§ 266.106 Standards to control metals emissions.
(a) General. The owner or operator must comply with the metals standards provided by paragraphs (b), (c), (d), (e), or (f) of this section for each metal listed in paragraph (b) of this section that is present in the hazardous waste at detectable levels by using appropriate analytical procedures.
(b) Tier I feed rate screening limits. Feed rate screening limits for metals are specified in appendix I of this part as a function of terrain-adjusted effective stack height and terrain and land use in the vicinity of the facility. Criteria for facilities that are not eligible to comply with the screening limits are provided in paragraph (b)(7) of this section.
(1) Noncarcinogenic metals. The feed rates of antimony, barium, lead, mercury, thallium, and silver in all feed streams, including hazardous waste, fuels, and industrial furnace feed stocks shall not exceed the screening limits specified in appendix I of this part.
(i) The feed rate screening limits for antimony, barium, mercury, thallium, and silver are based on either:
(A) An hourly rolling average as defined in § 266.102(e)(6)(i)(B); or
(B) An instantaneous limit not to be exceeded at any time.
(ii) The feed rate screening limit for lead is based on one of the following:
(A) An hourly rolling average as defined in § 266.102(e)(6)(i)(B);
(B) An averaging period of 2 to 24 hours as defined in § 266.102(e)(6)(ii) with an instantaneous feed rate limit not to exceed 10 times the feed rate that would be allowed on an hourly rolling average basis; or
(C) An instantaneous limit not to be exceeded at any time.
(2) Carcinogenic metals. (i) The feed rates of arsenic, cadmium, beryllium, and chromium in all feed streams, including hazardous waste, fuels, and industrial furnace feed stocks shall not exceed values derived from the screening limits specified in appendix I of this part. The feed rate of each of these metals is limited to a level such that the sum of the ratios of the actual feed rate to the feed rate screening limit specified in appendix I shall not exceed 1.0, as provided by the following equation:
where:
(ii) The feed rate screening limits for the carcinogenic metals are based on either:
(A) An hourly rolling average; or
(B) An averaging period of 2 to 24 hours as defined in § 266.102(e)(6)(ii) with an instantaneous feed rate limit not to exceed 10 times the feed rate that would be allowed on an hourly rolling average basis.
(3) TESH. (i) The terrain-adjusted effective stack height is determined according to the following equation:
where:
(ii) The stack height (Ha) may not exceed good engineering practice as specified in 40 CFR 51.100(ii).
(iii) If the TESH for a particular facility is not listed in the table in the appendices, the nearest lower TESH listed in the table shall be used. If the TESH is four meters or less, a value of four meters shall be used.