DEQ-CFW_00088466

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DEQ-CFW 00088466

Form D: Process Information (Page 1 of 2) Facility ID# 0900009
North Carolina Department of Environment and Natural Resources
Division of Air Quality
1998 Annual Air Pollutant Emissions Inventory
1. Source ID No(s): WT-1 and WT-2
2. Permit Item No(s): 4
3. Process Description: Wastewater Treatment Sludge Dryers
4. Operational Schedule:
Hour per
Day
Day per
Week
5. Start Hour of Process: Continuous
6. Percentage Annual Throughput:
is Dec -Feb 25
7. Maximum Process
Rate per Hour: (ex:
gal/hr, mmcf/hr)
Mar -May 25
n/a
include units
Weeks per
Year
June -Aug 25
8. Annual Process
Throughput:
(ex: lb/yr, gal/yr)
9. Capture Efficiency (% of Process Emissions Vented Through Control Device): 50%
10. Control Device Descriptions Primary Caustic Scrubber WTCD-3
Secondary
11. Combined Control Device Efficiency (%): 95%
12. ANNUAL FUEL USAGE (e.g. Coal, oil, wood, natural gas, etc.) - Use additional sheets if necessary
•
Hours per 8760
Year
Sept -Nov 25
n/a
include units
DEQ-CFW 00088467

•Form-D: Process Information (Page 2 of 2) Facility ID# 0900009 Source ID # WT-1 & WT-2
L�
Actual Emissions per Pollutant Listed for Source Described Above:
Attach calculations and documentation of emission factors or other estimation methods used.
"Per Ton" Pollutant:
TSP
PM-10
S02
NOx
VOC
CO
Net Control Efficiency (%):
95%
Actual Emissions: Tons/year
0
***All Other HAPs/TAPs as listed in Appendix C or Appendix D (use additional sheets if necessary)***
,.0 A
We
Chlorine
7782-50-5
Fluorine
7782-41-4
Hydrazine
302-01-2
Hydrogen Chloride
7647-01-0
Hydrogen Fluoride
7664-39-3
Hydrogen Sulfide
7783-06-4
Lead Compounds
LEADCPDS
Methyl Chloroform
71-55-6
Methylene Chloride
75-09-2
Ozone
10028-15-6
Perchloroethylene
127-18-4
Phosphine
7803-51-2
Information on Page 2 of Form D cannot be held confidential.
DEQ-CFW 00088468

•
•
Supportine Documentation for WT-1 and WT-2
The Specific Conditions for the Impingement Type Wet Scrubber (ID No. WTCD-3)
listed in Item 4 of the site's Air Permit is discussed under section A(8) of that permit.
The Permit states that the scrubber "is installed solely for control of odorous emissions
from the wastewater treatment sludge dryers Nos. WT-1 and WT-2 and shall be
operated as necessary to control odorous emissions."
Emissions from the drying of activated sludge could generally be grouped into the
following categories:
Carbon Dioxide
Methane
Amines
Ammonia
Mercaptans
The amines, ammonia, and mercaptans would be controlled with the Scrubber; the
carbon dioxide and methane are exempted as VOCs.
Based on the lack of odors coming from the discharge of scrubber No. WTCD-3, and
the low odor threshold of the possible odorous compounds coming from the scrubber,
we feel that only an insignificant amount of VOCs could be emitted from this source.
Additionally, this sludge drying operation appears to be categorically exempted by the
Instruction's section titled "Sources Not Required to Report", which lists under Item F
"Industrial wastewater treatment processes" except for "sludge incinerators".
DEQ-CFW 00088469