Hexavalent Chromium ATCM for Decorative and Hard Chrome

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Effective Date: October 24, 2007§ 93102.10 Inspection and Maintenance Requirements.(a)Hexavalent chromium electroplating and chromic acid anodizingfacilities shall comply with the applicable inspection andmaintenance requirements listed in Table 93102.10.Table 93102.10 -- Summary of Inspection and Maintenance RequirementsControlTechnique/EquipmentComposite mesh-pad(CMP) system,Packed-bed scrubber(PBS), or PBS/CMPInspection and MaintenanceRequirements1. Visually inspect device to ensurethat there is proper drainage, nounusual chromic acid buildup on thepads, and/or packed beds and noevidence of chemical attack that affectsthe structural integrity of the device.2. Visually inspect back portion of themesh pad closest to the fan to ensurethere is no breakthrough of chromicacid mist,and/or back portion of thechevron mist eliminator to ensure it isdry and there is no breakthrough ofchromic acid mist.3. Visually inspect ductwork from tankto the control device to ensure thereare no leaks.4. Perform washdown and/or add freshmakeup water to the packed bed whenit is needed.Frequency1. 1/quarter.2. 1/quarter.3. 1/quarter.4. Permanufacturer.Fiber-bed mist Same as number 1 for CMP/PBS. 1. 1/quarter.eliminator ASame as number 3 for CMP/PBS.2. 1/quarter.High EfficiencyParticulate Arrestor(HEPA) filterSame as number 4 for CMP/PBS.1. Look for changes in the pressuredrop.3. Permanufacturer.1. 1/week.2. Replace HEPA filter. 2. Permanufacturer'sspecifications,or permittingagency'srequirement.30
Effective Date: October 24, 2007Chromium tank covers[facilities complyingwith subsection93102.6(b)]Pitot tubeAmpere-hour meterStalagmometer/Tensiometer1. Drain the air-inlet (purge air) valvesat the end of each day that the tank isin operation.2. Visually inspect access door sealsand membranes for integrity.3. Drain the evacuation unit directlyinto the plating tank or into the rinsetanks (for recycle into the plating tank).4. Visually inspect membranes forperforations using a light source thatadequately illuminates the membrane(e.g., Grainger model No. 6X971Fluorescent Hand Lamp).5. Visually inspect all clamps for properoperation; replace as needed.6. Clean or replace filters onevacuation unit.7. Visually inspect piping to, pipingfrom, and body of evacuation unit toensure there are no leaks and noevidence of chemical attack.8. Replace access door seals,membrane evacuation unit filter, andpurge air inlet check valves inaccordance with the manufacturer'srecommendations.Backflush with water, or remove fromthe duct and rinse with fresh water.Replace in the duct and rotate 180degrees to ensure that the same zeroreading is obtained. Check pitot tubeends for damage. Replace pitot tube ifcracked or fatigued.Install and maintain per manufacturer'sspecifications.Calibrate and maintain permanufacturer’s specifications.1. 1/day.2. 1/week.3. 1/week.4. 1/month.5. 1/month.6. 1/month.7. 1/quarter.8. Permanufacturer.1/quarter.Permanufacturer.Permanufacturer.AInspection and maintenance requirements for the control device installedupstream of the fiber-bed mist eliminator to prevent plugging do not apply as longas the inspection and maintenance requirements for the fiber-bed unit arefollowed.(b)Add-on air pollution control device(s) that is custom designed for aspecific operation shall develop operating and maintenancerequirements. The requirements shall be submitted to the31
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Hexavalent Chromium ATCM for Decorative and Hard Chrome

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