applies water treatment residuals shall develop the following information and shall retain the information for five years:

   1. (1) the dates of harvesting; and
   2. (2) the amount harvested, excluding grazing.

Source Note:The provisions of this §312.127 adopted to be effective April 23, 2020, 45 TexReg 2542.