Page 61 - Wastewater Solids Incineration Systems

30 Wastewater Solids Incineration Systems

The general duty clause, like much of the RMP regulation, is performance-based,
and the method for compliance is for the most part to be determined by the source.
U.S. EPA guidance states that owners that use extremely hazardous substances “must
adhere, at a minimum, to industry standards and practices (as well as local, state, and
federal laws and regulations) in order to be in compliance with the General Duty
Clause.” Accordingly, all potentially hazardous substances need to be stored in a
building, have separate filling areas and piping and full vessel containment, and be
separated in physical distance per applicable codes and standards to ensure no
mixing can occur if a vessel loses its entire stored chemical. In addition, the fill pipes,
tanks, and loading areas must be clearly marked.

4.5 Wastewater Residuals Management (Part 503)
Performance standards for the treatment and disposal of WWTP residuals required
by CWA Amendments of 1987 are contained in Title 40, Part 503 of the Code of Fed-
eral Regulations (40 CFR 503), also referred to as Part 503 rules (promulgated 58 FR
9387, Feb. 19, 1993). Subpart B contains the requirements for the placement of
biosolids on land application sites. This subpart defines the various classes of
biosolids and their suitability for land application. Subpart E defines the require-
ments for residuals fired in an incinerator.
For multiple-hearth and fluid bed incinerators, pollutant limits are based on
emission limits established elsewhere in the regulations, atmospheric dispersion, and
control efficiency. Specific limits are derived for seven metals, total hydrocarbons, or
carbon monoxide.

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• Particulate matter emission limit of 0.18 g/m (0.08 gr/ cu ft) dry gas at stan-
dard temperature and pressure corrected to 12% carbon dioxide.
• Beryllium emission of 10 g per 24-hour period.

• Mercury emission limit of 3200 g per 24-hour period.
• Lead, arsenic, cadmium, chromium, and nickel feed cake limits based on
ambient air quality and health risk specific concentrations.
• Total hydrocarbon monthly average concentration of 100 ppm by volume, cor-
rected to 0% moisture and 7% oxygen.
• Carbon monoxide monthly average concentration of 100 ppm by volume, cor-
rected to 0% moisture and 7% oxygen.