(a) The engineering report must identify the final use or final disposal of the sludge. The use, disposal, and transportation of sludge must be conducted in accordance with the requirements contained in Chapter 312 of this title (relating to Sludge Use, Disposal, and Transportation) or in Chapter 330 of this title (relating to Municipal Solid Waste).
(b) Quantities of Sludge. The quantity of solids generated by the treatment process must be estimated using a mass-balance approach or actual data from a similar full-scale wastewater treatment facility or pilot study. The methods, calculations, and analyses used to estimate quantities of solids must be included in the engineering report.
(c) Final Disposition. The sludge use or disposal option must be based on the pathogen and vector attraction characteristics of the sludge.
(d) Sludge Constituents.
  (1) The concentrations of metals in sludge must be determined using methods approved in 40 Code of Federal Regulations §136.3 and must be less than the levels specified in §312.63 of this title (relating to Metal Limits (Other Than Domestic Septage)).
  (2) A sludge processing system must reduce pathogens in sludge to levels that comply with §312.82 of this title (relating to Pathogen Reduction).
  (3) A sludge processing system must produce digested sludge that complies with §312.83 of this title (relating to Vector Attraction Reduction).
(e) Emergency Provisions for Sludge Disposal. The design of a sludge processing system must include a secondary method of sludge disposal to use in the event of conditions that prevent the use of a wastewater treatment facility's primary use or primary disposal method. The secondary sludge disposal method must be included in the engineering report.
(f) Weather Factors. Weather factors such as rainfall, wind conditions, and humidity must be considered as process selection and storage constraints in the determination of the use or disposal of sludge.

Source Note: The provisions of this §217.252 adopted to be effective August 28, 2008, 33 TexReg 6843; amended to be effective December 4, 2015, 40 TexReg 8254