NR 661.0035(2)(b)2.b.b. Rinse process equipment with an appropriate solvent until dioxins and dibenzofurans are not detected in the final solvent rinse. NR 661.0035(2)(b)3.b.b. “Not detected” means at or below the following lower method calibration limits or MCLs: The 2,3,7,8-TCDD-based MCL—0.01 parts per trillion or ppt, sample weight of 1000 g, IS spiking level of 1 ppt, final extraction volume of 10-50 μL. For other congeners—multiply the values by 1 for TCDF/PeCDD/PeCDF, by 2.5 for HxCDD/HxCDF/HpCDD/HpCDF, and by 5 for OCDD/OCDF. NR 661.0035(2)(d)1.1. A generator acting under par. (a) 3. shall document that previous equipment cleaning or replacement was performed in accordance with this section and occurred after cessation of use of chlorophenolic preservatives. NR 661.0035(3)(3) The generator shall maintain all of the following records documenting the cleaning and replacement as part of the facility’s operating record: NR 661.0035(3)(b)(b) Formulations previously used and the date on which their use ceased in each process at the plant. NR 661.0035(3)(e)(e) The name and address of any persons who conducted the cleaning and replacement. NR 661.0035(3)(h)(h) A description of the sample handling and preparation techniques, including techniques used for extraction, containerization, preservation, and chain-of-custody of the samples. NR 661.0035(3)(i)(i) A description of the tests performed, the date the tests were performed, and the results of the tests. NR 661.0035(3)(j)(j) The name and model numbers of the instrument used in performing the tests.