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City of Omaha - Nebraska

City of Omaha Public WorksOmaha, Nebraska

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40 CFR 63 Subpart M covers dry cleaning facilities that use perchloroethylene (perc).  This regulation covers both Major and Area sources of perc. Source classification is based on the amount of perc purchased each year. The rule originally included different amounts for each classification depending on whether a facility had dry-to-dry machines, transfer machines, or both.  However, as of July 29, 2008, dry-to-dry machines are the only machines allowed to be used.

Source ClassificationPerc Purchases
Small Area Source < 140 gallons/year
Large Area Source 140-2100 gallons/year
Major Source > 2,100 gallons/year

 

Source StatusUnit Installation Date
Existing Source Before December 9, 1991
New Source On or after December 9, 1991

 

Compliance Requirements:

Source ClassificationRequirements
Existing Small Area Source
  • Keep machine door closed when not loading/unloading
  • Operate and maintain equipment according to manufacturer specifications
  • Cover perc storage and waste
  • Drain cartridge filters in housing or sealed container for 24
  • Repair leaks within 24 hours
  • Parts ordered within 2 days
  • Installed within 5 days
New Small Area Source Same as above, except:
  • Inspect for leaks during operation weekly
Plus:
  • Operate vented machines using a refrigerated condenser & diverter valve
New Small Area Source (constructed after 12/21/05) Same as above, except:
  • Operate closed loop (non-vented) using:
  • Refrigerated condenser
  • Carbon adsorber after condenser
Existing Large Area Source Same as New Small Area Source, except:
  • Can operate with a carbon adsorber is installed before 9/22/93, but must replace with refrigerated condenser after effective life
New Large Area Source Same as New Small Area Source
New Large Area Source (constructed after 12/21/05) Same as above, except:
  • Operate closed loop system with:
    • Refrigerated condenser
    • Carbon adsorber after condenser
Existing Major Source Same as Existing Large Area Source
New Major Source Same as New Large Area Source (constructed after 12/21/05)

Monitoring Requirements:

Source ClassificationMonitoring Requirement
Existing Small Area Source Perceptible:
  • Biweekly
Vapor:
  • Monthly
  • One vapor can replace one biweekly perceptible
  • Using hydrocarbon or gas analyzer
New Small Area Source Perceptible:
  • Weekly
Vapor:
  • Monthly
  • One vapor can replace one weekly perceptible
  • Using hydrocarbon or gas analyzer
Large Area & Major Sources Perceptible:
  • Weekly
Vapor:
  • Monthly
    • Major must use perc gas analyzer
  • One vapor can replace one weekly perceptible

If perc purchases increase by an amount sufficient to bring a facility into a higher source classification, a facility must submit a change in status notification and comply with higher source classification requirements in 180 days.  In addition, annual notification of compliance is due to OAQC by March 31, 2011 for each dry cleaning facility (download a copy of OAQC's Annual Notification of Compliance formpdf symbol.

*If you have trouble reading or accessing this form, please contact OAQC at 402-444-6015.*


Recordkeeping:

All sources must keep the following records onsite for 5 years:

  • Perc purchases
    • Keep all receipts
    • 12-month rolling totals
    • 1st day of each month
  • Notifications & Reports
  • Manufacturers specs
    • Can download generic on EPA site
  • Leak inspections
    • Dates
    • Components where leaks detected
    • Repair info & dates
  • Control monitoring records
    • Condenser = Weekly pressure or temps       
    • Adsorber = Weekly perc concentration

Resources:

The Nebraska Department of Environmental Quality (NDEQ) has developed a Dry Cleaner Manual as a tool to help facilities maintain regulatory compliance. Download a copy of the NDEQ Dry Cleaner Manual.pdf symbol

Additionally, every 2 years the NDEQ publishes a Dry Cleaner Calendar to be used by facilities to help maintain compliance with this rule. Download the most recent version of this calendar.pdf symbol

*The City of Omaha cannot guarantee the accuracy or accessibility of any document published by an outside agency.*

Links:

NDEQ Air Toxics Notebook 1M page
EPA Dry Cleaning Facilities page