Hard and Decorative Chromium Electroplating and Chromium Anodizing Tanks

National Emission Standard for Hazardous Air Pollutants (NESHAP) 40 CFR Part 63, Subpart N

Table 2 to §63.342—Housekeeping Practices

For: You must: At this minimum frequency:

1. Any substance used in an affected (a) Store the substance in a closed At all times, except when transferring the chromium electroplating or container in an enclosed storage area or substance to and from the container. chromium anodizing tank that building; AND contains hexavalent chromium. Whenever transporting substance, except (b) Use a closed container when when transferring the substance to and transporting the substance from the from the container. enclosed storage area.

2. Each affected tank, to minimize (a) Install drip trays that collect and return Prior to operating the tank. spills of bath solution that result to the tank any bath solution that drips or from dragout. drains from parts as the parts are removed from the tank; OR Note: this measure does not require the return of contaminated bath (b) Contain and return to the tank any bath solution to the tank. This solution that drains or drips from parts as Whenever removing parts from an affected requirement applies only as the parts the parts are removed from the tank; OR tank. are removed from the tank. Once away from the tank area, any spilled (c) Collect and treat in an onsite solution must be handled in wastewater treatment plant any bath accordance with Item 4 of these solution that drains Whenever removing parts from an affected housekeeping measures. or drips from parts as the parts are tank. removed from the tank.

3. Each spraying operation for Install a splash guard to minimize Prior to any such spraying operation. removing excess chromic acid from overspray during spraying operations and parts removed from, and occurring to ensure that any hexavalent chromium over, an affected tank. laden liquid captured by the splash guard is returned to the affected chromium electroplating or anodizing tank. 4. Each operation that involves the Begin clean up, or otherwise contain, all Within 1 hour of the spill. handling or use of any substance spills of the substance. used in an affected chromium electroplating or chromium Note: substances that fall or flow into drip anodizing tank that contains trays, pans, sumps, or other containment hexavalent chromium. areas are not considered spills.

5. Surfaces within the enclosed (a) Clean the surfaces using one or more of At least once every 7 days if one or more storage area, open floor area, the following methods: chromium electroplating or chromium walkways around affected tanks (i) HEPA vacuuming; anodizing tanks were used, or at least after contaminated with hexavalent (ii) Hand-wiping with a damp cloth; every 40 hours of operating time of one or chromium from an affected (iii) Wet mopping; more affection chromium electroplating or chromium electroplating or (iv) Hose down or rinse with potable water chromium anodizing tank, whichever is chromium anodizing tank. that is collected in a wastewater collection later. system; (v) Other cleaning method approved by the permitting authority; OR According to manufacturer’s recommendations. (b) Apply a non-toxic chemical dust suppressant to the surfaces.

6. All buffing, grinding, or Separate the operation from any affected Prior to beginning the buffing, grinding, or polishing operations that are electroplating or anodizing operation by polishing operation. located in the same room as installing a physical barrier; the barrier chromium electroplating or may take the form of plastic strip curtains. chromium anodizing operations.

7. All chromium or chromium- Store, dispose, recover, or recycle the At all times. containing wastes generated wastes using practices that do not lead to from housekeeping activities. fugitive dust and in accordance with hazardous waste requirements.