HomeMy WebLinkAboutDAQ-2024-0051351
DAQC-CI101590001-24
Site ID 10159 (B1)
MEMORANDUM
TO: FILE – NORTH DAVIS SEWER DISTRICT (NDSD) – Wastewater Treatment
Plant
THROUGH: Chad Gilgen, Minor Source Compliance Section Manager
FROM: Irene Tucker, Environmental Scientist
DATE: January 17, 2024
SUBJECT: FULL COMPLIANCE EVALUATION, Minor, Davis County
INSPECTION DATE: December 14, 2023
SOURCE LOCATION: 4252 West 2200 South
Syracuse, UT 84075
SOURCE CONTACT: Myron Bachman, Plant Superintendent, 801-728-6830,
mbachman@ndsd.org
OPERATING STATUS: In operation
PROCESS DESCRIPTION: The NDSD receives sewage from approximately 225,000
residents for treatment before being discharged into the Great
Salt Lake. Ferric sulfate is added at the inlet of the plant
primarily for odor control but receives a great H2S reduction as a
secondary benefit. The solids process of the treatment facility
incorporates anaerobic digesters to biologically break down the
solids. This process involves heating the four primary digesters
to 98°F, and provides a constant feed as well as mixing for a
period of time not less than 15 days. As a byproduct of this
biological process, digester gas is created and harvested by the
facility.
To capitalize on this treatment process, the district utilizes
Combined Heat and Power (CHP) to utilize the digester gas and
provide the heat for the process as well as some other processes.
Currently the district creates about one megawatt of electrical
power from the CHP internal combustion engines. This provides
about 85% of the facility’s electrical needs during the winter
months and about 65% during the summer months. The CHP
system is designed to utilize 100% of the digester gas produced,
and has the ability to blend natural gas to maintain a baseload on
the CHP engines during times of low gas production. By being
able to blend natural gas to maintain digester gas pressure the
process is very stable. The district has three CHP engines that are
dual fuel and in emergencies or process upsets may be ran on
natural gas. They also incorporated a 3 MMBtu fuel input boiler
/ :
2
to provide redundant heat in the event that no engines can be
operated. The district also has a two megawatt diesel engine that
is utilized during power outages and during times of
maintenance on treatment facilities. In the event of a process
upset or major mechanical failure there is a 6" emergency flare
to make sure any gas not utilized in the engines is flared and not
released to the atmosphere.
The district employs a very proactive maintenance regime on the
CHP facility, and the digester gas treatment system. This
includes two iron sponges for H2S removal, activated carbon for
siloxane removal, and regulatory scheduled testing on both the
gas system and the engine to guarantee they are in compliance at
all times.
APPLICABLE REGULATIONS: Approval Order (AO) DAQE-AN101590008-17, dated
November 1, 2017
NSPS (Part 60) JJJJ : Standards of Performance for Stationary
Spark Ignition Internal Combustion Engines,
MACT (Part 63) - ZZZZ: National Emissions Standards for
Hazardous Air Pollutants for Stationary Reciprocating Internal
Combustion Engines,
SOURCE EVALUATION:
Name of Permittee: Permitted Location:
North Davis Sewer District - Wastewater
Treatment Plant
4252 West 2200 South 4252 West 2200 South
Syracuse, UT 84075 Syracuse, UT 84075
SIC Code: 4952: (Sewerage Systems)
Section I: GENERAL PROVISIONS
I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in the
UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions refer to
those rules. [R307-101]
I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]
I.3 Modifications to the equipment or processes approved by this AO that could affect the emissions
covered by this AO must be reviewed and approved. [R307-401-1]
I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by
the owner/operator, shall be made available to the Director or Director's representative upon
request, and the records shall include the two-year period prior to the date of the request. Unless
otherwise specified in this AO or in other applicable state and federal rules, records shall be kept
for a minimum of two (2) years. [R307-401-8]
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I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators shall,
to the extent practicable, maintain and operate any equipment approved under this AO, including
associated air pollution control equipment, in a manner consistent with good air pollution control
practice for minimizing emissions. Determination of whether acceptable operating and
maintenance procedures are being used will be based on information available to the Director
which may include, but is not limited to, monitoring results, opacity observations, review of
operating and maintenance procedures, and inspection of the source. All maintenance performed
on equipment authorized by this AO shall be recorded. [R307-401-4]
I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]
I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-150]
Status: In Compliance. There have been no modifications to the equipment and processes
approved by this AO. The North Davis Sewer District maintains records of maintenance
activities performed on approved equipment. There was no breakdown resulting in any
reportable emissions. The North Davis Sewer District submitted the 2022 Emissions
Inventory Report, and the emissions indicated compliance with the PTEs of this AO.
Section II: SPECIAL PROVISIONS
II.A The approved installations shall consist of the following equipment:
II.A.1 North Davis Sewer District
Wastewater Treatment Plant
II.A.2 Boiler #2
Fuel: Digester gas, natural gas, or combination of digester gas and natural gas
Rating: 3 MMBtu/hr
II.A.3 Carbon Adsorber
Number of units: One (1)
II.A.4 Iron Sponge Adsorber Units
Reduces the H2S in the digester gas that is combusted in Cogeneration Engine #'s 1, 2, and 3 and
Boiler # 2
Gas is treated in series with the units
Number of units: One (1)
Reduces H2S concentration to 58 ppm in the digester gas
Initial digester gas treatment
Number of units: One (1)
Reduces H2S concentration to 25 ppm in the digester gas
Final digester gas treatment
II.A.5 Cogeneration Engine #1
Lean burn
Fuel: Digester gas, natural gas, or combination of digester gas and natural gas
1,517 hp cogeneration engines driving 1,100 kW generators
NSPS Applicability: Subpart JJJJ
MACT Applicability: Subpart ZZZZ
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II.A.6 Cogeneration Engine #2
Lean burn
Fuel: Digester gas, natural gas, or combination of digester gas and natural gas
1,517 hp cogeneration engines driving 1,100 kW generators
NSPS Applicability: Subpart JJJJ
MACT Applicability: Subpart ZZZZ
II.A.7 Cogeneration Engine #3
Lean burn
Fuel: Digester gas, natural gas, or combination of digester gas and natural gas
Rating: 923 kW
Model: 7100GL
MACT Applicability: Subpart ZZZZ
II.A.8 Emergency Generator Engine
Fuel: Diesel
Rating: 2,593 bhp
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ
II.A.9 Emergency Flare
Fuel: Digester gas
Size: 6 inch
Status: In Compliance. There was no unapproved equipment observed onsite during this
inspection.
Additional equipment information from DAQC-1555-19:
IIA.2 — the boiler is a Cleaver Brooks — used during extremely cold temperatures to
ensure digester temperatures remain high enough for microbial activity to produce digester
gas needed to operate the cogen engines.
II.A.3 — there are 2 carbon adsorbers, 1 is backup. This unit removes siloxane from
digester gas before it is sent to the cogen engines. Tests are conducted every 90 days to
ensure efficacy of carbon adsorbing material.
II.A.4 — the iron sponge adsorber units consist of wood chips saturated with iron oxide. To
date, neither unit has registered any H2S gas. Digester gas is mixed with ferric sulfate to
reduce odors which also reacts with the H2S gas and removes it prior to going through the
iron sponge adsorber units.
II.A.5 — cogen engine #1 - manufactured 2014, installed 2016
II.A.6 — cogen engine #2 - manufactured 2014, installed 2016
II.A.7 — cogen engine #3 - manufactured and installed 1998, 1323 hp
II.A.8 — diesel emergency generator — installed 2004
II.A.9 — emergency flare operates in standby mode with pilot light that runs on natural gas
Also, on site were 2 Safety Kleen part washers, a 1,000 gallon diesel above ground tank, and
a 1,000 gallon gasoline above ground tank.
5
II.B Requirements and Limitations
II.B.1 Source-Wide Requirements
II.B.1.a Visible emissions from the following emission points shall not exceed the following opacity
values:
A. All boiler exhaust stacks - 10%
B. All diesel-fueled emergency generator engine exhaust stacks- 20%
C. Flare - 10%
D. Cogeneration engines - 10%
E. All other points - 20%. [R307-201-3, R307-401-8]
II.B.1.a.1 Opacity observations of emissions from stationary sources shall be conducted according to 40
CFR 60, Appendix A, Method 9. [R307-201-3, R307-401-8]
Status: In Compliance. There were no visible emissions observed during this inspection.
The opacity observations were conducted according to 40 CFR 60, Appendix A, Method 9.
II.B.1.b The emergency flare shall combust digester gas when combustion in other equipment is not
possible or excess digester gas is produced. [R307-401-8]
Status: In Compliance. The emergency flare combusts digester gas when combustion in
other equipment is not possible or when excess digester gas is produced.
II.B.2 Cogeneration Engine Requirements
II.B.2.a Emissions to the atmosphere at all times from the indicated emission point(s) shall not exceed the
following rates and concentrations:
Source: 1,050 kW (1,302 hp/923 kW for the site altitude) generator engine
Pollutant lb/hr g/bhp-hr
NOx 4.31 1.50
CO 7.61 2.65
Source: 1,517 hp (engine not de-rated for site altitude) generator engines
Pollutant ppm g/bhp-hr
NOx 93 0.5
CO 440 1.6.
[R307-401-8]
II.B.2.a.1
Stack testing to show compliance with the emission limitations stated in the above condition
shall be performed for the cogeneration engines (II.A.5 - II.A.7) every five (5) years or sooner if
directed by the Director. Test may be required if the source is suspected to be in violation with
other conditions of this AO.
A. Notification
The Director shall be notified at least 30 days prior to conducting any required emission testing.
A source test protocol shall be submitted to DAQ when the testing notification is submitted to
the Director.
6
The source test protocol shall be approved by the Director prior to performing the test(s). The
source test protocol shall outline the proposed test methodologies, stack to be tested procedures
to be used. A pretest conference shall be held, if directed by the Director.
B. Sample Location
The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A,
Method 1, or other methods as approved by the Director. An Occupational Safety and Health
Administration (OSHA) or Mine Safety and Health Administration (MSHA) approved access
shall be provided to the test location.
C. Volumetric Flow Rate
40 CFR 60, Appendix A, Method 2 or other testing methods approved by the Director.
D. NOx
40 CFR 60, Appendix A, Method 7, 7A, 7B, 7C, 7D, 7E, or other testing methods approved by
the Director.
E. CO
40 CFR 60, Appendix A, Method 10, or other testing methods approved by the Director.
F. Calculations
To determine mass emission rates (lb/hr, etc.) the pollutant concentration as determined by the
appropriate methods above shall be multiplied by the volumetric flow rate and any necessary
conversion factors determined by the Director, to give the results in the specified units of the
emission limitation.
G. New Source Operation
For a new source/emission point, the production rate during all compliance testing shall be no
less than 90% of the production rate listed in this AO. If the maximum AO allowable production
rate has not been achieved at the time of the test, the following procedure shall be followed:
1. Testing shall be at no less than 90% of the production rate achieved to date.
2. If the test is passed, the new maximum allowable production rate shall be 110% of the tested
achieved rate, but not more than the maximum allowable production rate. This new allowable
maximum production rate shall remain in effect until successfully tested at a higher rate.
3. The owner/operator shall request a higher production rate when necessary. Testing at no less
than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the
new rate) will then be allowed if the test is successful. This process may be repeated until the
maximum AO production rate is achieved.
H. Existing Source Operation
For an existing source/emission point, the production rate during all compliance testing shall be
no less than 90% of the maximum production achieved in the previous three (3) years.
7
II.B.2.b
II.B.3
II.B.3.a
I. Internal Combustion Engines
Portable testing monitors may be used to test natural gas fired boilers and IC engines. If portable
monitors are to be used, an EPA method test must be performed at least once every five (5)
years. This applies to sources that do not have a federal testing requirement listed in an NSPS,
NESHAP, MACT or other federal standards. [R307-401-8]
Status: In Compliance. See the Stack Test Review (DAQC-343-21) for Stack Test
conducted on March 2, 2021, for Cogeneration Engine #1, (19-100), and Cogeneration
Engine #2, (19-300). See the Stack Test Review (DAQC-0736-19) for the Stack Test
conducted on May 7, 2019, for Cogeneration Engine #3 (06-003).
The NDSD shall initiate an annual service program for the gas system, engine-generator
Carburetion system, and the computer control system by a factory-trained service technician.
At that time, the exhaust emissions shall be checked and the carburetion system shall be
rebaselined. A baseline emission report showing compliance for NOx and CO, using data
collected by a Waukesha Emissions Tester, or equivalent, will be used by the factory
representative or other factory-trained service technician and recorded. The baseline emissions
from the engine-generators shall be determined during the air-to-fuel set up procedure performed
by the manufacturer or a manufacturer-trained service technician. The engine-generator base line
emissions shall be rebaselined any time the carburetion system is serviced, or any time that a new
baseline is set due to annual maintenance or repair. [R307-401-8]
Status: In Compliance. According to the North Davis Sewer District, preventative
maintenance is performed every six months to meet the requirement of this AO Condition.
Emergency Generator Engine Requirements
The owner/operator shall not operate the emergency engine on site for more than 100 hours per
rolling 12-month period during non-emergency situations. There is no time limit on the use of
the engine during emergencies [40 CFR 63 Subpart ZZZZ, R307-401-8]
II.B.3.a.1
II.B.3.a.2
To determine compliance with a rolling 12-month total, the owner/operator shall calculate a new
12-month total by the 20th day of each month using data from the previous 12 months. Records
documenting the operation of the emergency engine shall be kept in a log and shall include the
following:
1. The date the emergency engine was used
2. The duration of operation in hours
3. The reason for the emergency engine usage. [40 CFR 63 Subpart ZZZZ,
R307-401-8]
Status: In Compliance. According to the North Davis Sewer District, the 2001, diesel, 1,825
kW Caterpillar Emergency Generator (20-200) runs for 30 minutes every two weeks. The
rolling 12-month emergency engine usage hours from January to December 2023, indicated
38.92 hours. See the attachment for additional information.
To determine the duration of operation, the owner/operator shall install a non-resettable hour
meter for the emergency engine. [40 CFR 63 Subpart ZZZZ, R307-401-8]
Status: In Compliance. This emergency generator is equipped with a non-resettable hour
meter.
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II.B.3.b
II.B.3.b.1
II.B.4
II.B.4.a
The sulfur content of diesel fuel burned in the emergency engine on site shall not exceed 15 ppm by weight.
[40 CFR 60 Subpart IIII, 40 CFR 63 Subpart ZZZZ, R307-401-8]
Status: In Compliance. According to a delivery ticket from Pilot Thomas Logistics, the
sulfur content for diesel indicated 15 parts per million (ppm). See the attachment for
additional information.
The sulfur content shall be determined by ASTM Method D2880-71, D4294-89, or approved equivalent.
Certification of fuels shall be either by the owner/operator's own testing, or test reports from the fuel marketer.
[R307-401-8]
Status: In Compliance. According to a delivery ticket from Pilot Thomas Logistics, the
sulfur content for diesel indicated 15 ppm. See the attachment for additional information.
Iron Sponge Adsorber Unit Requirements
The iron sponge adsorber units shall treat the digester gas prior to being combusted.
[R307-401-8]
Status: In Compliance. The adsorber units treat the digester gas prior to being
combusted.
II.B.4.b The iron sponge adsorber units shall be installed in series. The digester gas shall be treated with
the iron sponge adsorber unit that is designed to reduce the H2S concentration to 58 ppm and
then with the iron sponge adsorber unit that is designed to reduce the H2S concentration to 25
ppm. [R307-401-8]
Status: In Compliance. The iron sponge adsorber units are installed in series, and are
designed to reduce the H2S concentration as required by this AO Condition.
II.B.4.c The H2S concentration in the gas stream exiting the iron sponge adsorber unit that is designed
to reduce the H2S concentration to 25 ppm will be measured weekly by Draeger tubes or
equivalent, as determined by the Director. [R307-401-8]
Status: In Compliance. The North Davis Sewer District uses Draeger tubes weekly to
measure the H2S concentration. The North Davis Sewer District also sends out a sample for
laboratory analysis every three months. See the attachment for additional information.
II.B.4.d The five-week rolling average H2S concentration in the digester shall be determined within seven
days of the H2S measurement. The five-week rolling average shall start the periods for
regeneration or replacement of the iron sponge, as described in II.B.4.d.1 and II.B.4.d.2.
Compliance shall be determined by following the regeneration and replacement of the iron
sponge within the given period. [R307-401-8]
Status: In Compliance. According to the North Davis Sewer District database, the
five-week rolling averaged indicated zero. See the attachment for additional information.
According to the North Davis Sewer District, they no longer regenerate the iron sponge
media. In addition, the iron sponge media is replaced every four years, and was last
replaced on September 13, 2023.
II.B.4.d.1 If the five-week rolling average H2S concentration exceeds 25 ppm, the media in the iron sponge
adsorber unit that is designed to reduce the H2S concentration to 25 ppm shall be regenerated
within two weeks of the five-week rolling average calculation. After media regeneration, the
five-week rolling average will be restarted. [R307-401-8]
Status: Not Applicable at this time. The five-week rolling average H2S concentration
indicated zero, and the North Davis Sewer District no longer regenerate the iron sponge
media.
9
II.B.4.d.2 If the rolling five-week average H2S concentration exceeds 25 ppm after regeneration described
in II.B.4.d.1, the media shall be replaced within 90 days of the rolling five-week average H2S
concentration exceeding 25 ppm. After media replacement, the five-week rolling average will be
restarted. [R307-401-8]
Status: Not Applicable at this time. The five-week rolling average H2S concentration
indicated zero, and the North Davis Sewer District no longer regenerate the iron sponge
media. The iron sponge media is replaced every four years, and was last replaced on
September 13, 2023.
II.B.4.e Records of the measured H2S concentration, five-week rolling average H2S concentration, iron
sponge media regeneration, and iron sponge media replacement shall be maintained.
[R307-401-8]
Status: In Compliance. The North Davis Sewer District maintains records in their
database, and the records were reviewed during the inspection. See the attachment for
additional information.
Section III: APPLICABLE FEDERAL REQUIREMENTS
In addition to the requirements of this AO, all applicable provisions of the following federal programs
have been found to apply to this installation. This AO in no way releases the owner or operator from any
liability for compliance with all other applicable federal, state, and local regulations including UAC
R307.
NSPS (Part 60) Subpart IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines
Status: Not applicable. The Emergency Generator engine in AO Condition II.A.8, is not applicable to
Subpart IIII because this engine was installed in 2004, prior to the applicability of this subpart.
NSPS (Part 60) JJJJ : Standards of Performance for Stationary Spark Ignition Internal Combustion Engines
Status: In Compliance. This subpart is applicable to Cogeneration Engine #1 (19-100), and
Cogeneration Engine #2 (19-300). The North Davis Sewer District meets compliance with this subpart
by properly maintaining each engine, by maintaining usage records and by conducting Stack Tests.
According to the North Davis Sewer District, only one out of the three Cogenerators runs at a time. See
the Stack Test Review (DAQC-343-21) for Stack Tests conducted on March 2, 2021, for Cogeneration
Engine #1 (19-100), and Cogeneration Engine #2 (19-300).
MACT (Part 63) - ZZZZ: National Emissions Standards for Hazardous Air Pollutants for Stationary
Reciprocating Internal Combustion Engines
Status: In Compliance. This subpart is applicable to the Cogeneration Engine #3 in AO Condition
II.A.7, and the Emergency Generator Engine in AO Condition II.A.8.
A Stack Test was conducted for the Cogeneration Engine #3 in AO Condition II.A.7 on May 7, 2019. See
the Stack Test Review (DAQC-0736-19) for additional information. The North Davis Sewer District
maintains records of maintenance activities conducted.
The 2001, diesel, 1,825 kW Caterpillar Emergency Generator (20-200) is equipped with a non-resettable
hour meter. The rolling 12-month emergency engine usage hours from January to December 2023,
indicated 38.92 hours. According to a delivery ticket from Pilot Thomas Logistics, the sulfur content for
diesel indicated 15 ppm. See the attachment for additional information.
10
AREA SOURCE RULES EVALUATION:
The following Area Source Rules were evaluated during this inspection:
R307-203. Emission Standards: Sulfur Content of Fuels
Status: In Compliance. According to a delivery ticket from Pilot Thomas Logistics, the sulfur
content for diesel indicated 15 ppm. See the attachment for additional information.
R307-210. Stationary Sources
Status: This area source rule is applicable to NSPS (Part 60) Subpart IIII, and also to NSPS
(Part 60) OOO. See Section III for the compliance determination.
R307-214. National Emission Standards for Hazardous Air Pollutants
Status: This area source rule is applicable to 40 CFR Part 63 Subpart ZZZZ. See Section III for the
compliance determination.
R307-325 – Ozone Nonattainment and Maintenance Areas: General Requirements
Status: In Compliance. The purpose of this rule is the control of VOCs in nonattainment or
maintenance areas. During this inspection, there were no spills or open containers with VOC products
noted.
R307-335 – Degreasing
Status: In Compliance. The North Davis Sewer District operates two Safety Kleen Parts Washers
to clean equipment parts using the Safety-Kleen Premium Solvent. The spent solvent is transported
and disposed offsite by Safety Kleen. The Parts Washers were last serviced by Safety Kleen on
September 8, 2023. See the attachment for additional information.
R307-328 – Gasoline Transfer and Storage
Status: In Compliance. The North Davis Sewer District operates one, 1,000-gallon gasoline
Above-Ground Storage Tank equipped with secondary containment to prevent spills. According to the
North Davis Sewer District, the tank is loaded by a third-party contractor, and the gasoline
dispenser is equipped with Stage II Vapor Recovery system to reduce emissions during transfers.
See the attachment for additional information.
11
EMISSION INVENTORY
Status: In Compliance. The North Davis Sewer District submitted the 2022 Emissions Inventory
Report, and the emissions indicated compliance with the PTEs of this AO.
Listed below are the Actual Emissions Inventory provided from North Davis Sewer District- Wastewater
Treatment Plant. A comparison of the estimated total potential emissions (PTE) on Approval Order (AO)
DAQE-AN101590008-17, dated November 1, 2017. PTE are supplied for supplemental purposes only.
Criteria Pollutant PTE tons/yr Actuals tons/yr
CO2 Equivalent 19250.00 ---
Carbon Monoxide 81.94 8.2
Nitrogen Oxides 36.60 3.5
Particulate Matter - PM10 1.45 1.25
Particulate Matter - PM2.5 0.58
Sulfur Dioxide 0.78 0.17
Volatile Organic Compounds 19.10 7.12
Hazardous Air Pollutant PTE lbs/yr Actuals lbs/yr
1,1,2,2-Tetrachloroethane (CAS #79345) 10
1,1,2-Trichloroethane (CAS #79005) 8
1,3-Butadiene (CAS #106990) 65
1,3-Dichloropropene (CAS #542756) 6
2,2,4-Trimethylpentane (CAS #540841) 61
2-Methynapthalene (CAS #91576) 8
Acetaldehyde (CAS #75070) 2040
Acrolein (CAS #107028) 1252
Benzene (Including Benzene From Gasoline) (CAS #71432) 109
Biphenyl (CAS #92524) 52
Carbon Tetrachloride (CAS #56235) 9
Chlorobenzene (CAS #108907) 7
Chloroform (CAS #67663) 7
Ethyl Benzene (CAS #100414) 10
Ethylene Dibromide (Dibromoethane) (CAS #106934) 11
Formaldehyde (CAS #50000) 12880
Hexane (CAS #110543) 320
Methanol (CAS #67561) 608
Methylene Chloride (Dichloromethane) (CAS #75092) 5
Naphthalene (CAS #91203) 18
Phenol (CAS #108952) 6
Polycyclic aromatic hydrocarbons (CAS #65996932) 7
Propylene[1-Propene] (CAS #115071) 5
Styrene (CAS #100425) 6
Toluene (CAS #108883) 100
Vinyl Chloride (CAS #75014) 4
Xylenes (Isomers And Mixture) (CAS #1330207) 45
12
PREVIOUS ENFORCEMENT
ACTIONS: No enforcement actions within the past five years.
COMPLIANCE STATUS &.
RECOMMENDATIONS: The North Davis Sewer District is in compliance with the
conditions in AO DAQE-AN101590008-17 dated November 1,
2017. The North Davis Sewer District demonstrated good
housekeeping practices.
HPV STATUS: Not Applicable.
RECOMMENDATION FOR
NEXT INSPECTION: Inspect as usual. Required PPE includes steel-toe boots and
safety glasses.
NSR RECOMMENDATIONS: In AO Condition II.A.3, there are two Carbon Adsorbers, only
one is run at a time, the other serves as backup. In AO Condition
II.A.8, Subpart IIII does not apply because this engine was
installed in 2004, prior to the applicability of this subpart.
ATTACHMENTS: Applicable Supporting Documentation Included
2/12/24, 1:18 PM
The above-ground gasoline tank
Irene Tucker
State of Utah Mail -The above-ground gasoline tank
Irene Tucker <itucker@utah.gov>
Myron Bachman
Good morning Irene, the fuel tanks do not.
Myron
Dir ( 801 ) 728-6830
Cell (801) 430-3422
Myron Bachman
Plant Superintendent
Te l (801) 825-0712
NORTH DAVIS SEWER DISTRICT
____________________________ Reclaiming Earth's Most Valuable Resource
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