Hexavalent Chromium ATCM for Decorative and Hard Chrome

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Effective Date: October 24, 2007the value established during the performance test to demonstratecompliance with the emission limitation for CMP, PBS, a CMP/PBS,and a fiber-bed mist eliminator. The pressure drop shall bemaintained within - ½ times to +2 times the inches of water of thevalue established during the performance test to demonstratecompliance with the emission limitation for HEPA filters.(c)(d)Inlet velocity pressure. The owner or operator shall continuouslymonitor the inlet velocity pressure of a packed-bed scrubber with amechanical gauge. The gauge shall be located so that it can beeasily visible and in clear sight of the operation, or maintenancepersonnel. The inlet velocity pressure shall be maintained withinplus or minus 10 percent of the value established during theperformance test to demonstrate compliance with the emissionlimitation.Surface tension.(1) The owner or operator of a facility that is required to use achemical fume suppressant as specified in section 93102.8 tocomply with section 93102.4 shall measure and monitor thesurface tension of the electroplating, or anodizing bath(s) thatcontains a chemical fume suppressant listed in Table 93102.8of section 93102.8 with either a stalagmometer using theprocedure in Appendix 8 of section 93102.16 or a procedureapproved by the permitting agency, or with a tensiometerusing U.S. EPA Method 306B (40 CFR part 63, Appendix A).The surface tension shall be maintained below the valuerequired by section 93102.8. Surface tension shall bemeasured daily for 20 operating days, and weekly thereafteras long as there is no violation of the surface tensionrequirement. If a violation occurs, the measurement frequencyshall return to daily for 20 operating days, and weeklythereafter.(2) The owner or operator of a facility using a chemical fumesuppressant containing a wetting agent that is not required touse a chemical fume suppressant listed in Table 93102.8 ofsection 93102.8 shall measure and monitor the surfacetension of the chromium electroplating or chromic acidanodizing tank bath(s) with either a stalagmometer using theprocedure in Appendix 8 of section 93102.16 or a procedureapproved by the permitting agency, or with a tensiometerusing U.S. EPA Method 306B (40 CFR part 63, Appendix A).If the surface tension is measured with a stalagmometer thesurface tension shall be maintained below28
Effective Date: October 24, 200745 dynes/centimeter. If the surface tension is measured with atensiometer, the surface tension shall be maintained below35 dynes/centimeter. Surface tension shall be measured dailyfor 20 operating days, and weekly thereafter as long as thereis no violation of the surface tension requirement. If a violationoccurs, the measurement frequency shall return to daily for20 operating days, and weekly thereafter.(3) Facilities with an approved alternative method of complianceas specified in section 93102.4(b)(3) and using chemical fumesuppressants as all or partial control of hexavalent chromiumemissions must measure and monitor the surface tension ofthe electroplating or anodizing bath daily. The surface tensionmust be maintained at or below the surface tension measuredduring the performance test.(e)(f)Foam blanket thickness. The owner or operator shall monitor thefoam blanket thickness across the surface of the electroplating, oranodizing bath(s). The foam blanket thickness shall be maintainedconsistent with the requirements established during theperformance test to demonstrate compliance with the emissionlimitation. Foam thickness shall be measured hourly for 15operating days, and daily thereafter as long as there is no violationof the foam thickness requirement. If a violation occurs, themeasurement frequency shall return to hourly for 15 operatingdays, and daily thereafter.Mechanical fume suppressants. The owner or operator shallvisually inspect the electroplating, or anodizing bath(s) for coveragecomparable to the coverage during the performance test daily.NOTE: Authority cited: Sections 39600, 39601, 39650, 39658, 39659, and 39666, Health andSafety Code. Reference: Sections 39650, 39658, 39659, 39665, and 39666, Health and SafetyCode; and 40 CFR Part 63 Subpart N.29
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Hexavalent Chromium ATCM for Decorative and Hard Chrome

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