EPA Form 5900-81 

 OMB No. 2060-0336, Approval Expires 04/30/2012

Federal Operating Permit Program (40 CFR Part 71)

EMISSIONS UNIT DESCRIPTION FOR VOC EMITTING SOURCES (EUD-2)

A. General Information

Emissions unit ID ___________ Description __________________________________ 

SIC Code (4-digit) __________ SCC Code ________ 

B. Emissions Unit Description 

Equipment type _____________________________ Temporary source: ___Yes ___No 

Manufacturer__________________________ Model No. _______________________ 

Serial No. ________________________________ Installation date____/____/________ 

Articles being coated or degreased _____________________________________________ 

Application method _________________________________________________________ 

Overspray (surface coating) (%) _________ Drying 

method_________________________ 

No. of dryers ________ Tank capacity (degreasers) (gal) _____________ 

C. Associated Air Pollution Control Equipment

Emissions unit ID ___________ Device Type____________________________________ 

Manufacturer ________________________ Model No____________________________ 

Serial No. ______________________________ Installation date ____/____/_________ 

Control efficiency (%) _________.___ Capture efficiency (%) ________.___ 

Air pollutant(s) controlled______________ Efficiency estimation method _______________ 

D. Ambient Impact Assessment 

This information must be completed by temporary sources or when ambient impact assessment is an 

applicable requirement for this emissions unit (this is not common). 

Stack height (ft) __________._____ Inside stack diameter (ft) _________._____ 

Stack temp (F) __________._____ Design stack flow rate (ACFM) __________.____ 

Actual stack flow rate (ACFM) _______________ Velocity (ft/sec) 
 EPA Form 5900-81 

 EUD-2 2

____________._______ 

E. VOC-containing Substance Data 

List each VOC-containing substance consumed, processed or produced at the emissions unit that is 

emitted into the air. In the name column, if providing a brand name, include the name of the manufacture; 

if the substance contains HAP, list the constituent HAP. 

Substance 

Name 

(Chemical, 

Brand Name) 

CAS No. Substance 

Type 

Actual 

Usage 

 (gal/yr) 

Max 

Usage 

(gal/day) 

Max 

Usage 

(gal/year) 

VOC 

Content 

(lb/gal) 

 

 

 

 

 

 

 

 
 EPA Form 5900-81 

 EUD-2 3

INSTRUCTIONS FOR EUD-2 

EMISSIONS UNIT DESCRIPTION FOR VOC EMITTING SOURCES 

Use this form to describe emissions units that use, process, store or produce substances containing 

VOC and that primarily emit VOC, such as painting or coating operations and printers. 

In addition, this form may also be useful for certain HAP emitting sources. The purpose of this form is 

to help you collect and organize technical data, including operational characteristics, applicable 

requirements, compliance terms, and emissions. 

Section A - The emissions unit ID should be consistent with the one used in section I of form GIS. 

Enter the four-digit SIC code for the unit, which may be different from that used to describe the facility 

as a whole. In addition, enter the Source Classification Code (SCC), if known or available, but this is 

not mandatory. 

Section B - There may be other information that the permitting authority will need to know that is not 

specifically requested on the forms and that should be included on attachments. Such information 

would include information needed to adequately identify the emissions unit and to determine its 

applicable requirements. 

Section C - Identify and describe any associated air pollution control device for the unit described 

above. If data (such as control efficiency) provided by the vendor, attach documentation (if available); 

If other basis, indicate how determined (e.g., AP-42). 

Section D - Complete this section only if ambient impact assessment is an applicable requirement or 

the facility is a temporary source. This is not common. 

Section E - VOC content and usage values are typically used to calculate emissions. Actual usage 

will be multiplied by VOC content to calculate actual emissions, while maximum usage will be 

multiplied by VOC content to calculate PTE. Explain the basis for the usage and VOC content values 

on an attachment (e.g., material safety data sheet or MSDS). Also, EPA Reference Method 24 of 40 

CFR Part 60, Appendix A, can also be used to determine VOC content but this is not required solely 

for these application purposes. When VOC Content is determined through testing or calculation by the 

applicant, the applicant must attach test data and calculations.