(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.(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.(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) the concentration of cadmium in the water treatment residuals;(2) the amount of water treatment residuals land applied;(3) the number of acres where water treatments residuals were land applied;(4) the cumulative amount of cadmium in the water treatment residuals land applied to each site;(5) the background soil pH at the time of when water treatment residuals were land applied; and(6) the soil cation exchange capacity (CEC) in meq/100 grams.(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.(e) A person who land applies water treatment residuals shall develop the following information and shall retain the information for five years:(1) the dates of harvesting; and(2) the amount harvested, excluding grazing.