Document QkqXQ0n01o1Ng7xBrgMMa51ro

measured by the colorimetric method as > described in :36 Fed. Reg. 22396. Rovember 2S. 1971. or by ah equivalent method approved by the Agency; Section 241.I2S Ozone a) Standard. The ambient air quality standard for ozone is 0.12 ppm (235 micrograms per cubic meter) maximum 1-hour concentration not to be exceeded on more than one day per year. b) Measurement Method. For determining conformance with, the ozone air quality standard, ozone shall be measured by the ozone-ethylene reaction method as described . in 40 CFR SO.. Appendix-0 (1902). as amended. (Source:. Amended at 6 111. Reg: S804. effective April 22. 1982) Section 243.126 Lead a). Standard. The ambient air quality standards for lead and Its compounds are 1.5 micrograms per cubic meter, maximum arithmetic mean average over a calendar quarter. . b) Measurement .Method. For determining ....conformance with the ambient air quality standards, for lead and its compounds, lead . and its compounds shall be measured by the atomic absorbtton spectrometry or equivalent method as described in 40 CFR SO. Appendix 6 (1982). (Source: Amended at 7 111. Reg. 9906. effective August 8. 1983) . Section 'Bulfi 243.107...................................... ... 306 243.108...............................................Added in Codification i 2431121.......... -'I........... 107 . 243.122................................ 308 243.123;..................... 310 243.124...;.......;,;.':;................ 311 . 243.12$......... .......................................312 243.126...................... ........................ 313 ' - Appendix A....,................................. Added In - Codification Appendix l.-.V................................... Added in . 1 Codification Appendix C..........................304 Appendix'C Past Compliance Oates Rule 304 except as otherwise noted, compliance with -this Part was required on dune 26. 1973. Appendix A Rule into Section Table Buis Section Unnumbered.................................... 243.101 301 ....... 243.102 302 .................................................. 243.103 303.. ..:................. __________ . 243.104 304.. :...:..................... Appendix C 305................... 241.106 306243'. 107 307.. .............................. 243.121 308;......................................... 2431122 309 ..................... .................. Repealed 310 .................. 243.123 311 ................................................. 243.124 312 ................................................. 243.12S 313.. ................... 243.126 . :i 1 Appendix; B Section Into Rule Table . Section Rule 243.101...................................... Unnumbered 243.102.................... ........................... 301 243.103 ................................. 302 243.104 .......................................... . J03 243.106.................................................... 30S - 180 - i. 1 1 /'