SACRAMENTO METROPOLITAN AIR QUALITY MANAGEMENT DISTRICT

RULE 903 - MERCURY
(Adopted 6-2-75; Amended 12-6-78)


INDEX

100 GENERAL

200 DEFINITIONS

300 STANDARDS

400 ADMINISTRATIVE REQUIREMENTS

500 MONITORING AND RECORDS


100 GENERAL

101 PURPOSE: To limit the emission of mercury to the atmosphere.

200 DEFINITIONS

201 CELL ROOM: A structure(s) housing one or more mercury electrolytic chlor-alkali cells.

202 CONDENSER STACK GASES: The gaseous effluent evolved from the stack or processes utilizing heat to extract mercury metal from mercury ore.

203 DENUDER: A horizontal or vertical container which is part of mercury chlor-alkali cell and in which water and alkali metal amalgam are converted to alkali metal hydroxide, mercury, and hydrogen gas in a short-circuited, electrolytic reaction.

204 END BOX: A container(s) located on one or both ends of a mercury chlor-alkali electrolyzer which serves as a connection between the electrolyzer and denuder for rich and stripped amalgam.

205 END BOX VENTILATION SYSTEM: A ventilation system which collects mercury emissions from the endboxes, the mercury pump sumps, and their water collection system.

206 HYDROGEN GAS STREAM: A hydrogen stream formed in the chlor-alkali cell denuder.

207 MERCURY: The element mercury, excluding any associated elements, and including mercury in particulates, vapors, aerosols, and compounds.

208 MERCURY CHLOR-ALKALI CELL: A device which is basically composed of an electrolyzer section and a denuder (decomposer) section and utilizes mercury to produce chlorine gas, hydrogen gas, and alkali metal hydroxide.

209 MERCURY CHLOR-ALKALI ELECTROLYZER: An electrolytic device which is part of a mercury chlor-alkali cell and utilizes a flowing mercury cathode to produce chlorine gas and alkali metal amalgam.

210 MERCURY ORE: A mineral mined specifically for its mercury content.

211 MERCURY ORE PROCESSING FACILITY: A facility processing mercury ore to obtain mercury.

212 SLUDGE: Sludge produced by a treatment plant that processes municipal or industrial waste waters.

213 SLUDGE DRYER: A device used to reduce the moisture content of sludge by heating to temperatures above 65oC (ca. 150oF) directly with combustion gases.

300 STANDARDS

301 MERCURY ORE PROCESSING: Emissions to the atmosphere from those stationary sources which process mercury ore to recover mercury and those which use mercury chlor-alkali cells to produce chlorine gas and alkali metal hydroxide shall not exceed 2,300 grams of mercury per 24-hour period.

302 SLUDGE INCINERATION PLANTS: Emissions to the atmosphere from sludge incineration plants, sludge drying plants, or a combination of these that process wastewater treatment plant sludges shall not exceed 3,200 grams of mercury per 24-hour period.

303 OTHER REQUIREMENTS: If any other rule in these Rules and Regulations is more restrictive, that rule shall apply.

400 ADMINISTRATIVE PROCEDURES

401 TESTING: Unless a waiver of emission testing is obtained under Rule 901, Section 403, or has been previously granted under 40 CFR 61.13, each owner or operator shall test emissions:

402 REPORTING: The Air Pollution Control Officer shall be notified at least 30 days prior to an emission test, so that he may at his option observe the test. At his option, the Air Pollution Control Officer may conduct the required test.

500 MONITORING AND RECORDS

501 MERCURY ORE PROCESSING FACILITY:

502 MERCURY CHLOR-ALKALI PLANTS - HYDROGEN AND END BOX VENTILATION GAS STREAMS:

503 MERCURY CHLOR-ALKALI PLANTS - CELL ROOM VENTILATION SYSTEM:

504 SLUDGE INCINERATION AND DRYING PLANTS:

505 EMISSION MONITORING: Wastewater treatment plant sludge incineration and drying plants, for which mercury emissions exceed 1,600 g/day, demonstrated by any of the methods specified in this rule, shall monitor mercury emissions at intervals of at least once per year by any of the methods specified in this rule.